气候变化领域集成服务门户(CCPortal): U-Pb ages of Gongga Shan granite, western Sichuan and its implication to the tectonic evolutions of eastern Tibet

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DOI	10.3389/feart.2023.1176937
	U-Pb ages of Gongga Shan granite, western Sichuan and its implication to the tectonic evolutions of eastern Tibet
	Lee, Yuan-Hsi; Cook, Kristen L.; Tan, Xi-Bin; Chu, Mei-Fei; Chiu, Han-Yi; Li, Qui-Li; Shellnutt, J. Gregory; Xu, Xi-Wei
发表日期	2023
EISSN	2296-6463
卷号	11
英文摘要	The eastern margin of the Tibetan Plateau has given rise to much debate about mechanisms of plateau uplift and evolution and, in particular, the role of the lower crust in crustal thickening. Knowledge of the middle to lower crust conditions is critical for evaluating various models of crustal deformation, but data on crustal evolution through time are lacking. Here, we turn to the Gongga Shan granite, an intrusion along the Xianshuihe fault in easternmost Tibet that directly records local Cenozoic crustal conditions. We present 124 U-Pb samples from the Gongga Shan granite (GSG) that prove that the crust has been stepwise producing partial melt from 56 Ma to 4 Ma. According to the age distribution, the GSG can be separated into four major groups with ages of 4-10 Ma, 12-20 Ma, 25-40 Ma, and 43-56 Ma. Combining the timing information with geophysics and low-temperature thermochronology data, we suggest that events younger than 10 Ma may indicate the onset of recent crustal channel flow in the middle to lower crust. In contrast, the youngest 4 Ma ages indicate the ongoing partial melting of the middle crust. The 12-20 Ma events could be related to an earlier stage of crustal channel flow, consistent with the regional large-scale crustal channel flow in central Tibet.
关键词	Gongga Shan granite eastern Tibet magmatism U-Pb dating crustal channel flow
英文关键词	XIANSHUIHE FAULT; TRACE-ELEMENT; CRUSTAL FLOW; PLATEAU; ZIRCON; DEFORMATION; BENEATH; CONSTRAINTS; SUBDUCTION; ADJACENT
WOS研究方向	Geosciences, Multidisciplinary
WOS记录号	WOS:001055013500001
来源期刊	FRONTIERS IN EARTH SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282742
作者单位	National Chung Cheng University; National Taiwan University; Helmholtz Association; Helmholtz-Center Potsdam GFZ German Research Center for Geosciences; China Earthquake Administration; China Earthquake Administration; Chinese Academy of Sciences; Institute of Geology & Geophysics, CAS; National Taiwan Normal University; Communaute Universite Grenoble Alpes; Universite Grenoble Alpes (UGA); Centre National de la Recherche Scientifique (CNRS); Institut de Recherche pour le Developpement (IRD); Universite Gustave-Eiffel; Universite Savoie Mont Blanc
推荐引用方式 GB/T 7714	Lee, Yuan-Hsi,Cook, Kristen L.,Tan, Xi-Bin,et al. U-Pb ages of Gongga Shan granite, western Sichuan and its implication to the tectonic evolutions of eastern Tibet[J],2023,11.
APA	Lee, Yuan-Hsi.,Cook, Kristen L..,Tan, Xi-Bin.,Chu, Mei-Fei.,Chiu, Han-Yi.,...&Xu, Xi-Wei.(2023).U-Pb ages of Gongga Shan granite, western Sichuan and its implication to the tectonic evolutions of eastern Tibet.FRONTIERS IN EARTH SCIENCE,11.
MLA	Lee, Yuan-Hsi,et al."U-Pb ages of Gongga Shan granite, western Sichuan and its implication to the tectonic evolutions of eastern Tibet".FRONTIERS IN EARTH SCIENCE 11(2023).