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Analysis of organic matter characteristics and their controlling factors in the sequence stratigraphic framework:Case study of Jurassic Dongyuemiao member of the Ziliujin Formation in Jiannan area,Upper and Middle Yangtze Region

Liu Ying-jie;Huang Chuan-yan;Yue Jia-heng;Guo Lai-yuan;Key Laboratory of Tectonics and Petroleum Resources of the Ministry of Education,China University of Geosciences;  
Based on three groups of elemental geochemical indicators(Sr/V,Cd/Ca,Zr/Rb),the paper analyzed the paleoclimate,paleoproductivity and hydrodynamic condition,and explained genetic mechanism of organic matter within the sequence stratigraphic framework of Jurassic Dongyuemiao Member of the Ziliujin Formation in Jiannan area of the Upper and Middle Yangtze Region.The study results show that it has own unique characteristics compared with other lacustrine basin.The organic matter of the low-stand system tract(LST)was the richest,that of the lake expand system tract(EST)was relatively rich,while that of the high-stand systems tract(HST)was poor.The organic matter of LST shallow lake facies is richer than that of LST lakeshore.The main controlling factors of the differential characteristics are paleoproductivity and preservation environment of organic matter.
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