Power Minerals Ltd (ASX:PNN) Initial Site Visit Concludes with Completion of First-Phase Sampling Program at Gamma REE-Uranium Project in California
5 November 2025
Highlights:
▪ Power completed first-pass geological reconnaissance at the Gamma Rare Earths-Uranium Project in California, USA, including spot rock and stream sediment sampling as part of the ongoing
due diligence over the project.
▪ Power has executed an option agreement to acquire Gamma1
in the mining-supportive San Bernardino district, southwest of MP Materials’ Mountain Pass Mine, the US’s only rare earth asset in production.
▪ Gamma has good site access and presents very high-grade rare
earth grades up to 20,233ppm TREO (non-JORC 2012) from rock chip
samples.
▪ Power has identified 15 of the 18 historic drilling sites, where
drilling was last completed in 1976, providing an excellent reference point for future exploration.
▪ The project has seen no modern exploration, highlighting the
upside potential to leverage and expand on historic high-grade results.
▪ Historic REE results (non-JORC) from rock chip sampling include:
o 20,233ppm (or 2.02%) total rare earth oxide (TREO), including 10,709ppm (or 1.07%) heavy rare earth oxide (HREO2) in sample 107709
o 16,978ppm (or 1.70%) TREO, including 8,830ppm (or 0.88%) HREO
in sample REE-1
o 12,356ppm (or 1.24%) TREO, including 5,869ppm (or 0.59%) HREO in sample 107710
▪ Historic uranium results (non-JORC) from rock chip sampling include:
o 15,150ppm U (or 1.786% U3O8) in sample JM-03
o 10,300ppm U (or 1.214% U3O8) in sample JM-04
▪ Historic drilling with 6.25m at 1.30% U3O8e from 24.08m depth.
▪ Results from Power’s site visit sampling expected in December 2025.
Overview:
Power Minerals Limited (ASX: PNN, Power or the Company) is pleased to announce it has completed firstpass geological reconnaissance and sampling at the Gamma REE-Uranium Project in California, USA, as part of its ongoing due diligence on the project. The project’s excellent road access allowed Power’s team to locate and re-sample the previous significant HREE mineralised sites.
Power’s team collected a large number of spot rock grab samples during the recent site visit, which have been dispatched to the commercial ALS geochemical laboratory in Reno, Nevada, for full analyses.
Stream sediment samples were also collected and dispatched to the same laboratory to provide benchmark values for further detailed stream sampling programs. The stream sediment samples will undergo comprehensive low trace level analysis using a multi-element methodology. Full QA/QC procedures were implemented for this sampling program, and results are expected in December 2025. Detailed information regarding the samples and location maps will be supplied once the results are available.
While brief, the sampling revealed a range of lithologies intruding the Precambrian basement granite gneiss. The hill slopes are predominantly characterised by extensive boulder scree, making detailed mapping impossible. It is expected that the highly sensitive trace element stream sediment sampling will provide information on the location and extent of the HREE mineralisation.
Subject to the ongoing due diligence results, Power plans to conduct detailed geophysics to assist in mapping the geology and mineralisation beneath the hillside scree.
Company Notes:
“We are excited by our initial site visit to the Gamma Project. Our team made an immediate start to fieldwork, conducting a first-phase grab rock and stream sediment sampling program as part of due diligence for our option to acquire the project, and we look forward to receiving results from that work next month. The site visit confirmed that access to the project is very good, with tracks readily accessible and requiring only minor upgrades to facilitate future drilling and other exploration.
“While the project has seen several phases of exploration in the past, initially for gold followed by uranium, then REE, similar to the history of the nearby Mountain Pass REE Mine, Gamma has not been subjected to any modern exploration, highlighting the project’s exciting exploration and discovery potential. We look forward to advancing our due diligence on the project and reporting on material outcomes over the coming weeks.”
Power Minerals Managing Director Mena Habib
Full ASX Announcement: https://hotcopper.com.au/threads/ann-sampling-program-completed-at-ree-uranium-project-california.8867677/