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矿床地质  2002 

陕西金龙山卡林型金矿带成矿流体地球化学研究

Keywords: 成矿流体,金龙山金矿带,卡林型金矿,同位素,包裹体

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Abstract:

陕西金龙山金矿的流体包裹体研究表明,成矿流体属于Na+-Cl-型;从成矿早期到晚期,流体的氧化性逐渐增强,成矿深度逐渐变浅,大气降水混入增多,有机组分增多。石英包裹体的Na+、K+、SO2-4、Cl-以及阴、阳离子总量都高于同期共生的方解石,而Mg2+和F-则相反;含铁方解石的δ13C、δ18O和包裹体δD均低于方解石和石英。用配位化学理论将这些差异解释为同一流体系统水岩作用的结果。氢、氧、碳同位素指示了流体主要来自建造水和大气降水;流体中的碳主要来自围岩地层。

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