GYIG OpenIR  > 矿床地球化学国家重点实验室  > 期刊论文
Siderophile and chalcophile elemental constraints on the origin of the Jinchuan Ni-Cu-(PGE) sulfide deposit, NW China
Xie-Yan Song; Reid R. Keays; Mei-Fu Zhou; Liang Qi; Christian Ihlenfeld; Jia-Fei Xiao
2009
Source PublicationGeochimica et Cosmochimica Acta
Volume73Issue:2Pages:404-424
Abstract

The Jinchuan deposit, NW China, is one of the world’s most important Ni-Cu-(PGE) sulfide deposits related to a magma conduit system and is hosted in an ultramafic intrusion. The intrusion is composed of lherzolite and dunite with the two largest sulfide ore bodies (named as ore body 1 and 2) in its middle portion. The sulfide ores may be disseminated, net-textured, or massive. The disseminated and net-textured sulfide ores are characterized by variable but generally low PGE concentrations: 10–3200 ppb Pt, 240–9800 ppb Pd, 17–800 ppb Ir, 25–1500 ppb Ru, and 15–400 ppb Rh in 100% sulfides. The massive sulfide ores are extremely low in Pt (<30 ppb) on a 100% sulfides and have very high Cu/Pd ratios, ranging from 104 to 4.5 × 105. The low PGE contents suggest that the sulfide ores formed from the silicate magmas that had already experienced prior-sulfide separation.

Our calculations indicate that if the first stage basaltic magmas had contained 6.3 ppb Pt, 6.2 ppb Pd, and 0.1 ppb Ir, 0.008% sulfide removal would result in PGE-depletion in the residual magma with 0.57 ppb Pt, 0.25 ppb Pd, and 0.009 ppb Ir. The Jinchuan sulfides were formed by a second stage of sulfide segregation from a PGE-depleted magma under silicate/sulfide liquid ratios (R-factor) ranging from 103 to 104 in a deep-seated staging chamber. The massive sulfide ores and some of the net-textured sulfide ores exhibit strong negative Pt-anomalies that cannot be explained by sulfide segregation under variable R-factors. Instead, the sulfide melts that formed the massive ores were segregated from magmas experienced prior fractionation of Pt–Fe alloy. Alternatively, the Pt may have been selectively leached by hydrothermal fluids during remobilization of the sulfide melts that produced the massive sulfides, which occur in cross-cutting veins. We propose that the Jinchuan intrusion and ore bodies were formed by injections of sulfide-free and sulfide-bearing olivine mushes from a deep-seated staging chamber.

KeywordSiderophile Chalcophile Elemental Ni-cu-(Pge) Sulfide Jinchuan
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/352002/4096
Collection矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文
矿床地球化学国家重点实验室
Recommended Citation
GB/T 7714
Xie-Yan Song,Reid R. Keays,Mei-Fu Zhou,et al. Siderophile and chalcophile elemental constraints on the origin of the Jinchuan Ni-Cu-(PGE) sulfide deposit, NW China[J]. Geochimica et Cosmochimica Acta,2009,73(2):404-424.
APA Xie-Yan Song,Reid R. Keays,Mei-Fu Zhou,Liang Qi,Christian Ihlenfeld,&Jia-Fei Xiao.(2009).Siderophile and chalcophile elemental constraints on the origin of the Jinchuan Ni-Cu-(PGE) sulfide deposit, NW China.Geochimica et Cosmochimica Acta,73(2),404-424.
MLA Xie-Yan Song,et al."Siderophile and chalcophile elemental constraints on the origin of the Jinchuan Ni-Cu-(PGE) sulfide deposit, NW China".Geochimica et Cosmochimica Acta 73.2(2009):404-424.
Files in This Item: Download All
File Name/Size DocType Version Access License
Siderophile and chal(2238KB) 开放获取LicenseView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Xie-Yan Song]'s Articles
[Reid R. Keays]'s Articles
[Mei-Fu Zhou]'s Articles
Baidu academic
Similar articles in Baidu academic
[Xie-Yan Song]'s Articles
[Reid R. Keays]'s Articles
[Mei-Fu Zhou]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Xie-Yan Song]'s Articles
[Reid R. Keays]'s Articles
[Mei-Fu Zhou]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Siderophile and chalcophile elemental constraints on the origin of the Jinchuan Ni-Cu-(PGE) sulfide deposit, NW China.pdf
Format: Adobe PDF
This file does not support browsing at this time
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.