气候变化领域集成服务门户(CCPortal): A Late-Eocene palynological record from the Hoh Xil Basin, northern Tibetan Plateau, and its implications for stratigraphic age, paleoclimate and paleoelevation

CCPortal

DOI	10.1016/j.gr.2015.01.007
	A Late-Eocene palynological record from the Hoh Xil Basin, northern Tibetan Plateau, and its implications for stratigraphic age, paleoclimate and paleoelevation
	Miao, Yunfa; Wu, Fuli; Chang, Hong; Fang, Xiaomin; Deng, Tao; Sun, Jimin; Jin, Chunsheng
通讯作者	Wu, FL (通讯作者)
发表日期	2016
ISSN	1342-937X
EISSN	1878-0571
起始页码	241
结束页码	252
卷号	31
英文摘要	The Hoh Xil Basin, lying in the central Tibetan Plateau, is key to understanding the Cenozoic tectonics, paleoelevation and paleoclimate changes that have occurred in the Tibetan Plateau since the collision of the Indian and Asian tectonic plates. However, the stratigraphic age and paleoelevation indicated by the sediments of the Hoh Xil Basin remain hotly debated. Here we report on one palynological record from the TTH-C section, extracted from the Yaxicuo Group (the stratigraphic unit between the Fenghuoshan and Wudaoliang groups), and analyze its implications for stratigraphic age, paleoclimate and paleoelevation in the Hoh Xil Basin. The record shows that palynological taxa are mainly dominated by xerophytic Ephedripites, Nitrariadites (Nitrariapollis) and Chenopodipollis, with few ferns and conifers. Rich morphologies correspond well with those in the Xia Ganchaigou Formation (Fm) of the Qaidam Basin to the north. Palynological percentages are well correlated with the middle member of the Xia Ganchaigou Fm in the Qaidam Basin as well as the lower member of the Mahalagou Fm in the Xining Basin to the northeast. The ages of the middle member of the Xia Ganchaigou and lower member of the Mahalagou Fms from these two basins are both identical to the Bartonian Stage (similar to 40-37 Ma) of the Late Eocene, according to their respective high-resolution magnetostratigraphic dating. This means that the age of the Yaxicuo Group at least covers the Bartonian Stage. Besides the Qaidam and Xining basins, the palynological assemblages of the TTH-C section are also similar to those of three other sites (the Jiuquan, Tu-ha and Hetao basins), indicating similarly arid climates dominated by a northwestern Chinese subtropical high, and a relatively low paleoelevation in the Hoh Xil Basin (mostly <2000 m a.s.l.) in the Late Eocene. (C) 2015 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
关键词	CENOZOIC TECTONIC EVOLUTION QAIDAM BASIN CLIMATE-CHANGE FENGHUOSHAN GROUP SURFACE POLLEN SOUTHERN TIBET LUNPOLA BASIN XINING BASIN CENTRAL-ASIA UPLIFT
英文关键词	Tibetan Plateau; Palynology; Late Eocene; Paleoclimate; Paleoelevation
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000371555100013
来源期刊	GONDWANA RESEARCH
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258742
推荐引用方式 GB/T 7714	Miao, Yunfa,Wu, Fuli,Chang, Hong,et al. A Late-Eocene palynological record from the Hoh Xil Basin, northern Tibetan Plateau, and its implications for stratigraphic age, paleoclimate and paleoelevation[J]. 中国科学院青藏高原研究所,2016,31.
APA	Miao, Yunfa.,Wu, Fuli.,Chang, Hong.,Fang, Xiaomin.,Deng, Tao.,...&Jin, Chunsheng.(2016).A Late-Eocene palynological record from the Hoh Xil Basin, northern Tibetan Plateau, and its implications for stratigraphic age, paleoclimate and paleoelevation.GONDWANA RESEARCH,31.
MLA	Miao, Yunfa,et al."A Late-Eocene palynological record from the Hoh Xil Basin, northern Tibetan Plateau, and its implications for stratigraphic age, paleoclimate and paleoelevation".GONDWANA RESEARCH 31(2016).