贵州戈塘金矿床地质特征及成因研究

戈塘金矿位于黔西南金成矿区。矿床赋存在茅口组与龙潭组间的不整合面上,受层间滑脱构造控制。含矿层为一套角砾岩,呈层状、似层状产出,发育硅化、黄铁矿化、辉锑矿化、萤石化、雄黄化等围岩蚀变。硫同位素和氢氧同位素研究表明,热液中硫具有深部来源的特点,成矿流体中水属于岩浆水与大气降水的混合,成矿温度、流体盐度和密度较低,属于中低温热液矿床。

Geological Characteristics and Origin of Getang Gold Deposits in Guizhou

Getang ore is located southwestern Guizhou province where there are a lot of gold deposits. It originates in unconformable surface between Maocou Group and Longtan Group, was controlled by decollement structure. The Ore-bearing layer is a set of altered breccia. The main alterations include silication, pyritization, stibnite change, hotaru petrochemical and realgar change. Hydrogen and oxygen isotope and sulphur isotope show that sulphur of mineralized hydrothermal is mainly from deep source, and the water of metaUogenic fluid is a mixture of magmatic water and rainfall. Moreover, fluid salinity and density are low, so it belongs to medium-low temperature deposit.