- Lithium deposits identified in Appalachia could provide hundreds of years of imports
- Domestic Discoveries in Multiple States Point to Expansion of Lithium Exploration Efforts
- Extractive capacity remains biggest challenge despite significant confirmed resource estimates
Lithium buried beneath parts of the Appalachian region could provide the United States with hundreds of years of materials critical to batteries, electronics and large-scale energy storage systems.
New estimates from the United States Geological Survey indicate approximately 2.3 million tons of lithium oxide are located in pegmatite formations distributed across parts of the eastern United States.
Much of the material is believed to lie beneath parts of the Carolinas, while other deposits are believed to lie beneath parts of western Maine and New Hampshire.
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Appalachian lithium resources concentrated in pegmatites
Report on current affairs, Fortune According to the United States, the scale is large enough to replace about 328 years of U.S. lithium imports, based on recent demand levels, a figure that shows how dependent the country has become on foreign sources for key battery materials.
The deposits could support the production of around 500 billion cell phones, as well as billions of laptops and tablets, or enough batteries to power around 130 million electric vehicles if the materials can be recovered on a commercial scale.
Much of the debate around lithium now focuses on supply chains, especially as China dominates the production of finished lithium-ion batteries used in devices ranging from smartphones to electric vehicles and data center backup systems.
Demand continues to rise as manufacturers transition away from older battery types, while lithium-ion technology remains widely used in systems requiring fast charging and long life.
The USGS says Appalachia’s lithium resources are concentrated in pegmatites, large-grained, granite-like rock formations that can trap valuable elements as they cool and crystallize at depth.
Access to the material remains the biggest obstacle, as the United States currently produces only a small share of global lithium production despite rising domestic demand.
The country recently produced around 610 tonnes of lithium, representing around 0.3% of global production, while most large-scale refining and battery manufacturing continues to take place overseas.
In December 2025, we reported how researchers identified lithium-rich clay deposits inside the McDermitt Caldera along the Nevada-Oregon border, where geological studies suggested there may be between 20 and 40 million tons of lithium-containing material.
Geological analysis has shown that layers of volcanic ash and long-lasting hydrothermal activity have enriched the soft sediments with lithium, creating bands of clay that, in some cases, are close enough to the surface to allow strip mining.
Industry planners continue to emphasize that discovery alone does not guarantee production, since refining capacity, environmental permits and infrastructure determine how quickly resources reach the market.
Government-backed financing and private investment projects are already underway in places like Arkansas, where chemical extraction methods are being tested to increase domestic production capacity.
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