OD6 Metals (ASX:OD6) satellite data sharpens 8km fluorspar corridor in Nevada

OD6 Metals has advanced its geological understanding of the Quinn Fluorspar Project in Nevada, with newly completed satellite and airborne hyperspectral analysis outlining a large-scale epithermal alteration system extending over 8km.

The work reframes what were historically discrete fluorspar occurrences into a broader, connected mineral system, providing a more coherent exploration framework as the company progresses toward on-ground exploration.

Highlights

• Advanced satellite and airborne spectral analysis confirms extensive epithermal alteration system
• 8km long regional target alteration zone from Dress Circle to Mammoth
• 1.1km long high intensity alteration zone linking Horseshoe to Jumbo prospects
• Dress Circle: a 2km by 1.8m zone of intense alteration in limestone associated with arcuate features, indicating potential for an intrusive source at depth
• Scale of alteration indicates historic outcropping discoveries potentially join into globally significant target zones along preferred stratigraphic horizons

The Quinn Fluorspar Project is characterised by replacement, breccia and vein style mineralisation hosted in limestones and other carbonate rocks, formed through epithermal processes associated with volcanism approximately 30 to 50 million years ago.

OD6 has applied modern remote sensing techniques, including EnMap satellite imagery with 30m pixel resolution and AVIRIS airborne hyperspectral data with 15m pixel resolution, to map alteration minerals indicative of fluid flow across the system.

The analysis identified phyllic alteration and silicification across the project area, both of which are indicative of hydrothermal activity.

Phyllic alteration is closely associated with replacement and breccia style mineralisation at the Horseshoe and Mammoth deposits, while silicification is associated with felsic dyke swarms and silicified limestone proximal to multiple occurrences including Jumbo, Big Jim, Spar, North Horseshoe and Rocket.

Within the broader system, a 1.1km alteration corridor linking Horseshoe, North Horseshoe and Jumbo has been defined, supported by the identification of alteration minerals including pyrophyllite, alunite-dickite, muscovite-illite and phengite.

These mineral assemblages indicate a strong hydrothermal corridor and provide a basis for targeting potential continuity of mineralisation beneath shallow cover.

The work also identified the “Dress Circle” anomaly, a previously un-explored 1.8 by 2km zone of intense alteration in limestone associated with circular to arcuate structures.

These features are interpreted as indicative of a collapse zone potentially related to an intrusive mineral source at depth, adding a new target area within the project.

OD6 Managing Director Brett Hazelden said the reinterpretation materially enhances targeting confidence:

“The scale of the alteration system, over 8km with intense zones of >1km strike, assists in targeting globally significant fluorspar systems at the Quinn Fluorspar Project.”

The project itself is located approximately 220km north of Las Vegas and includes historical high-grade fluorspar mineralisation exceeding 40% CaF2 at the Mammoth and Horseshoe prospects.

Additional historic rock chip results of up to 94% CaF2 have been reported across the broader project area.

The United States is currently 100% reliant on imports of fluorspar, which is classified as a critical mineral with applications across battery technologies, AI chip manufacture, nuclear fuels, aerospace and defence.

The company is now moving into a due diligence and validation phase, with planned work including systematic surface rock chip and channel sampling, verification of historical assay grades, detailed geological mapping, soil geochemistry, and the development and prioritisation of drill targets.

Permitting for an initial drilling programme is also planned, alongside review of metallurgical sampling requirements.

The transition from isolated historical workings to a defined 8km alteration corridor provides a clearer exploration framework, with next steps focused on sampling, mapping, target generation and permitting for an initial drill programme as OD6 advances toward drilling.

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