OD6 Metals Limited (ASX:OD6) Quinn Fluorspar assays confirm low-impurity profile across Horseshoe and Mammoth

OD6 Metals has reported multi-element assay results from channel sampling at the Horseshoe and Mammoth deposits within its Quinn Fluorspar Project in Nevada, outlining high-grade fluorspar mineralisation accompanied by consistently low levels of deleterious elements relevant to downstream processing and product specification pathways.

Highlights

• Horseshoe averages 70.9% CaF₂ from 20 channel samples, with peaks to 82% CaF₂
• Mammoth averages 40.8% CaF₂ from 12 channel samples
• Low concentrations of Pb, Zn, Cu, As, Cd, Cr, U and Th reported across both deposits
• Uranium and thorium reported below detection limits at Horseshoe
• Sulphur levels below stated industry thresholds for MetSpar and AcidSpar specifications
• Horseshoe exceeds >60% CaF₂ MetSpar threshold prior to processing
• Ore sorting and flotation identified as potential upgrading pathways to >97% CaF₂ AcidSpar product
• United States currently imports 100% of fluorspar consumption and classifies fluorspar as a critical mineral

At Horseshoe, channel sampling returned an average grade of 70.9% CaF₂ across 20 samples, with a peak value of 82% CaF₂.

Mammoth returned an average of 40.8% CaF₂ across 12 samples, with both datasets derived from surface channel sampling and not representing resource or reserve estimates.

Multi-element results at Horseshoe show lead at 3.75 ppm, zinc at 8.6 ppm, copper at 1 ppm, arsenic at 23.4 ppm, sulphur at 130 ppm, uranium below 10 ppm and thorium below 20 ppm on average.

The announcement notes uranium and thorium are below detection limits and sulphur is below referenced thresholds for acid-generating waste risk.

At Mammoth, average results include lead at 5.5 ppm, zinc at 5.9 ppm, copper at 3 ppm, arsenic below 0.5 ppm, sulphur below 100 ppm, uranium at 10 ppm and thorium below 20 ppm. Silica averages 38.1%, with calcium carbonate identified as the dominant non-fluorspar calcium component.

The Company states Horseshoe material exceeds the minimum >60% CaF₂ requirement for MetSpar prior to processing.

AcidSpar specifications are defined as >97% CaF₂ with strict limits on silica, arsenic, sulphur and phosphorous, with penalties potentially applied for elevated deleterious elements including lead and other base metals.

OD6 Metals Managing Director Brett Hazelden said:

“These results reinforce our belief that Quinn has the potential to become one of the highest-grade fluorspar projects in North America.”

The Company outlines ore sorting and flotation as the principal upgrading pathways under consideration to produce MetSpar and AcidSpar products, with both deposits reported to contain low sulphur levels which the announcement links to reduced acid generating waste risk, and uranium and thorium reported below detection limits at Horseshoe.

OD6 notes the United States imports 100% of its fluorspar requirements and classifies fluorspar as a critical mineral used in hydrofluoric acid production and industrial manufacturing applications.

Planned metallurgical work includes ore sorting testwork with TOMRA in Germany and flotation optimisation with Core Resources in Australia, with results expected in the second half of the year.

OD6 Metals is advancing metallurgical testwork and bulk sampling applications across the Quinn Project to support further processing studies, with ore sorting and flotation testwork forming the basis of upcoming validation programs for MetSpar and AcidSpar product pathways.