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- W2376210280 abstract "Mafic-ultramafic intrusion is a main vector of magmatic sulfide(Ni-Cu-PGE) deposits and oxide(Fe-Ti-V-P) deposits in the world.The world's major magmatic sulfide deposits and magmatic oxide deposits can occur in large igneous provinces,cratonic rift zone areas or extension setting,stretching post-collisional environment of the folded belt.The scale of host rock of magmatic sulphide deposits varies greatly(from 6×104km2 to 0.1km2),the rock associations have ultramafic rocks and mafic rocks,but their primary magma are mainly tholeiitic magma.The PGE deposits bearing Ni-Cu host mainly in large-scale stratified intrusions,while the Ni-Cu sulfide deposit occurs in small intrusions.Vanadium-titanium magnetite or magnetite deposits host mainly in layered gabbro complex and ilmenite-apatite deposits are host in layered intrusions with anorthosite-mangerite-charnockite associations.Although the rock composition varies greatly,but its primary magma belongs to tholeiitic.Host rock of sulphide deposit is relatively rich in Si,Mg,Cr,Ni,while host rock of oxide deposits is relatively rich in Fe-Ti-P-V,rock-forming mineral crystal chemistry also reflects the difference.The critical factor of the contrast is the pressure of magma generation,whereas the difference in the magma source and the extent of melting may only play a role in the local area.The view for the ore forming processes of magmatic sulfide deposits are represented by the Jinchuan model and magma conduit model,and that of oxide deposit by whether oxide and apatite are cumulates or crystals from immiscible oxide liquid.Comparative analysis shows that the mineralizing process is complex,and it may not be preferable that trying to use a model to interpret the process of all the similar deposits.There is no doubt that an appropriate redox environment is the necessary conditions for the formation of magmatic deposits.Accompanied by crystallization of magma and mineralizing process of change in oxygen fugacity and incentive problems remain to be explored further." @default.
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- W2376210280 date "2011-01-01" @default.
- W2376210280 modified "2023-09-25" @default.
- W2376210280 title "Comparison of host magmatic sulphide and oxide deposits of mafic-ultramafic intrusions and review the mineralizing process" @default.
- W2376210280 hasPublicationYear "2011" @default.
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