Lithium is primarily sourced from two main types of geological deposits: brines (salt lakes) and hard rock (pegmatite) mines. Minor amounts are also sourced from clays and through the recycling of spent lithium-ion batteries. 

Primary Sources of Lithium

• Brine Deposits: These are underground reservoirs of lithium-rich salty water, predominantly found in the “Lithium Triangle” of South America (Argentina, Bolivia, and Chile).
  
  • Extraction Method: Brine is pumped into large solar evaporation ponds, where the water evaporates over several months, concentrating the lithium salts. The concentrated brine is then processed to produce lithium carbonate (Li₂CO₃). This method is cost-effective due to its reliance on solar energy but is water-intensive and geographically limited by climate conditions.
• Hard Rock (Pegmatite) Mining: Lithium is found in various minerals within hard rock deposits, with spodumene being the most commercially important. Major deposits are located in Australia, Canada, China, and Brazil.
  
  • Extraction Method: Traditional mining techniques are used to extract the ore, which is then crushed and processed in a chemical refining facility. The resulting spodumene concentrate is treated with heat and acid to produce lithium sulfate, which is then converted into high-purity lithium compounds like lithium carbonate or lithium hydroxide (LiOH). 
  • Secondary and Emerging Sources
    • Clays and Sedimentary Deposits: Lithium-bearing clays, such as hectorite and jadarite, are being actively explored for future mining potential, particularly in the United States, Mexico, and Serbia.
    • Geothermal and Oilfield Brines: Direct lithium extraction (DLE) technologies are being developed to recover lithium from these industrial waste streams. DLE methods can be faster and have a smaller environmental footprint than traditional evaporation ponds, allowing for extraction from lower-concentration sources.
    • Recycling: The recycling of end-of-life lithium-ion batteries is a growing source of lithium, reducing the reliance on virgin materials and minimizing environmental impact. 
     
    Global Production Leaders
    As of 2024, the leading countries for lithium production are:
    • Australia (largest producer from hard rock mines)
    • Chile (largest producer from brines)
    • China (significant producer from both brines and minerals, and the dominant player in refining capacity) 
    For more information on the market and production data, consult industry intelligence providers such as Benchmark Minerals or the U.S. Geological Survey (USGS) reports.