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Our Project

Mr. Wes Roberts, P.Eng., an independent member of the technical committee of the Company, is the “qualified person” under NI 43-101 who reviewed and approved the technical information included on the website


Sigma’s properties are located in Brazil’s Minas Gerais State, a mining-friendly state, in the municipalities of Araçuaí and Itinga. They are approximately 450km northeast of the state capital, Belo Horizonte. The company holds 27 mineral rights in four properties spread over 191km2, or over 19,000 hectares, which include nine past-producing lithium mines.

Sigma’s focus is on the 100%-owned Grota do Cirilo property, the largest lithium hardrock deposit in the Americas, where the company has been producing environmentally sustainable battery-grade lithium concentrate on a pilot scale since 2018. A larger-scale commercial operation is planned with capacity for 220,000 tonnes (33,000 tonnes of LCE) annually in Phase I, rising to 440,000 tonnes (65,000 tonnes of LCE) in Phase II.

Grota do Cirilo is adjacent to a major river, the Jequitinhonha River, which supplies its water needs. The property is also 50km away from the Irapé hydropower plant, which supplies its electricity. The project has access to major roads and ports, where its product can be shipped from to markets in Asia, Europe and North America.