鄂尔多斯盆地东北缘煤铀岩系层序地层与煤铀赋存规律研究
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中国地质调查局天津地质调查中心,中国地质调查局天津地质调查中心,中国地质调查局天津地质调查中心,中国地质调查局天津地质调查中心,中国地质调查局天津地质调查中心,内蒙古地质调查院,核工业二〇八大队,内蒙古地质调查院,内蒙古地质调查院,核工业二〇八大队

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国家重点基础研究发展计划(973计划)


Sequence Stratigraphy Study of CoalUranium Bearing Rock Series and Occurrence Regularity Coal and Uranium in the Northeastern Margin of Ordos Basin
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Tianjin Center of Geological Survey,Tianjin Center of Geological Survey,Tianjin Center of Geological Survey,Tianjin Center of Geological Survey,Tianjin Center of Geological Survey,Geological Survey of Inner Mongolia,Geologic Party No.208,Geological Survey of Inner Mongolia,Geological Survey of Inner Mongolia,Geologic Party No.208

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    摘要:

    运用陆相层序地层理论,采用露头、钻孔和地震剖面相结合的手段,在“岩性-岩相-相序”研究基础上,对鄂尔多斯盆地东北缘中—下侏罗统延安组、直罗组进行了层序地层划分。研究表明,延安组可以划分为5个层序、直罗组4个层序,每个层序由低可容空间体系域和高可容空间体系域组成。根据煤层、铀矿赋存特征,及其在层序地层格架中的位置,指出延安组煤层主要赋存在层序高可容纳空间体系域的三角洲平原泥炭沼泽环境中,直罗组含铀岩系主要发育在直罗组下部辫状河沉积岩段,铀矿赋存在低可容纳空间体系域中。结合地质、地球化学、古生物资料,探讨了古气候、构造对煤、铀矿成矿的制约。

    Abstract:

    Based on outcrop, drilling data and seismic sections, and along with the study of lithology, lithofacies and facies sequence, this study defined the sequence stratigraphy of the MiddleLower Jurassic Yan’an Formation and Zhiluo Formation in the northeastern Ordos Basin. Five sequences have been recognized in the Yan’an Formation and four in the Zhiluo Formation. Each sequence is composed of low accommodation systems tract and high accommodation systems tract. Occurrence features of coal sequences and uranium ore deposits and their positions in the sequence column, it can be deduced that the coal of the Yan’an Formation occurs mainly in peat swamp environment of delta plain and the uranium of the Lower Zhiluo Formation occurs mainly in braid river deposit, which respectively represent the high accommodation systems tract and low accommodation systems tract, according to the characteristics and the position in sequence stratigraphic framework of CoalUranium distribution. In combination to geological, geochemical and paleontological data, the paper also discussed restriction of paleclimate and structure on coaluranium mineralization.

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张云,孙立新,张天福,程银行,李艳锋,马海林,鲁超,杨才,郭佳城,周晓光.2016.鄂尔多斯盆地东北缘煤铀岩系层序地层与煤铀赋存规律研究[J].地质学报,90(12):3424-3440.
ZHANG Yun, SUN Lixin, ZHANG Tianfu, CHENG Yinhang, LI Yanfeng, MA Hailin, LU Chao, YANG Cai, GUO Jiacheng, ZHOU Xiaoguang.2016. Sequence Stratigraphy Study of CoalUranium Bearing Rock Series and Occurrence Regularity Coal and Uranium in the Northeastern Margin of Ordos Basin[J]. Acta Geologica Sinica,90(12):3424-3440.

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  • 收稿日期:2016-12-15
  • 最后修改日期:2016-12-15
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  • 在线发布日期: 2017-01-13
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