Locksley REE and antimony exploration expands near Mountain Pass in Mojave

Locksley Resources

Locksley REE and antimony exploration is accelerating in California’s Mojave Desert near Mountain Pass. The Locksley REE and antimony exploration program now covers more than 40km², directly adjacent to North America’s only rare earths mine. As a result, Locksley REE and antimony exploration gives investors leveraged exposure to a strategic US critical minerals district.

High-grade REE target beside Mountain Pass

Locksley’s Mojave Project anchors its rare earth strategy through the El Campo prospect. El Campo sits just 1.4km from MP Materials’ Mountain Pass operation, highlighting strong geological potential. Early work has returned grades up to 12.1pc total rare earth oxides and 3.2pc neodymium-praseodymium.

The El Campo site is already fully permitted, which reduces early-stage timeline risk for the company. Therefore, Locksley can move quickly from surface mapping into subsurface testing. Drilling is scheduled for the third quarter of this year to test depth continuity and tonnage potential. Success could position El Campo as a satellite or complementary rare earth source within the broader Mountain Pass district.

Locksley has also identified a historical shaft during recent surface mapping at Mojave. The shaft, estimated to exceed 15m, is now undergoing detailed evaluation. This work may reveal previously undocumented underground workings or mineralised zones that could guide future drill targeting.

Desert Antimony targets domestic US antimony revival

The Desert Antimony prospect gives the Mojave Project a second critical minerals pillar. It builds on a historic antimony mine with extensive surface mineralisation. Recent assays show grades reaching 46pc antimony in outcropping quartz-calcite-stibnite veins. Such grades are highly significant for a strategic metal with constrained Western supply.

Locksley is advancing drilling and permitting at Desert Antimony to support potential domestic antimony revival. Antimony is essential for flame retardants, alloys and some defence applications, making US supply diversification a policy priority. Meanwhile, combining REEs and antimony within one project portfolio increases strategic relevance for potential partners.

By consolidating ground around these prospects, Locksley strengthens its position in a heavily scrutinised critical minerals corridor. The enlarged land package also improves the chances of discovering additional REE or antimony targets. Over time, this could support a district-scale development concept rather than isolated deposits.

The Metalnomist Commentary

Locksley’s move in the Mojave shows how juniors can leverage location next to established assets to accelerate critical minerals stories. The combination of high-grade REE results near Mountain Pass and very strong antimony assays creates genuine strategic optionality. Market participants should watch upcoming drill results and any early interest from larger REE or defence-linked groups as key tests of project quality.