东喀喇沁金矿的同位素地球化学

J4 ›› 1995, Vol. 3 ›› Issue (3): 26-32.

东喀喇沁金矿的同位素地球化学

郑学正,张魁武,关鸿,李秀云,李达周

中国科学院地质研究所北京 100029

出版日期:1995-06-28 发布日期:2011-11-08

Online:1995-06-28 Published:2011-11-08

摘要/Abstract

摘要：

喀喇沁金矿区位于内蒙古,属华北地台北缘的北矿带区。区内中生代花岗岩类的微量元素和银、氧同位素地球化学表明,其源区具有重熔岩浆和深源物质混合的壳幔混合型及同位素未均一化的特征。偏碱性钾质花岗岩—石英二长岩类及其与太古宙绿岩接触带附近的高密度金矿化,显示了这类重熔岩浆对金的迁移—再富集作用。区内金矿石的铅、氢、氧、碳、硫等稳定同位素地球化学也反映了成矿交代热流体物源的多源性及壳源—幔源混合特点。研究表明本区金矿具有晚太古宙下部绿岩矿源—中生代偏碱性钾质花岗岩、石英二长岩的预富集—成矿流体多源混合的成因机制和成矿模式。

郑学正,张魁武,关鸿,李秀云,李达周. 东喀喇沁金矿的同位素地球化学[J]. J4, 1995, 3(3): 26-32.

参考文献

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