A Remarkable Lithium Discovery Beneath a U.S. Supervolcano Could Transform Energy Resources
Deep within the high desert plateau that straddles the borders of Oregon and Nevada, an ancient volcanic crater is becoming a pivotal point in a national discussion about resources. Hidden beneath the surface of the McDermitt Caldera is what experts believe could be one of North America’s largest lithium reserves, potentially containing between 20 to 40 million metric tons of this crucial mineral.
But what makes this discovery particularly significant is not just its vast size; it arrives at a critical moment for the United States as it seeks to lessen its reliance on foreign minerals necessary for the production of electric vehicle batteries, placing lithium squarely at the forefront of this mission.
The proposal for extracting lithium from this site has ignited a clash of interests. The Department of Energy has classified lithium as a vital mineral, yet there are strong warnings from Indigenous groups and conservationists about the potential damage to both natural ecosystems and cultural sites if extraction is rushed.
Plans for Extensive Drilling in a Protected Environment Unveiled
In 2025, HiTech Minerals Inc., a branch of Jindalee Resources, submitted a detailed Exploration Plan of Operations to the Bureau of Land Management (BLM) for its McDermitt Lithium Project located in Malheur County, Oregon. The documents reveal intentions to establish hundreds of test wells and build roads across a section of public land situated within the caldera.
This area is home to sagebrush steppe habitats that provide refuge for the greater sage-grouse, a species already facing significant threats to its survival. Environmental advocates, including the Oregon chapter of the Sierra Club, have formally expressed their concerns regarding the limited public comment period and the potential adverse effects on sensitive habitats and water systems.
"This geological feature is 16 million years old, yet we are making decisions affecting it in just a few years," remarked Sammy Castonguay, a geologist who has extensively researched the volcanic history of the region. This stark contrast between the slow passage of geological time and the urgency of development is fueling demands for a more thorough environmental assessment.
HiTech asserts that it is conducting environmental and cultural evaluations and plans to restore areas disturbed during drilling operations. The company highlights its commitment to community engagement, including financial support for local educational initiatives and job training programs. Some local leaders have embraced this investment warmly.
"We need to approach this the Oregon way – ensuring full accountability and shared benefits," commented Greg Smith, the county’s economic development director.
The Supervolcano's Hidden Legacy: A Source of Energy Potential
Formed by a supervolcanic eruption 16 million years ago, the caldera resulted in a closed basin devoid of a natural outlet. Over time, geothermal fluids rich in lithium concentrated in fine-grained sediments, particularly in illite-bearing claystones.
Research published in the journal Minerals has revealed exceptionally high lithium levels in these clay-rich formations. This type of lithium deposit differs significantly from the brine evaporation ponds typically found in South America or the hard rock sources prevalent in Australia.
Extracting lithium from claystone deposits like those in McDermitt necessitates acid leaching techniques, a chemical-intensive process that can pose operational challenges and environmental hazards. This method requires more energy and water compared to other extraction processes and can produce substantial amounts of waste materials.
Currently, there are no commercial-scale claystone lithium mines operating in the U.S., and the economic viability of large-scale mining at McDermitt is still unproven.
Fast-Tracking National Security Projects
The McDermitt Lithium Project has been designated under the FAST-41 permitting process, a federal initiative aimed at expediting infrastructure projects deemed strategically important. Although this designation doesn’t circumvent environmental regulations, it does facilitate interagency cooperation and may shorten the timelines related to exploratory approvals.
Furthermore, the Department of Defense has identified lithium as critical to national security, noting its importance in energy storage systems, military munitions, and the electrification of vehicles. The Department's battery strategy document stresses the necessity for secure domestic supply chains.
Proponents contend that developing domestic sources of lithium could safeguard U.S. industries against international supply chain disruptions. As it stands, the majority of lithium used for American battery production is imported, primarily from countries like Chile, Australia, and China.
However, many pressing questions remain unanswered. The Bureau of Land Management has yet to publish a final environmental impact statement regarding full-scale mining operations. Tribal governments, with deep ancestral connections to the land, have raised alarms about sacred sites and access to culturally significant areas, yet no formal resolutions or consultations have been disclosed.
Challenges Surrounding Extraction Methods, Water Usage, and Timelines
While lithium prices have shown volatility into late 2025, interest from investors in the McDermitt reserve remains robust. Nonetheless, initiating large-scale extraction will require extensive water sourcing, robust chemical processing facilities, and careful long-term reclamation planning.
Ongoing research seeks to develop less intrusive lithium processing technologies, but none have yet been successfully implemented on a large scale for claystone deposits. Experts highlight that the efficiency of recovery methods and effective waste management will play vital roles in determining whether the project advances beyond its exploratory phase.
The forthcoming phases of drilling, consultation, and permitting are set to continue throughout 2026 under the supervision of the Bureau of Land Management.
