globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2016.08.017
论文题名:
Methane-derived authigenic carbonate from the lower Doushantuo Formation of South China: Implications for seawater sulfate concentration and global carbon cycle in the early Ediacaran ocean
作者: Zhou C.; Guan C.; Cui H.; Ouyang Q.; Wang W.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 461
起始页码: 145
结束页码: 155
语种: 英语
英文关键词: Anaerobic oxidation of methane ; Carbon cycle ; Carbon isotope chemostratigraphy ; Cold seep deposits ; Microbial sulfate reduction ; Sulfur cycle
英文摘要: Authigenic carbonate associated with anaerobic oxidation of methane (AOM), usually via microbial sulfate reduction (MSR) or ferric iron reduction, is generally characterized by extremely low δ13C values (<− 30‰, VPDB). This has been used as one of the major diagnostic features for the recognition of hydrocarbon seep carbonate in the geological past. Previous reports on Precambrian authigenic carbonates are rare, limiting our understanding of the effects of their deposition on the Earth's carbon isotopic mass balance. In this study, mainly based on petrographic features and pronounced negative δ13C values as low as − 38.1‰, we discovered authigenic calcite cement immediately above the cap dolostone in the basal Ediacaran Doushantuo Formation in the Jiulongwan section, Yangtze Gorges area, South China. Our observations not only provide direct evidence for the involvement of AOM during carbonate precipitation in the early Ediacaran (~ 635 Ma), but also suggest that the seawater sulfate concentrations in the early Ediacaran may have been higher than previously thought. © 2016 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68222
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作者单位: Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China; Department of Geoscience and NASA Astrobiology Institute, University of Wisconsin, Madison, WI, United States; University of Chinese Academy of Sciences, Beijing, China

Recommended Citation:
Zhou C.,Guan C.,Cui H.,et al. Methane-derived authigenic carbonate from the lower Doushantuo Formation of South China: Implications for seawater sulfate concentration and global carbon cycle in the early Ediacaran ocean[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,461
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