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- W2392422904 abstract "The Xuefeng Uplift Belt in western Hunan is an important Au-Sb(-W) mineralization belt in South China.The Woxi deposit,as the largest deposit with a unique element association of Au-Sb-W in this region,has attracted attentions of numerous geologists.Researches on ore genesis,fluid inclusion,stable isotope,ore fabric,ore-controlling tectonic and mineralogy have been well conducted in this deposit; however,wolframite in this well studied deposit receives less attention.In this study,geological characteristics of wolframite in the Woxi deposit are described in details,and its trace element concentrations are analyzed by ICP-MS in order to constrain its ore genesis,the nature of the ore-forming fluid and the source of the ore-forming materials.In the Woxi deposit,most wolframite-bearing ore veins occur as bedding quartz veins,whereas the others appear as joint veins of various types indicating there exist multi-stage tungsten mineralization events in this area.Besides,the ore commonly exhibits open-space filling structure and the wolframite is frequently intergrown with carbonate and sulfide in this deposit.The results show that the REE concentrations of wolframites from the Woxi deposit(1.62–4.58 μg/g) are distinctly lower than those of wolframites from granite-related tungsten deposits in the Nanling Range.The REE geochemistry of the Woxi wolframite is characterized by HREE enrichment,Eu-,Sm-,Gd- and Tb-anomalies,as well as a peculiar composite M- and W-type tetrad effect.All of these features are probably controlled by the oxygen fugacity and the stabilities of complexing agent in the ore-forming fluid.Moreover,the Y/Ho ratios( 28) of wolframites from the Woxi deposit reveal REE and Y speciation is dominated by(bi)carbonate-complexes in wolframite-precipitating fluid.In addition,the content of Sc of wolframite from this deposit is high but the contents of Nb and Ta are low,which probably resulted from high pH,low Eh conditions during the crystallization of wolframite and from the leaching of the underlying older continental rocks by the hydrothermal fluid.Generally,the geological and geochemical characteristics of wolframite in the Woxi deposit,which are obviously different from that of those quartz vein-type wolframite deposits associated with granite intrusions in the Nanling Range,provide new evidences for no direct relationship between the tungsten mineralization and magmatism in the Woxi deposit." @default.
- W2392422904 created "2016-06-24" @default.
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- W2392422904 date "2014-01-01" @default.
- W2392422904 modified "2023-09-28" @default.
- W2392422904 title "Mineral deposit geology and trace element geochemistry of wolframite from the Woxi deposit,western Hunan,China" @default.
- W2392422904 hasPublicationYear "2014" @default.
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