Geology and mineral resources of the Monlevade and Rio Piracicaba quadrangles, Minas Gerais, Brazil
1966; United States Government Publishing Office; Linguagem: Inglês
10.3133/pp341e
ISSN2330-7102
Autores Tópico(s)Geological formations and processes
ResumoOther mineral resources within the quadrangles are the Agua Limpa manganese deposit and several other small and presently uneconomic manganese deposits; the Pe de Serra and Talho Aberto pegmatite deposits, the latter famous for its phenacite (now apparently exhausted) ; gold placer deposits (now mostly exhausted) along the Rios Santa Barbara and Piracicaba, and their principal tributaries; granitic rock used for building stone and paving blocks; clay for bricks and tiles; and sand and gravel along the main rivers and their principal tributaries.The manganese deposits are associated with the Caue Itabirite, locally manganiferous in its upper part, and with the manganiferous clastic sediments and itabirite of the Elefante Formation.The deposits are supergene concentrations of manganese oxides, derived from the weathering of manganiferous itabirite or the almandine
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