Microfacies and paleoenvironment of microbialites of the Cambrian(Stage 4)Qingxudong Formation in the Huayuan area,northwestern Hunan Province,southern China

作     者：Zhong-Tang Su De-Min Zhang Jie Tang Pei-Jie Sun Zhen-Feng Luo Hui Ma Zhong-Tang Su;De-Min Zhang;Jie Tang;Pei-Jie Sun;Zhen-Feng Luo;Hui Ma

作者机构：State Key Laboratory of Oil and Gas Reservoir Geology and ExploitationChengdu University of TechnologyChengdu 610059Sichuan ProvinceChina Key Laboratory of Deep-time Geography and Environment Reconstruction and Applications of Ministry of Natural ResourceChengdu University of TechnologyChengdu 610059Sichuan ProvinceChina Institute of Sedimentary GeologyChengdu University of TechnologyChengdu 610059Sichuan ProvinceChina Sinopec Petroleum Exploration and Production Research InstutiteBeijing 100083China 

出 版 物：《Journal of Palaeogeography》 (古地理学报（英文版）)

年 卷 期：2023年第12卷第4期

页      面：587-602页

核心收录：

学科分类：0709[理学-地质学] 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(NSFC No.41972104) 

主　　题：Microfacies Microbialite Carbonates Epiphyton Cambrian Yangtze craton Sea level 

摘      要：After the extinction of Archaeocyatha(sponges),microbial bioherms were well developed in the lower Cambrian of the Yangtze cratonic basin,especially in the Qingxudong Formation(Cambrian(Stage 4))of the Huayuan area,northwestern Hunan Province,southern ***,four sections from this area were chosen for investigating and analyzing their microfacies and depositional *** microfacies types were recognized through petrographic analysis of textural attributes and calcimicrobes(including Epiphyton,Renalcis,Girvanella and Kenella),respectively as:laminated calcareous mudstone(MF1),algal wackestone(MF2),intraclastic grainstone(MF3),algal intrasparrudite(MF4),oolitic algal intrasparrudite(MF5),sparry oolitic grainstone(MF6),Epiphyton framestone(MF7),Renalcis bafflestone(MF8),Kenella bafflestone(MF9),Girvanella boundstone(MF10),thrombolitic boundstone(MF11),and dolomite(MF12).These microfacies represent four major depositional environments:carbonate ramp,carbonate platform,slope and tidal *** played an important role in the transition from carbonate ramp to platform,while the evolution from ramp to tidal flat must be ascribed to sea-level fall during the Cambrian Age 4.