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Highly Oxidized Magma and Fluid Evolution of Miocene Qulong Giant Porphyry Cu-Mo Deposit, Southern Tibet, China

文献类型：期刊论文

作者Xiao, Bo1,2; Qin, Kezhang1; Li, Guangming1; Li, Jinxiang1; Xia, Daixiang3; Chen, Lei1,2; Zhao, Junxing1,2
刊名RESOURCE GEOLOGY
出版日期2012
卷号62期号:1页码:4-18
关键词fluid inclusion Gangdese highly oxidized magmatic anhydrite Qulong porphyry Cu-Mo deposit Sulfur-rich magma
ISSN号1344-1698
DOI10.1111/j.1751-3928.2011.00177.x
文献子类Article
英文摘要The Miocene Qulong porphyry Cu-Mo deposit, which is located at the Gangdese orogenic belt of Southern Tibet, is the largest porphyry-type deposit in China, with confirmed Cu similar to 10 Mt and Mo similar to 0.5 Mt. It is spatially and temporally associated with multiphase granitic intrusions, which is accompanied by large-scale hydrothermal alteration and mineralization zones, including abundant hydrothermal anhydrite. In addition to hydrothermal anhydrite, magmatic anhydrite is present as inclusions in plagioclase, interstitial minerals between plagioclase and quartz, and phenocrysts in unaltered granodiorite porphyry, usually in association with clusters of sulfur-rich apatite in the Qulong deposit. These observations indicate that the Qulong magma-hydrothermal system was highly oxidized and sulfur-rich. Three main types of fluid inclusions are observed in the quartz phenocrysts and veins in the porphyry: (i) liquid-rich; (ii) polyphase high-salinity; and (iii) vapor-rich inclusions. Homogenization temperatures and salinities of all type inclusions decrease from the quartz phenocrysts in the porphyry to hydrothermal veins (A, B, D veins). Microthermometric study suggests copper-bearing sulfides precipitated at about 320400 degrees C in A and B veins. Fluid boiling is assumed for the early stage of mineralization, and these fluids may have been trapped at about 3560 Mpa at 460510 degrees C and 2842 Mpa at 400450 degrees C, corresponding to trapping depths of 1.42.4 km and 1.11.7 km, respectively.
WOS关键词ANHYDRITE-BEARING PUMICES ; EL-CHICHON TRACHYANDESITE ; EAST-WEST EXTENSION ; ORE-FORMING FLUID ; COPPER-DEPOSITS ; ARC MAGMAS ; MICROPHENOCRYSTIC APATITE ; SULFUR SPECIATION ; IGNEOUS ANHYDRITE ; WAVELENGTH SHIFTS
WOS研究方向Geology ; Mineralogy
语种英语
WOS记录号WOS:000298591200002
出版者WILEY-BLACKWELL
资助机构NSFC(40772066) ; NSFC(40772066) ; National Eleventh-Five years project(2006BA01A04) ; National Eleventh-Five years project(2006BA01A04) ; Chinese Geological Survey research project(20089932) ; Chinese Geological Survey research project(20089932) ; NSFC(40772066) ; NSFC(40772066) ; National Eleventh-Five years project(2006BA01A04) ; National Eleventh-Five years project(2006BA01A04) ; Chinese Geological Survey research project(20089932) ; Chinese Geological Survey research project(20089932) ; NSFC(40772066) ; NSFC(40772066) ; National Eleventh-Five years project(2006BA01A04) ; National Eleventh-Five years project(2006BA01A04) ; Chinese Geological Survey research project(20089932) ; Chinese Geological Survey research project(20089932) ; NSFC(40772066) ; NSFC(40772066) ; National Eleventh-Five years project(2006BA01A04) ; National Eleventh-Five years project(2006BA01A04) ; Chinese Geological Survey research project(20089932) ; Chinese Geological Survey research project(20089932)
源URL[http://ir.iggcas.ac.cn/handle/132A11/84620]  
专题中国科学院地质与地球物理研究所
通讯作者Qin, Kezhang
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100029, Peoples R China
3.Tibet Julong Copper Co Ltd, Lhasa, Peoples R China
推荐引用方式
GB/T 7714		 Xiao, Bo,Qin, Kezhang,Li, Guangming,et al. Highly Oxidized Magma and Fluid Evolution of Miocene Qulong Giant Porphyry Cu-Mo Deposit, Southern Tibet, China[J]. RESOURCE GEOLOGY,2012,62(1):4-18.
APA Xiao, Bo.,Qin, Kezhang.,Li, Guangming.,Li, Jinxiang.,Xia, Daixiang.,...&Zhao, Junxing.(2012).Highly Oxidized Magma and Fluid Evolution of Miocene Qulong Giant Porphyry Cu-Mo Deposit, Southern Tibet, China.RESOURCE GEOLOGY,62(1),4-18.
MLA Xiao, Bo,et al."Highly Oxidized Magma and Fluid Evolution of Miocene Qulong Giant Porphyry Cu-Mo Deposit, Southern Tibet, China".RESOURCE GEOLOGY 62.1(2012):4-18.

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来源：地质与地球物理研究所

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