Geology

Most of the concessions, which lie within the Brazilian Shield, have been staked over Archaen to Lower Proterozoic greenstone belts as reported in the N.I. 43-101 Technical Report, which are considered to be prospective for gold. Small-scale garimpeiros (artisanal miners) are active in and around all of the concession areas. Gold production by garimpeiros in northern Mato Grosso from the end of the 1970s to 2000 is reported by the National Department of Mineral Production to have totalled 123t.