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- W2368983265 abstract "Pb-Zn-Ag ore deposit in Meixian,Youxi County is located at the south of the Zhenghe-Dehua pre-Cambrian metamorphic area,and geologically situated at Shouning-Hua'an sub-basement uplift zone in Eastern Fujian volcanic depression belt,east of the NE-striking Lishui-Haifeng fault.The ore-bearing beds of Fengyan ore deposit is mainly the Upper Proterozoic Dongyan Fomation of Mamianshan Group(Pt_3dy).The Pb-Zn-Ag ore bodies are of strata bound type.Petrology and geochemistry studies show that the ore-bearing Dongyan Formation is a paleo-volcanic sedimentary formation dominated by greenshists.The formation of the basaltic magma may be related to the slab subduction.The original rocks of the greenshists are basaltic rocks,and granulites are mainly dacite and rhyolite.Geochemical study of ore deposit reveals that the ore deposit is characterized by multiple ore-forming processes and various kinds of sulfur sources.The composition and evolution of Pb isotopes show that different Pb sources from mantle to orogenic belt and upper crust are intermingled.The evolvement is of clear trend and demonstrates a superposition of multiple geological events.The REE pattern of metal sulfides shows a down-to-right slope with remarkable differentiation between LREE and HREE.Compared to MORB,the different trace elements are depleted and enriched to different degrees.High field strength elements(HFSE: Nb,Ta,Zr,Hf) show distinct negative anomaly and are strongly depleted while Pb,Rb and Ba are relatively enriched.Metavolcanics in the Dongyan Formation,with the same trend of HFSE depletion and the enrichment of LFSE,displays typical features of arc-magma related to subduction and indicates that the ore deposit and the Dongyan vocanics were formed under the arc environment with subduction background." @default.
- W2368983265 created "2016-06-24" @default.
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- W2368983265 date "2009-01-01" @default.
- W2368983265 modified "2023-09-22" @default.
- W2368983265 title "GEOCHEMISTRY AND PALEO-TECTONIC ENVIRONMENT OF FENGYAN Pb-Zn ORE DEPOSIT IN MEIXIAN,CENTRAL FUJIAN PROVINCE" @default.
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