An ecological response to the Eocene/Oligocene transition revealed by the delta(13)G(TOC) record, Lanzhou Basin, NE Tibetan Plateau
文献类型：期刊论文
| 作者 | Meng, QQ (Meng, Qingquan)5,6; Zhao, Y (Zhao, Yan)1,2,3; Wu, FL (Wu, Fuli)1,2; Fang, XM (Fang, Xiaomin)1,2,4 |
| 刊名 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 出版日期 | 2018-06-15 |
| 卷号 | 159期号:0页码:74-80 |
| 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 |
| ISSN号 | 1367-9120 |
| DOI | 10.1016/j.jseaes.2018.03.020 |
| 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. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000436213700008 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.itpcas.ac.cn/handle/131C11/8627]  |
| 专题 | 青藏高原研究所_图书馆 |
| 作者单位 | 1.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. |
| 推荐引用方式 GB/T 7714 | Meng, QQ ,Zhao, Y ,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[J]. JOURNAL OF ASIAN EARTH SCIENCES,2018,159(0):74-80. |
| APA | Meng, QQ ,Zhao, Y ,Wu, FL ,&Fang, XM .(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 | Meng, QQ ,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. |
入库方式： OAI收割
来源：青藏高原研究所
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