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地质通报  2007 

藏北羌塘地块中部蓝片岩中捕获锆石SHRIMPU-Pb定年及其意义

, PP. 98-702

Keywords: 钻石SHRIMPU―Pb年龄蓝片岩羌塘地块中部西藏

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Abstract:

羌塘中部2个蓝片岩样品中锆石SHRIMPU―Pb定年结果表明,锆石属于残留锆石,不是蓝片岩相变质作用形成的新生锆石,这些年龄代表源区原岩的年龄或原岩捕获锆石的年龄,是不同构造一热事件的响应。首次在藏北羌塘地区获得了锆石SHRIMPU―Pb年龄2533Ma,说明这颗锆石来自新太古代,虽然不一定源自本地,但至少暗示羌塘地区新太古代曾经可能发生过构造一热事件。

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