Locksley Provides Update on its Collaboration with Columbia University to Advance Rare Earth Processing Pathways for its Mojave Project in California

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Locksley Resources (OTCQX: LKYRF) updated its research collaboration with Columbia University to develop processing pathways for recovery, separation and metallization of rare earth elements from carbonatite and bastnasite-style mineralisation at its Mojave Project in California.

Work led by Professor Greeshma Gadikota will next test Locksley samples alongside maiden exploration at El Campo to assess downstream flowsheet options. The company also referenced a separate research program with Rice University on antimony concentrate production.

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SAN BERNARDINO, Calif., April 29, 2026 /PRNewswire/ -- Locksley Resources Limited (ASX: LKY, OTCQX: LKYRF) announced today that its research collaboration with Columbia University, continues to support the company's understanding of potential processing routes for its carbonatite-related mineral systems located at the Company's Mojave Project in California.

The research collaboration, being led by Professor Greeshma Gadikota at Columbia's Department of Earth and Environmental Engineering and Columbia Climate School, is focused on developing potential processing pathways for the recovery, separation and metallization of rare earth elements and associated critical metals from carbonatite and bastnasite style mineral systems, including the mineralization style relevant to Locksley's El Campo REE project within its Mojave Project in the Mountain Pass region.

"The work completed to date has provided us with alternative processing routes aimed at simplifying downstream flowsheets that can be evaluated for our project," said Kerrie Matthews, Managing Director and CEO of Locksley. "The next phase of this partnership will use Locksley samples and assess the implications of these results for future consideration. Of key importance is that this work is being conducted in parallel with maiden exploration at El Campo, enabling us to better understand all the potential development pathways as the project advances."

Additional details on the project and work conducted to date can be found here: https://cdn-api.markitdigital.com/apiman-gateway/ASX/asx-research/1.0/file/2924-03083570-6A1322598&v=undefined.

This collaboration is one of several Locksley has in place. Earlier this month the company reported on its advancement toward production of high purity antimony concentrate and next-generation materials as a result of its sponsored research program with Rice University in Texas.

Locksley Resources Limited (https://www.locksleyresources.com.au) is focused on critical minerals in the US. 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 reestablishing 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.

The Company's Mojave Project is located adjacent to MP Materials Mountain Pass Mine and mill, the only REE producing mine in the United States to date.

View original content:https://www.prnewswire.com/news-releases/locksley-provides-update-on-its-collaboration-with-columbia-university-to-advance-rare-earth-processing-pathways-for-its-mojave-project-in-california-302756468.html

SOURCE Locksley Resources

FAQ

What is Locksley (LKYRF) collaborating on with Columbia University for the Mojave Project?

They are developing potential processing pathways for recovery, separation and metallization of rare earth elements. According to the company, Columbia's team is testing methods on carbonatite and bastnasite-style mineralisation relevant to El Campo to simplify downstream flowsheets.

How will Columbia's research affect Locksley (LKYRF) exploration at El Campo?

Columbia's work will provide processing-route data that can inform project development decisions. According to the company, the next phase will test Locksley samples in parallel with maiden exploration to assess implications for flowsheet selection and potential downstream options.

Does the Locksley (LKYRF) update include production or financial guidance for the Mojave Project?

No, the update does not include production forecasts or financial guidance. According to the company, the release describes research on processing pathways and parallel exploration, without disclosing production timelines, revenue estimates, or capital plans.

What specific mineralisation styles are being studied for Locksley (LKYRF) by Columbia University?

The research focuses on carbonatite-related and bastnasite-style mineral systems relevant to El Campo. According to the company, these styles inform recovery and separation tests aimed at tailoring downstream metallurgical flowsheets for the Mojave Project.

Is Locksley (LKYRF) working with other research partners besides Columbia University?

Yes. According to the company, Locksley has multiple sponsored research partnerships, including a recent program with Rice University on producing high-purity antimony concentrate and next-generation materials tied to its US critical minerals strategy.