Abstract
Recent development of lithium ion batteries for vehicles industries have led to a boom in lithium exploration and development for the new generation of batteries. One of the cheapest sources of lithium is the brines hosted in the aquifers of the arid intermontane-closed salar basins. Because the resource is a fluid, with the attendant problems of in-aquifer mixing, reorganization, and lower recovery factors compared with most metalliferous and industrial mineral deposits due to reliance on pumping of the brine from wells for extraction, existing codes for filing resource and reserve estimates require new approach for these prospects. Evaluation of brine resources is complex and requires participation of a variety of qualified experts such as hydrogeologists, geologists, geochemists and chemical engineers. The technical reports disclosing the results of these estimates should reflect the inputs of multi-disciplinary approaches. The requirements for brine resource and reserve evaluation, drawing on several examples from the experiences in the Central Andes are reviewed in this paper.