气候变化领域集成服务门户(CCPortal): Intense metamorphism-generated radiogenic Sr regulated Cenozoic water Sr isotope evolution on the NE Tibetan Plateau: A perspective on Qilian orogen denudation and Asian eolian transport

CCPortal

DOI	10.1130/B36525.1
	Intense metamorphism-generated radiogenic Sr regulated Cenozoic water Sr isotope evolution on the NE Tibetan Plateau: A perspective on Qilian orogen denudation and Asian eolian transport
	Yang, Yibo; Galy, Albert; Yang, Rongsheng; Liu, Yudong; Zhang, Weilin; Ruan, Xiaobai; Fang, Xiaomin; Jin, Zhangdong; Song, Bowen; Yan, Maodu; Zhang, Guibin; Cao, Kai; Shen, Tianyi; Mao, Ziqiang; Wu, Fuli; Zhang, Fei
发表日期	2023
ISSN	0016-7606
EISSN	1943-2674
起始页码	2237
结束页码	2254
卷号	135 期号:9-10
英文摘要	The India-Asia collision reactivated the early Paleozoic Qilian orogen with an intense metamorphic belt that promoted the release of metamorphism-generated radiogenic Sr into the drainage systems on the NE Tibetan Plateau. This metamorphic impact on the regional dissolved Sr cycle is well observed at the recent-modern scale, but its onset and evolutionary histories are unclear. We present the first basin-scale 52-5 Ma regional dissolved Sr isotopic record in water on the NE Tibetan Plateau by analyzing well-dated basin fluvial-lacustrine sediments in the Xining, Linxia, and Tianshui Basins. The Xining Basin displays an increase in basin water 87Sr/86Sr ratio and a decrease in the sediment eNd values at ca. 25 Ma. This Sr-Nd isotope-deduced provenance change coincides with the reorganization of drainage and erosion regimes that is suggested by an evident rise in the youngest peak and the lag time of detrital apatite fission-track ages from Cenozoic sedimentary basins surrounding the Qilian orogen. The Qilian-sourced eolian dust during ca. 9-8 Ma significantly elevated the river and lake water 87Sr/86Sr ratios in the down-wind Linxia and Tianshui Basins, which is consistent with the expansion of the Asian dust system. Our results suggest that large-scale denudation of the Qilian orogen in response to the India-Asia collision initiated in the late Oligocene. Given the remarkable hydrological impact of the Cenozoic reactivation of the Qilian orogen, our study highlights the potentially important role of continental collision-formed metamorphic belts in regulating past regional and even seawater Sr isotope evolution.
英文关键词	CHINESE LOESS PLATEAU; APATITE FISSION-TRACK; STRONTIUM ISOTOPES; HEXI CORRIDOR; QAIDAM BASIN; CONTINENTAL COLLISION; TECTONIC EVOLUTION; SR-87/SR-86 RECORD; EXHUMATION HISTORY; NORTHEASTERN TIBET
WOS研究方向	Geosciences, Multidisciplinary
WOS记录号	WOS:001101571800004
来源期刊	GEOLOGICAL SOCIETY OF AMERICA BULLETIN
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/283899
作者单位	Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS; Universite de Lorraine; Centre National de la Recherche Scientifique (CNRS); Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Chinese Academy of Sciences; Institute of Earth Environment, CAS; China University of Geosciences - Wuhan; Peking University; China University of Geosciences - Wuhan; China University of Geosciences - Wuhan; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
推荐引用方式 GB/T 7714	Yang, Yibo,Galy, Albert,Yang, Rongsheng,et al. Intense metamorphism-generated radiogenic Sr regulated Cenozoic water Sr isotope evolution on the NE Tibetan Plateau: A perspective on Qilian orogen denudation and Asian eolian transport[J]. 中国科学院青藏高原研究所,2023,135(9-10).
APA	Yang, Yibo.,Galy, Albert.,Yang, Rongsheng.,Liu, Yudong.,Zhang, Weilin.,...&Zhang, Fei.(2023).Intense metamorphism-generated radiogenic Sr regulated Cenozoic water Sr isotope evolution on the NE Tibetan Plateau: A perspective on Qilian orogen denudation and Asian eolian transport.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,135(9-10).
MLA	Yang, Yibo,et al."Intense metamorphism-generated radiogenic Sr regulated Cenozoic water Sr isotope evolution on the NE Tibetan Plateau: A perspective on Qilian orogen denudation and Asian eolian transport".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 135.9-10(2023).