Mid-Holocene sea-level of northern Yangtze River delta reconstructed by salt marsh peat
Zhan Qing1,2, Wang Zhanghua3
1 Shanghai Institute of Geological Survey, Shanghai 200072
2 College of Resources and Environmental Science,East China Normal University,Shanghai 200062
3 State Key Laboratory of Estuarine and Coastal Research,East China Normal University,Shanghai 200062
This study presents a mid-Holocene sea-level change curve during 8.1～7.3 cal kyr BP and 5.6～5.4 cal kyr BP for Hai′an area in Jiangsu Province,on the northern Yangtze River delta by using radiocarbon-dated and elevation-measured samples of supratidal salt marsh peat and high tidal flat sediments from 4 boreholes, and sediment compaction settlement analysis. The result indicated that the local relative sea level rose, about 1.46m during 8.1～7.3 cal kyr BP. This rate (0.2 cm/yr) contrasted to the rapid sea level rise in early-Holocene (2cm/yr) on the southern Yangtze River delta, which suggested a step-like global sea level rise controlled by the melting of ice sheets. The difference in relative sea-level between the northern and southern Yangtze River delta and other areas in the world indicated the effect of differential subsidence of the Yangtze River coastal region and the hydro-isostasy of the eastern China marginal sea.
Corresponding Authors:
Wang Zhanghua,born in 1973,is a professor of East China Normal University. She is mainly engaged in researches on sedimentary geomorphologic evolution of estuary and delta. E-mail: zhwang@geo.ecnu.edu.cn.
About author: Zhan Qing,born in 1983,is an engineer with a doctoral degree. He is mainly engaged in researches on sedimentary geomorphologic evolution of estuary and delta. E-mail: zhanqing5203893@163.com.
Cite this article:
Zhan Qing,Wang Zhanghua. Mid-Holocene sea-level of northern Yangtze River delta reconstructed by salt marsh peat[J]. JOPC, 2014, 16(4): 548-556.
Zhan Qing,Wang Zhanghua. Mid-Holocene sea-level of northern Yangtze River delta reconstructed by salt marsh peat[J]. JOPC, 2014, 16(4): 548-556.
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