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	Reconstructing marine redox conditions for the transition between Cambrian Series 2 and Cambrian Series 3, Kaili area, Yangtze Platform: Evidence from biogenic sulfur and degree of pyritization
	Guo Q. J. ; Strauss H. ; Zhao Y. L. ; Yang X. L. ; Peng J. ; Yang Y. N. ; Deng Y. A.
	2014
关键词	Cambrian Series 2 and Cambrian Series 3 Sulfide sulfur isotope Degree of pyritization Yangtze Platform carbon-isotope excursion sulfate reservoir seawater sulfate delta-s-34 data evolution china sediments ocean disproportionation fractionation
英文摘要	The transition between Series 2 and Series 3 of the Cambrian Period was a time of environmental perturbations and biological innovations. A generally positive sulfur isotopic composition of sedimentary pyrite with delta S-34(pyrite) values between +1.7 and +373%. is consistent with a biological origin via reduction of strongly S-34 enriched seawater sulfate. No substantial changes in the redox conditions of the water column are discernible from the DOP record, and the sulfide sulfur isotopic composition is independent of DOP, in particular an excursion towards less IS enriched values immediately preceding the proposed level of the Cambrian Series 2 to Cambrian Series 3 transition. This level is also characterized by a negative carbonate carbon isotope excursion, believed to reflect the transgressive flooding of the shelf with basinal anoxic waters. Low DOP values would suggest that these might have been ferruginous rather than sulfidic. (C) 2013 Elsevier B.V. All rights reserved.
出处	Palaeogeography Palaeoclimatology Palaeoecology
卷	398
页	144-153
收录类别	SCI
语种	英语
ISSN号	0031-0182
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/29857]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Guo Q. J.,Strauss H.,Zhao Y. L.,et al. Reconstructing marine redox conditions for the transition between Cambrian Series 2 and Cambrian Series 3, Kaili area, Yangtze Platform: Evidence from biogenic sulfur and degree of pyritization. 2014.

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