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矿床地质  2005 

滇西腾冲大硐厂铜-铅-锌矿床的辉钼矿Re-Os同位素定年

Keywords: 地球化学,Re-Os同位素定年,块状硫化物,叠加成矿,大硐厂铜-铅-锌矿床,云南腾冲

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Abstract:

在环绕印度—亚洲大陆碰撞形成的东构造结波密—腾冲弧形构造带中,发育一组含锡铅_锌_铜多金属矿床,但一直没有准确的成矿年龄数据。文章通过对大硐厂铅_锌矿区红沟岩铜矿体中辉钼矿的Re_Os同位素测试,获得精确的成矿等时线年龄为(118.0±2.4)Ma。区内与成矿关系密切的斑岩成岩年龄在143~112Ma,认为斑岩成岩与成矿同期,同为燕山晚期。

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