气候变化领域集成服务门户(CCPortal): Petrogenesis and thermal history of the Yulong porphyry copper deposit, Eastern Tibet: insights from U-Pb and U-Th/He dating, and zircon Hf isotope and trace element analysis

CCPortal

DOI	10.1007/s00710-012-0211-0
	Petrogenesis and thermal history of the Yulong porphyry copper deposit, Eastern Tibet: insights from U-Pb and U-Th/He dating, and zircon Hf isotope and trace element analysis
	Li, Jinxiang; Qin, Kezhang; Li, Guangming; Cao, Mingjian; Xiao, Bo; Chen, Lei; Zhao, Junxing; Evans, Noreen J.; McInnes, Brent I. A.
通讯作者	Li, JX (通讯作者)
发表日期	2012
ISSN	0930-0708
EISSN	1438-1168
起始页码	201
结束页码	221
卷号	105 期号:3-4
英文摘要	The Yulong porphyry copper deposit (6.5 Mt at 0.46 % Cu) in eastern Tibet was formed in a post-collisional setting. New zircon U-Pb and U-Th/He ages, apatite U-Th/He ages and in-situ zircon Hf isotopic and trace element data for the Yulong ore-bearing adakitic porphyries elucidate the thermal history and petrogenesis of the deposit. Zircon U-Pb ages range from from 41.2 Ma to 40.7 Ma, indicating an Eocene formation age. Combined with the zircon U-Th/He age of 37.5 +/- 1.2 Ma, results suggest that magmatic-hydrothermal evolution lasted up to 5 m.y. The apatite U-Th/He age of 33.4 +/- 0.9 Ma reflects Yulong deposit exhumation during the similar to 33-30 Ma Tibetan uplift. Moreover, the high epsilon Hf(t)-values (7.1 similar to 12.2) zircon yield the highest I REE pound content, higher Y/Hf, lower Ce/Ce* and higher Th/U ratios compared to inherited zircon or magmatic zircon suggesting that the high epsilon Hf(t) zircon crystallized from another magma, and that magma mixing probably contributed to the adakitic porphyries at Yulong. In addition, inherited and magmatic zircon with the lowest epsilon Hf(t) values (-20.6 similar to -4.4) suggest crustal contamination. The positive zircon epsilon Hf(t) values indicate a source in the juvenile arc lower crust. Significantly, the juvenile arc lower crust inherited arc magma characteristics (abundant F, Cl, Cu and high oxidation state), which are now found in the porphyry Cu-Mo deposits.
关键词	ORE-BEARING PORPHYRIES CU-AU LU-HF CONTINENTAL COLLISION HIGH-TEMPERATURE SOUTHERN TIBET VOLCANIC-ROCKS FORMING FLUID GOLD DEPOSIT ICP-MS
语种	英语
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
WOS类目	Geochemistry & Geophysics ; Mineralogy
WOS记录号	WOS:000305889200008
来源期刊	MINERALOGY AND PETROLOGY
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/258075
推荐引用方式 GB/T 7714	Li, Jinxiang,Qin, Kezhang,Li, Guangming,et al. Petrogenesis and thermal history of the Yulong porphyry copper deposit, Eastern Tibet: insights from U-Pb and U-Th/He dating, and zircon Hf isotope and trace element analysis[J]. 中国科学院青藏高原研究所,2012,105(3-4).
APA	Li, Jinxiang.,Qin, Kezhang.,Li, Guangming.,Cao, Mingjian.,Xiao, Bo.,...&McInnes, Brent I. A..(2012).Petrogenesis and thermal history of the Yulong porphyry copper deposit, Eastern Tibet: insights from U-Pb and U-Th/He dating, and zircon Hf isotope and trace element analysis.MINERALOGY AND PETROLOGY,105(3-4).
MLA	Li, Jinxiang,et al."Petrogenesis and thermal history of the Yulong porphyry copper deposit, Eastern Tibet: insights from U-Pb and U-Th/He dating, and zircon Hf isotope and trace element analysis".MINERALOGY AND PETROLOGY 105.3-4(2012).