OD6 Metals (ASX:OD6) has expanded its Mammoth fluorspar target by more than 50% to over 14,000m2 following revised mapping and sampling at the Quinn Fluorspar Project in Nevada, US.
The target defines a large breccia and stockwork mineralised system extending over 300m strike and up to 100m across. OD6 notes mineralisation remains open to the east beneath talus cover, continues north beneath a silicified limestone cap, and has an untested southern extension.
Channel sampling across exposed benches returned continuous fluorspar mineralisation. Significant results include 44m @ 29% calcium fluoride (CaF2) with a maximum assay of 58.4% CaF2 from the Middle Bench area.
Within Middle Bench, Middle4_Bench returned 32m @ 24.1% CaF2, while Middle3_Bench delivered 12m @ 42% CaF2 with a peak grade of 58.4% CaF2.
Additional results include 33m @ 15.2% CaF2 from Upper2_Bench, 22m @ 20.1% CaF2 from Upper1_Bench, and 15m @ 20.5% CaF2 from Lower1_Bench.
Rock chip sampling returned grades up to 78.3% CaF2 and 54.5% CaF2.
Managing Director Brett Hazelden says the key takeaway from these latest results is ‘scale’.
“Mammoth is rapidly developing into a very different but potentially highly complementary target to the exceptional high-grade mineralisation we have identified at Horseshoe and Big Jim,” Hazelden adds.
“Importantly, we are seeing broad and continuous fluorspar mineralisation across multiple exposed benches.
“These results are particularly encouraging for a target we believe has the potential to develop into a larger-scale, bulk-tonnage-style opportunity.”
With results reinforcing Mammoth as a priority target, Hazelden says the next step is drilling to test geometry, grade continuity, and depth extent.
“This will allow us to […] begin determining the true scale of Mammoth,” he says.
The expanded target footprint is interpreted as a steeply dipping breccia and stockwork body in a dilational zone between northeast-southwest strike-slip fault zones.
“Together with the exceptional grades already demonstrated at Horseshoe and Big Jim, Mammoth adds another dimension to Quinn and further strengthens our view that we are dealing with a significant district-scale fluorspar system in Nevada,” Hazelden shares.
OD6 has now consolidated 100% ownership of 226 mining claims covering approximately 1,890 hectares across the Quinn Fluorspar Project, which contains more than 20 fluorspar occurrences.
The company notes acidspar prices increased approximately 29% over the preceding three quarters to US$654 per tonne ($908 per tonne) in July 2026 amid tightening global supply.
The US remains 100% reliant on imported fluorspar, which is listed on the US Critical Minerals list.
OD6 is undertaking metallurgical and ore-sorting testwork to determine processing pathways for metspar (metallurgical-grade fluorspar) and higher-value acidspar products. The company says permitting programs are also underway.
OD6 Metals is a critical minerals explorer and developer with projects spanning fluorspar, rare earth elements, and copper across the US and Australia.
Write to Paula Fabe at Mining.com.au
Images: OD6 Metals
