Comparison Of Geology And Mineralization Process Between Two Typical Small Intrusion Deposits, Jinchuan In China And Voisey’s Bay In Canada

Jinchuan and Voisey’s Bay are both large magmatic Cu-Ni sulfide deposits. On thebasis of previous research data, this paper provides systematical comparison of theirgeological features, mineral and petrology, geochemistry, ore mineralization characteristics,isotope geochemistry, to explore their similarities and differences of metallogenic models,as well as their geology and mineralization processes. It provides basic results for thecomparison and exchange of the metallogenic theory of small intrusion and the theory ofmagma channels.Jinchuan and Voisey’s Bay deposit are both formed in the Proterozoic and tectonicsetting environment of rift or continental margin rift. Both of their parental magmas arepicritic or high-Mg basaltic magma, magma source are enriched lithosphere continentalmantle. Their intrusions hosting sulfide ore are both complex intrusions. The magma ofJinchuan and the Voisey’s Bay are contaminated more or less during they ascended throwlower and upper crust from the source. The major sulfide are both segregated at depth, notin situ within the dyke, and then the magmas were likely emplaced through the dyke as anumber of silicate and sulfide laden pulses. However, there are some differences betweenthe deposits in the sulfur-rich rocks material contamination and the main ore types andsulfide ore occurrence in the intrusions. Though contrasting Jinchuan magma segregation-deep preconcentration–multi-pulses metallogenic model and Voisey’s Bay magma channelmodel, this paper suggests that Voisey’s Bay deposit may also have the geological processof deep preconcentration, which is similar with Jinchuan deposit.