Ramp facies in an intracratonic basin:A case study from the Upper Devonian and Lower Carboniferous in central Hunan,southern China

作     者：Longyi Shao Dongdong Wang Houan Cai Hao Wang Jing Lu Pengfei Zhang 

作者机构：State Key Laboratory of Coal Resources and Safe Mining and School of Geosciences and Surveying Engineering China University of Mining and Technology （Beijing） Beijing 100083 China 

出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)

年 卷 期：2011年第2卷第3期

页      面：409-419页

学科分类：070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 0704[理学-天文学] 

基　　金：supported by the National Natural Science Foundation of China(No.41030213) the Major National S&T Program of China(2011ZX05009-002) 

主　　题：Intracratonic basin Carbonate ramp Southern China Lower Carboniferous Upper Devonian 

摘      要：Detailed studies on Late Devonian to Early Carboniferous carbonate rocks in central Hunan, southern China have led to the recognition of 25 lithofacies which can be grouped into： （I） inner ramp peritidal platform, （2） inner ramp organic hank and mound, （3） mid ramp, （4） outer ramp, and （5） shelf basin facies associations. The peritidal platform facies association dominates the Zimenqiao Formation （Namurian A or late Datangian） and is characterized by gypsum and dolostone-containing sequences, indicating a peritidal platform environment. The other four facies associations dominate the Menggongao Formation （late Famennian）, Liujiatang Formation （Tournaisian or Yangruanian）, Shidengzi Formations （early Visean or early Datangian）. Five upward-shallowing cycles were distinguished in these three Formations. The predominant facies associations developed in each Formation demonstrate an overall transgression-regression cycle in the Late Devonian to Early Carboniferous in central Hunan. The overall transgressive sequence was preserved in the Shaodong, Menggongao, and Liujiatang Formations, and the overall regressive sequence was preserved in the Liujiatang, Shidengzi, Ceshui and Zimenqiao Formations.