Zircon geochronology and Hf isotope geochemistry of the granitoids in   the Yangshan gold field, western Qinling, China: implications for   petrogenesis, ore genesis and tectonic setting

doi:10.1002/gj.2589

CORC > 北京大学 > 地球与空间科学学院

	Zircon geochronology and Hf isotope geochemistry of the granitoids in the Yangshan gold field, western Qinling, China: implications for petrogenesis, ore genesis and tectonic setting
	Mao, Shidong ; Chen, Yan-Jing ; Zhou, Zhenju ; Lu, Yinghuai ; Guo, Junhua ; Qin, Yan ; Yu, Jinyuan
刊名	geological journal
	2014
关键词	zircon geochronology Hf isotope fore-arc S-type granite Yangshan giant gold deposit Qinling Orogen China U-PB AGE ULTRAHIGH-TEMPERATURE METAMORPHISM ZHAIWA MO-CU NORTH CHINA SOUTH CHINA GANSU PROVINCE COLUMBIA SUPERCONTINENT DYNAMIC SIGNIFICANCE FLUID INCLUSIONS OROGENIC BELT
DOI	10.1002/gj.2589
英文摘要	The Yangshan gold deposit, Gansu Province, is the largest gold deposit in China and the best representative of the western Qinling gold province. Granite dykes can be observed in the orefield, of which some are spatially associated with the gold orebodies. Gold mineralization was debated between magmatic hydrothermal and metamorphic hydrothermal models in previous studies due to a shortage of precise isotopic ages of the granite dykes in the orefield. In this contribution, we report in-situ zircon LA-ICP-MS U-Pb ages combined with Hf isotope and REE data. The age of granite dykes is constrained to be 220.2 +/- 3.1 Ma, coeval with the regional development of Triassic granitoids, which resulted from the northward subduction of the Mian-Lue oceanic plate. The epsilon Hf(t) values of inherited and new zircon grains from the granite dykes show that the granite dykes have a complex source dominated by sediments which were sourced from the North China Craton, Yangtze Craton and Qinling Orogen, and accumulated in a fore-arc setting. The granite dykes were derived from partial melting of the fore-arc sediment prism induced by the fluids sourced from metamorphic devolatilizaiton of the underthrust Mian-Lue oceanic plate. The Yangshan gold deposit was formed at about 190 Ma, some 30 Myr later than the intrusion of the granite dykes, ruling out the possibility that gold mineralization was caused by Triassic granitic magmatism. The Yangshan gold deposit is a transitional system between Carlin-and orogenic-types that resulted from continental collision orogeny, metallogeny and fluid flow. Copyright (C) 2014 John Wiley & Sons, Ltd.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000343983700003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Geosciences, Multidisciplinary; SCI(E); 8; ARTICLE; yjchen@pku.edu.cn; 4-5,SI; 359-382; 49
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/231009]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Mao, Shidong,Chen, Yan-Jing,Zhou, Zhenju,et al. Zircon geochronology and Hf isotope geochemistry of the granitoids in the Yangshan gold field, western Qinling, China: implications for petrogenesis, ore genesis and tectonic setting[J]. geological journal,2014.
APA	Mao, Shidong.,Chen, Yan-Jing.,Zhou, Zhenju.,Lu, Yinghuai.,Guo, Junhua.,...&Yu, Jinyuan.(2014).Zircon geochronology and Hf isotope geochemistry of the granitoids in the Yangshan gold field, western Qinling, China: implications for petrogenesis, ore genesis and tectonic setting.geological journal.
MLA	Mao, Shidong,et al."Zircon geochronology and Hf isotope geochemistry of the granitoids in the Yangshan gold field, western Qinling, China: implications for petrogenesis, ore genesis and tectonic setting".geological journal (2014).