New board appointment strengthens Locksley’s US antimony supply chain ambitions

• Experienced geologist Ian Stockton appointed non-executive technical director
• Brings expertise from Costerfield and Hillgrove to support Desert Antimony mine development
• Appointment comes as Locksley advances development plans and builds a US-focused antimony supply chain

Special Report: Locksley Resources has strengthened its technical and governance capability with the appointment of veteran geologist Ian Stockton as non-executive technical director.

Stockton brings more than 35 years of global mining, resource development experience  and technical advisory experience, spanning  the full project life cycle from exploration to resource definition, feasibility studies, and operational commissioning.

Of particular interest to Locksley Resources (ASX:LKY) is his experience in antimony project development, including involvement with major Australian deposits such as Costerfield and Hillgrove.

This includes his proven track record in mine development, technical governance, and resource optimisation, guiding projects from discovery through to production.

Stockton’s appointment bolsters the company’s technical execution and resource expansion strategy, supporting development of the Desert Antimony mine and its critical minerals platform.

It also comes as the company transitions from exploration to development and downstream processing as it builds a US-domiciled antimony supply chain.

“Ian brings a wealth of technical and operational experience at a pivotal time for Locksley,” chairman Pat Burke said.

“His practical approach to geological interpretation and project development, coupled with his strong background in industry governance, will be invaluable as we move toward production and establish a vertically integrated US antimony supply chain.”

Stockton’s appointment follows closely on the heels of Kerrie Matthews’ appointment as the company’s CEO at the end of October 2025.

Meanwhile, non-executive director Bevan Tarratt will resign immediately following the AGM on November 28, 2025, though he will provide assistance in an executive capacity during a transition phase to ensure continuity of corporate and project functions.

Development experience

Stockton was involved in the exploration and development of the renowned Costerfield gold-antimony deposit in Victoria, Australia.

He helped bring the Brunswick open pit deposit into production in the late 1990s and has maintained exposure to major global antimony projects through reviews and confidential due diligence on key Australian antimony assets.

This specialised knowledge is directly applicable to advancing the high-grade, previously producing Desert Antimony mine in California’s Mojave Desert.

The project directly abuts claims held by MP Materials, which owns the Mountain Pass mine – the only producing rare earths mine in the US.

It has a JORC 2012-compliant antimony exploration target of 772,000t to 1.382Mt at 2.5%-4.9% antimony, or between 19,400t to 67,700t of antimony metal.

This equates to a gold equivalent exploration target of 290,000oz at 11.7g/t AuEq to 1.02Moz at 22.9g/t AuEq.

A bulk sample with a high head grade of 7.6 to 7.8% antimony is currently undergoing flotation testwork using the same parameters that previously delivered a 68.1% Sb concentrate suitable for industrial and defence applications.

This article was developed in collaboration with Locksley Resources, a Stockhead advertiser at the time of publishing.

This article does not constitute financial product advice. You should consider obtaining independent advice before making any financial decisions.