| 西藏泽当蛇绿岩的Sm-Nd等时线年龄及其意义 |
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| 引用本文：韦栋梁,夏斌,周国庆,王冉,钟立峰,万哨凯.2006.西藏泽当蛇绿岩的Sm-Nd等时线年龄及其意义[J].地球学报,27(1):31-34. |
| DOI：10.3975/cagsb.2006.01.04 |
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| 基金项目:中国科学院知识创新工程项目(编号:KZCXZ-SW-117); 国家自然科学基金项目(编号:40072022) |
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| 中文摘要: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。 |
| 中文关键词:蛇绿岩 SM-ND等时线年龄 泽当 西藏 |
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| Sm-Nd Isochron Age of Zedang Ophiolite in Tibet and Its Significance |
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| Abstract:Zedang ophiolite is located in the eastern segment of Yalung Zangbo ophiolite belt, Tibet. The whole rock Sm-Nd isochron age of basalts in Zedang ophiolite is 175±20 Ma, indicating that the ophiolite was formed in the Middle Jurassic. The initial ε_ Nd (t) value of basalt is +7.2, suggesting that the Zedang ophiolite was derived from a strongly depleted mantle and did not suffer from crustal contamination. |
| keywords:ophiolite Sm-Nd isochron age Zedang Tibet |
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