Portal de Periódicos da CAPES

ALTERAÇÃO HIDROTERMAL PERALUMINOSA NA SEQUÊNCIA VULCANO-SEDIMENTAR PALEOPROTEROZÓICA DE SILVÂNIA, REGIÃO DE VIANÓPOLIS, GOIÁS

2002; Sociedade Brasileira de Geologia; Volume: 32; Issue: 2 Linguagem: Inglês

10.5327/rbg.v32i2.984

2317-4889

Raul Minas Kuyumjian, Mônica Elizetti de Freitas,

Geography and Environmental Studies

The small aluminossilicate deposit of Vianopolis, southeastern part of the state of Goias, is hosted by the paleoproterozoic island-arc-type Silvânia volcanic-sedimentary sequence and associated intrusions of granite and granodiorite. Pyrophyllite, kyanite, white mica, diaspore, tourmaline and chlorite are the products of the peraluminous hydrothermal alteration, inside a N50 o -60 o W trending shear zone. The presence of gold, pyrrotite and chalcopyrite in rocks from the alteration zone indicates potencial resources also for metallic mineral deposit in the Silvânia sequence.