气候变化领域集成服务门户(CCPortal): The early Eocene rise of the Gonjo Basin, SE Tibet: From low desert to high forest

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DOI	10.1016/j.epsl.2020.116312
	The early Eocene rise of the Gonjo Basin, SE Tibet: From low desert to high forest
	Xiong, Zhongyu; Ding, Lin; Spicer, Robert A.; Farnsworth, Alexander; Wang, Xu; Valdes, Paul J.; Su, Tao; Zhang, Qinghai; Zhang, Liyun; Cai, Fulong; Wang, Houqi; Li, Zhenyu; Song, Peiping; Guo, Xudong; Yue, Yahui
通讯作者	Ding, L (通讯作者)
发表日期	2020
ISSN	0012-821X
EISSN	1385-013X
卷号	543
英文摘要	Views differ on the uplift history of the SE Tibetan Plateau and causal geodynamic mechanisms, yet reliable age-constrained paleoaltimetry in this region could test growth models of the entire plateau. Here we apply carbonate clumped isotope thermometry to well-dated carbonate paleosols and marls in the Gonjo Basin, SE Tibet, to reveal the topographic evolution of the basin. The sedimentary ages of carbonates of the lower and upper Ranmugou Formation are constrained to 54-50 Ma and 44-40 Ma, respectively. The temperature derived from carbonate clumped isotope thermometry indicates the mean annual air temperature (MAAT) of the Gonjo Basin in the early Eocene was similar to 24 degrees C, which is consistent with the warm climate indicated by palm fossils. The MAAT of the basin in the middle Eocene was similar to 7 degrees C, 17 degrees C cooler than in the early Eocene. Carbonate clumped oxygen isotope thermometry-based paleoaltimetry shows the Gonjo Basin experienced a rapid uplift of 3.1 km, from similar to 0.7 km in the early Eocene to similar to 3.8 km in the middle Eocene. This rise explains the marked cooling. As a cause of this rapid rise, and the associated regional climate change transforming the landscape from desert to forest, we invoke crustal deformation and thickening induced by intracontinental subduction between the Lhasa and Qiangtang terranes that comprise the core of the Tibet. (C) 2020 Published by Elsevier B.V.
关键词	QIANGTANG TERRANE GEOLOGICAL EVOLUTION STABLE-ISOTOPES SOUTHERN TIBET HIGH-ELEVATION PLATEAU PALEOCENE CLIMATE PALEOALTIMETRY DELTA-O-18
英文关键词	SE Tibetan Plateau; clumped isotope; paleoelevation; Eocene; intracontinental subduction
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000540452500001
来源期刊	EARTH AND PLANETARY SCIENCE LETTERS
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/259998
推荐引用方式 GB/T 7714	Xiong, Zhongyu,Ding, Lin,Spicer, Robert A.,et al. The early Eocene rise of the Gonjo Basin, SE Tibet: From low desert to high forest[J]. 中国科学院青藏高原研究所,2020,543.
APA	Xiong, Zhongyu.,Ding, Lin.,Spicer, Robert A..,Farnsworth, Alexander.,Wang, Xu.,...&Yue, Yahui.(2020).The early Eocene rise of the Gonjo Basin, SE Tibet: From low desert to high forest.EARTH AND PLANETARY SCIENCE LETTERS,543.
MLA	Xiong, Zhongyu,et al."The early Eocene rise of the Gonjo Basin, SE Tibet: From low desert to high forest".EARTH AND PLANETARY SCIENCE LETTERS 543(2020).