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Late Neoproterozoic to early Cambrian sulphur cycle — An isotopic investigation of sedimentary rocks from the Yangtze Platform
Tatiana Goldberg;  Harald Strauss;  Qingjun Guo;  Congqiang Liu
2003
发表期刊Progress in Natural Science
卷号13期号:12页码:946-950
摘要

The sulphur cycle responds to changes in seawater chemistry, biological evolution and tectonic activity. We follow an isotopic approach in order to constrain the state of the ocean/atmosphere system during late Neoproterozoic and early Cambrian. For this purpose, a sedimentary succession deposited on the Yangtze Platform, South China, was analysed for its sulphur isotopic composition in different S-bearing phases. Redox changes were defined by the degree of pyritization (DOP) values in order to show variations in the oxygenation of the depositional environment. The sulphur isotopic composition of late Neoproterozoic to early Cambrian seawater sulphate ranges from +30‰. to +35‰. as evident from trace sulphate in unaltered carbonates and phosphorites. The isotopic composition for pyrite and organic sulphur varies between −16‰. and +23‰.. The apparent sulphur isotopic fractionation between seawater sulphate and pyrite as well as organically bound sulphur varies between 7‰. and 50‰.. This large fractionation, as well as its variability suggests a biological origin for pyrite and organically bound sulphur. The temporal evolution of different geochemical proxy signals is comparable for different successions across the Yangtze Platform.

关键词Sulphur Cycle yangtze Platform stable Isotopes
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/8268
专题环境地球化学国家重点实验室
作者单位1.Geologisch-Paläontologisches Institut, Westfälische Wilhelms-Universität , Corrensstr. 24, 48149, Münster, Germany
2.Institute of Geochemistry, Chinese Academy of Sciences , Guiyang, 550002, China
推荐引用方式
GB/T 7714
Tatiana Goldberg;Harald Strauss;Qingjun Guo;Congqiang Liu. Late Neoproterozoic to early Cambrian sulphur cycle — An isotopic investigation of sedimentary rocks from the Yangtze Platform[J]. Progress in Natural Science,2003,13(12):946-950.
APA Tatiana Goldberg;Harald Strauss;Qingjun Guo;Congqiang Liu.(2003).Late Neoproterozoic to early Cambrian sulphur cycle — An isotopic investigation of sedimentary rocks from the Yangtze Platform.Progress in Natural Science,13(12),946-950.
MLA Tatiana Goldberg;Harald Strauss;Qingjun Guo;Congqiang Liu."Late Neoproterozoic to early Cambrian sulphur cycle — An isotopic investigation of sedimentary rocks from the Yangtze Platform".Progress in Natural Science 13.12(2003):946-950.
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