The Late Ordovician Drowning of the Yangtze Carbonate Platform and Its Geologic Significance

详细信息   

• 责任者：Yan Detian (Key Laboratory of Tectonics and Petroleum Resources ; Education Ministry ; China University of Geosciences ; Wuhan 430074 ; China) ; Wang Qingchen
• 刊名：Chinese Journal of Geology
• 出版年：2011
• 卷期：46(1)
• 关键词：碳酸盐台地 ; carbonate platforms ; 油气藏形成 ; reservoir formation ; 扬子地台 ; Yangtze Platform
• 页码：p.42-51
• 图表：4 illus., 15 refs.
• 分类号：1003
• 出版序号：20120335
• issnNo：ISSN0563-5020
• isbnNo：CN11-1937/P

摘要

The drowning of the carbonate platform is one of the most spectacular geological processes in the Late Ordovician on Yangtze block. Based on sedimentological and palaeontologic data, the drowning process of Late Ordovician carbonate platforms and geologic consequence in Yangtze area, as well as its significance for oil exploration, were documented. The results indicate the following facts：1) during the Baota and Linxiang periods of Late Ordovician, epicontinental carbonate platform occupied most of the Yangtze block ;  2) drowning occurred in the early stage of Wufeng period, due to a rapid rise in sea level resulted from tectonic flexure;  and 3) during the drawing stage, widespread black shales of Wufeng Formation were deposited on the Yangtze block,which are served as favourable source rocks for hydrocarbons in the region.