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	Carbon Isotopic Evolution of the Late Ediacaran Gaojiashan Biota on the Northern Yangtze Platform, South China
	Guo Q. J. ; Deng Y. N. ; Yang X. L.
	2012
关键词	Ediacaran carbonate and organic carbon isotopic composition Gaojiashan biota Ningqiang Yangtze Platform seawater chemostratigraphy preservation doushantuo record
英文摘要	Metazoan fossils in the Gaojiashan Biota are famous for being well preserved and may provide new insights into the early evolution and skeletonization of Metazoans. We are studying the isotopic compositions of organic and carbonate carbon from a sequence of sedimentary rocks at the Gaojiashan section, northern Yangtze Platform, Shaanxi Province of China. Organic carbon isotope values display a range between -30.8 parts per thousand and -24.7 parts per thousand with clear stratigraphic variations. Carbonate carbon isotope data vary between 0.1 parts per thousand and +6 parts per thousand. Positive d13C values from sediments with Gaojiashan biota reflect temporal variations in carbon turnover, i.e. an increasing in photosynthetic carbon fixation followed by an increasing subsequent fractional organic carbon burial, and that related to bio-radiation such as increasing algae, bacteria, and original creatures productivity in biomass. These secular variations are interpreted to reflect perturbations of the regional carbon cycle, specifically changes in the fractional burial of organic carbon, and discuss the relationship between Gaojiashan biota and paleoenvrionmental variation.
出处	Acta Geologica Sinica-English Edition
卷	86
期	6
页	1447-1454
收录类别	SCI
语种	英语
ISSN号	1000-9515
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/30867]
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.,Deng Y. N.,Yang X. L.. Carbon Isotopic Evolution of the Late Ediacaran Gaojiashan Biota on the Northern Yangtze Platform, South China. 2012.

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