干旱区生态环境知识资源中心(Arid): Palaeoenvironmental changes in Eocene Tibetan lake systems traced by geochemistry, sedimentology and palynofacies

Arid

DOI	10.1016/j.jseaes.2021.104778
	Palaeoenvironmental changes in Eocene Tibetan lake systems traced by geochemistry, sedimentology and palynofacies
	Yuan, Qin; Barbolini, Natasha; Ashworth, Luisa; Rydin, Catarina; Gao, Dong-Lin; Shan, Fa-Shou; Zhong, Xiao-Yong; Vajda, Vivi
通讯作者	Barbolini, N (corresponding author), Stockholm Univ, Dept Ecol Environm & Plant Sci, SE-10691 Stockholm, Sweden. ; Barbolini, N (corresponding author), Stockholm Univ, Bolin Ctr Climate Res, SE-10691 Stockholm, Sweden. ; Barbolini, N (corresponding author), Univ Amsterdam, Inst Biodivers & Ecosyst Dynam, Dept Ecosyst & Landscape Dynam, NL-1098 XH Amsterdam, Netherlands.
来源期刊	JOURNAL OF ASIAN EARTH SCIENCES
ISSN	1367-9120
EISSN	1878-5786
出版年	2021
卷号	214
英文摘要	Ancient lake deposits preserve detailed records of Cenozoic environmental changes, providing information on past climate, vegetation, precipitation and lake chemistry. This study focuses on palaeoenvironmental changes recorded in Eocene limnic environments across what is today the modern Tibetan Plateau. We describe a section dated as late Eocene (-38-37 Ma) and integrate these findings within a regional context of similarly-aged Tibetan lake deposits across the plateau. These sedimentary archives of environmental change indicate a period of late Eocene aridification and cooling in the lead-up to the greenhouse-icehouse transition, which remains poorly understood in Central Asia. We show, based on geochemical, sedimentological, and palynofacies analyses, that a large saline lake existed within a semi-arid to arid steppe environment in the Nangqian Basin, east-central Tibet. The saline lake experienced cyclic drying intervals with shifts to a playa lake / mudflat system. Evidence of increased aridity is recorded in the upper part of the section, including a thinning of gypsum beds, decrease in palynomorph abundance, and concurrent increase in wood debris and amorphous organic matter. This is consistent with late Eocene aridity in Asia, drying of the playa lake, and an impoverished desert-steppe vegetation. Grain size data and geochemistry indicate a stable provenance of sedimentary material, suggesting that tectonic activity did not dominate sedimentation in east-central Tibet during deposition of these successions. Rather, palaeoenvironmental changes across the Tibetan region were most probably controlled by global climate oscillations and retreat of the proto-Paratethys Sea during the late Eocene: knowledge that is relevant for ecological interpretations through the Cenozoic, Quaternary and to the present.
英文关键词	Grain size Steppe-desert Proto-Paratethys Sea Aridification Central Asia Cenozoic Quaternary
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000653086400002
WOS关键词	HOH XIL BASIN ; ENVIRONMENTAL-CHANGES ; LEVEL FLUCTUATIONS ; CENOZOIC SEDIMENTS ; ASIAN MONSOONS ; CLAY-MINERALS ; PLATEAU ; CLIMATE ; INDIA ; EVOLUTION
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/2XILL650/350732
作者单位	[Yuan, Qin; Gao, Dong-Lin; Shan, Fa-Shou] Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining, Peoples R China; [Yuan, Qin; Gao, Dong-Lin; Shan, Fa-Shou] Chinese Acad Sci, Qinghai Inst Salt Lakes, Qinghai Prov Key Lab Geol & Environm Salt Lakes, Xining, Peoples R China; [Yuan, Qin] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Yuan, Qin; Vajda, Vivi] Swedish Museum Nat Hist, Dept Palaeobiol, Stockholm, Sweden; [Barbolini, Natasha; Rydin, Catarina] Stockholm Univ, Dept Ecol Environm & Plant Sci, SE-10691 Stockholm, Sweden; [Barbolini, Natasha; Rydin, Catarina] Stockholm Univ, Bolin Ctr Climate Res, SE-10691 Stockholm, Sweden; [Barbolini, Natasha] Univ Amsterdam, Inst Biodivers & Ecosyst Dynam, Dept Ecosyst & Landscape Dynam, NL-1098 XH Amsterdam, Netherlands; [Ashworth, Luisa] Victoria Univ Wellington, Sch Geog Environm & Earth Sci, POB 600, Wellington 6012, New Zealand; [Rydin, Catarina] Royal Swedish Acad Sci, Bergius Fdn, Box 50005, SE-10405 St...
推荐引用方式 GB/T 7714	Yuan, Qin,Barbolini, Natasha,Ashworth, Luisa,et al. Palaeoenvironmental changes in Eocene Tibetan lake systems traced by geochemistry, sedimentology and palynofacies[J],2021,214.
APA	Yuan, Qin.,Barbolini, Natasha.,Ashworth, Luisa.,Rydin, Catarina.,Gao, Dong-Lin.,...&Vajda, Vivi.(2021).Palaeoenvironmental changes in Eocene Tibetan lake systems traced by geochemistry, sedimentology and palynofacies.JOURNAL OF ASIAN EARTH SCIENCES,214.
MLA	Yuan, Qin,et al."Palaeoenvironmental changes in Eocene Tibetan lake systems traced by geochemistry, sedimentology and palynofacies".JOURNAL OF ASIAN EARTH SCIENCES 214(2021).