globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2016.02.041
论文题名:
Sulfur isotope constraints on marine transgression in the lacustrine Upper Cretaceous Songliao Basin, northeastern China
作者: Cao H.; Kaufman A.J.; Shan X.; Cui H.; Zhang G.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 451
起始页码: 152
结束页码: 163
语种: 英语
英文关键词: C/S ; Campanian ; Carbon isotope ; Nenjiang formation ; Santonian ; Songliao basin ; Sulfur isotope ; Transgression
英文摘要: Organic-rich Cretaceous source rocks of the petroliferous Songliao Basin in northeast China are considered to be lacustrine in origin, but paleontological and organic geochemical evidence suggest episodic marine incursions. As a test of this hypothesis, we applied time-series measurements of elemental and isotopic abundances on core and cutting samples to evaluate fluctuations in the sulfur and carbon cycles across the Santonian-Campanian transition preserved in the upper Yaojia and lower Nenjiang formations. The data reveal a spike in pyrite sulfur abundance and a marked negative excursion in δ34S at the base of the Nenjiang Formation when the basin expanded to its maximal extent. The elemental and isotopic data suggest that flooding was associated with rapid marine transgression that enhanced sulfate concentrations, which promoted microbial sulfate reduction in anoxic bottom waters that were episodically euxinic. Subsequent restriction of the basin and a decline in marine influence is supported by progressive upsection 34S enrichment (up to 30‰) in Nenjiang Member I, which are interpreted to reflect the distillation of sulfate through enhanced pyrite burial, followed by a gradual return to lacustrine conditions that prevailed in overlying strata. © 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/68432
Appears in Collections:过去全球变化的重建

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作者单位: College of Earth Sciences, Jilin University, Changchun, China; Department of Geology and Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States; Department of Geology, University of Maryland, College Park, MD, United States; CAS Key Laboratory of Crust-Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China

Recommended Citation:
Cao H.,Kaufman A.J.,Shan X.,et al. Sulfur isotope constraints on marine transgression in the lacustrine Upper Cretaceous Songliao Basin, northeastern China[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,451
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