气候变化领域集成服务门户(CCPortal): An ecological response to the Eocene/Oligocene transition revealed by the delta(13)G(TOC) record, Lanzhou Basin, NE Tibetan Plateau

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DOI	10.1016/j.jseaes.2018.03.020
	An ecological response to the Eocene/Oligocene transition revealed by the delta(13)G(TOC) record, Lanzhou Basin, NE Tibetan Plateau
	Wu, Fuli; Zhao, Yan; Fang, Xiaomin; Meng, Qingquan
通讯作者	Wu, FL (通讯作者)
发表日期	2018
ISSN	1367-9120
EISSN	1878-5786
起始页码	74
结束页码	80
卷号	159
英文摘要	The Eocene/Oligocene (E/O) transition, corresponds to an abrupt global cooling, thought to have been one of the greatest temperature changes in the mid-Cenozoic Earth's history. Sparse studies have successfully reconstructed the terrestrial ecological response to this temperature change. Here, we report results from the study of organic carbon isotopes (delta C-13(TOC)), together with n-alkanes biomarker analysis, in the Yongdeng Section, Lanzhou Basin, Northwest China, and discuss changes in delta C-13(TOC) and their mechanisms. The results show that between 35.3 Ma and 31.0 Ma, delta C-13(TOC) ranged from- 26.72 parts per thousand to- 21.27 parts per thousand. The main change occurred at 33.4 Ma, when 813Groc became heavier by 3 parts per thousand. At this time the long-chain n-alkane members (C-27, C-29 and C-31) were dominant, suggesting the most likely sources of organic matter were terrestrial plants. Combining these results with existing measurements of plant delta C-13(TOC) and sporopollen data in adjacent areas, we infer that this change at 33.4 Ma might have been caused by an increase in gymnosperm content especially coniferous trees adapted to cold climates, which have a heavier delta C-13(TOC) than that of the angiosperms, this would have been a response to the global cooling characteristic of this period.
关键词	CARBON ISOTOPIC COMPOSITION EOCENE-OLIGOCENE TRANSITION CHINESE-LOESS-PLATEAU ATMOSPHERIC CO2 ORGANIC-MATTER XINING BASIN PALYNOLOGICAL RECORD ENVIRONMENTAL-CHANGE VEGETATION CHANGE C-13/C-12 RATIOS
英文关键词	delta(13)Croc; Eocene/Oligocene transition; Temperature; Gymnosperms
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000436213700008
来源期刊	JOURNAL OF ASIAN EARTH SCIENCES
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/259258
推荐引用方式 GB/T 7714	Wu, Fuli,Zhao, Yan,Fang, Xiaomin,et al. An ecological response to the Eocene/Oligocene transition revealed by the delta(13)G(TOC) record, Lanzhou Basin, NE Tibetan Plateau[J]. 中国科学院青藏高原研究所,2018,159.
APA	Wu, Fuli,Zhao, Yan,Fang, Xiaomin,&Meng, Qingquan.(2018).An ecological response to the Eocene/Oligocene transition revealed by the delta(13)G(TOC) record, Lanzhou Basin, NE Tibetan Plateau.JOURNAL OF ASIAN EARTH SCIENCES,159.
MLA	Wu, Fuli,et al."An ecological response to the Eocene/Oligocene transition revealed by the delta(13)G(TOC) record, Lanzhou Basin, NE Tibetan Plateau".JOURNAL OF ASIAN EARTH SCIENCES 159(2018).