Magmatic-hydrothermal evolution of the Cretaceous Duolong gold-rich porphyry copper deposit in the Bangongco metallogenic belt, Tibet: Evidence from U-Pb and Ar-40/Ar-39 geochronology

doi:10.1016/j.jseaes.2011.03.008

	Magmatic-hydrothermal evolution of the Cretaceous Duolong gold-rich porphyry copper deposit in the Bangongco metallogenic belt, Tibet: Evidence from U-Pb and Ar-40/Ar-39 geochronology
	Li, Jinxiang; Qin, Kezhang; Li, Guangming; Xiao, Bo; Zhao, Junxing; Chen, Lei
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2011-06-25
卷号	41 期号:6 页码:525-536
关键词	Gold-rich Porphyry Copper Deposit Zircon U-pb Geochronology Ar-40/ar-39 Geochronology Duo Long Bangongco Metallogenic Belt Tibet
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2011.03.008
文献子类	Article
英文摘要	The Duolong gold-rich porphyry copper deposit was recently discovered and represents a giant prospect (inferred resources of 4-5 Mt fine-Cu with a grade of 0.72% Cu; 30-50 t fine-gold with a grade of 0.23 g/t Au) in the Bangongco metallogenic belt, Tibet. Zircon SHRIMP and LA-ICP-MS U-Pb geochronology shows that the multiple porphyritic intrusions were emplaced during two episodes, the first at about 121 Ma (Bolong mineralized granodiorite porphyry (BMGP) and barren granodiorite porphyry (BGP)) and the second about 116 Ma (Duobuza mineralized granodiorite porphyry (DMGP)). Moreover, the basaltic andesites also have two episodes at about 118 Ma and 106 Ma, respectively. One andesite yields an U-Pb zircon age of 111.9 +/- 1.9 Ma, indicating it formed after the multiple granodiorite porphyries. By contrast, the Ar-40/Ar-39 age of 115.2 +/- 1.1 Ma (hydrothermal K-feldspar vein hosted in DMGP) reveals the close temporal relationship of ore-bearing potassic alteration to the emplacement of the DMGP. The sericite from quartz-sericite vein (hosted in DMGP) yields a Ar-40/Ar-39 age of 115.2 +/- 1.2 Ma. Therefore, the ore-forming magmatic-hydrothermal evolution probably persisted for 6 my. Additionally, the zircon U-Pb ages (106121 Ma) of the volcanic rocks and the porphyries suggest that the Neo-Tethys Ocean was still subducting northward during the Early Cretaceous. (C) 2011 Elsevier Ltd. All rights reserved.
WOS关键词	ORE-BEARING PORPHYRIES ; INDO-ASIAN COLLISION ; ELA-ICP-MS ; CU-AU ; FLUID INCLUSIONS ; HIGH-TEMPERATURE ; VOLCANIC-ROCKS ; TRACE-ELEMENT ; FORMING FLUID ; WESTERN TIBET
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000291773000004
资助机构	Natural Science Foundation(40902027 ; Natural Science Foundation(40902027 ; China Postdoctoral Science Foundation(20090450567) ; China Postdoctoral Science Foundation(20090450567) ; 40672068 ; 40672068 ; 40772066) ; 40772066) ; Natural Science Foundation(40902027 ; Natural Science Foundation(40902027 ; China Postdoctoral Science Foundation(20090450567) ; China Postdoctoral Science Foundation(20090450567) ; 40672068 ; 40672068 ; 40772066) ; 40772066) ; Natural Science Foundation(40902027 ; Natural Science Foundation(40902027 ; China Postdoctoral Science Foundation(20090450567) ; China Postdoctoral Science Foundation(20090450567) ; 40672068 ; 40672068 ; 40772066) ; 40772066) ; Natural Science Foundation(40902027 ; Natural Science Foundation(40902027 ; China Postdoctoral Science Foundation(20090450567) ; China Postdoctoral Science Foundation(20090450567) ; 40672068 ; 40672068 ; 40772066) ; 40772066)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/73950]
专题	中国科学院地质与地球物理研究所
通讯作者	Li, Jinxiang
作者单位	Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Li, Jinxiang,Qin, Kezhang,Li, Guangming,et al. Magmatic-hydrothermal evolution of the Cretaceous Duolong gold-rich porphyry copper deposit in the Bangongco metallogenic belt, Tibet: Evidence from U-Pb and Ar-40/Ar-39 geochronology[J]. JOURNAL OF ASIAN EARTH SCIENCES,2011,41(6):525-536.
APA	Li, Jinxiang,Qin, Kezhang,Li, Guangming,Xiao, Bo,Zhao, Junxing,&Chen, Lei.(2011).Magmatic-hydrothermal evolution of the Cretaceous Duolong gold-rich porphyry copper deposit in the Bangongco metallogenic belt, Tibet: Evidence from U-Pb and Ar-40/Ar-39 geochronology.JOURNAL OF ASIAN EARTH SCIENCES,41(6),525-536.
MLA	Li, Jinxiang,et al."Magmatic-hydrothermal evolution of the Cretaceous Duolong gold-rich porphyry copper deposit in the Bangongco metallogenic belt, Tibet: Evidence from U-Pb and Ar-40/Ar-39 geochronology".JOURNAL OF ASIAN EARTH SCIENCES 41.6(2011):525-536.