OD6 adds two historic mines to Nevada fluorspar district

OD6 moves to control Quinn’s historic fluorspar ground

OD6 Metals (ASX:OD6) is paying a relatively modest price to assemble a much larger Nevada fluorspar footprint. The company has agreed to acquire the historic Rainbow and Nyco mines for US$89,166 in cash, approximately A$127,500, plus 480,000 OD6 shares, subject to customary conditions and government consents.

Completion would give OD6 a 100% interest in every historic fluorspar mine in the Quinn district, according to the company. Including 11 additional Nevada claims staked around Rainbow and Bruno, the expanded landholding would comprise 257 claims covering approximately 2,135 hectares. The transaction is expected to complete in the coming weeks, although either party can terminate if conditions remain unresolved by 31 December 2026.

Surface grades strengthen the case for maiden drilling

Rainbow is the more advanced of the two acquisitions from an OD6 exploration perspective. The company confirmed historic workings extending across about 850 metres and collected a rock chip sample grading 89.6% CaF2 from a roughly one-metre-wide shear vein. Altered volcanic rock beside the main structure also returned 53.6% and 7.2% CaF2, pointing to possible fluorite-bearing stockwork or halo mineralisation beyond the principal veins.

The latest results add to a run of high-grade surface observations across Quinn. Samples at Red Bluff returned up to 99.9% CaF2, while Bruno produced results of 97.2% and 92.1% CaF2. That exploration push now sits alongside the company’s proposed 10,000-metre drilling plan, which outlined up to 139 drill pads across the broader project.

Historic production offers clues, not a resource

Rainbow was reportedly the first fluorspar producer in the district, with published records citing about 200 tonnes shipped in 1945 and 1946. Nyco’s records cite roughly 1,100 tonnes of historic production at 50% CaF2, supported by an upper adit of almost 122 metres and a second adit about 21 metres long. Those figures have not been verified by OD6, were compiled before the JORC Code and cannot be treated as a Mineral Resource or Ore Reserve.

Nyco is the less tested proposition. OD6 has not yet visited the site and has reported no new Nyco sampling results. The company’s immediate work is instead focused on reviewing workings, mapping and considering trenching at the Rainbow-Bruno area, which sits primarily on Bureau of Land Management land. OD6 says that tenure offers a relatively rapid permitting pathway for ground-disturbing work, but approvals remain necessary.

Acquisition expands the hub-and-spoke ambition

OD6’s strategic pitch is to combine narrow, very high-grade vein targets such as Rainbow, Bruno and Red Bluff with broader replacement, breccia and stockwork targets elsewhere in Quinn. The company says this mix could support a centralised processing and production operation, including a possible direct-shipping Metspar product before any larger flotation circuit for premium Acidspar.

That remains a development concept rather than an established pathway. The reported assays are selective surface rock chips, do not establish true widths or continuity, and no drilling has yet tested the system at depth. The company has also cautioned that its proposed exploration and bulk-sampling programs remain subject to permitting, even after the project entered the FAST-41 permitting framework, which provides federal coordination and milestone visibility but does not guarantee approval.

The next useful evidence will come from trenching and drilling, not another isolated peak assay. Rainbow’s 850-metre surface strike, the untested depth potential and Nyco’s unverified historic records leave OD6 with a larger and more coherent district package, but also a substantial conversion task: turning attractive outcrops and old workings into repeatable widths, continuity and eventually a JORC-compliant inventory.