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Fluid and melt inclusion study on mineralized and barren porphyries, Jinshajiang-Red River alkali-rich intrusive belt, and significance to metallogenesis
Die Wang;  Xianwu Bi;  Huanzhang Lu;  Ruizhong Hu;  Xinsong Wang;  Leiluo Xu
2018
Source PublicationJournal of Geochemical Exploration
Volume184Issue:Part APages:28-39
Other Abstract

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Alkali-rich Cu (Au, Mo) deposits are of increasing economic significance and are an attractive exploration target. They include some of the world's highest grade and largest porphyry related gold resources as well as some of the largest gold accumulations in epithermal settings. The Jinshajiang–Red River alkali-rich intrusive belt, with many porphyry Cu (Au, Mo) deposits, is a representative magmatic belt associated with mineralization. The Jinshajiang–Red River alkali-rich intrusive belt contains several Cu (Au, Mo) mineralized alkali-rich porphyry rocks including the Yulong quartz monzonite porphyry, the Machangqing granite porphyry, the Tongchang quartz syenite porphyry, and the Beiya quartz syenite porphyry. Additionally, there are also some barren alkali-rich porphyry rocks in the belt, such as the Yanshuiqing quartz syenite porphyry. Fluid inclusion petrography and microthermometry on those porphyry rocks are carried out in detail. The results show that the fluid inclusion assemblages in ore-bearing and barren porphyries are distinct: inclusions from barren porphyry are dominated by primary melt inclusions, and contain rare or no fluid inclusions, whereas inclusions from ore-bearing porphyries are dominated by fluid inclusions, and contain rare melt inclusions. Furthermore, halite, sylvite, calcite daughter minerals and an opaque phase in fluid inclusions from ore-bearing rocks are common, but rare in fluid inclusions from barren rocks. The results suggests that the evolution of ore forming fluids especially the halite, sylvite, calcite and opaque daughter minerals bearing fluid inclusions of quartz phenocrysts could be used to judge the degree of metasomatism and mineralization of a porphyry system.

KeywordFluid/melt Inclusion Phenocryst Mineral Porphyry Cu (Au, Mo) Deposit Jinshajiang–red River Alkali-rich Intrusive Belt
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8006
Collection矿床地球化学国家重点实验室
Affiliation1.State Key Laboratory of Ore Deposits Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
2.Faculty of Land and Resources Engineering, Kunming University of Science and Technology, Kunming 650031, China
3.University of Quebec, Chicoutimi, Quebec G7H 2B1, Canada
Recommended Citation
GB/T 7714
Die Wang;Xianwu Bi;Huanzhang Lu;Ruizhong Hu;Xinsong Wang;Leiluo Xu. Fluid and melt inclusion study on mineralized and barren porphyries, Jinshajiang-Red River alkali-rich intrusive belt, and significance to metallogenesis[J]. Journal of Geochemical Exploration,2018,184(Part A):28-39.
APA Die Wang;Xianwu Bi;Huanzhang Lu;Ruizhong Hu;Xinsong Wang;Leiluo Xu.(2018).Fluid and melt inclusion study on mineralized and barren porphyries, Jinshajiang-Red River alkali-rich intrusive belt, and significance to metallogenesis.Journal of Geochemical Exploration,184(Part A),28-39.
MLA Die Wang;Xianwu Bi;Huanzhang Lu;Ruizhong Hu;Xinsong Wang;Leiluo Xu."Fluid and melt inclusion study on mineralized and barren porphyries, Jinshajiang-Red River alkali-rich intrusive belt, and significance to metallogenesis".Journal of Geochemical Exploration 184.Part A(2018):28-39.
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