REG - Great Western Mining - Huntoon Copper Project Update

Great Western MiningAnnouncement

27/10/2025 07:00

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RNS Number : 8342E  Great Western Mining Corp. plc  27 October 2025

 

Great Western Mining Corporation PLC / AIM: GWMO / Euronext Growth: 8GW

 

27 October 2025

GREAT WESTERN MINING CORPORATION PLC

("Great Western", "GWM" or the "Company")

 

Tungsten-Copper-Zinc Footprint Expanded in Huntoon Area, Nevada

 

Confirmed 2.8 km strike length of geochemically anomalous soil samples
underscores district-scale potential

 

Great Western Mining Corporation PLC, a strategic minerals exploration and
development company, is pleased to announce the results of a soil sampling
campaign for tungsten and other metals on claims bordering its Huntoon Copper
Project in Nevada USA.

 

HIGHLIGHTS

·    98 soil samples were collected across 198 acres (0.8 km²) in the
vicinity of GWM's already established M2 copper skarn resource and the
historically mined Pine Crow and Defender tungsten skarns.

·    Elevated tungsten, copper and zinc were traced for at least 1.4 km
along strike following a granite-limestone contact, indicating extensions to
the outcropping skarn-style mineralisation at Pine Crow and Defender.

·    When integrated with previous soil samples from the M2 skarn area,
the soil geochemical anomaly extends over 2.8 km of strike length, from south
of the M2 resource to Pine Crow, with consistently elevated tungsten, copper
and zinc in soil values.

 

Great Western Chairman Brian Hall commented: "Together with our ongoing drill
programme in the area, we are rapidly increasing our understanding of the
extensive mineralisation across the Huntoon Copper Project and adjoining
claims. These results are particularly encouraging, revealing a clear
geochemical link between the outcropping tungsten-rich Defender and Pine Crow
workings and our established copper resource at M2. The consistency and scale
of these anomalies suggest the presence of a significantly larger mineralised
system than previously recognised. We will now initiate targeted geological
fieldwork and follow-up sampling to delineate the extent of tungsten, copper
and zinc mineralisation, with the aim of advancing these zones towards a new
drilling campaign.

 

BACKGROUND

The Defender and Pine Crow skarns, which are thought to have produced tungsten
during World War II, lie approximately 2 km northeast of and on trend with the
Company's M2 skarn copper resource.  These outcropping skarns occur at the
contact zones of Cretaceous granitic intrusions with limestones of the
Jurassic Dunlap Formation. Earlier field mapping and rock chip sampling
confirmed scheelite-bearing skarns at both Defender and Pine Crow, with rock
chip samples recording up to 1.75% tungsten trioxide (WO(3)) (see RNS dated 16
June 2025).

 

The purpose of the summer 2025 soil sampling campaign was to test for
extensions of mineralisation in the vicinity of the previously mined Pine
Crow/Defender tungsten skarn workings and the Company's nearby copper resource
at the M2 skarn.

 

98 soil samples were collected across 198 acres (0.8 km(2)) between
Defender/Pine Crow and the Company's previous soil sample grid at M2. Elevated
tungsten (W), copper (Cu) and zinc (Zn) in soil results were traced for
approximately 1.4 km along the granite-limestone contact zone. Five samples
from the contact zone were greater than 75 ppm Cu, with one sample containing
385 ppm Cu.  Zn in soil is elevated up to 81 ppm Zn in the contact zone
compared to <40 ppm away from the contact.  W in soil is elevated up to 6
ppm in the contact zone, compared to background values of <1 ppm W in soil
away from the contact zone. Due to its refractory nature, W concentration is
also likely to have been under-represented by the aqua regia digest method
used in the lab analysis. When correlating trends with the Company's
historically reported soil sample grid in the M2 area, elevated W, Cu and Zn
in soils can be traced for over 2.8 km in strike length, from south of the M2
resource to Pine Crow.

 

The spatial extent of these results highlights the potential scale of the
mineralising system and indicates correlation between the M2 copper skarn
resource and the tungsten rich skarns in the Pine Crow/Defender area. In the
short term, the Company will follow up with infill soil sampling analysis
together with detailed geological mapping for a better evaluation of further
skarn-mineralisation in the area and to delineate areas for geophysical
surveys and channel sampling. The results of this work will guide the
generation of drill targets.

 

 

Figure 1: Map of the Pine Crow/Defender area showing W (ppm) in soil
samples, from this sampling campaign and previous sampling campaigns from the
M2 area, and previously reported W (ppm) in rock chip samples.

 

 

ADDITIONAL INFORMATION

All soil samples were processed by ALS laboratories, Reno, Nevada. Samples
were screened to -80 mesh and analysed by method AuME-TL43, aqua regia digest
with ICP-MS finish. Quality control samples were inserted by the Company and
results reviewed prior to release.

 

QUALIFIED PERSON STATEMENT

The information in this announcement that relates to exploration results is
based on information reviewed by Dr Lawrence Carter MSc PhD MAusIMM who is an
Independent Geological Consultant. Dr Carter is a "Qualified Person" as
defined in the "Note for Mining and Oil & Gas Companies" which form part
of the AIM Rules for Companies. Dr Carter has reviewed and consented to the
inclusion in the announcement of the information in the form and context in
which it appears.

 

ENDS

 

For further information visit www.greatwesternmining.com or contact:

 

 Great Western Mining Corporation PLC
 Brian Hall, Chairman                                           c/o St Brides
 Max Williams, Finance Director                                 greatwesternmining@stbridespartners.co.uk
 Davy
 Nominated Adviser, Euronext Growth Adviser & Joint Broker
 Brian Garrahy                                                  +353 (0)1 679 6363
 Shard Capital Partners
 Joint Broker
 Andrew Gutmann / Erik Woolgar                                  +44 (0)20 7186 9008
 St Brides Partners
 Financial PR
 Susie Geliher / Isabel de Salis / Will Turner                  greatwesternmining@stbridespartners.co.uk

 

Notes

Great Western Mining Corporation PLC (AIM: GWMO / Euronext Growth: 8GW) is a
diversified exploration and development company focused on strategic minerals
across several 100%-owned claim groups in Mineral County, Nevada, one of the
world's most prolific and mining-friendly jurisdictions. Backed by an
experienced team, the Company is pursuing a multi-commodity strategy targeting
near-term development and longer term exploration while assessing farm-out and
joint venture opportunities to unlock broader portfolio value. As well as its
flagship Huntoon Copper Project, which hosts a JORC-compliant resource of 4.3
Mt at 0.45% Cu, with upside from undrilled porphyry targets, it has a pipeline
of gold, silver, and early-stage tungsten assets aligned with US critical
minerals priorities.

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