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An ecological response to the Eocene/Oligocene transition revealed by the delta(13)G(TOC) record, Lanzhou Basin, NE Tibetan Plateau
Wu, FL (Wu, Fuli)1,2; Zhao, Y (Zhao, Yan)1,2,3; Fang, XM (Fang, Xiaomin)1,2,4; Meng, QQ (Meng, Qingquan)5,6
Source PublicationJOURNAL OF ASIAN EARTH SCIENCES
2018-06-15
Volume159Issue:0Pages:74-80
DOI10.1016/j.jseaes.2018.03.020
AbstractThe 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.
WOS IDWOS:000436213700008
Language英语
Indexed BySCIE
KeywordCARBON 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
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
Cooperation Status国内
ISSN1367-9120
Department大陆碰撞与高原隆升重点实验室
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8627
Collection图书馆
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China;
2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China;
3.Linyi Univ, Inst Geol & Paleontol, Linyi 276000, Peoples R China;
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China;
5.Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Gansu, Peoples R China;
6.Lanzhou Univ, Key Lab Western Chinas Mineral Resources Gansu Pr, Lanzhou 730000, Gansu, Peoples R China.
Recommended Citation
GB/T 7714
Wu, FL ,Zhao, Y ,Fang, XM ,et al. An ecological response to the Eocene/Oligocene transition revealed by the delta(13)G(TOC) record, Lanzhou Basin, NE Tibetan Plateau[J]. JOURNAL OF ASIAN EARTH SCIENCES,2018,159(0):74-80.
APA Wu, FL ,Zhao, Y ,Fang, XM ,&Meng, QQ .(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(0),74-80.
MLA Wu, FL ,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 159.0(2018):74-80.
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