Produção Nacional
Geologia e ocorrências de ouro do Terreno Granito-Greenstone do Tocantins, TO: síntese do conhecimento e parâmetros para exploração mineral
2012; Sociedade Brasileira de Geologia; Volume: 42; Issue: 1 Linguagem: Inglês
10.25249/0375-7536.2012421213228
ISSN2177-4382
AutoresRaul Minas Kuyumjian, Emílio Lenine Carvalho Catunda Da Cruz, José Oswaldo de Araújo Filho, Márcia Abrahão Moura, Edi Mendes Guimarães, Karla Munique da Silva Pereira,
Tópico(s)Mining Techniques and Economics
ResumoThe Paleoproterozoic Tocantins Granite-Greenstone Terrane is composed of granite-gneissic domes and narrow intervening greenstone belts. Tholeiitic metabasalts and calc-alkaline metatonalites have chemical composition characteristic of subduction tectonic environment. The main gold concentrations occur in iron-rich amphibolite, banded iron formation and granitic rocks. It is suggested that the Tocantins Granite-Greenstone Terrane gold occurrences and deposits were formed by dominantly metamorphic hydrothermal fluids during the Brasiliano Orogeny, with granitic contribution. Guide lines for mineral exploration programs for gold in the Tocantins Granite-Greenstone Terrane are presented.
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