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河南省石炭—二叠系层序地层及聚煤作用研究

The Study of Carboniferous-Permian Sequence Stratigraphic and Coal Accumulation in Henan Province

【作者】 宋建军

【导师】 邵龙义;

【作者基本信息】 中国矿业大学(北京) , 地质工程, 2009, 博士

【摘要】 运用沉积学、层序地层学、煤田地质学等理论,研究了河南省石炭-二叠系层序地层格架及聚煤作用。结合构造背景及地层特征,明确了研究区的古地理背景;通过沉积环境分析,在河南省石炭、二叠系识别出17种岩相类型和碳酸盐台地—泻湖、潮坪、三角洲、近海湖泊四种沉积体系;通过层序地层研究,在河南省石炭-二叠系识别出8个三级层序界面,划分为7个三级层序,建立了华北地台南缘(河南省境内)晚古生代石炭-二叠系含煤地层三级层序地层格架,恢复了华北地台南缘(河南省境内)晚古生代石炭-二叠系含煤地层从海向陆地演化的三级层序岩相古地理古面貌;总结了华北地台南缘(河南省境内)晚古生代石炭-二叠系含煤地层碳酸盐台地泥炭沼泽,潮坪泥炭沼泽,三角洲泥炭沼泽聚煤特征和规律;建立了华北地台南缘(河南省境内)晚古生代河南省石炭-二叠系含煤岩系层序格架下,由低可容空间(三角洲环境)、中可容空间(潮坪环境)和高可容空间(碳酸盐台地-泻湖环境)组成的近海型聚煤模式

【Abstract】 The author studied the sequence stratigraphic framework and coal accumulation of the Carboniferous-Permian in Henan province using sedimentology, sequence stratigraphy, coalfield geology and other theories. The paleogeographic settings of research area were definite through comprehensive analysis of tectonic background and stratigraphic characteristics. The recognitions of seventeen types of lithofacies and four sedimentary systems which includes carbonate platform-lagoon systems, tidal flat systems,delta systems, and offshore lacustrine systems, were obtained for the Carboniferous-Permian in Henan province. Seven third-order sequences are preserved within the Carboniferous-Permian in Henan province and separated by eight sequences boundaries. Third-order Sequence stratigraphic framework of late Palaeozoic Carboniferous-Permian are based, paleogeography and paleogeomorphic of third-order Sequence which is evolution from sea to land are restored, and then concentrating coal characteristics and law of carbonate platform,tidal flat and delta peat swamp of Carboniferous-Permian coal measures are summarized in southern north china craton(in Henan Province). Offshore Coal accumulation model which is consistituted by low accommodation (delta environment), middle accommodation (tidal flat environment) and high accommodation (carbonate platform-lagoon environment) are established under sequence stratigraphic framework of Carboniferous-Permian coal measures in Henan Province.

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