| 熊耳山下元古界片麻岩岩石地球化学及成因 |
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| 引用本文： | 廖庆园,邓红卫,严新泺,廖家飞,王毅泽.熊耳山下元古界片麻岩岩石地球化学及成因[J].云南地质,2012(2):263-266. |
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| 作者姓名： | 廖庆园 邓红卫 严新泺 廖家飞 王毅泽 |
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| 作者单位： | 桂林理工大学地球科学学院;中国科学院广州地球化学研究所;昆明理工大学 |
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| 摘 要： | 熊耳山片麻岩中最基性的样品可近似代表其原岩,很有可能直接来源于地幔熔融的玄武质岩浆,在伸展构造环境下侵入地壳,从而促使部分地壳物质也发生部分熔融,形成中性-酸性岩浆岩,经历变质作用形成片麻岩。片麻岩的地球化学特征暗示华北克拉通南缘在早元古代仍存在一定程度的陆壳增生。
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| 关 键 词： | 地球化学特征 岩石成因 太华群片麻岩 早元古代 华北熊耳山 |
THE GEOCHEMISTRY AND GENESIS OF XIONGERSHAN LOWER PROTEROZOIC GNEISS |
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| Institution: | LIAO Qing-yuan1,DENG Hong-wei2,YAN Xin-luo1,LIAO Jia-fei1,WANG Yi-zhe3 (1.College of Geosciences,Guilin University of Science & Technology,Guilin 541004)(2.Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510630)(3.Kunming University of Science & Technology,Kunming 650093) |
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| Abstract: | The ultrabasic rock sample in Xiongershan gneiss may approximately represent the original rock,which originates very possibly from the basaltic magma of mantle melt,then intrudes into the crust in the extensional tectonic environment,causes the crust material to melt partially and form intermediate,acid magmatic rock,results in the gneiss because of metamorphism.The geochemical characteristics of gneiss indicate that there was a certain accretion of continental crust in S margin of North China craton in Early Proterozoic. |
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| Keywords: | Geochemistry Petrogenesis Taihua Group Gneiss Early Proterozoic Xiongershan N China |
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