NevGold Corp. (“
NevGold” or the
“
Company”)
(TSXV:NAU) (OTCQX:NAUFF)
(Frankfurt:5E50) is pleased to announce that it has
identified
significant copper porphyry
potential after completing a geological review and 3-D model of the
newly staked Zeus Copper Project in the emerging Hercules Copper
Trend in southwestern Idaho. The Company’s geological
review included detailed assessments of historical records,
compilations and reinterpretation of numerous published geological
maps, creation of a 3-D geological model, and analysis of rock chip
samples collected by the NevGold Team while staking the mineral
claims over the past 6 months.
Key Highlights
- Positive results from the
geological review and 3-D model highlight the
significant copper porphyry potential at
the Zeus Copper Project
- Strong similarities have been
identified between the Zeus Project and the Hercules Silver Corp.
(TSXV:BIG, “Hercules”) copper porphyry discovery at the Hercules
Project (see Hercules Silver News Release dated October
10, 2023):
- Both projects have Triassic age
plutons, the likely source of the copper porphyry
- Both projects have Olds Ferry terrane
rocks including the Hercules Rhyolite and Lower Huntington
Formation (Seven Devils equivalent)
- Both projects have a cover sequence of
Izee terrane rocks including the Weatherby Formation
- Both projects are located along the
Bayhorse Thrust Fault, a major structural corridor, which places
Izee Terrane rocks (Weatherby Formation) overtop of Olds Ferry
terrane rocks (Huntington Formation)
- Both projects have abundant mineral
occurrences and historical mine workings
- Both projects are erosional windows
through the post-mineral Columbia River basalts that cover the vast
majority of the Hercules Copper Trend
- NevGold will rapidly advance
preparations for an active field program at Zeus starting in
May
NevGold CEO, Brandon Bonifacio,
comments: “We are very pleased with how positive
the results have been from our upfront geological work on the newly
staked Zeus Copper Project. Due to our strong presence in
Washington County, Idaho with our Nutmeg Mountain gold project, our
team had a robust understanding of the regional geology which we
were able to leverage in the identification of the Zeus
Project as the next best copper porphyry target on the
trend alongside the Hercules Project. Over the past 6
months we have also spent a significant amount of time in the field
with our technical team. Instead of utilizing external land staking
crews, our core NevGold team completed the staking process which
also allowed us to advance surface geology work including
reconnaissance mapping and rock chip sampling as we were in the
field staking claims. This has been a major advantage in being able
to rapidly advance the project. All of the geological signatures
that we encountered through our geological review and time
in the field solidify our view that Zeus has excellent copper
porphyry potential and is some of the most strategic ground in this
emerging Hercules Copper Trend.”
NevGold VP Exploration, Derick Unger,
comments: “The copper potential at Zeus has stood out
since our first day in the field when we were finding float
samples with copper mineralization and porphyry-style alteration in
outcrops. Our enthusiasm for the project has continued to
grow as we have completed our geological review. The similarities
to the Hercules Project are striking. Both projects host a large
suite of rocks from the Olds Ferry terrane including a significant
thickness of Hercules Rhyolite which conceals the blind porphyry at
the Hercules Project, and will be an important area to test at
Zeus. It is also very encouraging that both projects have Triassic
age plutons, which is the likely source of the copper porphyry
mineralization at the Hercules Project. This suggests there is
strong potential for discovery of a blind copper porphyry at Zeus
as well. The main focus now is rapidly advancing the project, and
we are preparing for an active field program starting in May as the
snow melts and the field conditions improve. Zeus offers some of
the most compelling copper porphyry targets in this emerging copper
trend.”
Geology of the Hercules Copper
TrendThe Hercules Copper Trend is hosted in the Blue
Mountain Province, a series of accreted terrains of
Permian-Triassic intrusive rocks (plutons) and Triassic-Jurassic
volcanic and sedimentary rocks. At the Hercules Project the
existence of historically mined silver-base metal veins in the
Jurassic volcanic rocks led Hercules to drill beneath the volcanic
rocks into the underlying Triassic intrusive rocks where
porphyry-style copper mineralization was discovered (Figures 1 and
2). The same geologic conditions identified at the Hercules
Project exist at the Zeus Project, where historical production of
silver-base metal veins in Jurassic-Triassic volcanic and
sedimentary rocks on the western side of the district transitions
to Triassic intrusive rocks with porphyry-style alteration and
copper mineralization present at surface (Figures 1, 2, 3, and
4).
Figure 1 – Geologic Map of the Hercules Copper
Trend compiled by the NevGold geology team. Modified from
(Henricksen, 1974), (Fankhauser, 1968), (Skurla, 1974), (Lund,
2021), (Adair, 1985).
Please click here to view image
Figure 1 Summary: Figure 1
outlines the geologic map of the Hercules Copper Trend compiled and
reinterpreted by the NevGold geology team. As the figure shows,
there are many similarities between the Hercules Project and Zeus
Project. Both projects exhibit the same host rocks including the
Olds Ferry terrane rocks of the Upper Huntington Formation,
including the Hercules Rhyolite, as well as rocks of the Lower
Huntington Formation (Seven Devils equivalent) which were intruded
by Triassic aged plutons and are a likely host to copper porphyry
mineralization. Additionally, both projects have significant
amounts of Izee terrane rocks of the Weatherby Formation, which are
post-mineral and could conceal a copper porphyry deposit.
Figure 2 – Side by Side of Hercules Project and
Zeus Project Geology. Maps compiled by NevGold geology
team.Modified from (Henricksen, 1974), (Fankhauser, 1968), (Skurla,
1974), (Lund, 2021), (Adair, 1985).
Please click here to view image
Figure 2 Summary: Figure 2
outlines that both the Hercules Project and Zeus Project contain
the Hercules Rhyolite (light blue) and other Olds Ferry terrane
rocks along with Triassic plutons (brown), which have been
identified as important factors in the formation and preservation
of potential copper porphyry deposits in the district. The
similarities between the Hercules Project and Zeus Project are
included in the Key Highlights section above.
Figure 3 – Zeus Project Geology Map compiled by
NevGold geology team. Modified from (Henricksen, 1974), (Lund,
2021), (Mitchell & Bennett, 1979).
Please click here to view image
Figure 3 Summary: Figure 3
identifies the presence of Olds Ferry terrane volcanic and
sedimentary rocks of the Huntington Formation (dark to light blue)
which host numerous historical mineral occurrences and mine
workings that primarily focused on high-grade silver-base metal
veins. The Triassic intrusive rocks (brown) lay beneath and intrude
into the volcanic and sedimentary rocks and show indications of
copper porphyry style mineralization.
Figure 4 – Zeus Project cross-section interpreted
by NevGold geology team. Geologic mapping and historical
drilling at the Mineral Project (left and center of Figure) suggest
a tilted porphyry deposit with the porphyry center
east (right side of Figure) of the historical
drillholes.
Please click here to view
image
Figure 4 Summary: Figure 4 is a
cross-section looking north through the Mineral Project (Hercules)
and Zeus Project (NevGold) in the Mineral District. The historical
drilling completed at the Mineral Project suggests that there is a
tilted copper porphyry deposit with the porphyry center located to
the east of the historical drillholes. NevGold’s Zeus
Project is to the east of the historical drillholes.
Figure 5 – Zeus Project Stratigraphic Column
compiled by NevGold geology team. Modified from (Henricksen, 1974),
(Dorsey & LaMaskin, 2007), (Lund, 2021).
Please click here to view image
Figure 5 Summary: Figure 5
summarizes the stratigraphic units identified in the district.
Copper mineralization appears to be related to the Triassic plutons
ranging between 210-200 Ma. The United
States Geological Survey (“USGS”) has dated Triassic plutons on the
Zeus Project at 204 Ma and 200 Ma. The silver-base metal
mineralization is hosted in the Hercules Rhyolite and other
Huntington Formation rocks (Olds Ferry terrain) as well as the
Triassic plutons.
Planned 2024 Activities and Status
UpdateNevGold plans an active exploration program at Zeus
in 2024. This program includes:
- Geological review
and 3-D model creation (completed);
- Geological mapping
(in process);
- Comprehensive
surface geochemical sampling (in
preparation);
- Geophysics such as
magnetics, gravity, EM, CSAMT, or IP (in
preparation); and,
- Drill testing
copper targets identified by the above activities (subject
to the above activities).
History of the Mineral District,
Washington County, IdahoTotal historical production from
the Mineral District is nearly 1 million ounces of silver, and over
900,000 pounds of copper, along with significant lead and zinc, and
minor gold credits (Table 1). Mineralization was first identified
in the Mineral District in the 1870’s by local prospectors. The
early work ultimately led to the development of two smelters where
ore was processed and then shipped across the Snake River to
Huntington, Oregon (Mitchell V. E., 2000).
The Mineral District has seen minimal modern
exploration campaigns. The most notable campaigns were on the land
now covered by Hercules’ Mineral Project and came from Cyprus
Mining between 1968-1970. Cyprus drilled several holes intersecting
high-grade silver bearing polymetallic veins and copper
mineralization. Two of the holes (MDD-1 and MDD-2, Figure 4) were
drilled into what appears to be the distal porphyry zone and
encountered significant copper values and propylitic alteration
(MDD-1 and MDD-2 were not assayed for gold or molybdenum) (see
Hercules Silver News Release dated October 2, 2023). To NevGold’s
knowledge, no modern exploration has been completed at Zeus prior
to NevGold staking the project.
The Mineral District has two types of
mineralization (Anderson & Wagner, 1952). The majority of the
historical ore was produced from silver-bearing veins composed of
fine-grained sulphides in calcite gangue. The ore minerals
consisted of pyrite, tetrahedrite, chalcopyrite, galena and
sphalerite with localized enrichments of marcasite, wurtzite and
sulphosalts. The second type of mineralization style in the Mineral
District was reported at the Jessie/Condor mine and was
characterized by quartz-tourmaline veins that contain tetrahedrite,
galena, pyrite, chalcopyrite, and sphalerite, which occurred in
fissured and fractured diorite and quartz diorite. In 1901, famous
geologist Waldemar Lindgren visited the Mineral District and noted
that:
"The Jessie (Condor) represents a totally
different type of deposit. Tourmaline veins are, as a rule,
connected with deep-seated processes and formed under higher
pressure and temperature than ordinary hydrothermal gold and silver
veins" (Lindgren, 1901).
Quartz tourmaline veins are often associated
with deep seated hydrothermal systems that can serve as indicators
of porphyry coppery style deposits due to their association with
hydrothermal fluid pathways.
Mine and Years in Production |
Ore (tons) |
Old Tailings (tons) |
Gold (ounces) |
Silver (ounces) |
Copper (pounds) |
Lead (pounds) |
Zinc (pounds) |
Historical Smelter Production pre-1900* |
Unknown |
|
|
600,000 |
266,700 |
|
|
Black Hawk Mine (1947) |
21 |
|
|
515 |
590 |
247 |
|
Jessie/Condor Mine (1941) |
12 |
|
8 |
15 |
705 |
|
|
Enterprise Mine (1918-1947) |
210 |
|
|
10,306 |
11,560 |
1,928 |
|
Eagan Mine (1919-1949) |
3,177 |
4 |
4 |
169,051 |
122,524 |
3,205 |
|
Ladd Metals Co. (1903-1905) |
5,673 |
|
55 |
8,890 |
373,493 |
3,205 |
|
Other properties (1940) |
26 |
|
|
2,630 |
2,022 |
338 |
|
Silver Still Mine (1922-1950) |
4,989 |
|
25 |
166,128 |
123,275 |
135,555 |
4,630 |
Total for District |
14,108 |
4 |
92 |
957,535 |
900,869 |
144,478 |
4,630 |
Table 1 – Mineral District Historical Production,
compiled by Mitchell (2000).
Figure 6 - Zeus Project Location and Hercules
Copper Trend
Please click here to view image
ON BEHALF OF THE BOARD
“Signed”
Brandon Bonifacio, President &
CEO
For further information, please contact Brandon
Bonifacio at bbonifacio@nev-gold.com, call 604-337-4997, or visit
our website at www.nev-gold.com.
Technical information contained in this news
release has been reviewed and approved by Derick Unger, CPG, the
Company’s Vice President, Exploration, who is NevGold’s Qualified
Person under National Instrument 43-101 and responsible for
technical matters of this release.
About the CompanyNevGold is an
exploration and development company targeting large-scale mineral
systems in the proven districts of Nevada and Idaho. NevGold owns a
100% interest in the Limousine Butte and Cedar Wash gold projects
in Nevada, and the Nutmeg Mountain gold project and Zeus copper
project in Idaho.
Neither the TSX Venture Exchange nor its
Regulation Services Provider (as that term is defined in the
policies of the TSX Venture Exchange) accepts responsibility for
the adequacy or accuracy of this release.
Cautionary Note Regarding Forward Looking
Statements
This news release contains forward-looking
statements that are based on the Company’s current expectations and
estimates. Forward-looking statements are frequently characterized
by words such as “plan”, “expect”, “project”, “intend”, “believe”,
“anticipate”, “estimate”, “suggest”, “indicate” and other similar
words or statements that certain events or conditions “may” or
“will” occur. Forward-looking statements include, but are not
limited to, the proposed work programs at Zeus, and the exploration
potential at Zeus. Such forward-looking statements involve known
and unknown risks, uncertainties and other factors that could cause
actual events or results to differ materially from estimated or
anticipated events or results implied or expressed in such
forward-looking statements. Such risks include, but are not limited
to, general economic, market and business conditions, and the
ability to obtain all necessary regulatory approvals. There is some
risk that the forward-looking statements will not prove to be
accurate, that the management’s assumptions may not be correct or
that actual results may differ materially from such forward-looking
statements. Accordingly, readers should not place undue reliance on
the forward-looking statements. Any forward-looking statement
speaks only as of the date on which it is made and, except as may
be required by applicable securities laws, the Company disclaims
any intent or obligation to update any forward-looking statement,
whether as a result of new information, future events or results or
otherwise. Forward-looking statements are not guarantees of future
performance and accordingly undue reliance should not be put on
such statements due to the inherent uncertainty therein.
ReferencesAdair, D. H. (1985).
High-Grade Silver Potential of The Hercules Project, Cuddy Mountain
District, Idaho. Anglo-Bomarc Mines, LTD.Anderson, A. L., &
Wagner, W. R. (1952). Reconnaissance Geology and Ore Deposits of
The Mineral District. . Idaho Department of Land: Bureau of Mines
and Geology.Dorsey, R. J., & LaMaskin , T. A. (2007).
STRATIGRAPHIC RECORD OF TRIASSIC-JURASSIC COLLISIONAL. American
Journal of Science, Vol. 307 December 2007, P. 1167-1193, DOI
10.2475/10.20007.03.Fankhauser, R. E. (1968). Geologic Map of The
Southern Cuddy Mountains Washington County, Idaho. Idaho Geological
Survey.Henricksen, T. A. (1974). Geology and Mineral Deposits of
the Mineral-Iron Mountain District, Washington County, Idaho, And
of a Metallized Zone in Western Idaho and Eastern Oregon. A Thesis
Submitted to Oregon State University.Lindgren, W. (1901). The Gold
Belt of The Blue Mountains of Oregon. USGS 22nd Annual
Report.(1900–1901) pt, 11, pp.561-776.Lund, K. (2021). Geology of
the Payette National Forest and Vicinity, West-Central Idaho. U.S.
Department of the Interior, U.S. Geological Survey.Mitchell, V. E.
(2000). History of Selected Mines in the Minerals District,
Washington County, Idaho. Idaho Geological Survey, Staff Report
00-14.Mitchell, V. E., & Bennett, E. H. (1979). Geologic Map of
The Baker Quadrangle, Idaho. Idaho Department of Land: Bureau of
Mines and Geology.Skurla, S. J. (1974). Geologic Map of The
Sturgill Peak Area, Washington County, Idaho. Thesis Submitted to
Oregon State University.
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