| 中扬子地区下三叠统大冶组瘤状灰岩成因研究 |
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| 引用本文： | 袁志华.中扬子地区下三叠统大冶组瘤状灰岩成因研究[J].地球化学,1998(3). |
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| 作者姓名： | 袁志华 |
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| 作者单位： | 江汉石油学院分析测试研究中心!荆州，434102 |
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| 摘 要： | 本文从基本特征出发，结合岩石学特征，尤其是化学成分及同位素组成等特征，对中扬子地区下三叠统大冶组瘤状灰岩的成因进行了探讨．研究表明，在深水盆地和台缘斜坡下部的沉积环境中，由于周期性的瞬时动荡水体的作用，导致沉积物来源的差异性，再经过成岩作用期的差异压溶作用，形成了本区下三叠统大冶组瘤状灰岩。
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| 关 键 词： | 化学成分 同位素 瘤状灰岩 三叠系 中扬子地区 |
ORIGIN OF NODULAR LIMESTONE WITHIN DAYE FORMATION OF LOWER TRIASSIC IN THE MIDDLE YANGTZE REGION |
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| Yuan Zhihua.ORIGIN OF NODULAR LIMESTONE WITHIN DAYE FORMATION OF LOWER TRIASSIC IN THE MIDDLE YANGTZE REGION[J].Geochimica,1998(3). |
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| Authors: | Yuan Zhihua |
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| Abstract: | The origin of the nodular limestone of Daye Formation of Lower Triassic in the Middle Yangtze region is studied on the basis of their petrologic characterishcs,chemical and isotopic compositions. It is suggested that the nodular limestone was mainly formed through differential compaction during diagenesis. This process took place in the sedimentary environment of a deep basin and in the lower parts of marginal slope of platform, as a result of instantaneous vibration of water that gave rise to differentiation of sediments. |
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| Keywords: | chemical composition isotope nodular limestone Triassic Middle Yangtze region |
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