Fluid inclusion characteristics and molybdenite Re-Os geochronology of the Qulong porphyry copper-molybdenum deposit, Tibet

doi:10.1007/s00126-016-0654-z

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Fluid inclusion characteristics and molybdenite Re-Os geochronology of the Qulong porphyry copper-molybdenum deposit, Tibet
	Li, Yang 1; Selby, David 1; Feely, Martin 2; Costanzo, Alessandra 2; Li, Xian-Hua 3
刊名	MINERALIUM DEPOSITA
	2017-02-01
卷号	52 期号:2 页码:137-158
关键词	Fluid Inclusion Molybdenite Re-os Qulong Porphyry Deposit Tibet
ISSN号	0026-4598
DOI	10.1007/s00126-016-0654-z
文献子类	Article
英文摘要	The Qulong porphyry copper and molybdenum deposit is located at the southwest margin of the Lhasa Terrane and in the eastern region of the Gangdese magmatic belt. It represents China's largest porphyry copper system, with similar to 2200 million tonnes of ore comprising 0.5 % Cu and 0.03 % Mo. The mineralization is associated with Miocene granodiorite, monzogranite and quartz-diorite units, which intruded into Jurassic volcanic units in a post-collisional (Indian-Asian) tectonic setting. Field observations and core logging demonstrate the alteration and mineralization at Qulong are akin to typical porphyry copper systems in subduction settings, which comprise similar magmatic-hydrothermal, potassic, propylitic and phyllic alteration assemblages. Molybdenite Re-Os geochronology confirms the relative timeframe defined by field observations and core logging and indicates that the bulk copper and molybdenum at Qulong were deposited within 350,000 years: between 16.10 +/- 0.06 [0.08] (without and with decay constant uncertainty) and 15.88 +/- 0.06 [0.08] Ma. This duration for mineralization is in direct contrast to a long-lived intrusive episode associated with mineralization based on previous zircon U-Pb data. Our fluid inclusion study indicates that the ore-forming fluid was oxidized and contained Na, K, Ca, Fe, Cu, Mo, Cl and S. The magmatic-hydrothermal transition occurred at similar to 425 A degrees C under lithostatic pressure, while potassic, propylitic and phyllic alteration occurred at hydrostatic pressure with temperature progressively decreasing from 425 to 280 A degrees C. The fluid inclusion data presented here suggests that there has been similar to 2.3 km of erosion at Qulong after its formation, and this erosion may be related to regional uplift of the Lhasa Terrane.
WOS关键词	CU-MO DEPOSIT ; U-PB AGE ; SOUTHERN TIBET ; ORE-DEPOSIT ; WORKING REFERENCE ; GANGDESE BELT ; AU DEPOSITS ; PAST DECADE ; TIME SCALES ; ZIRCON
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000393747600001
资助机构	Durham University ; China Scholarship Council ; Society of Economic Geologists ; International Association of Geochemistry ; Geological Society of London ; TOTAL endowment fund ; Durham University ; China Scholarship Council ; Society of Economic Geologists ; International Association of Geochemistry ; Geological Society of London ; TOTAL endowment fund ; Durham University ; China Scholarship Council ; Society of Economic Geologists ; International Association of Geochemistry ; Geological Society of London ; TOTAL endowment fund ; Durham University ; China Scholarship Council ; Society of Economic Geologists ; International Association of Geochemistry ; Geological Society of London ; TOTAL endowment fund
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53096]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者	Li, Yang
作者单位	1.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England 2.Natl Univ Ireland, Earth & Ocean Sci, Galway, Ireland 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 10029, Peoples R China
推荐引用方式 GB/T 7714	Li, Yang,Selby, David,Feely, Martin,et al. Fluid inclusion characteristics and molybdenite Re-Os geochronology of the Qulong porphyry copper-molybdenum deposit, Tibet[J]. MINERALIUM DEPOSITA,2017,52(2):137-158.
APA	Li, Yang,Selby, David,Feely, Martin,Costanzo, Alessandra,&Li, Xian-Hua.(2017).Fluid inclusion characteristics and molybdenite Re-Os geochronology of the Qulong porphyry copper-molybdenum deposit, Tibet.MINERALIUM DEPOSITA,52(2),137-158.
MLA	Li, Yang,et al."Fluid inclusion characteristics and molybdenite Re-Os geochronology of the Qulong porphyry copper-molybdenum deposit, Tibet".MINERALIUM DEPOSITA 52.2(2017):137-158.