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Carbon and oxygen isotopic compositions of Chaishan Pb-Zn deposit in the Shizhuyuan ore field and implications
Author(s): 
Pages: 242-250
Year: Issue:  3
Journal: Geochimica

Keyword:  C同位素O同位素成矿流体水-岩反应模式柴山矿床柿竹园矿田;
Abstract: 研究了柿竹园矿田柴山铅锌矿床早、晚期方解石的C、O同位素组成,并对C、O同位素组成之间明显的正相关关系进行了CO2去气、流体混合与水-岩反应的理论模拟.结果表明,该矿床方解石的形成主要是由成矿流体与围岩发生水-岩反应及温度降低造成的,另外大气降水的加入也起剑一定的作用.成矿流体中的可溶性碳以H2CO3为主,早期成矿流体的δ13c、δ18O值分别为-2.5‰和+4‰,晚期成矿流体的δ13C、δ18O值分别为-1‰和+6‰,并且在成矿过程中一直有中生代大气降水的加入.
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