| 秦岭造山带沉积物源地球化学研究及其构造意义 |
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| 引用本文： | 欧阳建平,张本仁.秦岭造山带沉积物源地球化学研究及其构造意义[J].地球科学,1996,21(5):464-468. |
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| 作者姓名： | 欧阳建平 张本仁 |
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| 作者单位： | Faculty of Earth Sciences，China University of Geosciences，Wuhan 430074 |
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| 基金项目： | 国家自然科学基金,国家教委博士点基金,地矿部壳幔体系组成、物质交换及动力学开放研究实验室基金 |
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| 摘 要： | 在秦岭造山带内，由前寒武纪基底岩层组成的隆起区和由显生宙地层构造的沉积盆地广泛共存，不同构造单元，不同地段的前寒武纪地层在Ｔｈ等微量元素和Ｓｍ／Ｎｄ比值特征上明显不同，通过对比不同时代的显生宙沉积地层与相关前寒武纪地层之间Ｔｈ含量和Ｓｍ／Ｎｄ比值，研究了各沉积小区碎屑沉积物随时代变化而发生的物源变化，由此讨论了南，北秦岭之间以及与扬子北缘之间前寒武纪基底抬升和块体聚会的时限。
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| 关 键 词： | 沉积区 碎屑沉积物 地球化学 秦岭 造山带 |
GEOCHEMISTRY OF SEDIMENTARY PROVENANCE IN QINLING OROGENIC BELT AND ITS IMPLICATIONS FOR TECTONIC EVOLUTION |
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| Ouyang Jianping,Zhang Benren.GEOCHEMISTRY OF SEDIMENTARY PROVENANCE IN QINLING OROGENIC BELT AND ITS IMPLICATIONS FOR TECTONIC EVOLUTION[J].Earth Science-Journal of China University of Geosciences,1996,21(5):464-468. |
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| Authors: | Ouyang Jianping Zhang Benren |
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| Abstract: | Many uplifted areas composed of Precambrian stratigraphic units and many Phanerozoic sedimentary basins coexist in the Qinling orogenic belt.The different Precambrian strata in various places and tectonic units show their own distinctive Th contents and Sm/Nd ratios.The source and its change with the time of clastic sediments in several major stratigraphic subunits are studied by comparing the Th content and Sm/Nd ratio values between the Phanerozoic sediments of different ages and the related Precambrian strata.The timing of the uplift of some Precambrian basements and of convergence between the North and South Qinling blocks is discussed. |
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| Keywords: | uplifted area sedimentary basin clastic sediment geochemistry Qinling orogenic belt |
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