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矿床地质  2006 

西藏搭格架热泉型铯矿床地质特征及形成时代

Keywords: 地质学,热泉型铯矿床,U系法测年,硅华,搭格架,西藏

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Abstract:

文章在野外第四纪地质与地貌调查的基础上,系统研究了搭格架矿床的地质特征,并以U系法的全溶法和等时线法为主要手段,查明了矿床的成矿时代。根据泉华在野外的分布特征,将其分为6套。第Ⅰ套为灰白色钙华;第Ⅱ~Ⅵ套为硅华,主要矿物为胶状和粒状蛋白石。硅华在长马曲河流阶地的位置分别为:第Ⅱ套,T5;第Ⅲ套,T4;第Ⅳ套,T3;第Ⅴ套,T2;第Ⅵ套,T2。泉华形成于5个阶段:403~202kaB.P.;99kaB.P.;39~25kaB.P.;17~4kaB.P.;现代。

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