气候变化领域集成服务门户(CCPortal): Discovery of Permian-Triassic eclogite in northern Tibet establishes coeval subduction erosion along an ∼3000-km-long arc

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DOI	10.1130/G51223.1
	Discovery of Permian-Triassic eclogite in northern Tibet establishes coeval subduction erosion along an ∼3000-km-long arc
	Wu, Chen; Zuza, Andrew, V; Levy, Drew A.; Li, Jie; Ding, Lin
发表日期	2023
ISSN	0091-7613
EISSN	1943-2682
起始页码	833
结束页码	838
卷号	51 期号:9
英文摘要	Eclogite bodies exposed across Tibet record a history of subduction-collision events that preceded growth of the Tibetan Plateau. Deciphering the time-space patterns of eclogite generation improves our knowledge of the preconditions for Cenozoic orogeny in Tibet and broader eclogite formation and/or exhumation processes. Here we report the discovery of Permo-Triassic eclogite in northern Tibet. U-Pb zircon dating and thermobarometry suggest eclogite-facies metamorphism at ca. 262-240 Ma at peak pressures of similar to 2.5 GPa. Inherited zircons and geochemistry show the eclogite was derived from an upper-plate continental protolith, which must have experienced subduction erosion to transport the protolith mafic bodies to eclogite-forming conditions. The Dabie eclogites to the east experienced a similar history, and we interpret that these two coeval eclogite exposures formed by subduction erosion of the upper plate and deep trench burial along the same similar to 3000-km-long north-dipping Permo-Triassic subduction complex. We interpret the synchroneity of eclogitization along the strike length of the subduction zone to have been driven by accelerated plate convergence due to ca. 260 Ma Emeishan plume impingement.
英文关键词	CONTINENTAL-CRUST; ZIRCON U; UHP; EVOLUTION; GEOCHRONOLOGY; OROGEN; CHINA; HF; GEOCHEMISTRY; CONSTRAINTS
WOS研究方向	Geology
WOS记录号	WOS:001091244000007
来源期刊	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/283014
作者单位	Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS; Nevada System of Higher Education (NSHE); University of Nevada Reno; University of Texas System; University of Texas Austin; Chongqing University of Science & Technology
推荐引用方式 GB/T 7714	Wu, Chen,Zuza, Andrew, V,Levy, Drew A.,et al. Discovery of Permian-Triassic eclogite in northern Tibet establishes coeval subduction erosion along an ∼3000-km-long arc[J]. 中国科学院青藏高原研究所,2023,51(9).
APA	Wu, Chen,Zuza, Andrew, V,Levy, Drew A.,Li, Jie,&Ding, Lin.(2023).Discovery of Permian-Triassic eclogite in northern Tibet establishes coeval subduction erosion along an ∼3000-km-long arc.GEOLOGY,51(9).
MLA	Wu, Chen,et al."Discovery of Permian-Triassic eclogite in northern Tibet establishes coeval subduction erosion along an ∼3000-km-long arc".GEOLOGY 51.9(2023).