OD6 Metals Limited (ASX: OD6) — Australian Critical Minerals Company Advancing Fluorspar, Rare Earths and Copper
- Noel Ong
- 2 hours ago
- 10 min read
Big Jim Fluorspar Lode Rediscovered at OD6 Metals Quinn Project, Confirming a Third High-Grade System in Nevada
Samso News | ASX: OD6 | Critical Minerals | Fluorspar — Nevada, USA
This is another reason why Samso has been a keen follower of the OD6 story. The pivoting towards a US-based fluorspar portfolio was a good move, especially at a time when the reality of the "critical minerals" narrative is getting rewarded, especially in the United States.
The United States currently imports 100% of the fluorspar it consumes, with the majority sourced from China. Samso identified OD6 Metals because the Quinn Fluorspar Project sits in Nevada, one of the world's premier mining jurisdictions, and hosts historical grades that are exceptionally high by any fluorspar standard — including 98.6% CaF₂ at the now-rediscovered Big Jim lode.
The project entered the company's portfolio via an option agreement announced in March 2026, and the pace of field work since acquisition has been prompt, as within weeks, the team had relocated a historically documented lode that had not been formally visited in decades. Whether this is it s a fortunate, orchestrated, lucky scenario is irrelevant. Fortune favours the creative is my thought.
The Big Jim rediscovery adds a third extensive fluorspar system to the Quinn Project alongside Mammoth and Horseshoe, expanding the district-scale footprint. The company is now systematically de-risking through sampling, mapping, and drill target definition.
For investors tracking the critical minerals space, the intersection of ultra-high grade, a strategic domestic supply gap, and proximity to the US Strategic Minerals Reserve at Hawthorne is a combination that warrants close attention.
Big Jim Fluorspar Lode Located at Quinn Project: A Third Extensive High-Grade System Confirmed in Nevada as OD6 Metals Defines Its Next Drill Target
Samso News ASX: OD6 | Source: OD6 Metals Limited ASX Release, 12 May 2026
Introduction
OD6 Metals Limited (ASX: OD6) has announced the rediscovery of the Big Jim Fluorspar Lode at its Quinn Fluorspar Project in Nevada, United States. The lode was historically referenced in United States Geological Survey reports and first mined by Frank and Joe "Big Jim" Perkins from 1934. The lode was discovered through targeted field reconnaissance guided by historical descriptions documented as far back as the 1940s.
Its rediscovery in 2026 confirms a third extensive fluorspar system on the Quinn Project tenement, sitting approximately 1km north-northeast of the Horseshoe deposit and complementing the Mammoth and Horseshoe discoveries already identified by the company's exploration team.
Historical reports documented by Goulet and Jones in 1947 recorded fluorspar content of 94.6%, 96%, and 98.6% CaF₂ across the main vein. Visual estimates (Figure 1) made by the company's field team during the 2026 rediscovery are consistent with that historical record, estimating the massive fluorspar vein at 85–95% CaF₂ and the footwall breccia at 40–60% CaF₂.
Figure 1: Big Jim rediscovered in 2026. Location 616125mE, 4221580mN (Datum NAD83, Zone 11)
To place those figures in context, today's economic fluorspar projects generally operate at grades above 20% CaF₂, and some companies indicate that mineralisation at grades above 8% CaF₂ can be considered economic. The Big Jim main vein, which is clearly exposed at surface with a width of approximately 2 metres, sits an order of magnitude above the general threshold for economic viability.
The United States currently imports 100% of the fluorspar it consumes domestically, with approximately 68% of global supply sourced from China. Fluorspar is listed as a critical mineral by the United States Geological Survey, with applications spanning hydrofluoric acid production, AI semiconductor chip etching, advanced battery technologies, nuclear fuel processing, and aerospace and defence applications.
The Quinn Fluorspar Project sits approximately 300km by road from the US Strategic Minerals Reserve at Hawthorne, Nevada, a geographic context that the company has consistently flagged as part of the strategic case for domestic fluorspar development (Figure 2).
Figure 2: Quinn Fluorspar Location in Nevada.
Highlights
Key Historical Assay Results — Big Jim Fluorspar Lode (Goulet & Jones, 1947)
Big Jim is situated about 1 km NNE of the Horseshoe Fluorspar Deposit. It was discovered and intermittently mined by Frank and Joe "Big Jim" Perkins starting in 1934.
Table 1: Key Historical Assay Results — Big Jim Fluorspar Lode (Goulet & Jones, 1947) Source: OD6 Metals ASX Release, 12 May 2026. Historical results from Goulet & Jones, 1947, compiled by Competent Person Dr Darren Holden (Fellow, AusIMM). Visual estimates are not a substitute for laboratory results and should not be relied upon. Assay results are historic in nature and whilst consistent with surface observations should not be relied upon pending new laboratory confirmation.
A 1947 report by Goulet & Jones described the Big Jim lode as a shallow dipping, high-grade lode over 6 feet (2m) wide. The workings reported grades of 94.6%, 96%, and 98.6% from the vein (Figure 3). See Table 1 below for some key assay results.
Figure 3: Schematic Geological Cross-section of Big Jim geology. Widths are schematic for illustration purposes with the massive fluorspar estimated at 2m, and the footwall breccia at least 2m (lower contact not observed).
Management Commentary
What the Company's Leadership Said About the Big Jim Rediscovery
Brett Hazelden, Managing Director of OD6 Metals, attributed the rediscovery to targeted geological detective work by the company's Nevada-based team, drawing on historical descriptions in documents dating back to the 1940s to narrow the search area.
Brett Hazelden characterised Big Jim as the company's highest-grade target to date at the Quinn Project and confirmed it represents a third extensive fluorspar system alongside Horseshoe and Mammoth, each of which is now a target for the drill-out program.
He described the visual estimates of size and grade as consistent with the historical reports, lending confidence to the company's assessment of the lode's potential. Hazelden framed the discovery specifically within the context of OD6's strategic objective: to develop a US-based, high-grade fluorspar asset that can contribute to domestic supply at a time when US demand for the mineral is structurally unsupported by any domestic production.
"Big Jim perhaps is our highest-grade target to date. This discovery validates our ambition to be a US-based high-grade fluorspar developer coinciding with increasing strategic demand for US domestic supply."
— Brett Hazelden, Managing Director, OD6 Metals Limited
The geological commentary in the release is notable for its specificity about what remains open. The footwall breccia base contact was not observed during the field visit, which means its true width is not yet confirmed. This may mean that the true width may be thicker than the approximately 2 metres currently visible. The system is described as open to the north and south beyond the 220 metres of historic workings that have been mapped (Figure 4).
A third lode, approximately 20 metres beneath Big Jim, reported by Goulet and Jones in 1947, has not yet been located. Each of these represents an aspect of the system that remains to be tested through further field work and, ultimately, drilling.
Figure 4: Schematic geological map of the Big Jim area based on recent field visit. Not all historic workings were located at surface, and their position is estimated based on geographically referencing Figure 3. (source: OD6 Metals Limited)
Near-Term Milestones to Watch
What Investors Should Monitor Following the Big Jim Rediscovery Announcement
Samso Concluding Comments
The 12 May 2026 announcement from OD6 Metals is best understood as a field validation of a historically documented deposit, combined with the definition of a new drill target within a growing district-scale fluorspar system. The company is not reporting a new discovery in the geological sense, as Big Jim was mined from 1934 and formally documented in 1947.
As far as I understand, the field team has physically located it in 2026, confirmed that the surface exposure is consistent with historical descriptions, collected samples for laboratory confirmation, and identified the geological geometry that defines the depth drill target. As an exploration practitioner, sometimes, situations like this are a greater boost to the project development than what meets the eye. A "discovery" of something like Big Jim can add to the big picture in terms of prospectivity. The bonus is the ability to confirm the grades that are in the historical books (Figure 5).
Figure 5: Annotated mine sketch map with historic results (Goulet & Jones, 1947) for AFW Carlson of Bishop, California
The grade context deserves emphasis. Fluorspar is unusual among critical minerals in that its commercial grade threshold is well-established and widely published. Existing projects are generally considered economic above 20% CaF₂, with some operators citing 8% CaF₂ as a minimum. The Big Jim main vein has historically recorded 94.6%, 96%, and 98.6% CaF₂ and the footwall breccia material that was historically dismissed as uneconomic "gangue" at 60% CaF₂ would itself be considered high-grade by the standards of today's operating projects.
The company has explicitly noted this point in the release, observing that material once considered commercially valueless now represents a potentially valuable fluorspar source by modern economic standards. This is a meaningful observation: it suggests the economic inventory at Big Jim may be larger than the historic operators recognised.
The structural geometry of the Big Jim system is also worth noting as an investor consideration. The lode dips shallowly to the west at approximately 32 degrees, which is a geometry that, as the company's schematic cross-section illustrates, places the mineralisation directly beneath the jasperoidal lithocap at accessible depths.
A jasperoidal lithocap is a large, erosional, silica-rich capping layer that forms at or near the surface in an epithermal/hot spring system, characterized by intense silicification. It represents a "cap" of altered rock—often replacing limestone or dolomite—that overlies deeper porphyry copper-gold mineralization.
------- University of Tasmania, "Lithocaps - characteristics, origins and significance for porphyry and epithermal exploration"
This is a more tractable drill target than a steeply dipping vein that requires deep drilling to intercept at depth. The shallow dip also has implications for potential mining geometry, should the project advance to that stage: flat-lying or gently dipping ore bodies are generally more amenable to open-pit or shallow underground extraction than steep systems. Don't get excited, this is still an early-stage project
What will Make This A Economical Fluorspar Project?
The open questions at this stage are the ones that assays and drilling will resolve. The laboratory results from the 2026 rock chip samples will confirm or refine the visual grade estimates. The geological mapping program will clarify the strike extent and depth continuity of the system beyond the 220 metres of historic workings.
The soil geochemistry program will define the geochemical footprint of Big Jim and the surrounding prospects. And when drilling eventually commences — subject to US Forest Service permitting — it will test whether the historical high grades persist at depth beneath the lithocap. Each of these steps is a discrete, measurable milestone.
Investors tracking OD6 Metals and the Quinn Fluorspar Project should watch for the assay results as the next near-term data point, followed by any disclosure on the geological mapping and drill permitting timeline.
The company is moving quickly and the March 2026 option agreement suggests an intent to advance the project systematically and disclose results as they come to hand.
About OD6 Metals Limited
OD6 Metals Ltd (ASX: OD6) is an Australian public company pursuing exploration and development opportunities across the critical minerals sector, with a portfolio spanning fluorspar, rare earth elements, and copper.
Its flagship rare earth asset is the Splinter Rock Project in Western Australia's Esperance-Goldfields region, which hosts one of Australia's largest clay-hosted rare earth deposits with an Indicated Resource of 119Mt at 1,632ppm TREO and an Inferred Resource of 563Mt at 1,275ppm TREO.
In fluorspar, the company holds an option to acquire the Quinn Fluorspar Project located approximately 220km north of Las Vegas, Nevada — a project with documented high-grade mineralisation across multiple systems, including Mammoth, Horseshoe, and now the rediscovered Big Jim lode, each exhibiting grades well above the economic threshold for fluorspar development. The company also holds the Gulf Creek Copper-Zinc VMS Project near Barraba in New South Wales.
Previous Samso News Coverage
Samso has followed OD6 Metals Ltd across multiple ASX releases. The following represents our prior published coverage of the company:
April 05, 2026 -
April 17, 2026 -
March 18, 2026 -
December 19, 2025-
November 08, 2025-
September 10, 2025-
August 24, 2025 -
August 13, 2025
August 22, 2023
The Samso Way – Seek the Research
Here at Samso, we pride ourselves on delivering content for investors that is independent and informed by over three decades of experience in the industry. Our content is well-researched and is only created if I see merit in discussing the company's story.
Our mission is simple: cut through the noise and spotlight what matters—genuine stories, grounded insights, and real opportunity.
Our content is well-researched and is only created if the team sees merit in discussing the company or concept. Investors can explore our three core platforms:
There may be numerous paths to success in investing, but the common thread among successful individuals is that they remain committed to making informed decisions. Equip yourself with the right knowledge and tools, and you will be well on your way to achieving your financial goals.
Most importantly, investors need to be absolutely diligent in understanding their own risk-reward tolerance and capabilities. Never bite off more than you can chew. As they say, Rome wasn’t built in a day, and the Great Wall stood because it took centuries to complete.
The Samso Philosophy:
Stay curious. Stay sharp. And remember—digging deeper always uncovers the real value.
In Life, there is no such thing as a Free Lunch.
Never bite off more than you can chew is my parting comment.
Happy Investing, and the only four-letter word you need to know is DYOR.
To support our independent nature of our work, please head over to our Support Page and give us a helping hand in any of the ways listed. This is a new initiate for the Samso Platform, and it was always the concept of Samso when we started this journey in 2018.
Disclaimer
The information or opinions provided herein do not constitute investment advice, an offer, or solicitation to subscribe for, purchase, or sell the investment product(s) mentioned herein. It does not take into consideration, nor have any regard to your specific investment objectives, financial situation, risk profile, tax position and particular, or unique needs and constraints.
Share to Grow: Your Bonus
Samso has just released an eBook: How to Add Value to your Share Portfolio
|A lesson on geological models sought by mining companies that gives insight and an understanding of which portfolios are better - and potentially more lucrative – investments. Click here to download this eBook.|
If you find this article informative and useful, please help me share the information. I try to write about topics that are interesting and have the potential to be of investment value. It is not easy to find stories that fit those parameters. If you or your organisation sees the benefit of what Samso is trying to achieve and has a need to share your journey, please contact me at noel.ong@samso.com.au.
Samso is a trusted platform that equips dedicated investors with up-to-date industry knowledge and insights from top CEOs and thought leaders. By staying informed on business advancements and market trends, investors can enhance their financial decisions through a combination of expert guidance and their own research.
Samso News | www.samso.com.au | An Investor Lens on ASX-Listed Companies
Comments