12
September 2024
Increased Mineral Resource at
Mako Satellite Tomboronkoto and Initial Mineral Resource Declared
at Mansala in Guinea
Resolute Mining Limited ("Resolute"
or "the Company") (ASX/LSE: RSG) is pleased to provide an update on
exploration in Senegal and Guinea.
In Senegal, Resolute has been
focusing on three potential satellite deposits - Tomboronkoto,
Bantaco and Laminia - that could extend the life of the Mako mine.
Tomboronkoto is the most advanced prospect with an Indicated and
Inferred Mineral Resource Estimate (MRE). The other satellite
deposit which has drilling ongoing is Bantaco which has extensive artisanal workings; an update is expected
in Q4 2024.
In parallel, Resolute has been
undertaking 'Greenfields' exploration on projects located within
the Siguiri Basin in Guinea. The most advanced Prospect is Mansala
which has an initial Inferred MRE and remains the focus for the
Company in Guinea.
Highlights
Senegal, Tomboronkoto
•
Total contained gold at Tomboronkoto has increased
by at least 30% from the initial MRE announced in January to over
343 koz (initial MRE: 264 koz) grading 2.1g/t Au at 1g/t cut off or
571 koz (initial MRE: 403 koz) grading 1.1 g/t at 0.5 g/t
cut-off
•
Infill drilling program down to 150m was highly
successful with 87% of the updated Mineral Resource classified in
the Indicated category
•
Mineralisation remains open down dip and along
strike to the southwest
•
Preliminary metallurgical test-work performed by
Resolute on samples from Tomboronkoto show the mineralisation is
free milling with recoveries exceeding 90%
from both weathered and fresh material
•
Drilling is ongoing and the focus over the
remainder of 2024 will be to complete an additional 7,000m of
diamond drilling aiming to further expand the Tomboronkoto Mineral
Resource
•
A more accurate timeline on the potential
development of Tomboronkoto is expected in Q1 2025 together with an
update from the drilling over the remainder of 2024
Senegal, Bantaco
•
RC drilling is ongoing at the Bantaco Joint
Venture which was signed by Resolute in early 2024
•
An update on the program of wide spaced drilling
to traverse the outcropping gold mineralisation and coincident
geochemical anomalies is expected in Q4 2024
Guinea, Mansala
•
Drilling to date has outlined a gold mineralised
shear zone over 1.5km long and an Inferred Mineral Resource of
6.6Mt grading 1.6 g/t Au for 343 koz at a cut-off of 1
g/t
•
The Mansala Mineral Resource remains open along
strike and down dip and future work will focus on expanding this
resource
•
Pending
future drilling results Resolute will assess how the Mansala
Prospect fits into the Company's organic growth strategy
Terry Holohan, CEO and Managing
Director, commented:
"We are progressing well with our priority of
extending the life of the Mako operation with further drilling
success and a significant increase in the Mineral Resources at the
Tomboronkoto project which is close to the Mako processing
facility. Engineering work is progressing in parallel to
ensure an investment decision can be made on this project in early
2025.
At
the same time the drilling results at the nearby Bantaco project
are also starting to intersect mineralisation close to surface and
we will publish these results in due course.
We
are also pleased to publish the initial exploration discovery from
our 100% held greenfields Niagassolo project in Guinea.
Drilling over the past year has led to the completion of an initial
Mineral Resource Estimate at the newly named Mansala
Prospect.
We
recently agreed terms of an earn-in for a project in Cote D'Ivoire
and this will be announced soon subject to finalising our due
diligence.
Along with the ongoing drilling programs at the Syama
Greenstone Belt continuously discovering more gold we will shortly
have exploration drilling programs ongoing in four jurisdictions in
West Africa and we remain keen to look at further opportunities in
this highly prospective region."
Tomboronkoto, Senegal
Tomboronkoto is located 16km east of
the Mako Processing Plant - see Figure 1. It is approximately 20km
by road and, therefore pending studies, we are confident of the
opportunity for hauling material to the existing Plant.
Tomboronkoto is the most advanced of
the three potential satellite deposits that could result in an
extension to the Mako mine. Drilling is continuing at Tomboronkoto
to further expand the resource with a more accurate timeline on
development of the prospect expected in Q1 2025.
Figure 1: Senegal Geology and
Project Locations.
Drilling Program
Resolute continued the drilling
program at Tomboronkoto throughout 2024 with a combination of
Reverse Circulation (RC) and diamond drilling using multiple drill
rigs. For the year to date a total of 26 diamond holes for
6,000 metres and 66 RC holes for 10,263m of drilling has been
completed.
The drilling program in 2024 has
been focused on upgrading the classification of the Initial Mineral
Resource reported to the ASX on 24 January 2024 which was 100% in
the Inferred category. As of the latest
updated MRE in August 2024 a total of 87% of the current Mineral
Resource is classified as Indicated category. The Resource conversion to Indicated category is required to
allow declaration of Ore Reserves following mining and geotechnical
studies.
Significant intersections are listed
in Appendix 1.
Figure 2. Tomboronkoto Drone
Imagery and Drillhole Locations
Mineralisation
Gold mineralisation at Tomboronkoto
is hosted within a north-east striking shear zone in a granodiorite
intrusive. Increasing gold grade appears to correlate with the
intensity of pyrite development and exhibits good lateral and
vertical continuity through the mineralised zone.
Mineralisation has a relatively
simple geometry comprising a zone that varies from 30 to 60m in
width, along the 1,700m strike length drilled to date. The zone
dips approximately 70⁰ to the south-southeast - a cross-section
representative of the typical mineralisation shape is shown on
Figure 3.
Figure 3: Cross Section
Tomboronkoto
Mineral Resource Estimate
The Tomboronkoto MRE was
re-estimated in August 2024 using wireframe constrained Ordinary
Kriged estimation methodology, within two nested Leapfrog Indicator
wireframes at 0.2 g/t Au and 0.75g/t Au.
A Global Mineral Resource Estimate
of 15.5Mt grading 1.1g/t Au for 571,000oz was estimated at a
cut-off of 0.5g/t (in-line with the current cut-off grade used to
define Mako's Mineral Resources). At a higher 1g/t cut off
the grade increases to 2.1g/t with a total of 343,000oz Au. Further
cost analysis is required to determine the appropriate cut-off
grade for Tomboronkoto.
Resource definition infill drilling
at Tomboronkoto was very successful with 100% conversion of the all
the previously reported Inferred Mineral Resources quoted in
January 2024 to the Indicated category in the August 2024 MRE
update. A total of 87% of the current
Mineral Resource is classified as Indicated category which will
underpin the upcoming studies to declare an Ore Reserve at
Tomboronkoto.
The updated MRE is an increase of
30% over the initial MRE using a cut off of 1g/t Au. The Tables
below include the initial Inferred MRE announced in January 2024
and the latest updated MRE from August 2024.
Tomboronkoto Mineral Resource
(0.5g/t Au cut-off)
|
|
|
At December
2023
|
At August
2024
|
|
Classification
|
Tonnes
|
Grade
(g/t Au)
|
Ounces (Au)
|
Tonnes
|
Grade
(g/t Au)
|
Ounces (Au)
|
|
Inferred
|
10,204,000
|
1.2
|
403,000
|
2,300,000
|
1.0
|
75,000
|
|
Indicated
|
-
|
-
|
-
|
13,190,000
|
1.2
|
496,000
|
|
Total
|
10,204,000
|
1.2
|
403,000
|
15,500,000
|
1.1
|
571,000
|
|
Table 1: Tomboronkoto Mineral
Resources at December 2023 and August 2024 (0.5g/t cut
off)
Tomboronkoto Mineral Resource
(1g/t Au cut-off)
|
|
|
At December
2023
|
At August
2024
|
|
Classification
|
Tonnes
|
Grade
(g/t Au)
|
Ounces (Au)
|
Tonnes
|
Grade
(g/t Au)
|
Ounces (Au)
|
|
Inferred
|
3,685,000
|
2.2
|
264,000
|
613,000
|
1.9
|
38,000
|
|
Indicated
|
-
|
-
|
-
|
4,439,000
|
2.1
|
305,000
|
|
Total
|
3,685,000
|
2.2
|
264,000
|
5,052,000
|
2.1
|
343,000
|
|
Table 2: Tomboronkoto Mineral
Resources at December 2023 and August 2024 (1g/t cut
off)
Future Work
To date the Tomboronkoto deposit is
only drilled to 150m below surface and is open down dip. Drilling
is currently targeting the extensions of the resource between 150m
and 200m below surface. Preliminary results suggest that the
mineralisation is continuous down dip.
Drilling at Tomboronkoto will
concentrate on open pit extractable Mineral Resources with the
expectation that it will provide mill feed for the Mako treatment
facility.
Preliminary metallurgical test work
was undertaken by Resolute on Reverse Circulation samples from the
recent drilling campaign conducted at Tomboronkoto. This
showed the mineralisation is free milling
with recoveries exceeding 90% from both weathered
and fresh material.
Drilling is ongoing and the focus
over the remainder of 2024 will be to complete an additional 7,000m
of diamond drilling with the aim of further expanding the
Tomboronkoto Mineral Resource.
Bantaco, Senegal
Resolute is in a Joint Venture with
SNEPAC, a local Senegalese company, to earn into the Bantaco
prospect located approximately 20km east of Mako.
The Bantaco project presents an
opportunity in the short term to find an economically exploitable
gold resource to extend the life of Mako. The project area
has extensive artisanal workings in two main locations, Baisso in
the southwest and Bantaco in the northeast of the
permit.
Drilling commenced in June 2024 and
is ongoing. An update on the program of wide spaced drilling to
traverse the outcropping gold mineralisation and coincident
geochemical anomalies is expected in Q4 2024.
Guinea Exploration
Resolute controls three exploration
projects in Guinea, the 100% owned Niagassola and Siguiri-Kouroussa
projects and the Kourouba Joint Venture. The Niagassola and
Siguiri-Kouroussa Projects lie on major North-South striking
regional structures within the Siguiri Basin. The Kourouba
Joint Venture is located on a series of mafic volcanics units on
the western margin of the Siguiri Basin.
Over the past three years Resolute
conducted standard regional exploration techniques over these
Greenfields projects. Programs of regional mapping, soil
geochemistry and rock chip sampling identified a number of areas
with gold anomalies. These areas were tested with auger
drilling programs which further defined the anomalous
zones.
Figure 4. Guinea Geology and
Project Locations
Mansala Prospect
Regional soil and rock chip geochemistry over
the entire area of the Niagassola Project identified an area of
strong gold anomalism on the western edge of the permit.
This anomaly was followed up by regional auger
and air core drilling which further outlined an extensive zone of
gold mineralisation.
Reverse Circulation (RC) and diamond drilling
programs in 2023 and 2024 have successfully discovered a previously
unknown gold zone now named the Mansala Prospect.
Drilling to date has confirmed a north striking
1.5km long gold mineralised shear zone. Mineralisation is
interpreted to be steeply-dipping and wholly hosted within
sedimentary units. Intensity of gold mineralisation correlates with
sedimentary grain size, arsenopyrite and quartz vein development
and exhibits good lateral and vertical continuity throughout the
zone.
Significant intersections are shown in Appendix
1.
Mineral Resource Estimation
An Initial Mineral Resource Estimate for the
Mansala Prospect was undertaken in Q2 2024. Estimation
methodology was comprised of wireframe constrained Ordinary Kriged
techniques. A summary of the Mansala Resource Parameters is
show on the following pages.
A global Mineral Resource of 6.6million tonnes
at a grade of 1.6g/t Au for a total of 343,000oz of gold using a
cut off of 1g/t Au has been estimated at Mansala.
Drilling to date is on 100m spaced lines
therefore Resource classification is 100% Inferred
category.
Mansala Mineral Resource
(1g/t Au cut-off)
|
Classification
|
Tonnes
|
Grade (g/t
Au)
|
Ounces (Au)
|
Inferred
|
6,625,000
|
1.6
|
343,000
|
Total
|
6,625,000
|
1.6
|
343,000
|
Table 3: Mansala Mineral
Resources at August, 2024 (1g/t cut off)
Future Work
The mineralisation zone at Mansala is open
along strike to the north and south and down dip. Drilling
programs to extend the resources are planned to recommence later in
2024 after the conclusion of the wet season in Guinea.
A prospect scale Geophysical IP survey also
identified an offset to the west of the northern extensions of the
mineralisation. This new target will be tested in H2
2024.
Pending future drilling results
Resolute will assess how the Mansala Prospect fits into the
Company's organic growth strategy
Figure 5: Mansala drillhole
location and drone imagery
Figure 6. Mansala Cross
Section
Summary of Tomboronkoto Resource Parameters
A summary of JORC Table 1 is provided below for
compliance regarding the Mineral Resources reported within and
in-line with requirements of ASX Listing Rule 5.8.1.
Geology and geological interpretation
Mineralisation is currently
interpreted to be within a shear in the granodiorite unit.
Intensity of gold mineralisation appears to correlate with the
intensity of pyrite development and exhibits good lateral and
vertical continuity through the mineralised zone.
Mineralisation has a relatively
simple geometry comprising a zone that varies from 30 to 60m in
width, along the 1,700m strike length drilled to date. The zone
dips approximately 70⁰ to the south-southeast.
Sampling and sub-sampling techniques
Reverse circulation samples were
collected on 1m intervals by riffle split (dry) or by scoop (wet)
to obtain a 1-3kg sample.
Sample preparation includes oven
drying, crushing to 10mm, splitting and pulverising to 85% passing
-75µm. These preparation techniques are deemed to be appropriate to
the material being sampled.
Reverse circulation and core field
duplicates were collected by the company at a rate of 1:20
samples.
Sampling, sample preparation and
quality control protocols are of industry standard, and all
attempts were made to ensure an unbiased representative sample was
collected.
Drilling techniques
Drill types used include reverse
circulation with face sampling bit and historic core drilling using
PQ and HQ sized bits. All Resolute drilling to date has been RC.
Historic core drilling has been incorporated into the
resource.
Sample analysis method
All samples were dispatched to ALS
Kedougou for sample preparation and to ALS Ouagadougou for gold
analysis by 30g fire assay fusion with AAS instrument finish
(method code Au-AA25). Over-range results were re-analysed and
reported by 30g fire assay fusion with gravimetric finish (method
code Au-GRA21). The analytical method was appropriate for the style
of mineralisation.
No geophysical tools were used to
determine elemental concentrations.
Quality control (QC) procedures
included the use of certified standards (1:40), non-certified sand
blanks (1:40) and reverse circulation/core field duplicates
(1:20).
Laboratory quality control data,
including laboratory standards, blanks, duplicates, repeats, grind
size results and sample weights were also captured into the digital
database.
Analysis of the QC sample assay
results indicates that an acceptable level of accuracy and
precision has been achieved.
Basis for selected cut-off grade
The cut-off grades selected has been
selected using previous Resource (0.5 g/t Au) and Reserve
(1.0 g/t Au) cut-off grades used at the nearby Mako
deposit.
Mining and metallurgical methods and other material modifying
factors
Extensive metallurgical
investigations and reporting have been completed prior to the
commencement of mining and milling at the nearby Mako
deposit.
The processing method involves
crushing, and milling, followed by conventional CIL
recovery.
There is no evidence to suggest that the
metallurgical characteristics of ore extracted from Tomboronkoto
would change from that encountered at Mako. Preliminary
metallurgical test-work on samples from Tomboronkoto show similar
characteristics to the Mako ore and is expected to be treated
though the existing circuits.
Classification criteria
Mineral Resources were classified in
accordance with the Australasian Code for the Reporting of
Exploration Results, Mineral Resources and Ore Reserves (JORC,
2012).
The deposit has been classified as
Indicated or Inferred Mineral Resource based on a combination of
quantitative and qualitative criteria which include geologic
continuity, confidence in volume models, data quality, sample
spacing, lode continuity, and estimation parameters (number of
informing composites, estimation pass number, kriging quality
parameters, and minimum and average distance
composites).
The Indicated portion of the
resource was defined within a wireframe constructed around blocks
estimated in the first two passes, where drilling density is equal
to or exceeding 25x25m spacing, and Kriging efficiency is generally
greater than or equal to 0.6. Mineralisation not classified as
Indicated has been classified as Inferred.
Summary of Mansala Resource
Parameters
A summary of JORC Table 1 is provided below for
compliance regarding the Mineral Resources reported and in-line
with requirements of ASX Listing Rule 5.8.1
Geology and geological interpretation
Mineralisation is interpreted to be
steeply-dipping within the sedimentary unit. Intensity of gold
mineralisation correlates with sedimentary grain size, the
intensity of arsenopyrite and quartz vein development and exhibits
good lateral and vertical continuity throughout the mineralised
zone.
Mineralisation has a geometry of approximately
40m width, and 1,000m strike length.
Sampling and sub-sampling techniques
Sampling has been conducted by diamond drill
coring and reverse circulation drilling.
Diamond core has been logged to geological
contacts and sampled at 1m intervals. All core is assayed and cut
lengthwise into half core with a diamond blade rock saw, numbered,
and bagged for dispatch.
Reverse circulation chips are logged and sampled
at 1m intervals. Every interval is assayed, with chips
systematically divided into 1/8 proportion using a riffle splitter
after the sample is recovered from the cyclone. Samples are
numbered and bagged prior to dispatch.
Reverse circulation and core duplicates are
collected at a rate of 1 duplicate to 20 samples. Blanks or
certified reference material are inserted at a rate of 1 to 20
samples.
Drilling techniques
Diamond core drilling with NTW diameter to
target depth, with some NQ2 diameter as tails where possible.
Reverse circulation drilling with 4" or 4.5" hammer and 4" rod
string to target.
Classification criteria
Mineral Resources were classified in accordance
with the Australasian Code for the Reporting of Exploration
Results, Mineral Resources, and Ore Reserves (JORC,
2012).
The deposit has been classified entirely as
Inferred based on a combination of quantitative and qualitative
criteria including geologic continuity, confidence in volume
models, data quality, sample spacing, and estimation
parameters.
Drill lines are relatively widely-spaced, and do
not support a classification above Inferred.
Sample analysis method
All samples are analysed with 30g fire assay
fusion with AAS instrument finish (method code Au_AA25). Over-range
results are re-analysed and reported by 30g fire assay fusion with
gravimetric finish (method code Au-GRA21).
Analysis of QC sample assay results indicates an
acceptable level of accuracy and precision.
Basis for selected cut-off grade
The cut-off grade selected is consistent with
other deposits in the Siguiri basin.
Mining and Metallurgical methods and other modifying
factors
The shallow occurrence of the mineralisation
indicates that open pit mining is appropriate, in line with other
deposits in the area. The estimation methodology used results in an
amount of edge dilution being incorporated into the model. No
account of mining loss has been incorporated.
No specific assumptions were made regarding
metallurgical factors.
Contact
Authorised by Mr Terry
Holohan, Managing Director and Chief Executive
Officer
Competent Persons Statement
The information in this report that
relates to the Exploration Results, Mineral Resources and Ore
Reserves is based on information compiled by Mr Bruce Mowat, a
member of The Australian Institute of Geoscientists. Mr Bruce Mowat
has more than 5 years' experience relevant to the styles of
mineralisation and type of deposit under consideration and to the
activity which he is undertaking to qualify as a Competent Person,
as defined in the 2012 Edition of the "Australasian Code for
Reporting of Exploration Results, Mineral Resources and Ore
Reserves" (the JORC Code). Mr Bruce Mowat is a full-time employee
of the Resolute Mining Limited Group and holds equity securities in
the Company. He has consented to the inclusion of the matters in
this report based on his information in the form and context in
which it appears. This information was prepared and disclosed under
the JORC Code 2012 except where otherwise noted.
The information in this announcement
that relates to the Mineral Resource estimate has been based on
information and supporting documents prepared by Mr Patrick
Smillie, a Competent Person who is a Registered Member of the
Society for Mining, Metallurgy, and Exploration (SME). Mr Smillie
is a full-time employee Resolute Mining Limited Group and has
sufficient experience relevant to the style of mineralisation and
type of deposit under consideration and to the activity which has
been undertaken to qualify as a Competent Person. Mr Smillie
confirms that the Mineral Resource estimate is based on information
in the supporting documents and consents to the inclusion in the
report of the Mineral Resource estimate and related content based
on the information in the form and context in which it
appears.
Cautionary Statement about Forward-Looking
Statements
This announcement contains certain
"forward-looking statements" including statements regarding our
intent, belief or current expectations with respect to Resolute's
business and operations, market conditions, results of operations
and financial condition, and risk management practices. The words
"likely", "expect", "aim", "should", "could", "may", "anticipate",
"predict", "believe", "plan", "forecast" and other similar
expressions are intended to identify forward-looking statements.
Indications of, and guidance on, future earnings, anticipated
production, life of mine and financial position and performance are
also forward-looking statements. These forward-looking statements
involve known and unknown risks, uncertainties and other factors
that may cause Resolute's actual results, performance and
achievements or industry results to differ materially from any
future results, performance or achievements, or industry results,
expressed or implied by these forward-looking statements. Relevant
factors may include (but are not limited to) changes in commodity
prices, foreign exchange fluctuations and general economic
conditions, increased costs and demand for production inputs, the
speculative nature of exploration and project development,
including the risks of obtaining necessary licences and permits and
diminishing quantities or grades of reserves, political and social
risks, changes to the regulatory framework within which Resolute
operates or may in the future operate, environmental conditions
including extreme weather conditions, recruitment and retention of
personnel, industrial relations issues and litigation.
Forward-looking statements are based
on Resolute's good faith assumptions as to the financial, market,
regulatory and other relevant environments that will exist and
affect Resolute's business and operations in the future. Resolute
does not give any assurance that the assumptions will prove to be
correct. There may be other factors that could cause actual results
or events not to be as anticipated, and many events are beyond the
reasonable control of Resolute. Readers are cautioned not to place
undue reliance on forward-looking statements, particularly in the
current economic climate with the significant volatility,
uncertainty and disruption caused by the COVID-19 pandemic.
Forward-looking statements in this document speak only at the date
of issue. Except as required by applicable laws or regulations,
Resolute does not undertake any obligation to publicly update or
revise any of the forward-looking statements or to advise of any
change in assumptions on which any such statement is based. Except
for statutory liability which cannot be excluded, each of Resolute,
its officers, employees and advisors expressly disclaim any
responsibility for the accuracy or completeness of the material
contained in these forward-looking statements and excludes all
liability whatsoever (including in negligence) for any loss or
damage which may be suffered by any person as a consequence of any
information in forward-looking statements or any error or
omission.
Appendix 1: Recent Drilling Results
Mansala
Hole_ID
|
North (WGS)
|
East (WGS)
|
RL
(m)
|
Dip
|
Azi
(WGS)
|
EOH
(m)
|
From
(m)
|
To
(m)
|
Width
(m)
|
Au
(g/t)
|
NGDD0003
|
1300395
|
486172
|
508
|
-50
|
266
|
229.5
|
51
|
79
|
28
|
1.25
|
NGDD0003
|
|
|
|
|
|
|
115
|
136
|
21
|
1.83
|
NGDD0008
|
1300004
|
486115
|
510
|
-50
|
270
|
251
|
117
|
146
|
29
|
1.38
|
NGDD0009
|
1299889
|
486116
|
561
|
-50
|
270
|
280
|
167
|
177
|
10
|
2.52
|
NGRC0042
|
1300188
|
486098
|
509
|
-49
|
270
|
159
|
40
|
65
|
25
|
1.77
|
NGRC0042
|
|
|
|
|
|
|
82
|
129
|
47
|
1.29
|
NGRC0042A
|
1300190
|
486099
|
509
|
-50
|
270
|
61
|
39
|
61
|
22
|
1.72
|
NGRC0043
|
1300290
|
486127
|
522
|
-50
|
270
|
190
|
44
|
60
|
16
|
2.24
|
NGRC0043
|
|
|
|
|
|
|
67
|
78
|
11
|
2.74
|
NGRC0044
|
1300293
|
486077
|
531
|
-48
|
270
|
123
|
22
|
45
|
23
|
2.35
|
NGRC0044A
|
1300295
|
486077
|
531
|
-48
|
270
|
63
|
14
|
44
|
30
|
1.97
|
NGRC0045
|
1300389
|
486098
|
531
|
-48
|
270
|
105
|
1
|
16
|
15
|
2.83
|
NGRC0046
|
1300524
|
486172
|
497
|
-49
|
270
|
183
|
47
|
92
|
45
|
1.31
|
NGRC0046
|
|
|
|
|
|
|
102
|
127
|
25
|
2.06
|
NGRC0048
|
1300598
|
486178
|
497
|
-51
|
270
|
126
|
44
|
59
|
15
|
1.74
|
NGRC0049
|
1300709
|
486275
|
470
|
-47
|
270
|
222
|
173
|
201
|
28
|
1.71
|
NGRC0050
|
1300707
|
486223
|
475
|
-49
|
270
|
180
|
18
|
55
|
37
|
1.57
|
NGRC0051
|
1300707
|
486170
|
483
|
-50
|
270
|
121
|
40
|
60
|
20
|
2.23
|
NGRC0054
|
1300104
|
486122
|
501
|
-50
|
270
|
211
|
128
|
159
|
31
|
2.4
|
NGRC0055
|
1300099
|
486083
|
513
|
-50
|
270
|
160
|
68
|
85
|
17
|
2.56
|
NGRC0056
|
1300102
|
486028
|
525
|
-47
|
266
|
103
|
20
|
48
|
28
|
2.45
|
NGRC0057
|
1300011
|
486038
|
539
|
-49
|
269
|
120
|
56
|
84
|
28
|
1.07
|
Notes to Accompany Table:
• Grid
coordinates are WGS84 Zone 29 North
• RC
intervals are sampled every 1m by dry riffle splitting or scoop to
provide a 1-3kg sample
• Diamond core are sampled every 1m by cutting the core in half
to provide a 2-4kg sample
• Cut-off grade for reporting of intercepts is >0.5g/t Au
with a maximum of 3m consecutive internal dilution included within
the intercept; only intercepts >=3m and >25 gram x metres are
reported
• Samples are analysed for gold by 30g fire assay fusion with
AAS instrument finish; over-range results are reanalysed by 30g
fire assay fusion with gravimetric finish
Tomboronkoto
Hole_ID
|
North (WGS)
|
East (WGS)
|
RL
(m)
|
Dip
|
Azi
(WGS)
|
EOH
(m)
|
From
(m)
|
To
(m)
|
Width
(m)
|
Au
(g/t)
|
TBDD0001
|
1416657
|
794102
|
103
|
-60
|
338
|
133
|
35
|
61
|
26
|
1.14
|
TBDD0001
|
|
|
|
|
|
|
66
|
84
|
18
|
2.15
|
TBDD0003
|
1416683
|
794000
|
104
|
-59
|
161
|
183
|
82
|
106
|
24
|
1.43
|
TBDD0004
|
1416580
|
793893
|
106
|
-61
|
339
|
173
|
55
|
102
|
47
|
2.75
|
TBDD0006
|
1416706
|
793948
|
104
|
-61
|
160
|
230
|
0
|
82
|
82
|
1.85
|
TBDD0007
|
1416677
|
793888
|
119
|
-61
|
159
|
208
|
0
|
77
|
77
|
1.34
|
TBDD0007
|
|
|
|
|
|
|
122
|
162
|
40
|
0.89
|
TBDD0008
|
1416662
|
793682
|
109
|
-60
|
158
|
271
|
244
|
270
|
26
|
2.36
|
TBDD0010
|
1416607
|
793859
|
106
|
-61
|
341
|
151.5
|
22
|
71
|
49
|
2.97
|
TBDD0011
|
1416552
|
793807
|
104
|
-61
|
341
|
170
|
49
|
106
|
57
|
3.81
|
TBDD0012
|
1416568
|
793688
|
105
|
-60
|
159
|
195
|
19
|
42
|
23
|
1.18
|
TBDD0012
|
|
|
|
|
|
|
146
|
164
|
18
|
3.03
|
TBDD0013
|
1416556
|
793667
|
105
|
-64
|
233
|
205
|
0
|
91
|
91
|
1.34
|
TBDD0014
|
1416557
|
793665
|
105
|
-50
|
232
|
209
|
0
|
57
|
57
|
1.39
|
TBDD0014
|
|
|
|
|
|
|
98
|
126
|
28
|
1.16
|
TBDD0015
|
1416557
|
793668
|
105
|
-61
|
160
|
187.5
|
0
|
38
|
38
|
1.44
|
TBDD0016
|
1416596
|
793750
|
108
|
-60
|
160
|
239
|
0
|
19
|
19
|
1.39
|
TBDD0016
|
|
|
|
|
|
|
60
|
132
|
72
|
1.38
|
TBDD0016
|
|
|
|
|
|
|
137
|
144
|
7
|
8.2
|
TBDD0017
|
1416675
|
793789
|
116
|
-60
|
162
|
271.5
|
133
|
166
|
33
|
1.25
|
TBDD0017
|
|
|
|
|
|
|
186
|
265
|
79
|
1.52
|
TBRC00056
|
1416631
|
794109
|
107
|
-90
|
0
|
160
|
59
|
85
|
26
|
1.03
|
TBRC00059
|
1416678
|
794038
|
106
|
-61
|
336
|
195
|
22
|
63
|
41
|
1.95
|
TBRC00059
|
|
|
|
|
|
|
148
|
158
|
10
|
7.94
|
TBRC00063
|
1416679
|
794094
|
101
|
-61
|
340
|
100
|
11
|
72
|
61
|
1.84
|
TBRC00064
|
1416712
|
794078
|
100
|
-60
|
340
|
78
|
14
|
49
|
35
|
1.44
|
TBRC00066
|
1416698
|
794059
|
102
|
-60
|
160
|
162
|
120
|
152
|
32
|
0.99
|
TBRC00069
|
1416704
|
793978
|
101
|
-62
|
160
|
138
|
8
|
67
|
59
|
2.29
|
TBRC00069A
|
1416700
|
793975
|
102
|
-62
|
160
|
200
|
25
|
64
|
39
|
2.43
|
TBRC00072
|
1416711
|
793921
|
106
|
-61
|
160
|
186
|
0
|
83
|
83
|
1.42
|
TBRC00074
|
1416630
|
793709
|
109
|
-61
|
160
|
230
|
208
|
229
|
21
|
3.73
|
TBRC00075
|
1416681
|
793931
|
105
|
-59
|
160
|
186
|
6
|
40
|
34
|
1.21
|
TBRC00075
|
|
|
|
|
|
|
44
|
65
|
21
|
1.42
|
TBRC00075
|
|
|
|
|
|
|
78
|
96
|
18
|
3.16
|
TBRC00075
|
|
|
|
|
|
|
101
|
126
|
25
|
1.37
|
TBRC00078
|
1416603
|
793648
|
106
|
-61
|
160
|
240
|
116
|
132
|
16
|
2.72
|
TBRC00078
|
|
|
|
|
|
|
224
|
239
|
15
|
3.95
|
TBRC00080
|
1416303
|
793436
|
99
|
-60
|
160
|
140
|
4
|
29
|
25
|
3.37
|
TBRC00090
|
1416324
|
793477
|
99
|
-60
|
160
|
151
|
6
|
50
|
44
|
1.94
|
TBRC00090
|
|
|
|
|
|
|
57
|
80
|
23
|
1.28
|
TBRC00091
|
1416574
|
793663
|
106
|
-61
|
160
|
168
|
0
|
108
|
108
|
1.58
|
TBRC00093
|
1416568
|
793760
|
104
|
-61
|
160
|
200
|
9
|
22
|
13
|
3.47
|
TBRC00097
|
1416555
|
793879
|
106
|
-62
|
340
|
190
|
91
|
130
|
39
|
1.67
|
TBRC00102
|
1416654
|
793914
|
105
|
-61
|
160
|
132
|
22
|
35
|
13
|
2.12
|
TBRC00102
|
|
|
|
|
|
|
39
|
132
|
93
|
2.32
|
TBRC00103
|
1416674
|
793911
|
100
|
-62
|
160
|
174
|
0
|
81
|
81
|
1.51
|
TBRC00103
|
|
|
|
|
|
|
122
|
151
|
29
|
0.97
|
TBRC00104
|
1416583
|
793869
|
110
|
-60
|
340
|
162
|
52
|
95
|
43
|
2.33
|
TBRC00105
|
1416562
|
793820
|
105
|
-60
|
340
|
81
|
50
|
81
|
31
|
1.3
|
TBRC00106
|
1416648
|
793898
|
105
|
-60
|
340
|
120
|
10
|
33
|
23
|
2.3
|
TBRC00107
|
1416648
|
793898
|
105
|
-60
|
160
|
180
|
57
|
124
|
67
|
2.32
|
TBRC00108
|
1416616
|
793904
|
106
|
-60
|
340
|
158
|
36
|
77
|
41
|
1.24
|
TBRC00109
|
1416596
|
793883
|
106
|
-60
|
345
|
180
|
56
|
80
|
24
|
1.41
|
TBRC00111
|
1416586
|
793791
|
104
|
-61
|
161
|
114
|
75
|
79
|
4
|
7.74
|
TBRC00112
|
1416634
|
793791
|
110
|
-60
|
342
|
182
|
12
|
45
|
33
|
1.45
|
TBRC00112
|
|
|
|
|
|
|
50
|
71
|
21
|
1.66
|
TBRC00113
|
1416665
|
793869
|
106
|
-60
|
342
|
116
|
4
|
23
|
19
|
1.78
|
TBRC00116
|
1416659
|
793815
|
111
|
-60
|
160
|
96
|
1
|
95
|
94
|
2.97
|
TBRC00117
|
1416615
|
793780
|
107
|
-61
|
160
|
114
|
10
|
30
|
20
|
2.6
|
Notes to Accompany Table:
• Grid
coordinates are WGS84 Zone 29 North
• RC
intervals are sampled every 1m by dry riffle splitting or scoop to
provide a 1-3kg sample
• Diamond core are sampled every 1m by cutting the core in half
to provide a 2-4kg sample
• Cut-off grade for reporting of intercepts is >0.5g/t Au
with a maximum of 3m consecutive internal dilution included within
the intercept; only intercepts >=3m and >25 gram x metres are
reported
• Samples are analysed for gold by 30g fire assay fusion with
AAS instrument finish; over-range results are reanalysed by 30g
fire assay fusion with gravimetric finish
Tomboronkoto
Section 1 Sampling Techniques and Data
CRITERIA
|
JORC CODE EXPLANATION
|
COMMENTARY
|
|
Sampling techniques
|
·
Nature and
quality of sampling (e.g. cut channels, random chips, or specific
specialised industry standard measurement tools appropriate to the
minerals under investigation, such as down hole gamma sondes, or
handheld XRF instruments, etc.). These examples should not be taken
as limiting the broad meaning of sampling.
·
Include
reference to measures taken to ensure sample representivity and the
appropriate calibration of any measurement tools or systems
used.
·
Aspects of the
determination of mineralisation that are Material to the Public
Report.
·
In cases where
'industry standard' work has been done this would be relatively
simple (e.g. 'reverse circulation drilling was used to obtain 1 m
samples from which 3 kg was pulverised to produce a 30 g charge for
fire assay'). In other cases more explanation may be required, such
as where there is coarse gold that has inherent sampling problems.
Unusual commodities or mineralisation types (e.g. submarine
nodules) may warrant disclosure of detailed
information.
|
Sampling has been by diamond drill coring and reverse circulation
chip.
Diamond core has been geologically
logged and sampled to geological contacts with nominal sample
lengths between 0.3m and 4.5m (most commonly 1m). Core selected for
assay is systematically cut lengthwise into half core by diamond
blade rock saw, numbered and bagged before dispatch to the
laboratory for analysis.
All core is photographed, wet and
dry.
Reverse circulation chips are
geologically logged and sampled on regular lengths of 1m. Chip
material selected for assay is systematically divided to a 1/8
proportion using a rotary splitter attached to the cyclone sample
recovery system, numbered and bagged before dispatch to the
laboratory for analysis.
|
Drilling techniques
|
·
Drill type (e.g.
core, reverse circulation, open-hole hammer, rotary air blast,
auger, Bangka, sonic, etc.) and details (e.g. core diameter, triple
or standard tube, depth of diamond tails, face-sampling bit or
other type, whether core is oriented and if so, by what method,
etc.).
|
Diamond core drilling with standard inner tubes. NTW diameter
(57.1 mm) to target depth where possible with some smaller NQ2
intervals as tails. Core is marked and oriented.
Reverse Circulation drilling with 4"
or 4.5" hammer and 4" rod string to target depth.
|
Drill sample recovery
|
·
Method of
recording and assessing core and chip sample recoveries and results
assessed.
·
Measures taken
to maximise sample recovery and ensure representative nature of the
samples.
·
Whether a
relationship exists between sample recovery and grade and whether
sample bias may have occurred due to preferential loss/gain of
fine/coarse material.
|
Diamond core recoveries are measured in the core trays and recorded
as recovered metres and recovered % as part of the geological
logging process.
RC recoveries are monitored by chip
sample weight recording. Sample weights have been analysed for
cyclicity with no relationship between sample weight and depth
noted.
|
Logging
|
·
Whether core and
chip samples have been geologically and geotechnically logged to a
level of detail to support appropriate Mineral Resource estimation,
mining studies and metallurgical studies.
·
Whether logging
is qualitative or quantitative in nature. Core (or costean,
channel, etc.) photography.
·
The total length
and percentage of the relevant intersections
logged.
|
Diamond core has been geologically and geotechnically logged to a
level of detail to support appropriate classification and reporting
of a Mineral Resource.
Reverse circulation chip samples
have been geologically logged to a level of detail to support
appropriate classification and reporting of a Mineral
Resource.
Total length of DD logged is
6,555.5m. Total length of RC logged is 23,218m.
|
Sub-sampling techniques and sample
preparation
|
·
If core, whether
cut or sawn and whether quarter, half or all core
taken.
·
If non-core,
whether riffled, tube sampled, rotary split, etc. and whether
sampled wet or dry.
·
For all sample
types, the nature, quality and appropriateness of the sample
preparation technique.
·
Quality control
procedures adopted for all sub-sampling stages to maximise
representivity of samples.
·
Measures taken
to ensure that the sampling is representative of the in situ
material collected, including for instance results for field
duplicate/second-half sampling.
·
Whether sample
sizes are appropriate to the grain size of the material being
sampled.
|
Historic core has been systematically cut lengthwise into half core
with a diamond saw.
RC samples representing a 1/8 split
are taken directly from the rig mounted cyclone by rotary splitter,
sample weight is recorded, sample is bagged in pre numbered plastic
and sample tickets are inserted and bag is sealed for transport to
preparation facility.
Generally, one of each of the two
control samples (blank or CRM standard) is inserted into the sample
stream every tenth sample. Over the 2018 deep diamond programme. An
industry standard, documented process of sample mark-up, core
splitting, bagging and ticketing and recording is in place at the
Mako site. The laboratories sample preparation followed a standard
documented process flow with whole sample crushing (better than 70%
passing 2mm) followed by a 1kg riffle split for pulverisation to 75
micron (better than 85% pass).
Master pulps of 250g were split and
placed in airtight, sealed bags and sent by courier to the assaying
laboratory for analysis.
Sample size of 2-6kg is appropriate
for the grain size of material.
|
Quality of assay data and laboratory tests
|
·
The nature,
quality and appropriateness of the assaying and laboratory
procedures used and whether the technique is considered partial or
total.
·
For geophysical
tools, spectrometers, handheld XRF instruments, etc., the
parameters used in determining the analysis including instrument
make and model, reading times, calibrations factors applied and
their derivation, etc.
·
Nature of
quality control procedures adopted (e.g. standards, blanks,
duplicates, external laboratory checks) and whether acceptable
levels of accuracy (i.e. lack of bias) and precision have been
established.
|
Au assays are determined by fire assay with AAS finish. Laboratory
and assay procedures are appropriate for Mineral Resource
estimation.
QAQC consisted of standards, blanks
and laboratory duplicates (both coarse and pulp). The QAQC sample
results showed acceptable levels of accuracy and
precision.
The assay data is considered to be
suitable for Mineral Resource estimation.
|
Verification of sampling and assaying
|
·
The verification
of significant intersections by either independent or alternative
company personnel.
·
The use of
twinned holes.
·
Documentation of
primary data, data entry procedures, data verification, data
storage (physical and electronic) protocols.
·
Discuss any
adjustment to assay data.
|
All aspects of the core sampling, assay procedures and QA/QC
program have been reviewed and were judged to be suitable for use
in the estimation of Mineral Resources.
Drill hole assay result data has
been checked against the original hardcopy laboratory assay reports
for a representative number of holes.
Below detection limit values
(negatives) have been replaced by background values.
Un-sampled intervals have been
retained as un-sampled (null or blank). All of these intervals
occur within the waste domain and have no material impact on the
estimate.
|
Location of data points
|
·
Accuracy and
quality of surveys used to locate drill holes (collar and down-hole
surveys), trenches, mine workings and other locations used in
Mineral Resource estimation.
·
Specification of
the grid system used.
·
Quality and
adequacy of topographic control.
|
Drill holes have been surveyed by Mako Mine staff surveyors using a
Leica GS14, GS15, and GS18 dGPS.
Downhole surveys were undertaken by
the drilling contractor using a Reflex DeviGyro tool with a reading
taken every 3m downhole.
Grid system is based on the UTM28N
grid on the WGS84 ellipsoid. Survey heights are based on PRS097
(with independent checks on AusPos) and are orthometric (i.e.
msl).
A topographic surface with 1m
resolution has been generated from a 2022 Lidar survey of the Tombo
area.
|
Data spacing and distribution
|
·
Data spacing for
reporting of Exploration Results.
·
Whether the data
spacing and distribution is sufficient to establish the degree of
geological and grade continuity appropriate for the Mineral
Resource and Ore Reserve estimation procedure(s) and
classifications applied.
·
Whether sample
compositing has been applied.
|
Data spacing is Generally 25x25m, with a gap underneath National
Highway 7, which runs across the western portion of the deposit.
This spacing is adequate to determine the geological and grade
continuity for reporting of a Mineral Resources.
Drill samples were composited to 1m
for use in the estimate.
|
Orientation of data in relation to geological
structure
|
·
Whether the
orientation of sampling achieves unbiased sampling of possible
structures and the extent to which this is known, considering the
deposit type.
·
If the
relationship between the drilling orientation and the orientation
of key mineralised structures is considered to have introduced a
sampling bias, this should be assessed and reported if
material.
|
Geological structures are interpreted to be steeply-dipping to the
south-southeast. Drilling intersects structures from the north and
south sides, generally dipping -60⁰ below horizontal, with azimuths
either at approximately 340⁰ or 160⁰. All drilling would ideally be
targeted from the south, but the presence of the village of
Tomboronkoto largely precludes this.
Drilling primarily targeted the
granodiorite unit which contained the most significant
mineralisation and dipped at about 70⁰ to
the south-southeast. The drilling orientation is adequate for a non-biased
assessment of the orebody with respect to interpreted structures
and interpreted controls on mineralisation.
|
Sample security
|
·
The measures
taken to ensure sample security.
|
Labelling and submission of samples complies with industry
standard.
|
Audits or reviews
|
·
The results of
any audits or reviews of sampling techniques and
data.
|
An independent audit of the sample preparation laboratory has been
undertaken in 2018 (Fis, 2018) found no material issues with the
sampling methods or data.
The competent person audited the
sample preparation laboratory in 2024. No material issues were
found.
|
|
|
|
|
|
Section 2 Reporting of Exploration Results
CRITERIA
|
JORC CODE EXPLANATION
|
COMMENTARY
|
|
Mineral tenement and land tenure status
|
·
Type, reference
name/number, location and ownership including agreements or
material issues with third parties such as joint ventures,
partnerships, overriding royalties, native title interests,
historical sites, wilderness or national park and environmental
settings.
·
The security of
the tenure held at the time of reporting along with any known
impediments to obtaining a licence to operate in the
area.
|
The Tomboronkoto Permit is held by Ardimines SARL. Toro Gold
Limited is in a joint Venture with Ardimines with Toro being
the manager and sole funder of the joint Venture. Toro Gold
Limited is a company controlled by resolute Limited. The permit is
in good standing.
|
Exploration done by other parties
|
·
Acknowledgment
and appraisal of exploration by other parties.
|
Past exploration has been performed by Ashanti Gold and Randgold
Resources on a previously held Research Permit which was
relinquished prior to being held by Ardimines SARL. Randgold
had undertaken soil geochemistry, surface mapping and drilling on
the entire Research Permit. Regional auger drilling
identified gold anomalism which Ashanti Gold followed up with
Diamond and Reverse Circulation drilling and trenching on the
Tomboronkoto prospect. Subsequently Randgold undertook further DD
drilling and trenching.
|
Geology
|
·
Deposit type,
geological setting and style of mineralisation.
|
Mineralisation is currently interpreted to be within a shear in the
granodiorite unit. Intensity of gold mineralisation appears to
correlate with the intensity of pyrite development and exhibits
good lateral and vertical continuity through the mineralised
zone.
Mineralisation has a relatively
simple geometry comprising a zone that varies from 30 to 60m in
width, along the 1,700m strike length drilled to date. The zone
dips approximately 70⁰ to the south-southeast.
|
Drill hole Information
|
·
A summary of all
information material to the understanding of the exploration
results including a tabulation of the following information for all
Material drill holes:
o easting and northing of the
drill hole collar
o elevation or RL (Reduced
Level - elevation above sea level in metres) of the drill hole
collar
o dip and azimuth of the
hole
o down hole length and
interception depth
o Whole
length.
·
If the exclusion
of this information is justified on the basis that the information
is not Material and this exclusion does not detract from the
understanding of the report, the Competent Person should clearly
explain why this is
the case.
|
Easting, Northing and RL of the drill hole collars are based on the
UTM28N grid on the WGS84 ellipsoid. Survey heights are based on
PRS097 (with independent checks on AusPos) and are orthometric
(i.e. msl).
The MRE has used drill hole collar
RL derived from the topographical surface.
Dip is the inclination of the hole
from the horizontal. For example, a vertically down drilled hole
from the surface is -90°. Azimuth is reported in degrees as the
grid direction toward which the hole is drilled.
Down hole length of the hole is the
distance from the surface to the end of the hole, as measured along
the drill trace. Intersection depth is the distance down the hole
as measured along the drill trace. Intersection width is the
downhole distance of an intersection as measured along the drill
trace.
Drill hole length is the distance
from the surface to the end of the hole, as measured along the
drill trace.
|
Data aggregation methods
|
·
In reporting
Exploration Results, weighting averaging techniques, maximum and/or
minimum grade truncations (e.g. cutting of high grades) and cut-off
grades are usually Material and should be stated.
·
Where aggregate
intercepts incorporate short lengths of high grade results and
longer lengths of low grade results, the procedure used for such
aggregation should be stated and some typical examples of such
aggregations should be shown in detail.
·
The assumptions
used for any reporting of metal equivalent values should be clearly
stated.
|
Drillholes have been composited
to 1m intervals using Leapfrog Geo 2023.2.1 with residual lengths
distributed evenly across all composites within the domain. There
are no residual samples.
The influence of extreme gold assays
has been limited by top-cutting assays across all domains. Top-cuts
have been determined using a combination of log probability, log
histogram, and mean variance plots. Top-cuts have been reviewed and
applied to the composites on a domain-by-domain basis.
The assay intervals are reported as
down hole length as the true width variable is not
known.
Gold assays are rounded to two
decimal places.
No metal equivalent reporting is
used or applied.
|
Relationship between mineralisation widths and intercept
lengths
|
·
These
relationships are particularly important in the reporting of
Exploration Results.
·
If the geometry
of the mineralisation with respect to the drill hole angle is
known, its nature should be reported.
·
If it is not
known and only the down hole lengths are reported, there should be
a clear statement to this effect (e.g. 'down hole length, true
width not known').
|
The intersection width is measured down the hole trace and may not
be the true width.
All drill results are downhole
intervals only due to the variable orientation of the
mineralisation.
|
Diagrams
|
·
Appropriate maps
and sections (with scales) and tabulations of intercepts should be
included for any significant discovery being reported These should
include, but not be limited to a plan view of drill hole collar
locations and appropriate sectional views.
|
A plan view is contained within this document. New cross-sectional
interpretations are included.
|
Balanced reporting
|
·
Where
comprehensive reporting of all Exploration Results is not
practicable, representative reporting of both low and high grades
and/or widths should be practiced to avoid misleading reporting of
Exploration Results.
|
Diamond and RC drill holes forming the basis of the Mineral
Resource estimate have been reported previously. Additional
drilling has informed the 2024 estimate.
|
Other substantive exploration data
|
·
Other
exploration data, if meaningful and material, should be reported
including (but not limited to): geological observations;
geophysical survey results; geochemical survey results; bulk
samples - size and method of treatment; metallurgical test results;
bulk density, groundwater, geotechnical and rock characteristics;
potential deleterious or contaminating substances.
|
No other exploration data is considered meaningful and material to
this document.
|
Further work
|
·
The nature and
scale of planned further work (e.g. tests for lateral extensions or
depth extensions or large-scale step-out
drilling).
·
Diagrams clearly
highlighting the areas of possible extensions, including the main
geological interpretations and future drilling areas, provided this
information is not commercially sensitive.
|
Future exploration may involve the drilling of more drillholes,
both diamond core and reverse circulation, to further extend the
mineralised zones and to collect additional detailed data on known
mineralized zones. Geophysical exploration is also planned as part
of the future exploration of the permit.
|
|
|
|
|
|
Section 3 Estimation and Reporting of Mineral
Resources
CRITERIA
|
JORC CODE
EXPLANATION
|
COMMENTARY
|
|
Database
integrity
|
·
Measures taken to ensure that data has not been corrupted by, for example, transcription or keying errors, between its initial
collection and its use for Mineral Resource estimation
purposes.
·
Data
validation procedures used.
|
Data
has been compiled into a relational SQL database; the setup of this
database precludes the loading of data which do not meet the
required validation protocols. The data is managed using DataShed©
drill hole management software using SQL database techniques.
Validation checks are conducted using SQL and DataShed© relational
database standards. Data has also been checked against original
hard copies for 100% of the data, and where possible, loaded from
original data sources.
Resolute completed the following
basic validation checks on the data
supplied prior to resource estimation:
· Drill
holes with overlapping sample intervals.
· Sample
intervals with no assay data or duplicate records.
· Assay
grade ranges.
· Collar
coordinate ranges.
· Valid
hole orientation data.
There are no significant issues
identified with the data.
|
Site visits
|
·
Comment on any
site visits undertaken by the Competent Person and the outcome of
those visits.
·
If no site
visits have been undertaken indicate why this
is the case.
|
Mr
Patrick Smillie, a full time employee of Resolute Mining Limited
and a Member of the Society for Mining, Metallurgy, and Exploration
is the Competent Person, who visited site in June, 2024.
|
Geological interpretation
|
·
Confidence in
(or conversely, the uncertainty of) the geological interpretation
of the mineral deposit.
·
Nature of the
data used and of any assumptions made.
·
The effect, if
any, of alternative interpretations on Mineral Resource
estimation.
·
The use of
geology in guiding and controlling Mineral Resource
estimation.
·
The factors
affecting continuity both of grade and geology.
|
The digital database used for the interpretation included logged
intervals for the key granodiorite unit. There is a moderate level
of confidence in the interpretation of the mineralised shear
zoneprimarily due to the relatively wide-spaced drilling.
Additionally Resolute's drilling program was entirely RC, though
historic core has been reviewed and logged.
The mineralised volume has been
constructed using nested Leapfrog Indicator wireframes at lower
cut-offs of 0.2 g/t Au and 0.75 g/t Au. The
overall shape of the mineralised unit has been guided by a
sectional interpretation of the trend of mineralisation within the
mineralised shear.
The factors affecting continuity
both of grade and geology are most likely to be associated with
structural controls and local complexity, the knowledge of which is
limited with the current spacing of information. The broad approach
to the mineralisation modelling is an attempt to model an unbiased
interpretation.
|
Dimensions
|
·
The extent and
variability of the Mineral Resource expressed as length (along
strike or otherwise), plan width, and depth below surface to the
upper and lower limits of the Mineral Resource.
|
Gold mineralisation varies from approximately 10 to 50m in
thickness along the approximately 750m strike length of defined
mineralisation. Mineralisation dips at approximately 70⁰ to the SSE
and is defined to approximately 150m vertical depth. The deposit
remains open at depth and to the west.
|
Estimation and modelling techniques
|
·
The nature and
appropriateness of the estimation technique(s) applied and key
assumptions, including treatment of extreme grade values,
domaining, interpolation parameters and maximum distance of
extrapolation from data points. If a computer assisted estimation
method was chosen include a description of computer software and
parameters used.
·
The availability
of check estimates, previous estimates and/or mine production
records and whether the Mineral Resource estimate takes appropriate
account of such data.
·
The assumptions
made regarding recovery of by- products.
·
Estimation of
deleterious elements or other non-grade variables of economic
significance (e.g. sulphur for acid mine drainage
characterization).
·
In the case of
block model interpolation, the block size in relation to the
average sample spacing and the search employed.
·
In the case of
block model interpolation, the block size in relation to the
average sample spacing and the search employed.
·
Any assumptions
behind modelling of selective mining units.
·
Any assumptions
about correlation between variables.
·
Description of
how the geological interpretation was used to control the resource
estimates.
·
Discussion of
basis for using or not using grade cutting or
capping.
·
The process of
validation, the checking process used, the comparison of model data
to drill hole data, and use of reconciliation data if
available.
|
Estimation of gold grade has been completed using Ordinary Kriging
(OK). Mineralisation has been constrained using wireframes
constructed using nested Leapfrog Indicator wireframes constructed
within the host granodiorite unit. These wireframes have been used
to define domain codes for estimation. Drillholes have been flagged
with the domain code and composited using the domain code to
segregate the data.
Domain boundary analysis has been
undertaken with hard boundaries used for all domains.
Drillholes have been composited to
1m intervals using Leapfrog Geo 2023.2.1 with residual lengths
distributed evenly across all composites within the domain. There
are no residual samples.
The influence of extreme gold assays
has been limited by top-cutting assays across all domains. Top-cuts
have been determined using a combination of log probability, log
histogram, and mean variance plots. Top-cuts have been reviewed and
applied to the composites on a domain-by-domain basis.
Variography has been undertaken on a
domain-by-domain basis in Datamine Supervisor v.8.14.3.3 using
top-cut values.
Drillhole data spacing is 25m x 25m
across the deposit, with a small gap of 50x50m spaced data under
National Highway 7 which runs across the western portion of the
deposit.
The block model parent block size is
10m (X) by 10m (Y) by 5m (Z) with up to 16 sub-blocks per parent
block in the X and Y directions, and up to 8 sub-blocks per parent
block in the Z direction. Sub-blocks have been estimated at the
parent block scale. Block size is considered appropriate for the
drillhole spacing throughout the deposit.
Grade estimation has been completed
in three passes:
Ø Pass
1 estimation has been undertaken using a minimum of 4 and maximum
of 25 sample composites (determined using Datamine Supervisor
v.8.14 KNA tool) into a search ellipsoid with dimensions equal to
half the variogram range of the domain.
Ø Pass
2 estimation has been undertaken with the same minimum/maximum
samples as Pass 1 into a search ellipsoid twice the first
pass.
Ø Pass
3 estimation has been undertaken with a minimum of 2 samples, and
the same maximum number of samples as the first two passes into a
search ellipsoid twice the second pass
Ø A
maximum of three samples per drillhole has been used in the first
two passes, with no limits set on the third pass..
The mineral resource estimate has
been validated using visual validation tools, mean grade
comparisons between the block model and declustered composite grade
means, and swath plots comparing the input composite grades and the
estimated block model grades by Northing, Easting, and
RL.
Leapfrog Geo v2023.2.1 and Datamine
Supervisor v8.14.3.3 software have been used for
estimation.
No by-product recoveries were
considered.
|
Moisture
|
·
Whether the
tonnages are estimated on a dry basis or with natural moisture, and
the method of determination of the moisture content.
|
Moisture was not considered in the density assignment.
|
Cut-off parameters
|
·
The basis of the
adopted cut-off grade(s) or quality
parameters applied.
|
A nominal lower cut-off grade of 0.2g/t Au was used to define the
mineralised domains to encompass the complete mineralised
distribution and produce a model that reduces the risk of
conditional bias that could be introduced where the constraining
interpretation and data selection is based on a significantly
higher grade than the natural geological grade
cut-off.
The cut-off grade for reporting
(above 0.5g/t Au and above 1.0 g/t Au) was used in line with the
previous resource reporting at the nearby Mako deposit
|
Mining factors or assumptions
|
·
Assumptions made
regarding possible mining methods, minimum mining dimensions and
internal (or, if applicable, external) mining dilution.
It is always necessary as part of the process of determining
reasonable prospects for eventual economic extraction to consider
potential mining methods, but the assumptions made regarding mining
methods and parameters when estimating Mineral Resources may not
always be rigorous. Where this is the case, this should be reported
with an explanation of the basis of the mining assumptions
made.
|
The shallow occurrence of the mineralisation indicates that open
pit mining is appropriate, in line with other deposits in the
area.
The estimation methodology used results in an amount of edge
dilution being incorporated into the blocks of the model. No
account of mining loss has been incorporated.
|
Metallurgical factors or assumptions
|
·
The basis for
assumptions or predictions regarding metallurgical amenability. It
is always necessary as part of the process of determining
reasonable prospects for eventual economic extraction to consider
potential metallurgical methods, but the assumptions regarding
metallurgical treatment processes and parameters made when
reporting Mineral Resources may not always be rigorous. Where this
is the case, this should be reported with an explanation of the
basis of the metallurgical assumptions made.
|
No specific assumptions were made regarding metallurgical factors
for this estimate.
Metallurgy is assumed to be similar
to the nearby Mako deposit.
|
Environmental factors or assumptions
|
·
Assumptions made
regarding possible waste and process residue disposal options. It
is always necessary as part of the process of determining
reasonable prospects for eventual economic extraction to consider
the potential environmental impacts of the mining and processing
operation. While at this stage the determination of potential
environmental impacts, particularly for a green fields project, may
not always be well advanced, the status of early consideration of
these potential environmental impacts should be reported. Where
these aspects have not been considered this should be reported with
an explanation of the environmental assumptions made.
|
In order for mining to occur, the nearby village of Tomboronkoto
would need to be relocated and a portion of National Highway 7
rerouted.
|
Bulk density
|
·
Whether assumed
or determined. If assumed, the basis for the assumptions. If
determined, the method used, whether wet or dry, the frequency of
the measurements, the nature, size and representativeness of the
samples.
·
The bulk density
for bulk material must have been measured by methods that
adequately account for void spaces (vugs, porosity, etc), moisture
and differences between rock and alteration zones within the
deposit.
·
Discuss
assumptions for bulk density estimates used in the evaluation
process of the different materials.
|
Specific gravity values for the Tombo Prospect have been measured
based on the Archimedean Principle using the immersion method for
individual core samples. A total of 1,406 density measurements were
available for use. This data has been used as the basis of the
block model bulk density.
No relationship between density and
gold content could be established.
A default bulk density of
1.74t/m3 was assigned to oxide rocks.
A default bulk density of
2.31t/m3 was assigned to transitional rock.
A default bulk density of
2.71t/m3 was assigned to fresh rock.
|
Classification
|
·
The basis for
the classification of the Mineral Resources into varying confidence
categories.
·
Whether
appropriate account has been taken of all relevant factors (i.e.
relative confidence in tonnage/grade estimations, reliability of
input data, confidence in continuity of geology
and metal values, quality, quantity and distribution of the
data).
·
Whether the
result appropriately reflects the Competent Person's view of the
deposit.
|
The classification is based on the confidence in the continuity of
geology and mineralisation and quality/confidence in the estimation
and quality of assay data and bulk density data.
The Indicated portion of the
Resource was defined within a wireframe constructed around areas
populated in the first two estimation passes, where drilling
density is less than or equal to 25x25m, and Kriging efficiency is
generally >= 0.6.
Mineralisation not classified as
Indicated has been classified as Inferred.
The Mineral Resource estimate
appropriately reflects the Competent Person's view of the
deposit.
|
Audits or reviews
|
·
The results of
any audits or reviews of Mineral
·
Resource
estimates.
|
No external reviews have been completed.
|
Discussion of relative accuracy/ confidence
|
·
Where
appropriate a statement of the relative accuracy and confidence
level in the Mineral Resource estimate using an approach or
procedure deemed appropriate by the Competent Person. For example,
the application of statistical or geostatistical procedures to
quantify the relative accuracy of the resource within stated
confidence limits, or, if such an approach is not deemed
appropriate, a qualitative discussion of the factors that could
affect the relative accuracy and confidence of the
estimate.
·
The statement
should specify whether it relates to global or local estimates,
and, if local, state the relevant tonnages, which should be
relevant to technical and economic evaluation. Documentation should
include assumptions made and the procedures used.
·
These statements
of relative accuracy and confidence of the estimate should be
compared with production data, where available.
|
The Mineral Resource Estimate has been classified based on the
quality of the data collected, the density of the data, the
confidence of the geologic and mineralisation models, and the grade
estimation quality. No relative statistical or geostatistical
confidence or risk measure has been applied.
The relative accuracy of the Mineral
Resource Estimate is reflected in the reporting of Indicated and
Inferred resource categories as defined by the JORC 2012 code
guidelines.
No production data is available for
comparison.
|
|
|
|
|
|
Mansala
Section 1 Sampling Techniques and Data
CRITERIA
|
JORC CODE EXPLANATION
|
COMMENTARY
|
|
Sampling techniques
|
·
Nature and
quality of sampling (e.g. cut channels, random chips, or specific
specialised industry standard measurement tools appropriate to the
minerals under investigation, such as down hole gamma sondes, or
handheld XRF instruments, etc.). These examples should not be taken
as limiting the broad meaning of sampling.
·
Include
reference to measures taken to ensure sample representivity and the
appropriate calibration of any measurement tools or systems
used.
·
Aspects of the
determination of mineralisation that are Material to the Public
Report.
·
In cases where
'industry standard' work has been done this would be relatively
simple (e.g. 'reverse circulation drilling was used to obtain 1 m
samples from which 3 kg was pulverised to produce a 30 g charge for
fire assay'). In other cases more explanation may be required, such
as where there is coarse gold that has inherent sampling problems.
Unusual commodities or mineralisation types (e.g. submarine
nodules) may warrant disclosure of detailed
information.
|
Sampling has been by diamond drill coring and reverse circulation
chip.
Diamond core has been geologically
logged to geological contacts and sampled at 1m intervals. Core
selected for assay is systematically cut lengthwise into half core
by diamond blade rock saw, numbered and bagged before dispatch to
the laboratory for analysis.
All core is photographed, wet and
dry.
Reverse circulation chips are
geologically logged and sampled on regular lengths of 1m. Chip
material selected for assay is systematically divided to a 1/8
proportion using a riffle splitter after the sample is recovered
from the cyclone. Samples are numbered and bagged before dispatch
to the laboratory for analysis.
|
Drilling techniques
|
·
Drill type (e.g.
core, reverse circulation, open-hole hammer, rotary air blast,
auger, Bangka, sonic, etc.) and details (e.g. core diameter, triple
or standard tube, depth of diamond tails, face-sampling bit or
other type, whether core is oriented and if so, by what method,
etc.).
|
Diamond core drilling with standard inner tubes. NTW diameter
(57.1 mm) to target depth where possible with some smaller NQ2
intervals as tails. Core is marked and oriented.
Reverse Circulation drilling with 4"
or 4.5" hammer and 4" rod string to target depth.
|
Drill sample recovery
|
·
Method of
recording and assessing core and chip sample recoveries and results
assessed.
·
Measures taken
to maximise sample recovery and ensure representative nature of the
samples.
·
Whether a
relationship exists between sample recovery and grade and whether
sample bias may have occurred due to preferential loss/gain of
fine/coarse material.
|
Diamond core recoveries are measured in the core trays and recorded
as recovered metres and recovered % as part of the geological
logging process.
RC recoveries are monitored by chip
sample weight recording. Sample weights have been analysed for
cyclicity with no relationship between sample weight and depth
noted.
|
Logging
|
·
Whether core and
chip samples have been geologically and geotechnically logged to a
level of detail to support appropriate Mineral Resource estimation,
mining studies and metallurgical studies.
·
Whether logging
is qualitative or quantitative in nature. Core (or costean,
channel, etc.) photography.
·
The total length
and percentage of the relevant intersections
logged.
|
Diamond core has been geologically and geotechnically logged to a
level of detail to support appropriate classification and reporting
of a Mineral Resource.
Reverse circulation chip samples
have been geologically logged to a level of detail to support
appropriate classification and reporting of a Mineral
Resource.
Total length of DD logged is 2,211m.
Total length of RC logged is 11,343m.
|
Sub-sampling techniques and sample
preparation
|
·
If core, whether
cut or sawn and whether quarter, half or all core
taken.
·
If non-core,
whether riffled, tube sampled, rotary split, etc. and whether
sampled wet or dry.
·
For all sample
types, the nature, quality and appropriateness of the sample
preparation technique.
·
Quality control
procedures adopted for all sub-sampling stages to maximise
representivity of samples.
·
Measures taken
to ensure that the sampling is representative of the in situ
material collected, including for instance results for field
duplicate/second-half sampling.
·
Whether sample
sizes are appropriate to the grain size of the material being
sampled.
|
Core has been systematically cut lengthwise into half core with a
diamond saw.
The main RC sample is recovered from
the cyclone, with a 1/8 sample taken with a riffle splitter after
weighing. Sub-sample weight is recorded, sample is bagged in pre
numbered plastic and sample tickets are inserted and bag is sealed
for transport to preparation facility.
Blanks or certified reference
material are inserted one in twenty samples. An industry standard,
documented process of sample mark-up, core splitting, bagging and
ticketing and recording is in place. The laboratories sample
preparation followed a standard documented process flow with whole
sample crushing (better than 70% passing 2mm) followed by a 1kg
riffle split for pulverisation to 75 micron (better than 85%
pass).
Master pulps of 250g were split and
placed in airtight, sealed bags and sent by courier to the assaying
laboratory for analysis.
Sample size of 2-6kg is appropriate
for the grain size of material.
|
Quality of assay data and laboratory tests
|
·
The nature,
quality and appropriateness of the assaying and laboratory
procedures used and whether the technique is considered partial or
total.
·
For geophysical
tools, spectrometers, handheld XRF instruments, etc., the
parameters used in determining the analysis including instrument
make and model, reading times, calibrations factors applied and
their derivation, etc.
·
Nature of
quality control procedures adopted (e.g. standards, blanks,
duplicates, external laboratory checks) and whether acceptable
levels of accuracy (i.e. lack of bias) and precision have been
established.
|
Au assays are determined by fire assay with AAS finish. Laboratory
and assay procedures are appropriate for Mineral Resource
estimation.
QAQC consisted of standards, blanks
and laboratory duplicates (both coarse and pulp). The QAQC sample
results showed acceptable levels of accuracy and
precision.
The assay data is considered to be
suitable for Mineral Resource estimation.
|
Verification of sampling and assaying
|
·
The verification
of significant intersections by either independent or alternative
company personnel.
·
The use of
twinned holes.
·
Documentation of
primary data, data entry procedures, data verification, data
storage (physical and electronic) protocols.
·
Discuss any
adjustment to assay data.
|
All aspects of the core sampling, assay procedures and QA/QC
program have been reviewed and were judged to be suitable for use
in the estimation of Mineral Resources.
Drill hole assay result data has
been checked against the original hardcopy laboratory assay reports
for a representative number of holes.
Below detection limit values
(negatives) have been replaced with half of detection
limit.
No intervals have been left
unsampled.
|
Location of data points
|
·
Accuracy and
quality of surveys used to locate drill holes (collar and down-hole
surveys), trenches, mine workings and other locations used in
Mineral Resource estimation.
·
Specification of
the grid system used.
·
Quality and
adequacy of topographic control.
|
Drillholes have been surveyed by a contract differential GPS (dGPS)
surveyor to +/-3cm accuracy.
Downhole surveys have been completed
with a vairiety of different tools, single-shot, multi-shot, and
north-seeking gyro tools have been used at intervals ranging from
10 to 30m downhole.
Grid system is based on the UTM28N
grid on the WGS84 ellipsoid. Survey heights are based on PRS097
(with independent checks on AusPos) and are orthometric (i.e.
msl).
A topographic surface with
approximately 1m resolution has been constructed using regional 5m
contours refined with dGPS survey lines collected during a 2023 IP
survey as well as dGPS collar positions.
|
Data spacing and distribution
|
·
Data spacing for
reporting of Exploration Results.
·
Whether the data
spacing and distribution is sufficient to establish the degree of
geological and grade continuity appropriate for the Mineral
Resource and Ore Reserve estimation procedure(s) and
classifications applied.
·
Whether sample
compositing has been applied.
|
Data spacing is a reasonably consistent 40m (X) by 100m (Y) across
the deposit. This spacing is adequate to determine the geological
and grade continuity for reporting of an Inferred Mineral
Resources.
Drill samples were composited to 1m
for use in the estimate with residual lengths equally distributed
across previous intervals..
|
Orientation of data in relation to geological
structure
|
·
Whether the
orientation of sampling achieves unbiased sampling of possible
structures and the extent to which this is known, considering the
deposit type.
·
If the
relationship between the drilling orientation and the orientation
of key mineralised structures is considered to have introduced a
sampling bias, this should be assessed and reported if
material.
|
Geological structures are interpreted to be dipping near vertically
and trending north-northeast/south-soutwest. Drilling intersects
structures from the east side, generally dipping -85⁰ below
horizontal, with azimuths at approximately 10⁰ .
Drilling primarily targeted the
sedimentary unit which contained the most significant
mineralisation and dipped at about 85⁰ to
the south. The
drilling orientation is adequate for a non-biased assessment of the
orebody with respect to interpreted structures and interpreted
controls on mineralisation.
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Sample security
|
·
The measures
taken to ensure sample security.
|
Labelling and submission of samples complies with industry
standard.
|
Audits or reviews
|
·
The results of
any audits or reviews of sampling techniques and
data.
|
An independent audit of the sample preparation laboratory has been
undertaken in 2018 (Fis, 2018) found no material issues with the
sampling methods or data.
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Section 2 Reporting of Exploration Results
CRITERIA
|
JORC CODE EXPLANATION
|
COMMENTARY
|
|
Mineral tenement and land tenure status
|
·
Type, reference
name/number, location and ownership including agreements or
material issues with third parties such as joint ventures,
partnerships, overriding royalties, native title interests,
historical sites, wilderness or national park and environmental
settings.
·
The security of
the tenure held at the time of reporting along with any known
impediments to obtaining a licence to operate in the
area.
|
To date no exploration results have been reported on an exploration
permit, owned 100% by Resolute.
The permit is currently under
renewal.
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Exploration done by other parties
|
·
Acknowledgment
and appraisal of exploration by other parties.
|
No exploration was undertaken on the Mansala prospect prior to
Resolute's acquisition of the property.
|
Geology
|
·
Deposit type,
geological setting and style of mineralisation.
|
Mineralisation is currently interpreted to be steeply dipping
within the sedimentary unit. Intensity of gold mineralisation
appears to correlate with the intensity of arsenopyrite and quartz
vein development and exhibits good lateral and vertical continuity
through the mineralised zone.
Mineralisation has a relatively
simple geometry comprising a zone approximately 40m in width, along
the 1,000m strike length drilled to date. The zone dips near
vertically.
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Drill hole Information
|
·
A summary of all
information material to the understanding of the exploration
results including a tabulation of the following information for all
Material drill holes:
o easting and northing of the
drill hole collar
o elevation or RL (Reduced
Level - elevation above sea level in metres) of the drill hole
collar
o dip and azimuth of the
hole
o down hole length and
interception depth
o Whole
length.
·
If the exclusion
of this information is justified on the basis that the information
is not Material and this exclusion does not detract from the
understanding of the report, the Competent Person should clearly
explain why this is
the case.
|
Easting, Northing and RL of the drill hole collars are based on the
UTM28N grid on the WGS84 ellipsoid. Survey heights are based on
PRS097 and are orthometric (i.e. msl).
Dip is the inclination of the hole
from the horizontal. For example, a vertically down drilled hole
from the surface is -90°. Azimuth is reported in degrees as the
grid direction toward which the hole is drilled.
Down hole length of the hole is the
distance from the surface to the end of the hole, as measured along
the drill trace. Intersection depth is the distance down the hole
as measured along the drill trace. Intersection width is the
downhole distance of an intersection as measured along the drill
trace.
Drill hole length is the distance
from the surface to the end of the hole, as measured along the
drill trace.
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Data aggregation methods
|
·
In reporting
Exploration Results, weighting averaging techniques, maximum and/or
minimum grade truncations (e.g. cutting of high grades) and cut-off
grades are usually Material and should be stated.
·
Where aggregate
intercepts incorporate short lengths of high grade results and
longer lengths of low grade results, the procedure used for such
aggregation should be stated and some typical examples of such
aggregations should be shown in detail.
·
The assumptions
used for any reporting of metal equivalent values should be clearly
stated.
|
Drillholes have been composited
to 1m intervals using Leapfrog Geo 2023.2.3 with residual lengths
distributed evenly across all composites within the domain. There
are no residual samples.
The influence of extreme gold assays
has been limited by top-cutting assays across all domains. Top-cuts
have been determined using a combination of log probability, log
histogram, and mean variance plots. Top-cuts have been reviewed and
applied to the composites on a domain-by-domain basis.
The assay intervals are reported as
down hole length as the true width variable is not
known.
Gold assays are rounded to two
decimal places.
No metal equivalent reporting is
used or applied.
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Relationship between mineralisation widths and intercept
lengths
|
·
These
relationships are particularly important in the reporting of
Exploration Results.
·
If the geometry
of the mineralisation with respect to the drill hole angle is
known, its nature should be reported.
·
If it is not
known and only the down hole lengths are reported, there should be
a clear statement to this effect (e.g. 'down hole length, true
width not known').
|
The intersection width is measured down the hole trace and may not
be the true width.
All drill results are downhole
intervals only due to the variable orientation of the
mineralisation.
|
Diagrams
|
·
Appropriate maps
and sections (with scales) and tabulations of intercepts should be
included for any significant discovery being reported These should
include, but not be limited to a plan view of drill hole collar
locations and appropriate sectional views.
|
A plan view is contained within this document.
|
Balanced reporting
|
·
Where
comprehensive reporting of all Exploration Results is not
practicable, representative reporting of both low and high grades
and/or widths should be practiced to avoid misleading reporting of
Exploration Results.
|
Diamond and RC drill holes forming the basis of the Mineral
Resource estimate are reported herein.
|
Other substantive exploration data
|
·
Other
exploration data, if meaningful and material, should be reported
including (but not limited to): geological observations;
geophysical survey results; geochemical survey results; bulk
samples - size and method of treatment; metallurgical test results;
bulk density, groundwater, geotechnical and rock characteristics;
potential deleterious or contaminating substances.
|
No other exploration data is considered meaningful and material to
this document.
|
Further work
|
·
The nature and
scale of planned further work (e.g. tests for lateral extensions or
depth extensions or large-scale step-out
drilling).
·
Diagrams clearly
highlighting the areas of possible extensions, including the main
geological interpretations and future drilling areas, provided this
information is not commercially sensitive.
|
Future exploration may involve the drilling of more drillholes,
both diamond core and reverse circulation, to further extend the
mineralised zones and to collect additional detailed data on known
mineralized zones.
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|
Section 3 Estimation and Reporting of Mineral
Resources
CRITERIA
|
JORC CODE
EXPLANATION
|
COMMENTARY
|
|
Database
integrity
|
·
Measures taken to ensure that data has not been corrupted by, for example, transcription or keying errors, between its initial
collection and its use for Mineral Resource estimation
purposes.
·
Data
validation procedures used.
|
Data
has been compiled into a relational SQL database; the setup of this
database precludes the loading of data which do not meet the
required validation protocols. The data is managed using DataShed©
drill hole management software using SQL database techniques.
Validation checks are conducted using SQL and DataShed© relational
database standards. Data has also been checked against original
hard copies for 100% of the data, and where possible, loaded from
original data sources.
Resolute completed the following
basic validation checks on the data
supplied prior to resource estimation:
· Drill
holes with overlapping sample intervals.
· Sample
intervals with no assay data or duplicate records.
· Assay
grade ranges.
· Collar
coordinate ranges.
· Valid
hole orientation data.
There are no significant issues
identified with the data.
|
Site visits
|
·
Comment on any
site visits undertaken by the Competent Person and the outcome of
those visits.
·
If no site
visits have been undertaken indicate why this
is the case.
|
Mr
Patrick Smillie, a full-time employee of Resolute Mining Limited
and a Member of the Society for Mining Metallurgy and Exploration
is the Competent Person. He visited site in June, 2024.
|
Geological interpretation
|
·
Confidence in
(or conversely, the uncertainty of) the geological interpretation
of the mineral deposit.
·
Nature of the
data used and of any assumptions made.
·
The effect, if
any, of alternative interpretations on Mineral Resource
estimation.
·
The use of
geology in guiding and controlling Mineral Resource
estimation.
·
The factors
affecting continuity both of grade and geology.
|
The digital database used for the interpretation included logged
intervals for the key sedimentary unit. There is a moderate level
of confidence in the interpretation of the mineralised shear zone
primarily due to the relatively wide-spaced
drilling.
The mineralised volume has been
constructed using a Leapfrog Indicator wireframe at a cut-off of
0.25 g/t Au. The overall shape of the mineralised unit
has been guided by a sectional interpretation based on logged grain
size and the trend of mineralisation within the mineralised
shear.
The factors affecting continuity
both of grade and geology are most likely to be associated with
structural controls and local complexity, the knowledge of which is
limited with the current spacing of information. There appears to
be a direct correlation between grain size, arsenopyrite
concentration, and gold mineralistation. The broad approach to the
mineralisation modelling is an attempt to model an unbiased
interpretation.
|
Dimensions
|
·
The extent and
variability of the Mineral Resource expressed as length (along
strike or otherwise), plan width, and depth below surface to the
upper and lower limits of the Mineral Resource.
|
Gold mineralisation varies from several metres to over 20m in
thickness along the approximately 1km strike length currently
defined. Mineralisation dips near-vertically, striking at
appromsimately 10⁰ and has been defined to approximately 150m
vertical depth. The deposit remains open at depth and along
strike.
|
Estimation and modelling techniques
|
·
The nature and
appropriateness of the estimation technique(s) applied and key
assumptions, including treatment of extreme grade values,
domaining, interpolation parameters and maximum distance of
extrapolation from data points. If a computer assisted estimation
method was chosen include a description of computer software and
parameters used.
·
The availability
of check estimates, previous estimates and/or mine production
records and whether the Mineral Resource estimate takes appropriate
account of such data.
·
The assumptions
made regarding recovery of by- products.
·
Estimation of
deleterious elements or other non-grade variables of economic
significance (e.g. sulphur for acid mine drainage
characterization).
·
In the case of
block model interpolation, the block size in relation to the
average sample spacing and the search employed.
·
In the case of
block model interpolation, the block size in relation to the
average sample spacing and the search employed.
·
Any assumptions
behind modelling of selective mining units.
·
Any assumptions
about correlation between variables.
·
Description of
how the geological interpretation was used to control the resource
estimates.
·
Discussion of
basis for using or not using grade cutting or
capping.
·
The process of
validation, the checking process used, the comparison of model data
to drill hole data, and use of reconciliation data if
available.
|
Estimation of gold grade has been completed using Ordinary Kriging
(OK). Mineralisation has been constrained using Leapfrog Indicator
wireframes constructed within the host unit. The wireframe has been
used to define domain codes for estimation. Drillholes have been
flagged with the domain code and composited using the domain code
to segregate the data.
Domain boundary analysis has been
undertaken with hard boundaries used for all domains.
Drillholes have been composited to
1m intervals using Leapfrog Geo 2023.2.0 with residual lengths
distributed evenly across all composites within the domain. There
are no residual samples.
The influence of extreme gold assays
has been limited by top-cutting assays across all domains. Top-cuts
have been determined using a combination of log probability, log
histogram, and mean variance plots. Top-cuts have been reviewed and
applied to the composites on a domain-by-domain basis.
Variography has been undertaken on a
domain-by-domain basis in Datamine Supervisor v.8.14.3.3 using
top-cut values.
Drillhole data spacing ranges from
25m x 25m in densely drilled areas to approximately 50m x
50m.
The block model parent block size is
25m (X) by 25m (Y) by 5m (Z) with up to 16 sub-blocks per parent
block in the X and Y directions, and up to 8 sub-blocks per parent
block in the Z direction. Sub-blocks have been estimated at the
parent block scale. Block size is considered appropriate for the
drillhole spacing throughout the deposit.
Grade estimation has been completed
in three passes:
Ø Pass
1 estimation has been undertaken using a minimum of 4 and maximum
of 26 sample composites (determined using Datamine Supervisor
v.8.14 KNA tool) into a search ellipsoid with dimensions equal to
half the variogram range of the domain.
Ø Pass
2 estimation has been undertaken with the same minimum/maximum
samples as Pass 1 into a search ellipsoid twice the first
pass.
Ø Pass
3 estimation has been undertaken with the same minimum and maximum
number of samples as the first two passes into a search ellipsoid
twice the second pass
Ø A
maximum of four samples per drillhole has been used in the first
two passes, with no limits set on the third pass..
This is the first mineral resource
estimate released for the Mansala deposit.
The mineral resource estimate has
been validated using visual validation tools, mean grade
comparisons between the block model and declustered composite grade
means, and swath plots comparing the input composite grades and the
estimated block model grades by Northing, Easting, and
RL.
Leapfrog Geo v2023.2.3 and Datamine
Supervisor v8.14.3.3 software have been used for
estimation.
No by-product recoveries were
considered.
|
Moisture
|
·
Whether the
tonnages are estimated on a dry basis or with natural moisture, and
the method of determination of the moisture content.
|
Moisture was not considered in the density assignment.
|
Cut-off parameters
|
·
The basis of the
adopted cut-off grade(s) or quality
parameters applied.
|
A nominal lower cut-off grade of 0.25g/t Au was used to define the
mineralised domains to encompass the complete mineralised
distribution and produce a model that reduces the risk of
conditional bias that could be introduced where the constraining
interpretation and data selection is based on a significantly
higher grade than the natural geological grade
cut-off.
The cut-off grade for reporting is
similar to other deposits in the Siguiri basin.
|
Mining factors or assumptions
|
·
Assumptions made
regarding possible mining methods, minimum mining dimensions and
internal (or, if applicable, external) mining dilution.
It is always necessary as part of the process of determining
reasonable prospects for eventual economic extraction to consider
potential mining methods, but the assumptions made regarding mining
methods and parameters when estimating Mineral Resources may not
always be rigorous. Where this is the case, this should be reported
with an explanation of the basis of the mining assumptions
made.
|
The shallow occurrence of the mineralisation indicates that open
pit mining is appropriate, in line with other deposits in the
area.
The estimation methodology used results in an amount of edge
dilution being incorporated into the blocks of the model. No
account of mining loss has been incorporated.
|
Metallurgical factors or assumptions
|
·
The basis for
assumptions or predictions regarding metallurgical amenability. It
is always necessary as part of the process of determining
reasonable prospects for eventual economic extraction to consider
potential metallurgical methods, but the assumptions regarding
metallurgical treatment processes and parameters made when
reporting Mineral Resources may not always be rigorous. Where this
is the case, this should be reported with an explanation of the
basis of the metallurgical assumptions made.
|
No specific assumptions were made regarding metallurgical factors
for this estimate. .
|
Environmental factors or assumptions
|
·
Assumptions made
regarding possible waste and process residue disposal options. It
is always necessary as part of the process of determining
reasonable prospects for eventual economic extraction to consider
the potential environmental impacts of the mining and processing
operation. While at this stage the determination of potential
environmental impacts, particularly for a green fields project, may
not always be well advanced, the status of early consideration of
these potential environmental impacts should be reported. Where
these aspects have not been considered this should be reported with
an explanation of the environmental assumptions made.
|
No assumptions were made regarding environmental
restrictions.
|
Bulk density
|
·
Whether assumed
or determined. If assumed, the basis for the assumptions. If
determined, the method used, whether wet or dry, the frequency of
the measurements, the nature, size and representativeness of the
samples.
·
The bulk density
for bulk material must have been measured by methods that
adequately account for void spaces (vugs, porosity, etc), moisture
and differences between rock and alteration zones within the
deposit.
·
Discuss
assumptions for bulk density estimates used in the evaluation
process of the different materials.
|
Specific gravity values for the Mansala Prospect have been measured
based on the Archimedean Principle using the immersion method for
individual core samples. A total of 713 density measurements were
available for use, with the vast majority of these being in fresh
rock below the saprock and laterite domains. This data has been
used as the basis of the block model bulk density.
No relationship between density and
gold content could be established.
A default bulk density of
1.76t/m3 was assigned to oxide rocks.
A default bulk density of
2.16t/m3 was assigned to transitional rock.
Bulk density has been estimated in
the Fresh domain, with a value of . 2.72t/m3 assigned to
unestimated blocks.
|
Classification
|
·
The basis for
the classification of the Mineral Resources into varying confidence
categories.
·
Whether
appropriate account has been taken of all relevant factors (i.e.
relative confidence in tonnage/grade estimations, reliability of
input data, confidence in continuity of geology
and metal values, quality, quantity and distribution of the
data).
·
Whether the
result appropriately reflects the Competent Person's view of the
deposit.
|
The classification is based on the confidence in the continuity of
geology and mineralisation and quality/confidence in the estimation
and quality of assay data and bulk density data. Drillhole spacing
does not support classification above Inferred.
The Mineral Resource estimate
appropriately reflects the Competent Person's view of the
deposit.
|
Audits or reviews
|
·
The results of
any audits or reviews of Mineral
·
Resource
estimates.
|
No external reviews have been completed.
|
Discussion of relative accuracy/ confidence
|
·
Where
appropriate a statement of the relative accuracy and confidence
level in the Mineral Resource estimate using an approach or
procedure deemed appropriate by the Competent Person. For example,
the application of statistical or geostatistical procedures to
quantify the relative accuracy of the resource within stated
confidence limits, or, if such an approach is not deemed
appropriate, a qualitative discussion of the factors that could
affect the relative accuracy and confidence of the
estimate.
·
The statement
should specify whether it relates to global or local estimates,
and, if local, state the relevant tonnages, which should be
relevant to technical and economic evaluation. Documentation should
include assumptions made and the procedures used.
·
These statements
of relative accuracy and confidence of the estimate should be
compared with production data, where available.
|
Although the estimate for gold is considered to be without bias, it
is for some of the estimated volume based on relatively wide spaced
data. The estimate is therefore of moderate confidence and expected
to be of moderate relative accuracy at the local scale when
drilling density exceeds 50m x 50m. Infill drilling will be
required to improve the confidence of the local
estimate.
|
|
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