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- W2367820056 abstract "The Tulaergen magmatic Ni-Cu sulfide deposit,located in the eastern part of the Huangshan-Jingerquan Cu-Ni mineralization belt,is controlled by the NEE-trending secondary crushing squeeze belt of the Kangguertage-Huangshan ductile shear zone. There are three mafic-ultramafic intrusions named as No. I,II,and III complexes in the Tulaergen ore field,respectively. Orebody No. I,distributed in the No. I mafic-ultramafic intrusion,is the primary orebody of the Tulaergen deposit. Gabbro,hornblende peridotite,lherzolite and hornblende lherzolite are major rock units in the intrusion.Hornblende peridotite is the main host rock of orebody. The alteration of ultramafic rocks is intensive on the surface,and crustal contamination of the rocks from boreholes is common. In this paper,we observe the shape,structure and texture of silicate minerals,compare the component of plagioclase from sulfide-bearing and sulfide-poor ultramafic rocks,in order to reveal the magma evolution and mineralization. The results show that the crystallization order of major silicate minerals is olivine-pyroxene / hornblende- hornblende. Olivine is anhedral to subhedral and commonly enclosed in large clinopyroxene,orthopyroxene and hornblende crystal,while barely enclosed in plagioclase. So we consider that plagioclase may be the mineral crystallized alone,which is slightly later than olivine. Plagioclase content increases with decreasing sulfide content in sulfide-bearing hornblende peridotite. Increasing plagioclase SiO2content of sulfide-bearing hornblende peridotite from deep to shallow implies that they are crystal fractionation from the similar magma. The major oxide components of plagioclase can be used as the indicator of the sulfide ore. The SiO2,Al2O3,CaO,Na2O and K2O components of plagioclase are highly variable in the sulfide-rich rocks." @default.
- W2367820056 created "2016-06-24" @default.
- W2367820056 creator A5080707459 @default.
- W2367820056 date "2014-01-01" @default.
- W2367820056 modified "2023-09-28" @default.
- W2367820056 title "Mineral Characteristics and Mineralization of the Tulaergen Magmatic Ni-Cu Sulfide Deposit,Eastern Tianshan: Constraints from Major Oxide compositions of Plagioclase" @default.
- W2367820056 hasPublicationYear "2014" @default.
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