Sedimentary Characteristics of an Ancient River Channel in Zhenjiang-Jiangdu Segment of Yangtze River Delta

• 责任者：Yang Xianzhong (Nanjing Institute of Geology and Mineral Resources ; Nanjing 210016 ; China) ; Wei Naiyi
• 刊名：Marine Geology & Quaternary Geology
• 出版年：2010
• 卷期：30(5)
• 关键词：沉积相 ; sedimentary facies ; 河口三角洲 ; river mouth delta ; 长江 ; Yangtze River
• 页码：p.11-18
• 图表：3 illus., 1 table, 38 refs.
• 分类号：1400
• issnNo：ISSN0256-1492
• isbnNo：CN37-1117/P

The study of a total of six drilling holes located in N-S direction in Jiangdu area, Jiangsu Province reveals that there occurred braided fluvial sediments in the Zhenjiang (Dagang)-Jiangdu segment of the Yangtze River, deposited during late Late Pleistocene including Marine Isotope Stage (MIS)3.  In the last glacial maximum, the global sea level dropped dramaticly, and an incised-river channel was formed in Zhenjiang-Jiangdu area.  The post-glacial transgression caused by sea level rise led to the channel filling and the formation of the sequence from the river channel to floodplain, estuary and deltaic facies in a succession upwards.  Yellow gravelly sand deposited in early post-glacial stage was distributed extensively in the channel, and may be used as a marker.