气候变化领域集成服务门户(CCPortal): Hydrothermal Degassing Through the Karakoram Fault, Western Tibet: Insights Into Active Deformation Driven by Continental Strike-Slip Faulting

CCPortal

DOI	10.1029/2023GL106647
	Hydrothermal Degassing Through the Karakoram Fault, Western Tibet: Insights Into Active Deformation Driven by Continental Strike-Slip Faulting
	Zhang, Maoliang; Xie, Xian-Gang; Liu, Wei; Liu, Yi; Wang, Linan; Sano, Yuji; Lang, Yun-Chao; Liu, Cong-Qiang; Xu, Sheng
发表日期	2024
ISSN	0094-8276
EISSN	1944-8007
卷号	51 期号:4
英文摘要	The Karakoram fault (KKF) is an important strike-slip boundary for accommodating deformation following the India-Asia collision. However, whether the deformation is confined to the crust or whether it extends into the mantle remains highly debated. Here, we show that the KKF is overwhelmingly dominated by crustal degassing related to a He-4- and CO2-rich fluid reservoir (for example, He contents up to similar to 1.0-1.6 vol.%; He-3/He-4 = 0.027 +/- 0.013 R-A (1 sigma, n = 47); CO2/N-2 up to 3.7-57.8). Crustal-scale active deformation driven by strike-slip faulting could mobilize He-4 and CO2 from the fault zone rocks, which subsequently accumulate in the hydrothermal system. The KKF may have limited fluid connections to the mantle, and if any, the accumulated crustal fluids would efficiently dilute the uprising mantle fluids. In both cases, crustal deformation is evidently the first-order response to strike-slip faulting.
关键词	hydrothermal degassing Karakoram fault active deformation fault penetration depth He-CO2 systematics crustal degassing
英文关键词	SAN-ANDREAS FAULT; GEOTHERMAL GASES; VOLATILE FLUXES; CARBON-ISOTOPE; MANTLE FLUIDS; HELIUM; CRUSTAL; CO2; BENEATH; GEOCHEMISTRY
WOS研究方向	Geosciences, Multidisciplinary
WOS记录号	WOS:001163685200001
来源期刊	GEOPHYSICAL RESEARCH LETTERS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283494
作者单位	Tianjin University; Inner Mongolia University of Technology; Kochi University; University of Tokyo
推荐引用方式 GB/T 7714	Zhang, Maoliang,Xie, Xian-Gang,Liu, Wei,et al. Hydrothermal Degassing Through the Karakoram Fault, Western Tibet: Insights Into Active Deformation Driven by Continental Strike-Slip Faulting[J],2024,51(4).
APA	Zhang, Maoliang.,Xie, Xian-Gang.,Liu, Wei.,Liu, Yi.,Wang, Linan.,...&Xu, Sheng.(2024).Hydrothermal Degassing Through the Karakoram Fault, Western Tibet: Insights Into Active Deformation Driven by Continental Strike-Slip Faulting.GEOPHYSICAL RESEARCH LETTERS,51(4).
MLA	Zhang, Maoliang,et al."Hydrothermal Degassing Through the Karakoram Fault, Western Tibet: Insights Into Active Deformation Driven by Continental Strike-Slip Faulting".GEOPHYSICAL RESEARCH LETTERS 51.4(2024).