Industrial Sorting Tests increase by 170 % the Grade of the Mineralisation of the Chimo Mine Property
08 April 2021 - 2:30PM
Cartier Resources Inc. (TSX-V: ECR) (“Cartier”) announces the
results industrial sorting tests of mineralisation representative
for the Chimo Mine property, located 45 km east of Val-d'Or.
The tests were carried out by two laboratories: Corem in Quebec
(Canada) and Steinert US in Kentucky (USA).
Corem Sorting Tests :
Gold from the Mine Chimo property is present in
two types of mineralised facies (FIGURE)
either : i) quartz veins with coarse visible gold grains
having an affinity for the gravity concentration of gold at the
mill and ii) zones of silica-rich mafic rocks associated with
non-refractory arsenopyrite having an affinity for the flotation of
a concentrate of arsenopyrite for gold recovery at the mill. To
perform the sorting tests, rocks representative of the 2
mineralised facies, made up of the following 6 mineralogical
facies, were first selected for static recognition of each of the
facies by the sensors of the sorter:
- Gold-bearing quartz veins;
- Gold-bearing silica;
- High grade gold-bearing
arsenopyrite;
- Medium grade gold-bearing
arsenopyrite;
- Low grade gold-bearing
arsenopyrite;
- Mafic waste rock.
The detection sensors of the industrial sorter
are the RGB camera using the optical properties of reflection,
brightness and transparency to locate quartz and silica and the XRT
sensor using the volumetric property of atomic density to locate
arsenopyrite. The 2 sensors adequately recognizing the 6
mineralogical facies associated with the mineralisation, dynamic
calibration tests of the sorter with the moving conveyor made it
possible to sort, one at a time, 2 kg samples of each of the
facies.
The sensor recognition tests having been
successful, a calibration sample composed of a fraction of each of
the mineralogical facies, was then constituted in order to verify
the efficiency of the calibration of the sorter for the Chimo Mine
project mineralisation. This sorting test is composed of a mixture
of the 6 mineralogical facies, mentioned above, in proportions
representative of the Chimo Mine project mineralisation. The
results of this first test show that the first 3 sorts (on a total
of 8 sorts) concentrated 99.1 % of the gold contained in
44.4 % by mass of material mass for a grade of
56.3 g/t Au representing a percentage increase of
223 % in gold content over sorter feed. The reject,
representing 0.9 % by mass of material, contains only
0.40 g/t Au.
The sorter was then ready to perform sorting
tests on the 105.7 kg production sample, representative of the
mineralised facies at an average grade of 2.16 g/t Au.
This content is obtained by including 20 % by mass of material
with at zero grade of gold, simulating dilution in the stopes.
Corem's sorting plan separated 53.9 % by mass of the material
in the form of a preconcentrate at an average grade of
3.68 g/t Au representing a percentage increase of
170 % in the gold grade compared to the sorter feed. The waste
disposal, thus separated from the mineralisation, represents
46.1 % by mass of material at an average grade of
0.38 g/t Au.
Steinert US Sorting Tests :
Sorting tests, carried out with Steinert in
Kentucky (USA), yielded comparable results. An 80.69 kg
production sample, representative of the mineralised facies at an
average grade of 2.13 g/t Au, to which 20 % by mass of
material at zero grade of gold was added mathematically,
representing the dilution in the workings, was used for testing.
The new grade thus diluted is now 1.55 g/t Au.
Calculation of the results reveals that 51.0 % by mass of the
dilute grade material could be separated as a preconcentrate at an
average grade of 2.72 g/t Au representing a 175 %
increase in gold grade compared to the sorter feed. The waste
disposal, which would thus be separated from the mineralisation,
would represent 49.0 % by mass of material at an average grade
of 0.36 g/t Au. Sorting tests with Corem were carried out
following these tests to validate that the 20 % of dilution
material at zero grade of gold, mathematically added, could
physically be effectively separated by the sorter. The results
obtained by Corem are positive and of the same order of magnitude
as those of Steinert US.
Highlights of Chimo Mine
Project
- Recall that the third gold resource
estimate* 1 made available on March 22, 2021 reported
(FIGURE):
-
6,616,000 tonnes at an average grade
of 3.21 g/t Au for a
total of 684,000 ounces of gold in the
Indicated category and;
-
15,240,000 tonnes at an average grade
of 2.77 g/t Au for a total of
1,358,000 ounces of gold in the Inferred
category.
*1 : Mineral Resource
Estimate of the Chimo Mine property, Québec, Canada, Christine
Beausoleil, P. Geo. InnovExplo Inc., March 22 2021.
- Cartier holds a
100 % interest in the property for which a 1 % NSR
(“Net Smelter Return”) royalty has been granted to IAMGOLD
Corporation. There is no right of first refusal.
- The property,
accessible year-round, is located near 6 ore processing mills in
the Val-d’Or area.
- Fourteen gold zones
were exploited by three producers between 1964 and 1997 for a
production of 376,217 ounces of gold.
- The mining
infrastructure consists of a network of drifts over 7 km,
distributed over 19 levels and connected by a
5.5 m x 1.8 m three-compartment shaft for a
depth of 920 m. The headframe and surface installations were
dismantled in 2008, but the 25 kV power line and sandpit are
still in place.
- The study on the
hoisting capacities of the shaft of the Chimo Mine property reveals
that the components of the internal structure of the shaft could
allow hoisting with elongated 20 metric tons (mt) “skips”,
4,921 mt / day at the rate of 10 hours of hoisting operation
per 24-hour day, i.e. 1.7 M mt / year. The
hoisting capacity in 10 hours of
operation / 24 hours, could be increased to
6,151 mt / day (2.2 M mt / year)
with “skips” of 25 mt and to 7,381 mt / day
(2.6 M mt / year) with “skips” of 30 tm;
all mainly by replacing the guides in place with steel guides.
- Cartier’s drilling
to date on the Chimo Mine Property consists of 124 holes
totalling 58,054 m and 21,867 samples collected for gold
analysis.
About Cartier
Cartier Resources Inc., founded in 2006, is
based in Val-d’Or, Quebec. This province has consistently ranked as
one of the world’s best mining jurisdictions, primarily because of
its favourable geology, attractive fiscal environment and
pro-mining government.
- The Company has a strong cash
position with more than $10.4 million and a significant
corporate and institutional endorsement, including Agnico Eagle
Mines, Jupiter Asset Management and Quebec investment funds.
- Cartier’s strategy is to focus on
gold projects with features that offer the potential for rapid
growth.
- The Company holds a portfolio of
exploration projects in the Abitibi Greenstone Belt of Quebec, one
of the world’s most prolific mining regions.
- The Company’s focus is to advance
its four key projects through drilling programs. All of the
projects were acquired at reasonable costs in recent years and are
drill-ready with targets along the geometric extensions of gold
deposits.
- Exploration work is currently
focused on the Chimo Mine and Benoist properties to maximize value
for investors. Future exploration work is planned on the Fenton and
Wilson properties.
Quality Assurance / Quality
Control
The analytical results, from Cartier drill
holes, were obtained from NQ-caliber core samples crushed up to
80 % passing a 10 mesh (2.00 mm) mesh then
pulverized up to 90 % passing a mesh of 200 mesh
(0.07 mm). Cartier inserts 5 % of the number of samples
as certified standards and another 5 % as sterile samples to
ensure quality control. Samples are analyzed at Techni-Lab
(Actlabs), located in Ste-Germaine-Boulé, Quebec. The 50 g
pulps are analyzed by fire assay and read by atomic absorption. If
i) the result is
≥ 1.0 g/t and <10.0 g/t, a second pulp
is analyzed and read by atomic absorption and if ii) the
result ≥ 10.0 g/t, the second measurement is
performed by gravimetry. For samples containing visible gold,
500 g of rock pulverized up to 90 % passing a
140 mesh (0.11 mm) mesh is analyzed by the
" Metallic Sieve " method.
Qualified Persons
The scientific and technical information on the
Company and the Chimo Mine Project in this news release was
prepared and reviewed by Mr. Gaétan Lavallière, P. Geo.,
Ph. D, Cartier’s Vice- President, and Mr. Ronan
Déroff, P. Geo, M. Sc., Cartier’s Senior Geologist,
Project Manager and Geomatician, both qualified persons as defined
in NI 43-101. Mr. Lavallière approved the information contained in
this press release.
About Corem
Corem is a center of expertise in research and
innovation, established in Quebec, which specializes in the
processing of minerals. Using its state-of-the-art facilities,
Corem has, for more than 20 years, offered services in the
optimization of grinding circuits, physical separation
(gravimetric, magnetic and electrostatic), flotation,
physico-chemical techniques of extractive metallurgy and recovery
of metals, mineralogical characterization as well as agglomeration
and thermal treatment processes of ores.
For more information, contact:Philippe Cloutier,
P. Geo.President and CEOTelephone:
819-856-0512philippe.cloutier@ressourcescartier.comwww.ressourcescartier.com
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adequacy or accuracy of this press release.
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