Implications of TS/TOC for sedimentary environments
of the southern Changjiang delta plain
Wu Xuxu1 Wang Zhanghua2 He Zhongfa3
1 Department of Geography，East China Normal University，Shanghai 200062
2 State Key Laboratory for Estuarine and Coastal Research，Ease China Normal University，Shanghai 200062
3 Shanghai Geological Survey，Shanghai 200072
The present paper investigated the total sulfur(TS) content，total organic carbon(TOC) content，chloridion ion concentration and pH value in 12 sediment sections(2.5 m long for each)from different geomorphologic units of the southern Changjiang delta plain.The regression line slopes of TS/TOC plots were also calculated for sediments from the lacustrine plain，delta plain，and modern tidal flat.We tend to examine the major factors for sulfur distribution in the Changjiang estuary and assess the feasibility of applying TS-TOC in distinguishing sedimentary environments.The results demonstrate that average values of TS/TOC of sediment sections H2～H8 from the delta plain vary from 0.026 to 0.044.There is a significant correlation between TS and TOC and the regression line slope being 0.027.TS/TOC values are 0.029～0.032 and regression line slope is 0.037 in sediment sections H10～H12 from the lacustrine plain.TS/TOC is much higher，being 0.130 in H9 from the modern tidal flat of the Hangzhou Bay.Regression slope is also significantly higher as being 0.117.For H1 located at the modern tidal flat of Chongming island，the average value of TS/TOC is 0.055 and the regression slope is 0.054.The distribution of TS/TOC and the regression slope of TS-TOC plots indicates that it could be a useful tool to distinguish sedimentary environments in the Changjiang River delta.In addition，the values of TS/TOC and regression slope of TS-TOC plots of the study area are clear lower than those of other brackish coastal deposits，reflecting the characteristics of large river mouth with huge quantity of freshwater and sediment discharge.
About author: Wu Xuxu，born in 1987，is a master candidate，and is engaged in the study of organic elemental activities in the estuarine sediments.E-mail:tungawu@hotmail.com. About the corresponding author Wang Zhanghua, is a professor，is engaged in the study of environmental change of the estuary and delta.E-mail:zhwang@geo.ecnu.edu.cn.
Cite this article:
Wu Xuxu,Wang Zhanghua,He Zhongfa. Implications of TS/TOC for sedimentary environments
of the southern Changjiang delta plain[J]. JOURNAL OF PALAEOGEOGRAPHY, 2012, 14(6): 821-800.
Wu Xuxu,Wang Zhanghua,He Zhongfa. Implications of TS/TOC for sedimentary environments
of the southern Changjiang delta plain[J]. JOPC, 2012, 14(6): 821-800.
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