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地球学报  2006 

西藏泽当蛇绿岩的Sm-Nd等时线年龄及其意义

DOI: 10.3975/cagsb.2006.01.04

Keywords: 蛇绿岩,SM-ND等时线年龄,泽当,西藏

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Abstract:

泽当蛇绿岩位于雅鲁藏布江蛇绿岩带东段,对蛇绿岩中的玄武岩进行了全岩SM-ND同位素分析,得到的等时线年龄为175±20MA,初始ΕND(t)=7.2,表明泽当蛇绿岩形成于中侏罗世,来源于强烈亏损的地幔源区,没有受到大陆地壳物质的混染。

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