气候变化领域集成服务门户(CCPortal): Late Oligocene mountain building of the East Kunlun Shan in northeastern Tibet: Impact on the Cenozoic climate evolution in East Asia

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DOI	10.1016/j.gloplacha.2023.104114
	Late Oligocene mountain building of the East Kunlun Shan in northeastern Tibet: Impact on the Cenozoic climate evolution in East Asia
	Li, Chaopeng; Zheng, Dewen; Yu, Jingxing; Zhou, Renjie; Wang, Yizhou; Pang, Jianzhang; Wang, Ying; Hao, Yuqi; Xu, Yi-Gang
发表日期	2023
ISSN	0921-8181
EISSN	1872-6364
卷号	224
英文摘要	The role of northern Tibet in the Cenozoic climate evolution in East Asia remains controversial owing to a lack of constraints on the timing and pattern of mountain building. The East Kunlun Shan (EKLS) defines the geomorphological boundary of the northeastern Tibetan Plateau. We employed apatite (U-Th)/He thermochronology to analyze the exhumation history and pattern across the EKLS. In this study, we presented 28 mean apatite (U-Th)/He ages of bedrock, including seven previously published ages. Observed ages decrease with the decreased distance from the Kunlun strike-slip fault (34.0 to 20.4 Ma). Age-elevation relationships and thermal modeling demonstrate that exhumation rates in the EKLS and in restraining bends along the Kunlun strike-slip fault increased by a factor of 5-10, reaching similar to 200 m/Myr at similar to 26 Ma. These exhumation patterns support the idea that mountain building of the EKLS initiated in the Late Oligocene through northward tilting around the same time with strike-slip motion along the Kunlun fault. When combined with existing geological data, our findings suggest that the northern margin of high Tibet expanded from Tanggula Shan to EKLS-West Qinling during the Late Oligocene to Early Miocene. This period coincides with the initial accumulation of loess at the front of northern Tibet and the northward expansion of the monsoon region in adjacent East China. Therefore, our work supports the notion that the northward growth of Tibet may have played a role in the Late Oligocene-Early Miocene climate reorganization in East Asia.
关键词	Northeastern Tibet East Kunlun Shan Apatite(U-Th)/He Climate reorganization
英文关键词	QAIDAM BASIN; APATITE (U-TH)/HE; NORTHERN TIBET; TECTONIC EVOLUTION; PLATEAU MARGIN; LINXIA BASIN; CONSTRAINTS; GROWTH; UPLIFT; RANGE
WOS研究方向	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000983503300001
来源期刊	GLOBAL AND PLANETARY CHANGE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282614
作者单位	China Earthquake Administration; Chinese Academy of Sciences; Guangzhou Institute of Geochemistry, CAS; Chinese Academy of Sciences; University of Queensland
推荐引用方式 GB/T 7714	Li, Chaopeng,Zheng, Dewen,Yu, Jingxing,et al. Late Oligocene mountain building of the East Kunlun Shan in northeastern Tibet: Impact on the Cenozoic climate evolution in East Asia[J],2023,224.
APA	Li, Chaopeng.,Zheng, Dewen.,Yu, Jingxing.,Zhou, Renjie.,Wang, Yizhou.,...&Xu, Yi-Gang.(2023).Late Oligocene mountain building of the East Kunlun Shan in northeastern Tibet: Impact on the Cenozoic climate evolution in East Asia.GLOBAL AND PLANETARY CHANGE,224.
MLA	Li, Chaopeng,et al."Late Oligocene mountain building of the East Kunlun Shan in northeastern Tibet: Impact on the Cenozoic climate evolution in East Asia".GLOBAL AND PLANETARY CHANGE 224(2023).