OD6 Metals has reported exceptional assay results from the Mammoth prospect within its Quinn Fluorspar Project in Nevada, confirming high-grade fluorspar mineralisation up to 53.2% CaF2 and indicating potential for a broader mineralised system.
- Exceptional rock chip assays up to 53.2% CaF2 at Mammoth prospect
- Mineralisation extends beyond previously mapped breccia zone to west, north, and east under cover
- Results validate historic data and confirm large-scale high-grade fluorspar system
- Systematic exploration planned including surface sampling, geological mapping, and drill targeting
- Project strategically important given US reliance on fluorspar imports and critical mineral status
Exceptional Assay Results at Mammoth Prospect
OD6 Metals Limited (ASX:OD6) has announced initial assay results from the Mammoth prospect, part of its Quinn Fluorspar Project in Nevada, USA. The rock chip sampling program returned exceptionally high-grade fluorspar mineralisation, with assays up to 53.2% calcium fluoride (CaF2) over a prospective 9,000-metre target zone. Other notable assay results include 43.8%, 33.8%, and 32.9% CaF2, confirming the presence of a substantial high-grade fluorspar system.
The mineralisation was identified in breccia and surrounding limestone, with grades up to 32.9% CaF2 in limestone indicating the mineralised zone extends beyond the previously mapped breccia body to the west and north. Geological indicators also suggest potential extensions to the east beneath untested cover, highlighting the possibility of a broader mineralised system.
Validation of Historic Data and Strategic Importance
These results validate historic data from previous exploration and sampling campaigns, including rock chip results reported up to 94% CaF2 in the wider Quinn Fluorspar Project area. OD6’s Managing Director, Brett Hazelden, noted that the grades compare favourably with globally significant fluorspar deposits and emphasised the potential scale of the system beyond earlier mapped zones.
The Quinn Fluorspar Project is located approximately 220 kilometres north of Las Vegas, Nevada, in a jurisdiction regarded as one of the world’s premier mining regions. The United States currently imports 100% of its fluorspar supply, a mineral listed as critical due to its applications in advanced battery technologies, AI semiconductor chip etching, nuclear fuel processing, and aerospace and defence sectors.
Planned Systematic Exploration and Next Steps
OD6 Metals has outlined plans to advance exploration systematically across the Quinn Fluorspar Project. Activities will include comprehensive surface rock chip and channel sampling, detailed geological mapping, structural interpretation, soil geochemistry sampling, and prioritisation of drill targets. The company also intends to commence permitting processes for an initial drilling program and review metallurgical sampling requirements.
Dr Darren Holden, OD6’s Geological Advisor, is scheduled to be on site shortly to guide the exploration program and support drill targeting efforts. The company reports it is well funded to accelerate these activities, with additional assay results from various prospects pending and expected to be released progressively.
Context Within OD6 Metals’ Portfolio
The Quinn Fluorspar Project complements OD6 Metals’ broader portfolio, which includes the Splinter Rock Project in Western Australia, hosting one of Australia’s largest clay-hosted rare earth deposits, and the Gulf Creek Copper-Zinc VMS Project in New South Wales. The company’s focus on critical minerals aligns with growing global demand and strategic supply considerations.
OD6’s recent announcements have detailed the launch of modern exploration at Quinn, identification of an 8-kilometre epithermal alteration corridor, and significant claim expansions around the project area, underscoring the company’s commitment to unlocking the project’s potential. These developments provide additional context for the current assay results and planned exploration activities.
Bottom Line?
While the initial assay results confirm high-grade fluorspar mineralisation with promising expansion potential, further exploration and permitting will be critical to defining the project's scale and economic viability.
Questions in the middle?
- How will forthcoming drilling results refine the understanding of the mineralisation's extent and continuity at Mammoth?
- What are the timelines and potential challenges for securing permits required for drilling on federal land?
- How might OD6 Metals’ Quinn Fluorspar Project impact the US fluorspar supply chain given current import reliance?