REG - Great Western Mining - Metallurgical Test Work Underway: Tungsten Project

Great Western MiningAnnouncement

07/05/2026 07:00

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RNS Number : 3220D  Great Western Mining Corp. plc  07 May 2026

 

GREAT WESTERN MINING CORPORATION PLC

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

 

Metallurgical Test Work Underway at Tungsten Project

 

Great Western Mining Corporation PLC (AIM: GWMO & ESM: 8GW), the
exploration and development company focused on mineral projects in Nevada,
USA, is pleased to announce that it is undertaking proof-of-concept flotation
test work on material from its Defender - Pine Crow Tungsten Project
("Defender - Pine Crow" or the "Project") in Mineral County, Nevada.

 

HIGHLIGHTS

·    Eriez Global of Erie, Pennsylvania appointed to conduct flotation
test work on a 750 kg bulk sample from Defender - Pine Crow.

·    Programme to target scheelite mineralisation in skarn host rocks,
applying a proven flowsheet to produce a high-grade tungsten ore concentrate
with high recovery.

·    Test work to validate processing potential and advance the Project as
a US-based tungsten opportunity

·    Assay results, expected in Q3 2026, to contribute towards maiden
Mineral Resource Estimation ("MRE") targeted for Q4 2026.

 

Great Western CEO, Ed Loye, commented: "Engaging Eriez to undertake this test
work represents an important step forward in validating the metallurgical
characteristics of the mineralisation at Defender - Pine Crow. By applying an
established flowsheet to a representative bulk sample, we aim to confirm the
suitability of conventional flotation techniques for scheelite recovery.

 

"We are conducting this work alongside several other activities at the
Project, including geophysics, mapping and trenching, all ahead of the fully
funded drill campaign scheduled to commence in July 2026.  This highlights
the team's confidence in the near-term potential for Defender - Pine Crow and
our eagerness to expedite exploration efforts and advance towards a maiden MRE
this year."

 

DETAILS

Metallurgical Test Work Programme

The Company has dispatched a 750 kg bulk sample of run-of-mine material from
the Defender - Pine Crow opencut mines to Eriez in Erie, Pennsylvania. The
sample is representative of scheelite-bearing skarn mineralisation observed at
surface in previously active open-pit mines abandoned after the cessation of
WWII.

 

Eriez will undertake proof-of-concept flotation test work using a pre-existing
flowsheet applicable to this style of tungsten mineralisation. The programme
is designed to assess recovery characteristics, concentrate grades and overall
processing response of the material.

 

The work will be carried out at Eriez's Pennsylvania laboratory, a
well-established facility known for metallurgical process development and
simulation across a range of mineral systems.

 

Results from this test work will contribute to the Company's understanding of
the processing pathways available for Defender - Pine Crow and will inform
future metallurgical and processing workstreams.

 

Background

The Defender and Pine Crow tungsten skarns are located approximately 3 km
northeast of and on trend with the Company's M2 skarn copper resource in
Mineral County, Nevada. Historic production of tungsten from these skarns
dates back to a short period during the Second World War.

 

Following earlier positive field mapping and grab sampling, in December 2025
the Company undertook a machine-cut channel sampling programme at Defender.
Two channels returned significant tungsten mineralisation, including 6 m at
0.17% WO₃, including 1 m at 0.43% WO₃, and 16 m at 0.30% WO₃, including
2 m at 0.66% WO₃ (see RNS dated 29 January 2026). Importantly, elements that
could represent potential processing penalties were recorded at very low
concentrations, and silver mineralisation was also intersected within Channel
B.

 

The Company launched a fully funded expanded exploration programme at Defender
- Pine Crow during Q1 2026 to accelerate progress towards defining a maiden
MRE and test its scale, continuity and geometry of the mineralised system.
This work also includes testing the potential geological relationship of
Defender - Pine Crow to the broader mineralised trend extending towards M2,
located more than 3 km to the southwest.

 

Further announcements will be made in due course.

 

 

 

**ENDS**

 

 

 Great Western Mining Corporation PLC
 Brian Hall, Chairman                                           c/o St Brides

 Ed Loye, CEO                                                   greatwesternmining@stbridespartners.co.uk
                                                                (mailto:greatwesternmining@stbridespartners.co.uk)
 Max Williams, Finance Director
 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                                greatwesternmining@stbridespartners.co.uk
                                                                (mailto:greatwesternmining@stbridespartners.co.uk)

 

Notes

Great Western Mining Corporation PLC (AIM: GWMO / Euronext Growth: 8GW) is an
exploration and development company focused on strategic minerals across
several 100%-owned claim groups in Mineral County, Nevada, a highly
prospective and mining-friendly jurisdiction. The Company has an increasing
strategic emphasis on tungsten as a critical mineral, while continuing to
advance its Huntoon Copper Project, which hosts a JORC-compliant resource of
4.3 Mt at 0.45% Cu with further porphyry upside. It also maintains exposure to
gold and silver through exploration and tailings reprocessing opportunities,
alongside evaluating farm-out and joint venture options to unlock wider
portfolio value.

 

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