干旱区生态环境知识资源中心(Arid): Middle Eocene Paleoenvironmental Reconstruction in the Gonjo Basin, Eastern Tibetan Plateau: Evidence From Palynological and Evaporite Records

Arid

DOI	10.3389/feart.2022.818418
	Middle Eocene Paleoenvironmental Reconstruction in the Gonjo Basin, Eastern Tibetan Plateau: Evidence From Palynological and Evaporite Records
	Wang, Licheng; Yuan, Qin; Shen, Lijian; Ding, Lin
通讯作者	Wang, LC (corresponding author)，Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing, Peoples R China. ; Yuan, Q (corresponding author)，Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining, Peoples R China.
来源期刊	FRONTIERS IN EARTH SCIENCE
EISSN	2296-6463
出版年	2022
卷号	10
英文摘要	The early uplift of the Tibetan Plateau (TP) had a profound influence on the paleoenvironment and paleoclimate. However, we still have little information about the link between the paleoclimatic changes and flora ecosystem caused by the uplift. The Eocene fluvial-lacustrine sequences in the Gonjo Basin, eastern TP, provide excellent archives of the paleoecological and paleoclimatic responses to the surface uplift of the TP. In this study, we investigated a section of the middle Eocene Ranmugou Formation (47.8->44 Ma) and used the sporomorphs assemblages, sedimentology, and geochemistry of the evaporites to reconstruct the paleoclimate and paleovegetation. The palynological assemblages and coexistence analysis reveal that the middle Eocene ecosystem in the Gonjo Basin was dominated by warm and humid temperate deciduous broad-leaved forests. The Sr-87/Sr-86 ratios (0.709942-0.710062) of all of the gypsum samples are higher than those of contemporaneous seawater, while the delta S-34 values (10.3-11.0%) are much lower, indicating a lacustrine environment. Combined with published palynological and paleoelevation data for eastern Tibetan lacustrine basins, we infer that the paleoenvironment changed from warm and humid deciduous broad-leaved forests during 47.8->44 Ma, to cool and arid temperate forest during 44-40 Ma in the Gonjo Basin, and to arid and cool steppe-desert vegetation in the late Eocene Nangqian Basin. The changes in the paleoclimate and vegetation were primarily driven by the surface uplift of the Central Watershed Mountain, the high topography of which blocked the moisture from the Asian Eocene monsoon.
英文关键词	palynology vegetation paleoclimate paleoenvironment Gonjo Basin Tibetan plateau
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000760793000001
WOS关键词	HOH XIL BASIN ; COEXISTENCE APPROACH ; MONSOON PREVALENCE ; CLIMATE-CHANGE ; XINING BASIN ; POLLEN ; UPLIFT ; CHINA ; ARIDIFICATION ; STRATIGRAPHY
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376317
作者单位	[Wang, Licheng; Ding, Lin] Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing, Peoples R China; [Yuan, Qin] Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining, Peoples R China; [Shen, Lijian] Chinese Acad Geol Sci, Inst Mineral Resources, MNR Key Lab Metallogeny & Mineral Assessment, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wang, Licheng,Yuan, Qin,Shen, Lijian,et al. Middle Eocene Paleoenvironmental Reconstruction in the Gonjo Basin, Eastern Tibetan Plateau: Evidence From Palynological and Evaporite Records[J],2022,10.
APA	Wang, Licheng,Yuan, Qin,Shen, Lijian,&Ding, Lin.(2022).Middle Eocene Paleoenvironmental Reconstruction in the Gonjo Basin, Eastern Tibetan Plateau: Evidence From Palynological and Evaporite Records.FRONTIERS IN EARTH SCIENCE,10.
MLA	Wang, Licheng,et al."Middle Eocene Paleoenvironmental Reconstruction in the Gonjo Basin, Eastern Tibetan Plateau: Evidence From Palynological and Evaporite Records".FRONTIERS IN EARTH SCIENCE 10(2022).