Sedimentary succession and environment evolution of the Taiyuan Formation in northeastern Qinshui Basin, Shanxi Province
Song Hui-Bo1,3, Li Ya-Nan1, Yu Zhen-Feng2, Liu Shun-Xi1, Hu Bin1, Li Zi-Yuan1
1 School of Resources and Environment,Henan Polytechnic University,Jiaozuo 454003,Henan; 2 State Key Laboratory of Coal and Coalbed Methane Co-Mining,Jincheng 048200,Shanxi; 3 Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region of Henan Province,Jiaozuo 454000,Henan
Abstract：The Upper Carboniferous-Lower Permian Taiyuan Formation in northeastern Qinshui Basin of Shanxi Province contains abundant coal and coalbed methane resources,and well outcrops in the area of Heituyan village in Xiyang County. Based on the researches of the outcrop section and some nearby exploration data,this paper detailedly analyzes the lithologic characteristics,sedimentary structures,fossil composition,carbonatite microfacies and sedimentary succession types of the formation and obtains the results as follows: Three kinds of sedimentary systems(including barrier shore,open shore and delta),five kinds of sedimentary facies,three kinds of sedimentary subfacies and five kinds of carbonate microfacies were recognized,and the mixed tidal flat deposits in the middle part of the Taiyuan Formation were found in this area. On this basis,nine types of sedimentary succession and their palaeoenvironment model were suggested. According to the vertical change tendency of sedimentary successions,this paper proposes the sedimentary environment model of the Taiyuan Formation and briefly discusses the evolution process of depositional environments,i.e.,from the bottom to top,ranging from barrier island-lagoon-tidal flat to shallow sea-tidal flat,and then to delta environments.
Song Hui-Bo,Li Ya-Nan,Yu Zhen-Feng et al. Sedimentary succession and environment evolution of the Taiyuan Formation in northeastern Qinshui Basin, Shanxi Province[J]. JOPC, 2018, 20(4): 623-636.
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