| 新疆阿拉套山花岗岩类高εNd值的成因探讨 |
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| 引用本文： | 周泰禧 陈江峰. 新疆阿拉套山花岗岩类高εNd值的成因探讨[J]. 地质科学, 1996, 31(1): 71-79 |
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| 作者姓名： | 周泰禧 陈江峰 |
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| 作者单位： | 1. 中国科学技术大学地球和空间科学系 合肥 230026;2. 第三世界科学院中国科学技术大学地球科学和天文学高级研究中心 合肥 230026 |
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| 摘 要： | 新疆阿拉套山广泛出露的华力西期花岗岩类的一般岩石学和地球化学性质可与我国以及世界上大部分地区出露的花岗岩相类比,但其εNd(t)高,为+2.2-+3.2,其中一部分花岗岩的87Sr/86Sr(t)也高,可达0.715.这可能是壳幔物质AFC式混合的结果,也可能是准噶尔地块及其两缘特殊地质环境的反映。
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| 关 键 词： | Nd同位素初始比值 花岗岩 新疆阿拉套山 |
| 收稿时间： | 1994-01-29 |
| 修稿时间： | 1994-01-29; |
ORIGIN OF HIGH εNd(t) GRANITES FROM ALATAO MOUNTAIN, XINJIANG |
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| Zhou Taixi, Chen Jiangfeng, Li Xueming. ORIGIN OF HIGH εNd(t) GRANITES FROM ALATAO MOUNTAIN, XINJIANG[J]. Chinese Journal of Geology, 1996, 31(1): 71-79 |
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| Authors: | Zhou Taixi Chen Jiangfeng Li Xueming |
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| Affiliation: | 1. Department of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026;2. Advanced Centre for Earth Sciences and and Astronomy, University of Science and Technology of China,Third World Academy of Sciences, Hefei 230026 |
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| Abstract: | Variscan granitic intrusions are widely outcropped in Alatao Mountain,Northwest Xinjiang.Petrologic and many geochemical characteristics of these granites are very similar to those of most granites of the world.But εNd(t) values of these granites are high, ranging from + 2.2 to + 3.2, meanwhile εSr(t) of some of these granites are also high, up to 150.Granitoids with both high εNd(t) and εSr(t) are rare in the world.As most hight Nd(t), hight εSr(t) granitoids, granites of the Alatao Mountain are formed by AFC processes and in a special (extensional and /Or postorogenic) geological setting. |
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| Keywords: | nitial Nd isotope ratio Granite Alatao Mountain Xinjiang |
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