| 珙县恐龙化石埋藏地自流井组泥质岩地球化学特征及其对物源区和古风化作用的指示 |
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| 引用本文： | 梁斌,王全伟,阚泽忠.珙县恐龙化石埋藏地自流井组泥质岩地球化学特征及其对物源区和古风化作用的指示[J].矿物岩石,2006,26(3):94-99. |
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| 作者姓名： | 梁斌 王全伟 阚泽忠 |
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| 作者单位： | 1. 西南科技大学环境与资源学院,四川,绵阳,621000;四川省地质调查院,四川,成都,610081
2. 四川省地质调查院,四川,成都,610081 |
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| 基金项目： | 中国地质调查局“四川盆地中生代恐龙动物群研究”项目（200313000051） |
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| 摘 要： | 四川珙县恐龙化石埋藏地是四川盆地早侏罗世重要的恐龙化石点,恐龙化石埋藏于下侏罗统自流井组之中。对该恐龙化石埋藏地自流井组泥质岩的常量元素、微量元素和稀土元素特征进行了研究,并根据其地球化学特征讨论了物源区性质、构造背景以及物源区的风化特征。常量元素和稀土元素表明其物源区以长英质岩石为主,构造背景为被动大陆边缘;反映化学风化程度的C IA指数及成分成熟度的ICV指数,表明物源区经历了较强的化学风化作用,反映了早侏罗世恐龙生活在一个温暖潮湿的古气候环境之中。
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| 关 键 词： | 地球化学 泥岩 恐龙 侏罗系 四川盆地 |
| 文章编号： | 1001-6872（2006）03-0094-06 |
| 收稿时间： | 2006-05-23 |
| 修稿时间： | 2006-05-232006-08-20 |
GEOCHEMISTRY OF EARLY JURASSIC MUDROCKS FROM ZILIUJING FORMATION AND IMPLICATIONS FOR SOURCE-AREA AND WEATHERING IN DINOSAUR FOSSILS SITE IN GONGXIAN,SICHUAN PROVINCE |
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| LIANG Bin,WANG Quan-wei,KAN Ze-zhong.GEOCHEMISTRY OF EARLY JURASSIC MUDROCKS FROM ZILIUJING FORMATION AND IMPLICATIONS FOR SOURCE-AREA AND WEATHERING IN DINOSAUR FOSSILS SITE IN GONGXIAN,SICHUAN PROVINCE[J].Journal of Mineralogy and Petrology,2006,26(3):94-99. |
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| Authors: | LIANG Bin WANG Quan-wei KAN Ze-zhong |
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| Institution: | 1. Faculty of Resource and Environment,Southwest University of Science and Technology, Mianyang 621000 ,China ; 2. Geological Survey of Sichuan Province,Chengdu 610081,China |
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| Abstract: | Gongxin dinosaur fossils site is an important fossils site in Sichuan basin and the dinosaur fossils are buried in early Jurassic Ziliujing Formation.The chemical compositions of major and trace elements in mudrocks in dinosaur fossil site have been investigated to determine the provenance,tectonic setting and weathering of source-area.The geochemical characteristics of mudrock indicate that original source area is characterized by felsic rocks,tectonic setting belongs to passive continental margin.Chemical Index of Alteration(CIA) indices and Index Chemical Variation(ICV) indices reveal that the source area experienced strongly chemical weathering process,suggesting that the dinosaur lived in warm and wet climate environment in early Jurussic. |
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| Keywords: | geochemistry mudrock dinosaur Jurassic Sichuan basin |
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