Anson Reports 103,000 Tonnes LCE in Maiden Green River Lithium Resource
Anson Resources has announced its first JORC-compliant lithium resource estimate for the Green River Project in Utah, revealing significant lithium-brine volumes and plans to expand via historic well re-entry.
- Maiden JORC lithium resource estimate based on Bosydaba #1 well drilling
- Indicated and inferred lithium-brine resources total approximately 103,000 tonnes LCE
- Approval granted to re-enter historic Mt Fuel-Skyline Geyser well to expand resource
- Project targets lithium extraction from Leadville Limestone aquifer using Direct Lithium Extraction (DLE)
- Further exploration and hydrological testing planned to refine resource and extraction potential
Maiden Resource Marks a Milestone
Anson Resources Ltd (ASX, ASN) has taken a significant step forward in its lithium ambitions with the completion of a maiden JORC Mineral Resource estimate for its Green River Lithium Project in southeastern Utah, USA. The estimate, derived from drilling data at the Bosydaba #1 well, covers just under a quarter of the project area but already outlines a substantial lithium-brine resource hosted within the Mississippian Leadville Limestone aquifer.
The resource delineation includes an indicated category containing 4,000 tonnes of elemental lithium (equivalent to 19,000 tonnes of lithium carbonate equivalent, LCE) and an inferred category with 16,000 tonnes of elemental lithium (84,000 tonnes LCE), combining for a total of approximately 103,000 tonnes LCE. This initial figure provides a foundation for the project’s potential as a lithium supplier amid growing global demand for battery metals.
Historic Well Re-entry Could Unlock More
Crucially, Anson has secured approvals from both federal and state authorities to re-enter the historic Mt Fuel-Skyline Geyser well, a move expected to significantly expand the resource base. This well, located within the project’s broader landholding, offers an opportunity to deepen understanding of the aquifer’s extent and lithium content. Pending assay results from this re-entry could materially increase the overall mineral resource estimate.
The project benefits from a mature oil and gas district setting, with extensive historical well data providing valuable geological and hydrogeological context. The Leadville Limestone is characterized by excellent porosity and permeability, favorable for lithium-brine accumulation and extraction.
Innovative Extraction Technology and Next Steps
Anson is advancing lithium recovery through Direct Lithium Extraction (DLE) technology, which promises a more sustainable and efficient alternative to traditional evaporation ponds. The company has already established a demonstration pilot plant adjacent to the Bosydaba #1 well and is collaborating with technology partners to optimize lithium recovery processes.
Future work includes flow and pump testing to better understand the aquifer’s hydrological properties, monitoring aquifer drawdown, and further sampling to resolve discrepancies in lithium concentration assays observed between 2024 and 2025. The conservative resource estimate currently uses the more established 2024 assay data, while the higher 2025 lithium concentrations await confirmation.
Strategic Location and Land Tenure
The Green River Project spans over 77 square kilometers, comprising a mix of private lands, Bureau of Land Management (BLM) claims, and state leases, all secured under Anson’s 100% owned subsidiary. The project’s location on the Colorado Plateau within the Paradox Basin offers geological conditions conducive to lithium-brine deposits, including an arid climate, closed basin structures, and tectonic subsidence.
While some BLM claims overlap with Department of Defense restricted areas, Anson has navigated permitting challenges effectively to maintain exploration momentum.
Bottom Line?
With a solid maiden resource and promising expansion avenues, Anson’s Green River Project is poised to become a key player in lithium supply; pending confirmation of higher lithium grades and successful scaling of extraction technology.
Questions in the middle?
- Will lithium assay results from the Mt Fuel-Skyline Geyser well confirm higher grades and expand the resource?
- How will the evolving Direct Lithium Extraction technology perform at commercial scale in this unique aquifer setting?
- What are the environmental and regulatory hurdles ahead as Anson advances towards feasibility and production?
