| 东秦岭松树沟蛇绿岩Sm-Nd同位素年龄的地质意义 |
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| 引用本文： | 董云鹏, 周鼎武, 刘良, 张旗, 张宗清. 1997. 东秦岭松树沟蛇绿岩Sm-Nd同位素年龄的地质意义. 地质通报, 16(2). |
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| 作者姓名： | 董云鹏 周鼎武 刘良 张旗 张宗清 |
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| 作者单位： | 1. 西北大学地质系;; 2. 中国科学院地质研究所;; 3. 中国地质科学院地质研究所 |
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| 摘 要： | 东秦岭松树沟蛇绿岩主要由变质橄榄岩和变质玄武岩组成。变玄武岩全岩Ｓｍ Ｎｄ同位素等时年龄为（１０３０±４６（２δ））Ｍａ，ＩＮｄ＝０．５１１６１±５（２δ），εＮｄ（ｔ）＝＋５．７±０．２，代表蛇绿岩中玄武岩的形成年龄。这一年龄的确定，为探讨秦岭区中晚元古代的古构造格局提供了重要的证据
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| 关 键 词： | 蛇绿岩 Sm-Nd等时线 松树沟 东秦岭 |
Sm Nd ISOTOPIC AGES OF THE SONGSHUGOU OPHIOLITE FROM THE EAST QINLING AND ITS GEOLOGICAL SIGNIFICANCE |
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| 1997. Sm Nd ISOTOPIC AGES OF THE SONGSHUGOU OPHIOLITE FROM THE EAST QINLING AND ITS GEOLOGICAL SIGNIFICANCE. Geological Bulletin of China, 16(2). |
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| Authors: | Dong Yunpeng Zhou Dingwu Liu Liang |
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| Affiliation: | 1. Department of Geology, Northwest Univeristy, Xi’an, Shaanxi;; 2. Institute of Geology,Academia Sinica,Beijing;; 3. Institute of Geology,MGMR,Beijing |
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| Abstract: | The Songshugou ophiolite consists mainly of meta perdotite and meta basalt. Five whole rock samples of meta basalt give a Sm Nd isochron age of （1030±46 ） Ma with I Nd =0.51161±5 （2δ） and ε Nd （t） = +5.7±0.2, which may represent the formation age of the basalt. This age gives some important information about the Middle Late Proterozoic tectonic framework in the Qinling region. |
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| Keywords: | ophiolite Sm Nd isochron Songshugou East Qinling |
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