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矿床地质  2003 

小秦岭—熊耳山地区金矿的成矿流体特征

Keywords: 地球化学,地幔流体,稳定同位素,流体运移方向,印支期成矿,小秦岭—熊耳山

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Abstract:

文章系统地总结分析了小秦岭—熊耳山地区金矿的成矿流体特征和成矿作用及矿床的S、Pb、O、C等稳定同位素特征,提出金矿床的成矿流体为地幔流体。流体的运移方向则是自南向北,由下向上,并非来自矿床北部的燕山期文峪花岗岩。新的测年结果表明,不少矿床的成矿时代为印支期,燕山期是迭加在印支期之上的成矿期。它们构成了中国东部中生代成矿作用的完整旋回。成矿受印支期构造作用的制约,是在远离商丹主缝合带的拉张环境下形成的。

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