Title: Ore composition and hosting condition in the Jianchaling sulfide nickel deposit, Shaanxi province
Abstract: On the basis of reserching in composition feature and existing phase of ores from the Jianchaling sulfide nickel deposit by means of new and high-precision ICP-MS analysis technique, its mechanism and type of metallogenesis is futher studied with new thoughts and methods. The main composition of ore in the Jianchaling sulfide nickel deposit includes Ni,Cu,Co,Fe,S,PGE, and so on, its high Ni/Cu value and lower content of Cu,PGE indicate that the formation of the nickel deposit resulted from the evolution of high-Mg magma. The nickel deposit has two typed ores, the pyrrhotite-pentlandite type and pyrite-millerite-polydymite type, and the first type is predominant, which proved that the formation of the nickel deposit at least experienced the former magmatic metallogensis and the later hydrothermal metamorphism reconstructed metallogensis two periods. Therefore, the deposit should be magma melt-hydrothermal reconstructed type. The nickel in ores exsist mostly by simple nickel minerals, such as pentlandite, violarite, millerite and polydymite, and its hosting condition is sulfide-, silisic-, and sulfate nickel three shapes. The first is dominant. During the intrusion process of the Jianchaling ultra-basic rock, the nickel deposit is formed inside or in the margin of rockbody in Neo-Proterozoic, and subsequently the gold deposit was formed in the contacting belt of rockbodies in the Indosinian-Yanshanian time companying the evolution and differentiation of magma. It is a metallogenic series that have inner genic relation in the uniform metallogenic system involved with mantle-sourced ultra-basic rock.
Publication Year: 2005
Publication Date: 2005-01-01
Language: en
Type: article
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Cited By Count: 1
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