REG - Arkle Resources PLC - Stonepark Zinc Project – Operations Update

Arkle ResourcesAnnouncement

16/04/2026 11:30

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RNS Number : 7911A  Arkle Resources PLC  16 April 2026

16 April 2026

Arkle Resources PLC

("Arkle" or the "Company")

Stonepark Zinc Project - Operations Update

 

Group Eleven to Mobilise a Rig at Stonepark Zinc Project Imminently for
four-hole, 2,700 m Drill Programme Phase

 

Arkle Resources PLC (LSE:ARK), the energy metals explorer with a key focus on
uranium, is pleased to note the announcement  today/yesterday  by Group Eleven
Resources Corp. (TSX.V: ZNG; OTCQB: GRLVF; FRA: 3GE) ("Group Eleven"), that it
is mobilising a drill rig to the  Stonepark Zinc Project ("Stonepark")
(Arkle: 22.36%) this week.

A four-hole drill programme totalling 2,700 m is planned, comprising: one hole
at the Stonepark deposit (5.1 Mt grading 11.3% combined Zn and Pb (8.7% Zn,
2.6% Pb), testing beneath known Zn-Pb mineralisation for possible Cu
mineralisation; one hole at the Kilteely prospect; and two holes at or near
the Bruff prospect.

One hole (25-449-04) was drilled late last year at the Bruff prospect to a
depth of 480 m. This hole tested the base of the Waulsortian Limestone near a
suspected fault structure. A significant zone of blocky calcite was
intersected from 194 m to 200 m with a brecciated lower contact, while minor
disseminated pyrite was observed in the 10 m above the base of the Waulsortian
Limestone at 445 m. While assays (recently received by Group Eleven) did not
return anomalous grades, Group Eleven considers the hole is encouraging as it
shows a geological environment prospective for Irish-type zinc mineralisation
(i.e. calcite zones, brecciation and sulphides).

This imminent four-hole programme is part of an expanded Stonepark drilling
programme of approximately 15,500 m, as announced by Group Eleven on 12 March
2026.

In prioritising current exploration capital towards the Company's Namibia
uranium projects, Arkle has elected not to participate in funding this
particular phase of Stonepark drilling. As a result, Arke's interest in
Stonepark is estimated to decrease fractionally from 22.36% to 21.38% (subject
to cost actuals after fieldwork completion). Arkle retains the option to
participate financially in the rest of the drilling programme to maintain its
equity position.

Group Eleven intends to provide further information on this programme later
this year.

Stonepark Zinc Project

Arkle co-discovered the Stonepark zinc deposit in County Limerick - now
Ireland's second largest undeveloped resource - in a joint venture with Teck
Ireland. Teck Ireland's interest was acquired by Group Eleven. Group Eleven
(in which Glencore is a 13.6% shareholder) continues to advance the project
alongside Arkle.

Stonepark is formed of five contiguous prospecting licences covering an area
of 148 km² and is adjacent to Glencore's Pallas Green zinc project, one of
the world's largest undeveloped zinc-lead deposits at 45.4 Mt.

Stonepark has an Inferred Mineral Resource of 5.1 Mt grading 11.3% combined Zn
and Pb (8.7% Zn, 2.6% Pb) - and the deposit remains open along and across
strike. It is higher grade and shallower (190-395 m depth) than the
neighbouring Pallas Green deposit (8.4% Zn+Pb).

Ireland is ranked number one in the world for zinc discovered per square
kilometre. It is home to some of the world's largest and highest-grade zinc
deposits, including Tara (120 Mt+ mined since 1977, Europe's largest zinc
mine), Lisheen (22.3 Mt at 11.7% Zn), and Galmoy (8Mt at 12% Zn).

Six zinc mines have been permitted and operated over the past 60 years, and
every major Irish zinc discovery has been profitably mined. Majors active in
Ireland include Boliden and Glencore.

The joint venture's thesis is that the Carrickittle area within the Stonepark
project may host a "mirror image" of the mineralising system that created
Glencore's adjacent Pallas Green deposit on the opposite side of the Limerick
Volcanic Complex.

In 2022, drilling at Carrickittle West intersected the first major fault
structure directly drilled in the Limerick region - a fault with 150 m of
vertical displacement and zinc mineralisation on both sides.

Three follow-up holes were drilled on Stonepark ground in late 2024, totalling
1,372 m at depths of 350-550 m. Results released in 2025 demonstrated
proximity to strong mineralisation.

Group Eleven's recent focus has been on nearby exploration at its Ballywire
prospect (on a wholly owned Group Eleven licence, southeast of Stonepark)
indicating high-grade Zn-Pb-Ag mineralisation over a 2.6 km trend that remains
open in all directions.

Building on the above geological observations, Group Eleven is mobilising a
rig to Stonepark this week, supplementing the four rigs operating at its
nearby Ballywire prospect.

Group Eleven's announcement can be found here:
https://money.tmx.com/quote/ZNG/news/7179313468668130/Group_Eleven_Drills_235m_of_123_ZnPb_and_46_gt_Ag_Further_Confirms_Deeper_CuAg_Mineralization_and_Extends_Mineralized_Strike_by_600m_to_32km
(https://money.tmx.com/quote/ZNG/news/7179313468668130/Group_Eleven_Drills_235m_of_123_ZnPb_and_46_gt_Ag_Further_Confirms_Deeper_CuAg_Mineralization_and_Extends_Mineralized_Strike_by_600m_to_32km)
.

Rory Harding, Interim Chief Executive Officer, commented:

"Arkle welcomes the update from Group Eleven that it is mobilising a rig to
Stonepark imminently to start a four-hole, 2,700 m phase of drilling. Whilst
Arkle's core focus is on our uranium exploration opportunity in Namibia, zinc
is a critical and strategic mineral and so we consider Arkle's interest in one
of Europe's most prospective zinc projects to be an additional opportunity for
significant value creation for Arkle shareholders. We look forward to further
updates on drilling from Group Eleven in due course."

Contacts:

 Arkle Resources

 Rory Harding, Interim CEO   +44 (0)20 3051 5348

 John Teeling, Chairman      +353 (0) 1 833 2833

 SP Angel Corporate Finance  Nominated Adviser & Joint Broker
 Matthew Johnson

                           +44 (0)20 3470 0470
 Charlie Bouverat

 Adam Cowl

 First Equity Limited        Joint Broker

 Jason Robertson             +44 (0)20 7374 2212

 Vigo Consulting             UK Media & IR
 Ben Simons                  +44 (0)20 7390 0234

 Safia Colebrook             arkle.ir@vigoconsulting.com (mailto:arkle.ir@vigoconsulting.com)

 Teneo                       Ireland Media

 Luke Hogg                   +353 (0) 1 661 4055

 Molly Mooney

 

Glossary

 Ag  Silver
 Pb  Lead
 Zn  Zinc

 

About Arkle Resources

Arkle Resources PLC (LSE:ARK) is a multi-commodity exploration company focused
on metals which are essential for the generation and storage of clean energy -
uranium, lithium and zinc. Its projects are in premier mining jurisdictions in
Namibia, Botswana and Ireland, adjacent to world-class deposits.

Founded in 2004 by John Teeling and Jim Finn, the Company co-discovered the
Stonepark zinc deposit in County Limerick - now Ireland's second largest
undeveloped resource - in joint venture with Teck Ireland. Teck's interest was
acquired by Group Eleven Resources (TSX-V: ZNG), who continue to advance the
project alongside Arkle.

In January 2026, the Company announced a transformative deal to acquire
Namibia Uranium, which has introduced four highly prospective uranium licences
contiguous to major producing and development assets in what is a world-class
uranium jurisdiction.

This acquisition, alongside the Company's existing licence portfolio and the
introduction of new management, repositions Arkle to become a leading explorer
in energy metals.

For more information visit: www.arkleresources.com
(http://www.arkleresources.com)

Follow us on social media:

www.x.com/ArkleResources (http://www.x.com/ArkleResources)

www.linkedin.com/company/arkle-resources-plc
(http://www.linkedin.com/company/arkle-resources-plc)

 

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