Mid-Miocene Lake Level Fluctuations in the Lunpola Basin, Central Tibetan Plateau

doi:10.3389/feart.2021.808266

	Mid-Miocene Lake Level Fluctuations in the Lunpola Basin, Central Tibetan Plateau
	Liang, Yu 4; Quan, Cheng 3; Li, Yongxiang 2; Liu, Weiguo 1; Liu, Zhonghui 1,4
刊名	FRONTIERS IN EARTH SCIENCE
	2021-12-21
卷号	9 页码:9
关键词	central Tibet mid-Miocene paleolake hydrological evolution n-alkanes
DOI	10.3389/feart.2021.808266
通讯作者	Liu, Zhonghui(zhliu@hku.hk)
英文摘要	Knowledge of paleolake evolution is highly important for understanding the past hydroclimate regime on the Tibetan Plateau and associated forcing mechanisms. However, the hydrological history of paleolakes on the central plateau, the core region of the plateau, remains largely inconclusive. Here we present new biomarker records from lacustrine deposits of the Lunpori section in the Lunpola Basin to reconstruct detailed lake-level fluctuations during the mid-Miocene. A set of n-alkane indexes, including the proportion of aquatic macrophytes (P-aq), average chain length and carbon preference index as well as the content of n-alkanes, vary substantially and consistently throughout the studied interval. Our results altogether show relatively low lake level at similar to 16.3-15.5 Ma and high lake level before and after the interval, which is in line with the lithological observations in the section. Further comparison with existing regional and global temperature records suggests that lake level fluctuations can be largely linked to global climatic conditions during the mid-Miocene, with lake expansion during relatively warm periods and vice versa. Therefore, we infer that global climatic changes might have controlled the lake-level fluctuations in this region during the mid-Miocene, whereas the tectonic uplift likely played a subordinate role on this timescale.
WOS关键词	QAIDAM BASIN ; SUBMERGED PLANTS ; ASIAN MONSOON ; TARIM BASIN ; CLIMATE ; WATER ; EVOLUTION ; PALEOELEVATION ; ARIDIFICATION ; CONSTRAINTS
WOS研究方向	Geology
语种	英语
出版者	FRONTIERS MEDIA SA
WOS记录号	WOS:000739064600001
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/17368]
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.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Peoples R China 2.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing, Peoples R China 3.Changan Univ, Sch Earth Sci & Resources, Xian, Peoples R China 4.Univ Hong Kong, Dept Earth Sci, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Liang, Yu,Quan, Cheng,Li, Yongxiang,et al. Mid-Miocene Lake Level Fluctuations in the Lunpola Basin, Central Tibetan Plateau[J]. FRONTIERS IN EARTH SCIENCE,2021,9:9.
APA	Liang, Yu,Quan, Cheng,Li, Yongxiang,Liu, Weiguo,&Liu, Zhonghui.(2021).Mid-Miocene Lake Level Fluctuations in the Lunpola Basin, Central Tibetan Plateau.FRONTIERS IN EARTH SCIENCE,9,9.
MLA	Liang, Yu,et al."Mid-Miocene Lake Level Fluctuations in the Lunpola Basin, Central Tibetan Plateau".FRONTIERS IN EARTH SCIENCE 9(2021):9.