Potencialidade mineral da porção media do Vale do Ribeira (SP) para mineralizações auriferas, obtida de um sistema de informação geografica - SIG
AUTOR(ES)
Paulo Armando de Moura
DATA DE PUBLICAÇÃO
1997
RESUMO
The Ribeira Valley is known as one of the main areas which produces lead in Brazil and its deposits and occurences are located in metamorphic carbonatic zones. For a long time gold was known to occur in the vaUey but only at the begining of the 70s geochemical works were carried out and Cu,Pb,Zn anomalies were found associated to gold and sulfides. There are many academic studies and mineral exploration projects in the area but the integration of geochemical, geophysical and geological data with the help of a Geographic Information System provides a methodology that should help in a decision making. The decision model used in this work is litho-structutal. The decision model is made up !Tom several maps (geological, geochemical, geophysical and structural). From the gamaspectrometry dataset K, Th and U were used and the images were reclassified into four categories. The structural map was obtained using the buffer zones along shear zones. The geochemical map is a result of anomalous sub-basins. The geological map represents the favourable lithologies of Perau formation and the phyllites of Iporanga formation, to host gold mineralization. Each map was weighted by its importance in the determination of submodels. The combination of these submodels represents the mineral potential of the area
ASSUNTO(S)
jazidas minas e recursos minerais - ribeira de iguape rio bacia (pr e sp) processamento de imagens - tecnicas digitais
ACESSO AO ARTIGO
http://libdigi.unicamp.br/document/?code=vtls000115801Documentos Relacionados
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