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DOI	10.1016/j.chemgeo.2023.121728
	Gas geochemical evidence for the India-Asia lithospheric transition boundary near the Karakorum fault in western Tibet
	Bai, Yunfei; Shi, Zheming; Zhou, Xiaocheng; Wu, Chen; Wang, Guangcai; He, Miao; Li, Jingchao; Dong, Jinyuan; Tian, Jiao; Yan, Yucong; Liu, Fengli; Ouyang, Shupei; Yao, Bingyu; Wang, Yuwen; Zeng, Zhaojun; Kong, Xiangjun
发表日期	2023
ISSN	0009-2541
EISSN	1872-6836
卷号	639
英文摘要	The lithospheric structure of the Tibetan Plateau plays a key role in explaining the underlying plateau formation mechanism(s) and growth history. Although many studies have focused on the Moho discontinuity, lithosphere boundary, and lithospheric structure of central and eastern Tibet, there are few corresponding constraints for western Tibet. In this contribution, we systematically investigated the lithosphere in western Tibet by analyzing the He and C isotopes of seven hydrothermal spring systems along the southeastern segment of the Karakorum fault. We found a high Rc/Ra ratio (1.298) for springs along the Karakorum fault, suggesting that the fault plays a key role as a lithospheric-scale conduit for fluid uplift after mantle degassing. In addition, we identified two different origins of the gases at thermal springs, which may reflect two distinct mantle sources. We infer that the locations of these springs reflect the boundary between the Indian and Asian mantles, which is consistent with the geophysics-based interpretations of a mantle suture along the Karakorum fault. Our work confirms the boundary between the Indian and Asian mantle, which provides geochemical support to the model of the subduction of Indian lithosphere.
关键词	Karakorum fault Rc/Ra C isotopes Thermal springs Mantle suture
英文关键词	YARLUNG ZANGBO SUTURE; CARBON-ISOTOPE; VOLATILE FLUXES; SOUTHERN TIBET; HYDROTHERMAL FLUIDS; GEOTHERMAL SYSTEM; RADIOGENIC HELIUM; MANTLE WEDGE; BENEATH; ZONE
WOS研究方向	Geochemistry & Geophysics
WOS记录号	WOS:001088359800001
来源期刊	CHEMICAL GEOLOGY
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/282903
作者单位	China University of Geosciences - Beijing; Ministry of Natural Resources of the People's Republic of China; China Earthquake Administration; Institute of Earthquake Forecasting, CEA; Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS; China University of Geosciences - Beijing
推荐引用方式 GB/T 7714	Bai, Yunfei,Shi, Zheming,Zhou, Xiaocheng,et al. Gas geochemical evidence for the India-Asia lithospheric transition boundary near the Karakorum fault in western Tibet[J]. 中国科学院青藏高原研究所,2023,639.
APA	Bai, Yunfei.,Shi, Zheming.,Zhou, Xiaocheng.,Wu, Chen.,Wang, Guangcai.,...&Kong, Xiangjun.(2023).Gas geochemical evidence for the India-Asia lithospheric transition boundary near the Karakorum fault in western Tibet.CHEMICAL GEOLOGY,639.
MLA	Bai, Yunfei,et al."Gas geochemical evidence for the India-Asia lithospheric transition boundary near the Karakorum fault in western Tibet".CHEMICAL GEOLOGY 639(2023).