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地球学报  2006 

安徽冬瓜山铜矿床的地球化学特征

DOI: 10.3975/cagsb.2006.06.05

Keywords: 铜矿床,二元结构,地球化学,安徽冬瓜山

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Abstract:

冬瓜山铜矿床发育上部层状矿体和下部浸染状—脉状矿体,地球化学特征呈现出明显的垂向变化和二元结构性。从下部浸染状—脉状矿化岩石到上部层状块状矿石,CaO、MgO、Fe2O3、FeO、Cu、Au、Zn、Ag、As等含量和δ18O、δ12C值总体逐渐增高,SiO2、Al2O3、TiO2、K2O、Na2O、Pb、Hg、Sb、Mo、REE等含量和流体包裹体温度379·3℃→135·0℃及δ34S值总体逐渐降低。硬石膏δ34S值为14·8‰~20·5‰,黄铁矿δ34S值为2·7‰~7·9‰,含矿硅质岩δ18O为12·0‰,含铜矿石中菱铁矿δ18O平均值为13·97‰。地质地球化学特征反映冬瓜山铜矿床为海底热水喷流沉积成因。

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