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自贡沙溪庙组地球化学特征及其对物源区和古风化的指示

文章导航 > 沉积与特提斯地质 > 2007 > 27(4): 17-21

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王全伟, 梁斌, 阚泽忠. 自贡沙溪庙组地球化学特征及其对物源区和古风化的指示[J]. 沉积与特提斯地质, 2007, 27(4): 17-21.
引用本文: 王全伟, 梁斌, 阚泽忠. 自贡沙溪庙组地球化学特征及其对物源区和古风化的指示[J]. 沉积与特提斯地质, 2007, 27(4): 17-21.
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WANG Quan-wei, LIANG Bin, KAN Ze-zhong. Geochemistry and implications for the source areas and weathering in the Shaximiao Formation, Zigong, Sichuan[J]. Sedimentary Geology and Tethyan Geology, 2007, 27(4): 17-21.
Citation: WANG Quan-wei, LIANG Bin, KAN Ze-zhong. Geochemistry and implications for the source areas and weathering in the Shaximiao Formation, Zigong, Sichuan[J]. Sedimentary Geology and Tethyan Geology, 2007, 27(4): 17-21.
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自贡沙溪庙组地球化学特征及其对物源区和古风化的指示

  • 1. 四川省地质调查院, 四川成都 610081;
    2 西南科技大学环境与资源学院, 四川绵阳 621000

Geochemistry and implications for the source areas and weathering in the Shaximiao Formation, Zigong, Sichuan

  • 1. Sichuan Institute of Geological Survey, Chengdu 610081, Sichuan, China;
    2. College of Environments and Resources, Southwest University of Science and Technology, Mianyang 621000, Sichuan, China

    摘要
  • 本文对中侏罗统沙溪庙组泥质岩的主量元素、微量元素和稀土元素特征进行了研究,并讨论了物源区性质以及风化特征。物源区以长英质岩石为主,指示化学风化程度的CIA指数及成分成熟度的ICV指数,表明经历了低-中等的化学风化作用,反映了中侏罗世的半干旱气候环境。
    The emphasis is placed upon the examination of the major elements, trace elements and REEs in the mudstone and approaches to the provenance and weathering in the Middle Jurassic Shaximiao Formation, Zigong, Sichuan. The study of major elements and REEs shows that the detritus are derived mostly from the felsic rocks in the source areas. The CIA (chemical index of alteration) and ICV (index of chemical variation) indexes suggest a low to moderate chemical weathering, implying that the study area was once in the semi-arid palaeoclimatic conditions during the Middle Jurassic.
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出版历程
收稿日期:  2007-06-11
刊出日期:  2007-12-30

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