Evolution of the Miocene megalake in the western Qaidam Basin, northwestern China
文献类型：期刊论文
| 作者 | Liang, Yu1; Zhang, Bin2; Zhang, Yongshu3; Zhang, Yancheng1,4; Wang, Jun1,5; Liu, Zhonghui1,6 |
| 刊名 | PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
 |
| 出版日期 | 2021-06-01 |
| 卷号 | 571页码:8 |
| 关键词 | Hydrological changes Paleolake Tibetan Plateau Biomarkers |
| ISSN号 | 0031-0182 |
| DOI | 10.1016/j.palaeo.2021.110384 |
| 通讯作者 | Liu, Zhonghui(zhliu@hku.hk) |
| 英文摘要 | Thick Miocene lacustrine deposits have been identified across the Qaidam Basin on the northeast Tibetan Plateau, indicative of a relatively unified megalake then. How this megalake evolved at its final stage and associated controlling factors, e.g., global climate or tectonic uplift, remain largely elusive. Here we use the KC-1 well, drilled at the depo-center of the western Qaidam Basin, to investigate the megalake evolution over the mid- and late Miocene. A set of lipid biomarker indices, namely beta-carotane/n-C-36, gammacerane index, terrigenous/aquatic ratio and long-chain saturated ketone content, altogether indicate substantial lake level fluctuations, with lower lake level at the intervals of similar to 18-17 Ma, 13.5-11.5 Ma, 10.5-8 Ma and 7-6 Ma, and higher level at the intervals of similar to 7-13.5 Ma, 11.5-10.5 Ma, 8-7 Ma and 6-5 Ma, superimposed on the long-term shrinking trend. Direct comparison with existing regional and global temperature records suggests that such lake dynamics was largely associated with global climatic conditions, i.e., shrinking under relatively cool conditions and vice versa, for both its long-term evolution and secondary fluctuations. It thus appears that global climatic conditions had controlled the megalake status during the mid- and late Miocene, whereas tectonic activities then might have also contributed to its long-term gradual demise. |
| WOS关键词 | TIBETAN PLATEAU IMPLICATIONS ; CLIMATE-CHANGE ; CENTRAL-ASIA ; ISOTOPIC CONSTRAINTS ; TECTONIC EVOLUTION ; TARIM BASIN ; ARIDIFICATION ; UPLIFT ; RECORD ; BIOMARKER |
| 资助项目 | Chinese Academy of Sciences[XDB40000000] ; Hong Kong Research Grants Council[17305019] ; HKU Postgraduate Studentship |
| WOS研究方向 | Physical Geography ; Geology ; Paleontology |
| 语种 | 英语 |
| WOS记录号 | WOS:000643685200016 |
| 出版者 | ELSEVIER |
| 资助机构 | Chinese Academy of Sciences ; Hong Kong Research Grants Council ; HKU Postgraduate Studentship |
| 源URL | [http://ir.ieecas.cn/handle/361006/16450]  |
| 专题 | 地球环境研究所_加速器质谱中心 |
| 通讯作者 | Liu, Zhonghui |
| 作者单位 | 1.Univ Hong Kong, Dept Earth Sci, Hong Kong, Peoples R China 2.China Natl Petr Corp, Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China 3.China Natl Petr Corp, Qinghai Oilfield, Dunhuang 736202, Peoples R China 4.Sun Yat Sen Univ, Sch Marine Sci, Zhuhai 519000, Peoples R China 5.Yunnan Univ, Sch Earth Sci, Kunming 650500, Yunnan, Peoples R China 6.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liang, Yu,Zhang, Bin,Zhang, Yongshu,et al. Evolution of the Miocene megalake in the western Qaidam Basin, northwestern China[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2021,571:8. |
| APA | Liang, Yu,Zhang, Bin,Zhang, Yongshu,Zhang, Yancheng,Wang, Jun,&Liu, Zhonghui.(2021).Evolution of the Miocene megalake in the western Qaidam Basin, northwestern China.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,571,8. |
| MLA | Liang, Yu,et al."Evolution of the Miocene megalake in the western Qaidam Basin, northwestern China".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 571(2021):8. |
入库方式： OAI收割
来源：地球环境研究所
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