Sedimentary characteristics and depositional evolution of carbonate platform during the Cambrian and Ordovician in eastern Tarim Basin,NW China

作     者：Jingyan LIU Shiqiang XIA Junlong ZHANG Feng HE Yuhan CHENG Yi ZHU Zhaoqin CHEN Huoxiang DONG Jingyan LIU;Shiqiang XIA;Junlong ZHANG;Feng HE;Yuhan CHENG;Yi ZHU;Zhaoqin CHEN;Huoxiang DONG

作者机构：School of Energy ResourcesChina University of Geosciences(Beijing)Beijing 100083China College of Mining EngineeringNorth China University of Science and TechnologyTangshan 063210China Exploration and Development Research InstituteDaqing Oilfield CompanyPetroChinaDaqing 163712China Beijing Research Institute of Uranium GeologyBeijing 100029China 

出 版 物：《Frontiers of Earth Science》 (地球科学前沿（英文版）)

年 卷 期：2023年第17卷第2期

页      面：470-486页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 

基　　金：National Natural Science Foundation of China(Grant No.U19B6003-01-01) 

主　　题：carbonate platform depositional evolution sedimentary facies Tarim Basin the Cambrian-Ordovician 

摘      要：The eastern Tarim Basin(Tadong Area)has gained wide attentions on large-scale marine carbonate reservoirs in Cambrian-Ordovician due to significant hydrocarbon discoveries.A systematic analysis combining thin sections,cores,wireline logs,and seismic data is conducted on Cambrian-Ordovician carbonate platform in the whole eastern Tarim Basin,including Gucheng area,Majiaer area,and western Luobopo rise(Luoxi area).The results show that 8 sub-facies and more than 10 microfacies are developed including open platform,restricted/semi-restricted platform,reef-shoal around platform margin,drowned platform,foreslope,neritic platform,and deep-water *** both key areas for hosting petroleum reserves during the Cambrian and Ordovician,the Luoxi area is dominated by deep-water basin facies,while the Gucheng area is dominated by neritic platform facies and deep-water basin facies during the Lower *** deposition evolution during the whole Cambrian is dominated by slope facies and deep-water facies,platform margin facies,and platform *** contrast,it is dominated by open platform facies during the whole *** depositional evolution of carbonate platform is mainly controlled by paleo-geomorphology and sea-level *** distribution of paleo-geomorphologic units plays an important role in controlling types and distributions of carbonate platform *** transgression assists in growth of reef-shoal complex and lime mud mound in the Early ***,with neritic platform and slope being to disappeared,in the Middle Ordovician,platform margin facies are well developed in Gucheng *** facies and deepwater basin facies are widely ***,carbonate platform is drowned due to sea level rising in the Late *** depositional evolution of carbonate platform coinciding falling and rising of sea-level changes can be beneficial for appropriate carbonate reservoirs identification and petroleum exploration.