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地球学报  2003 

四川牦牛坪稀土矿床地幔流体成矿的碳、氢、氧、硫同位素证据

Keywords: 稀土矿床,四川牦牛坪,地幔流体,C、H、O、S同位素

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Abstract:

选取2种主要矿石类型——碳酸岩伟晶岩型矿石和重晶石伟晶岩型矿石进行了成矿流体的C、H、O、S同位素测试,获得δ^13CV-PDB值为-3.0‰~-5.6‰,δDV-SMOW值为-57‰~-88‰,δ^18OH2O-VSMOW值为8.0‰~13.3‰,δ^34SV-CDT值为3.3‰~5.9‰,以及方解石的δ^13CV-PDB值为-6.9‰和δ^18OV-SMOW值为7.3‰~7.4‰。所有这些数据表明,四川牦牛坪稀土矿床在成矿过程中有大量地幔物质参与。

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