气候变化领域集成服务门户(CCPortal): Petrogenesis and metallogenic implications of Eocene-Oligocene magmatism in the Yulong porphyry copper belt, eastern Tibet: a review and analysis of geochronological, geochemical, and Sr-Nd-Pb-Hf isotopic data

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DOI	10.1139/cjes-2023-0087
	Petrogenesis and metallogenic implications of Eocene-Oligocene magmatism in the Yulong porphyry copper belt, eastern Tibet: a review and analysis of geochronological, geochemical, and Sr-Nd-Pb-Hf isotopic data
	Wang, Xiao-Qing; Ji, Feng-Bao
发表日期	2024
ISSN	0008-4077
EISSN	1480-3313
英文摘要	The Eocene Yulong porphyry copper belt (YPCB) in eastern Tibet contains more than 10 Mt of Cu metal, associated with subvolcanic to volcanic porphyry systems intruding Cenozoic sedimentary basins. Geochemical data analysis shows that all samples belonged to high-K calc-alkaline and shoshonite series with metaluminous-peraluminous characteristics, light rare earth elements and large ion lithophile elements enrichment, high field strength elements depletion, and share geochemical similarities to adakitic rocks. We have established a spatiotemporal evolution framework through geochronological data analysis, combined with calculated bulk zirconium saturation temperature, calculated crustal thickness and geophysical evidence. We identified three magmatic processes triggered by asthenospheric upwelling and thermal erosion of thickened crust: (1) ultrapotassic magma derived from metasomatized mantle; (2) coeval ultrapotassic melt that promoted the partial melting of eroded lower crust and the generation of high-K adakitic felsic melt; high-K and Mg# adakitic fertile magma was formed by interaction between the eroded sulfide-rich juvenile lower crust-derived melt and mantle peridotite; (3) high-K adakitic fertile magma was derived from sulfide-rich juvenile lower crust, triggered by injecting hydrous ultrapotassic magma into thinned lower crust. The difference between deposit size in the north/south section of Yulong belt may be caused by the temperature of magmatic source and the volume of coeval potassic-ultrapotassic magmatism. Our analysis of the YPCB suggests that magmatism after 175 Ma within Intermontane arc complex of the Canadian Cordillera has high potential for porphyry deposits.
关键词	data analysis adakitic rocks ultrapotassic magma partial melting metasomatized mantle lower crust
英文关键词	CU-MO DEPOSIT; ORE-BEARING PORPHYRIES; U-PB; CONTINENTAL-CRUST; HIGH-PRESSURE; CONSTRAINTS; SOUTHERN; ORIGIN; ROCKS; MINERALIZATION
WOS研究方向	Geosciences, Multidisciplinary
WOS记录号	WOS:001141892400001
来源期刊	CANADIAN JOURNAL OF EARTH SCIENCES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282863
作者单位	Chang'an University
推荐引用方式 GB/T 7714	Wang, Xiao-Qing,Ji, Feng-Bao. Petrogenesis and metallogenic implications of Eocene-Oligocene magmatism in the Yulong porphyry copper belt, eastern Tibet: a review and analysis of geochronological, geochemical, and Sr-Nd-Pb-Hf isotopic data[J],2024.
APA	Wang, Xiao-Qing,&Ji, Feng-Bao.(2024).Petrogenesis and metallogenic implications of Eocene-Oligocene magmatism in the Yulong porphyry copper belt, eastern Tibet: a review and analysis of geochronological, geochemical, and Sr-Nd-Pb-Hf isotopic data.CANADIAN JOURNAL OF EARTH SCIENCES.
MLA	Wang, Xiao-Qing,et al."Petrogenesis and metallogenic implications of Eocene-Oligocene magmatism in the Yulong porphyry copper belt, eastern Tibet: a review and analysis of geochronological, geochemical, and Sr-Nd-Pb-Hf isotopic data".CANADIAN JOURNAL OF EARTH SCIENCES (2024).