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Types of Sedimentary Facies and Sequence Stratigraphy,Early Cretaceous in Tanzhuang-Shenqiu Depression of Zhoukou Sag

KONG Qing-ying~(1,2),CHENG Ri-hui~2,HU Yan-fei~31.Faculty of Natural Resources and Information Technology,China University of Petroleum,Beijing 102249,China2.College of Earth Sciences,Jilin University,Changchun 130061,China3.College of GeoExploration Science and Technology,Jilin University,Changchun 130026,China  
Early Cretaceous terrestrial lake sediments of Zhoukou Sag mostly deposited in Tanzhuang-Shenqiu depression during the stages of Shangshui, Yongfeng and Bacun.The main sedimentary facies can be recognized including alluvial fan,fan delta,shallow lacustrine and deep lacustrine.It is divided into three sequences,being a supper sequence controlled by tectonics.The development of those sequences was controlled directly by lake level variation.Evolution of the sequences reflects that the area had gone through three lake level changes,and tectonics controlled the sequence changes.
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