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DOI	10.1016/j.gr.2017.02.016
	Structure and magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum
	Zhang, Qinghai; Wendler, Ines; Xu, Xiaoxia; Willems, Helmut; Ding, Lin
通讯作者	Zhang, QH (通讯作者)
发表日期	2017
ISSN	1342-937X
EISSN	1878-0571
起始页码	114
结束页码	123
卷号	46
英文摘要	The Paleocene-Eocene Thermal Maximum (PETM) was a geologically rapid and transient warming event that occurred ca. 56 million years ago (Ma). It was associated with a pronounced negative carbon isotope excursion (CIE) and with profound changes in the atmosphere, hydrosphere and biosphere. This event reflects injections of large amounts of carbon into the atmosphere-ocean system, but, whether single or multiple episodes of carbon release caused this event is uncertain. Here, we present carbon isotope data of bulk carbonate from two parallel limestone sections at Tingri (south Tibet), where the limestone was deposited on a tropical carbonate ramp during the PETM. Carbon isotope data of bulk carbonate from both sections are almost identical, displaying an expanded stepped CIE profile with large magnitude. The stepped CIE profile consists of three discrete intervals of decreasing carbon isotope values, which can be correlated on an inter-regional scale between sections from different depositional environments (lake, carbonate ramp, continental slope, and open ocean). The consistency of these correlations implies occurrence of at least three carbon releases within the CIE and indicates complex processes of carbon injection during the PETM. Moreover, the CIE magnitude of similar to 7 parts per thousand recorded at Tingri is tentatively interpreted to reflect carbon isotope changes in the atmosphere and the surface ocean, which is larger than the generally accepted value of similar to 4 parts per thousand but is still within the range of some previous records. (C) 2017 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
关键词	METHANE HYDRATE RECORD RELEASE CLIMATE END SR STRATIGRAPHY DISSOCIATION EVOLUTION SEAWATER
英文关键词	PETM; Tibet; Bulk carbonate; CIE profile; CIE magnitude
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000399985000007
来源期刊	GONDWANA RESEARCH
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258900
推荐引用方式 GB/T 7714	Zhang, Qinghai,Wendler, Ines,Xu, Xiaoxia,et al. Structure and magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum[J]. 中国科学院青藏高原研究所,2017,46.
APA	Zhang, Qinghai,Wendler, Ines,Xu, Xiaoxia,Willems, Helmut,&Ding, Lin.(2017).Structure and magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum.GONDWANA RESEARCH,46.
MLA	Zhang, Qinghai,et al."Structure and magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum".GONDWANA RESEARCH 46(2017).