Discussion on the Chronostratigraphic Subdivision of the Ediacaran （Sinian） in the Yangtze Gorges Area, South China

详细信息   

• 责任者：Liu Pengju (Institute of Geology ; Chinese Academy of Geological Science ; Key laboratory of Stratigraphy and Palaeontology Ministry Land and Resources of the People＇s Republic of China ; 100037) ; Yin Chongyu
• 刊名：Acta Geologica Sinica
• 出版年：2012
• 卷期：86(6)
• 关键词：震旦纪 ; Sinian ; 地层划分 ; stratigraphic classification ; 华南地区 ; South China
• 页码：p.849-866
• 图表：illus., 1 table, 110 refs.
• 分类号：1200
• issnNo：ISSN0001-5717
• isbnNo：CN11-1951/P

摘要

The Ediacaran stratum in the Yangtze Gorges area, South China is well-known as it represents the most complete and continuous succession with bundant micro- and macrofossils in China, and is considered as one of the most ideal areas for resolving problem of the chronostratigraphic subdivision and establishing the series and stage boundary-stratotypes of the Ediacaran. According to several accurate isotopic ages, great progresses of the chemostratigraphy and biostratigraphy in recent years, we suggest that the Ediacaran should be subdivided as two series and five stages based on biostratigraphic data and 813C excursion. The lower series named as the Xiadongian which consists of two stages （separately as Jiulongwanian Stage and Chenjiayuanzian Stage）, upper series named as Yangtzean which consists of three stages （separately as Diaoyapoan stage, Fourth Stage and Fifth Stage）. According to the bio-stratigraphy and characteristics of stable carbon isotope stratigraphy, a preliminary correlation of the Ediacaran succession between the Yangtze Gorges and other typical areas has been discussed. However, the current Ediacaran chronostratigraphic subdivision is a preliminary scheme, which needs more work in the future.