Critical Mineral Stock Locksley Resources Limited (OTCQX: LKYRF) ADVANCES TOWARD U.S ANTIMONY PRODUCTION

Published on Nov 13, 2025

Locksley Resources geological model showing DAM Main and DAM North antimony zones with 800m strike length, 250m vertical extent, existing adits and planned drilling at the Desert Antimony Mine

Fast-track execution positions Locksley at the forefront of restoring America's antimony supply chain and processing capabilities

(www.investorideas.com Newswire) Critical Minerals and Antimony Stock News - Locksley Resources Ltd (ASX: LKY, OTCQX: LKYRF, FSE: X5L) just announced advancements with its US Mine-to-Market strategy. The Company has delivered numerous key technical milestones including LiDAR based underground modelling, metallurgical processing updates, a Bulk Sample, underground workings assessment and maiden Exploration Target (JORC 2012). These milestones have provided Locksley with the confidence to fast track the redevelopment plans and initiate extraction studies of mineralisation at the Desert Antimony Mine (DAM) Prospect.

From Target Validation to Extraction

The Company has advanced planning for a targeted, integrated work plan designed to fast-track extraction of mineralisation for Locksley’s Phase 1 pilot processing facility, planned for 2026. These results have collectively provided the Company sufficient confidence to progress plans towards re-development of the historical mine. With enhanced knowledge of the geology, metallurgy, and underground access now in place and continually developing, Locksley has commenced early-stage small scale production planning.

Geological Targeting at DAM

Underground LiDAR surveying has mapped ¬236m of historical workings confirming Sb vein continuity, supported by 3D geological modelling, structural mapping, and sampling sequencing that have enabled the Company to establish an Exploration Target (JORC 2012) at DAM containing between 19,400 to 67,700 tonnes of antimony metal (see basis for the exploration target below). This provides a framework to establish a conceptual development plan to provide feed for a pilot plant which is envisaged in 2026. This initial work provides a basis for the scale of operation which would be required and allows conceptual planning and design to be undertaken.

Metallurgy (Bulk Sample)

The recently completed 325 kg bulk sampling has delivered a head grade averaging 7.6% to 7.8% Sb. Flotation has commenced using the same parameters determined in the initial sighter testwork campaign which successfully demonstrated the ability to produce a premium antimony concentrate grading 68.1% Sb (see ASX Announcement 22 September 2025). This metallurgical success provides the foundation for the MoU signed with Hazen and validates the Company's processing pathway, significantly establishing the technical pathway for the downstream supply chain. The results have established the potential and quality of concentrates that can be produced from the mineralisation encountered at DAM, which is another key step towards a potentially viable production operation.

Underground Assessment

With an increasing and developing understanding in the geology and metallurgy, Locksley liaised with a specialist U.S. based underground development consultant to provide an opinion of the historical DAM workings. The assessment indicates the structural stability and accessibility of the workings, providing a potential plan for future re-entry and development of the mineralisation exposed in the underground faces (Figure 1).

Downstream Capability (Processing & Refining)

The restart pathway complements Locksley’s downstream strategy, including its collaboration with Rice University to develop advanced antimony extraction technology using DeepSolvTM. Together with the MoU signed with Hazen Research for U.S. based processing capability, Locksley is building a fully integrated mine-to-market platform aligned with American industrial, defence, and energy sectors.

The advancement of the Desert Antimony Mine Prospect comes at a pivotal time for the United States, with antimony confirmed as a priority under federal supply chain resilience frameworks. Locksley’s progress directly supports US objectives to rebuild domestic sources of defence-essential materials.

Kerrie Matthews, Managing Director CEO, commented:

“This is a pivotal moment for Locksley, marking the rapid advancement towards the Company becoming a Developer, with an end-to-end supply chain strategy from Mine-to-Metal. All technical steps, from establishing the exploration target, to achieving the 68.1% concentrate grade and to evaluating the underground workings aligns with this strategy.

The successful execution of these three integrated phases has significantly advanced the Company towards mitigating the key uncertainties associated with planning for recommencing operations. We are focused on further enhancing our understanding of DAM and working in parallel with US government on permitting, finance, and ultimately physically delivering antimony product into the US market.”

Full news:

https://investors.locksleyresources.com.au/announcement-detail/Locksley-Advances%20Toward%20U-S-%20Antimony%20Production-NzQ2NQ

For Further Information:
Kerrie Matthews
Chief Executive Officer
T: +61 8 9481 0389
E: Kerrie@locksleyresources.com.au

About Locksley Resources Limited

Locksley Resources Limited is focused on critical minerals in the United States of America. The Company is actively advancing the Mojave Project in California, targeting rare earth elements (REEs) and antimony. Locksley is executing a mine-to-market strategy for antimony, aimed at re-establishing domestic supply chains for critical materials, underpinned by strategic downstream technology partnerships with leading U.S. research institutions and industry partners. This integrated approach combines resource development with innovative processing and separation technologies, positioning Locksley to play a key role in advancing U.S. critical minerals independence.

Jane Morgan
Investor and Media Relations
+61 405 555 618

LOCKSLEY (ASX: LKY) (OTCQX: LKYRF) is a featured showcase mining stock at Investorideas.com

https://www.investorideas.com/CO/LKYRF/

Research mining stocks at Investorideas.com with our free mining stocks directory at Investorideas.com

Exploring Mining Podcast with Investorideas - get mining stock news from TSX, TSXV, CSE, ASX, NASDAQ, NYSE companies plus interviews with CEO's and leading experts

Check out the Exploring Mining podcast by Investor Ideas for the latest mining stock news and insightful interviews with top industry experts

About Investorideas.com - Big Investing Ideas

Investorideas.com is the go-to platform for big investing ideas. From breaking stock news to top-rated investing podcasts, we cover it all.

Advertising agencies - Learn more about digital advertising and guest posts at Investorideas https://www.investorideas.com/Advertise/

Follow us on X @investorideas @stocknewsbites
Follow us on Facebook https://www.facebook.com/Investorideas
Follow us on YouTube https://www.youtube.com/c/Investorideas

Contact Investorideas.com
800 665 0411

Disclaimer/Disclosure: Locksley Resources Limited is a paid featured mining stock on Investor ideas More disclosure: Investorideas.com is a digital publisher of third party sourced news, articles and equity research as well as creates original content, including video, interviews and articles. Our site does not make recommendations for purchases or sale of stocks, services or products. Nothing on our sites should be construed as an offer or solicitation to buy or sell products or securities. All investing involves risk and possible losses. This site is currently compensated for news publication and distribution, social media and marketing, content creation and more. More disclosure: Contact management and IR of each company directly regarding specific questions.