云南革档金矿地质地球化学特征及成矿模式

THE CHARACTERS OF GEOLOGY AND GEOCHEMISTRY AND THE METALLOGENIC MODEL OF GEDANG GOLD DEPOSIT, YUNNAN PROVINCE

Gedang gold deposit is not only one of the typical micrograin-disseminated gold deposit in Yunnan-GuizhouGuangxi gold metallogenic province, Southwest China but also the first one that contains relative abundance of PGE in this type of gold deposit.Based on the research of regional geology and the characters of geology and geochemistry of Gedang gold deposit, the authors, by using the geochemistry and physicochemieal methods of trace element, rare earth element, stable isotope and fluid inclusions, have discovered that the main ore-forming materials come from the sedimentary rocks, part of the ore-forming materials come from the Mesozoic basic intrusives, and during the metallization there was Mesozoic meteoric water incooperatod into the ore-forming fluid. The authors have also concluded that it is a epithermal mierograin-disseminated gold deposit.