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- W2380498567 abstract "Incompatible lithophile elements and their isotopic systems,such as Rb-Sr,Sm-Nd,and U-Pb,are widely used in the genesis study of granite,but they are less useful as indicators of mantle sources because they are vulnerable to incorporation of continental materials.In contrast,Re and Os provide unique tools for tracing mantle sources because of their chalcophile and siderophile nature,and because of the compatible behavior of Os during mantle melting.The Re-Os isotopic system is thus a highly sensitive monitor of the extent of mantle involvement during granite genesis.In this study,Re and Os concentration and Os isotopic composition have been obtained for 15 granite samples from three major stages in order to assess the role of mantle involvement in the genesis of each stage granite from the Qitianling granite batholith(QGB).These samples have low Re concentrations(0.0053 to 0.4539 ngg,whole rock),and low common Os concentrations(0.0011 to 0.0328 ngg,whole rock).The initial Os isotope ratios of individual stage granite vary considerably in range of 0.3543 to 1.728,showing crust and mantle contributions to the granite genesis.The initial Os isotope ratios of the latest stage fine-grained biotite granite,which closely related to the Furong Sn deposit both spatially and genetically,are generally lower than those of the other two stage granites,indicating more mantle contributions.The initial Os isotope ratios of the earliest stage hornblende-biotite monzonitic granites,which closely related to the Xintianling W deposit,are generally higher,indicating more crustal contributions.Os isotope study is important for researches on crust-mantle interaction process and the mantle-derived magma in the formation of different types of mineralized granite in the Nanling range." @default.
- W2380498567 created "2016-06-24" @default.
- W2380498567 creator A5072862453 @default.
- W2380498567 date "2012-01-01" @default.
- W2380498567 modified "2023-09-23" @default.
- W2380498567 title "A Premilinary Study of Os Isotope in Tracing of Sources for Granitoids:A Case Study of the Qitianling Pluton" @default.
- W2380498567 hasPublicationYear "2012" @default.
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