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Sigma Lithium suspends mining at Grota do Cirilo after court delays ruling on environmental injunction
SGMLSigma Lithium Corp
Sigma Lithium Corporation temporarily suspended all mining and industrial production at its Grota do Cirilo complex on September 30, 2026, following a 15-day delay by the Federal Court of Appeals in reviewing its legal defense against an environmental injunction. The company maintains its full-year 2027 guidance of 330,000 tonnes of lithium oxide concentrate but has postponed its 12-month production target of 240,000 tonnes by three months due to the suspension. Commercial and recycling operations continue to generate cash flow while the legal dispute proceeds. This operational halt poses significant near-term risk to revenue and regional economic impact in Minas Gerais, Brazil. Sigma Lithium operates as a producer of industrial-mineral lithium oxide concentrate for battery materials.