Massive Fe-Cu-Au polymetallic deposits metallogenesis in Carajás mineral province of BrazilChinese Full Text
ZENG Yong;GUO WeiMin;XIANG HongLi;YAO ChunYan;DONG YongGuan;China University of Geosciences;Nanjing Center of China Geological Survey;
Abstract: The Carajás province of Brazil is one of the world famous metallogenic regions with various types of deposits and high concentration of minerals. It is well known for huge shallow enrichment type Fe-Mn deposits. In recent years the world’s largest iron oxide Cu-Au deposits and some distinctive small vein type Cu-Au（ W-Sn） deposits,epithermal Au-Pd-Pt deposits, sedimentary Mn deposits and Ni-Cr deposits related to ultrabasic rocks were discovered in this province. A comprehensive study shows that four periods of metallogenesis occurred in this region,namely early Neo-Archaeozoic Fe-Mn metallogenesis, late Neo-Archaeozoic Cu-Au-U-REE metallogenesis, late Paleoproterozoic Cu-Au（ W-Sn） metallogenesis, and late Neoproterozoic Au-Cu metallogenesis. The Cenozoic supergenesis,especially laterized desilication enrichment, transformed Carajás into a large Cu-Au mineral province.
- DOI：
10.16111/j.0258-7106.2015.04.012
- Series：
- Subject：
- Classification Code：
P618.2
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