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地球学报  2010 

安徽铜陵天马山金硫矿床地质地球化学特征

DOI: 10.3975/cagsb.2010.02.09

Keywords: 金硫矿床,二元结构,地质地球化学,安徽天马山

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Abstract:

安徽铜陵天马山金硫矿床发育上部层状矿体和下部网脉状矿体,地球化学特征呈现出明显的垂向变化和二元结构性。从下部网脉状矿化岩石到上部层状矿石,Pb、Zn、Au、Ag、As、Hg等含量和δ18O值总体逐渐增高,Cu、Mo、Cr、Co、Ni、REE等含量和成矿温度499℃→65℃及δ34S值总体呈逐渐降低趋势。黄铁矿的δ34S值为+4.0‰~+9.6‰,上部层状块状矿石中方解石和石英的δ18O平均值为+13.7‰,下部网脉状矿化岩矿石中脉石英或全岩δ18O平均值为+12.3‰。地质地球化学特征反映天马山金硫矿床为海底热水喷流沉积成因。

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