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地质论评  2006 

四川会理大岩子铂钯矿的地质地球化学特征及找矿前景浅析

Keywords: 铂族元素热液成矿大岩子找矿前景四川

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Abstract:

四川会理县大岩子铂钯矿床是目前国内品位最高的独立铂族元素矿床之一,也是一个独特的热液成因矿床。矿区及区域上的镁铁质岩浆岩可能是铂族元素的初始来源,震旦系白云岩是其有利的容矿围岩,构造控制下的热液活动促使了铂族元素的迁移富集。地表氧化带蓝铜矿化白云岩矿石的PGE含量最高可达27.13×10-6,坑道中相对新鲜橄辉岩的PGE含量为1.068×10-6,强烈蚀变橄辉岩含PGE0.528×10-6,地表蚀变后橄辉岩的PGE含量为0.435×10-6,表明铂族元素可能发生了活化转移。整个攀西地区基性超基性岩发育,后期构造活动强烈,有利的围岩广泛分布,因而具备形成热液型铂族元素矿床的条件,找矿前景看好。

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