globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2016.11.007
论文题名:
Paleo-environmental cyclicity in the Early Silurian Yangtze Sea (South China): Tectonic or glacio-eustatic control?
作者: Liu Z.; Algeo T.J.; Guo X.; Fan J.; Du X.; Lu Y.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
卷: 466
起始页码: 59
结束页码: 76
语种: 英语
英文关键词: Eustasy ; Hirnantian ; Kwangsian orogeny ; Organic carbon ; Redox ; Sea level
英文摘要: The Yangtze Sea of the South China Craton experienced strong environmental perturbations during the first ~ 5-6 Myr of the Silurian. The Lower Silurian Lungmachi Formation in the Jiaoye-1 drillcore (Chongqing, China) records three sea-level cycles (stratigraphic sequences) characterized by rapid deepening at the base of each cycle followed by slow shallowing. Each deepening event was associated with shifts toward higher marine productivity, more intensely reducing bottomwater conditions, reduced watermass restriction, lower detrital input, and enhanced siliciclastic weathering intensity. We infer control by glacio-eustasy, in which deglacial sea-level rises and concurrent climatic warming triggered the observed environmental changes. Shallowing was associated with renewed glaciation and characterized by the opposite set of conditions. The results of this study thus provide evidence in support of continued continental glaciation during the Early Silurian, i.e., following the termination of the major end-Ordovician Hirnantian glaciation. The study core also exhibits a long-term shallowing trend through the entire Lower Silurian, the origin of which may have been tectono-epeirogenic uplift of the South China Craton during the Kwangsian Orogeny. © 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/68034
Appears in Collections:过去全球变化的重建

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作者单位: Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Wuhan, China; Department of Geology, University of Cincinnati, Cincinnati, OH, United States; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China; State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, China; Exploration Southern Company, SINOPEC, Chengdu, Sichuan, China; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China

Recommended Citation:
Liu Z.,Algeo T.J.,Guo X.,et al. Paleo-environmental cyclicity in the Early Silurian Yangtze Sea (South China): Tectonic or glacio-eustatic control?[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01,466
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