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题名: Cenozoic organic carbon isotope and pollen records from the Xining Basin, NE Tibetan Plateau, and their palaeoenvironmental significance
作者: Chi, YP; Fang, XM; Song, CH(宋春晖); Miao, YF; Teng, XH; Han, WX; Wu, FL; Yang, JW
收录类别: SCIE
出版日期: 2013-09-15
刊名: PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
卷号: 386, 页码:436-444
出版者: ELSEVIER
出版地: AMSTERDAM
英文摘要: Marine oxygen isotope records show that the Cenozoic global climate has undergone remarkable fundamental changes. However, how terrestrial ecosystems respond to these changes remains unclear. The Xining Basin on the northeastern Tibetan Plateau holds continuous fine fluvial-lacustrine sediments from the early Eocene to the early Miocene (between similar to 52 Ma and 17 Ma). This paper first presents total organic carbon isotope (delta C-13(TOC)) and pollen records from the Xiejia section in the Xining Basin, as indicators of the long-term terrestrial paleoecosystem and paleoclimate changes in the Asian interior of NW China. The delta C-13(TOC) record shows a long term persistently decreasing trend (from similar to-20 parts per thousand to -23.5 parts per thousand) superimposed with obvious cycles of five distinctive phases of heavier and lighter delta C-13(TOC) values, along with short pulses of especially low values occurring at similar to 32.5 Ma, 23 Ma, 21.5 Ma, and 18 Ma. These variations generally correlate with changes of gymnosperm content or the ratio of gymnosperm to angiosperm (G/A); i.e., heavier delta C-13(TOC) values correspond with higher gymnosperm content or higher G/A, as well as with global temperatures (for both long term trends and shorter term fluctuations). We propose that global temperatures might provide the major factor controlling the evolution of the gymnosperm content (and the G/A ratio) that determines the delta C-13(TOC) in the sediments. The East Asian monsoon may not have reached this region during the deposition of the sediments, or alternatively, its signals could not clearly be identified in these low resolution paleoecologic records. (C) 2013 Published by Elsevier B.V.
关键词: Total organic carbon isotope ; Pollen ; Xining Basin ; Cenozoic ; Global temperature ; Monsoon
作者部门: [Chi, Yunping ; Fang, Xiaomin ; Song, Chunhui ; Yang, Jiwei] Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Peoples R China ; [Chi, Yunping ; Fang, Xiaomin ; Song, Chunhui ; Yang, Jiwei] Lanzhou Univ, Key Lab Western Chinas Mineral Resources Gansu Pr, Lanzhou 730000, Peoples R China ; [Fang, Xiaomin ; Wu, Fuli] Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China ; [Chi, Yunping ; Fang, Xiaomin ; Song, Chunhui ; Teng, Xiaohua] Lanzhou Univ, MOE Key Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China ; [Chi, Yunping ; Fang, Xiaomin ; Song, Chunhui ; Teng, Xiaohua] Lanzhou Univ, Res Sch Arid Environm & Climate Change, Lanzhou 730000, Peoples R China ; [Miao, Yunfa] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Inst, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China ; [Han, Wenxia] Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Salt Lake Resources & Chem, Xining 810008, Peoples R China
通讯作者: Fang, XM (reprint author), Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China.
学科分类: Physical Geography; Geology; Paleontology
文章类型: Article
所属项目编号: Strategic Priority Research Program of the Chinese Academy of Sciences [XDB03020402] ; National Basic Research Program of China [2013CB956400, 2010CB833401] ; National Natural Science Foundation (NSFC) [41021001, 41272183, 41272128, 41172153]
所属项目名称: 国家自然科学基金项目 ; 国家重点基础研究发展计划以及国家重大科学研究计划(973计划)
项目资助者: NSFC ; MOST
语种: 英语
DOI: 10.1016/j.palaeo.2013.06.013
ISSN号: 0031-0182
WOS记录号: WOS:000324848800033
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/120634
Appears in Collections:地质科学与矿产资源学院_期刊论文

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Recommended Citation:
Chi, YP,Fang, XM,Song, CH,et al. Cenozoic organic carbon isotope and pollen records from the Xining Basin, NE Tibetan Plateau, and their palaeoenvironmental significance[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2013,386:436-444.
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