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Article: Controls on variations of platinum-group element concentrations in the sulfide ores of the Jinchuan Ni-Cu deposit, western China

TitleControls on variations of platinum-group element concentrations in the sulfide ores of the Jinchuan Ni-Cu deposit, western China
Authors
KeywordsIridium
Jinchuan
Nickel
Platinum
Sulfide
Issue Date2008
PublisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00126/index.htm
Citation
Mineralium Deposita, 2008, v. 43 n. 6, p. 609-622 How to Cite?
AbstractOngoing underground exploration in the giant Jinchuan Ni-Cu sulfide deposit in western China is beginning to emphasize the potential for Cu-, Pt-, and Pd-rich sulfide ores that may have formed by sulfide liquid fractionation. The success of such an effort relies on whether or not fractional crystallization of sulfide occurred in the Jinchuan system. In this paper, we used available PGE data to evaluate such a process. We found that about two thirds of the 126 samples analyzed to date exhibit significant decoupling not only between Pt and Pd but also between Ru, Rh, and Ir. The best explanation for the decoupling is postmagmatic hydrothermal alteration, which affected not only silicates but also sulfides. The effects of postmagmatic alteration must be considered when using metal and isotopic ratios to evaluate primary mineralization. PGE variations in the remaining one third of the samples with Ir/(Ir + Ru) = 0.3-0.7, Ir/(Ir + Rh) = 0.4-0.8, and Pt/(Pt + Pd) = 0.3-0.7 indicate variable R-factors within individual ore bodies as well as the entire deposit, consistent with the interpretation that multiple sulfide-bearing magmas from depth were involved in the formation of the Jinchuan deposit. The mantle-normalized PGE patterns of the least-altered samples from the Jinchuan deposit are similar to the picrite-related Pechenga Ni-Cu sulfide deposit in Russia. PGE variations that can be related to sulfide liquid fractionation are observed in orebody-1 and orebody-24 but not in orebody-2 at Jinchuan. Exploration for Cu-, Pt-, and Pd-rich sulfide ores that may have been expelled into fractures in the footwalls of orebody-1 and orebody-24 appears to be justified. © Springer-Verlag 2008.
Persistent Identifierhttp://hdl.handle.net/10722/72671
ISSN
2015 Impact Factor: 3.467
2015 SCImago Journal Rankings: 1.677
ISI Accession Number ID
Funding AgencyGrant Number
Natural Science Foundation of China40472051
40534020
Project-111 from the Ministry of Education of China1307011
Funding Information:

We are grateful to the Jinchuan Nickel Company for permission of underground sampling, and to Yulong Tian, Jianpu Jiang, and Yushan Wang of the Company for field assistance. Critical comments from Associate Editor Dr. Peter Lightfoot, reviewer Dr. Steve Barnes, and an anonymous reviewer greatly improved the manuscript. This research was supported by the Natural Science Foundation of China (grants 40472051 and 40534020) and Project-111 from the Ministry of Education of China (1307011).

References

 

DC FieldValueLanguage
dc.contributor.authorSu, Sen_HK
dc.contributor.authorLi, Cen_HK
dc.contributor.authorZhou, MFen_HK
dc.contributor.authorRipley, EMen_HK
dc.contributor.authorQi, Len_HK
dc.date.accessioned2010-09-06T06:44:01Z-
dc.date.available2010-09-06T06:44:01Z-
dc.date.issued2008en_HK
dc.identifier.citationMineralium Deposita, 2008, v. 43 n. 6, p. 609-622en_HK
dc.identifier.issn0026-4598en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72671-
dc.description.abstractOngoing underground exploration in the giant Jinchuan Ni-Cu sulfide deposit in western China is beginning to emphasize the potential for Cu-, Pt-, and Pd-rich sulfide ores that may have formed by sulfide liquid fractionation. The success of such an effort relies on whether or not fractional crystallization of sulfide occurred in the Jinchuan system. In this paper, we used available PGE data to evaluate such a process. We found that about two thirds of the 126 samples analyzed to date exhibit significant decoupling not only between Pt and Pd but also between Ru, Rh, and Ir. The best explanation for the decoupling is postmagmatic hydrothermal alteration, which affected not only silicates but also sulfides. The effects of postmagmatic alteration must be considered when using metal and isotopic ratios to evaluate primary mineralization. PGE variations in the remaining one third of the samples with Ir/(Ir + Ru) = 0.3-0.7, Ir/(Ir + Rh) = 0.4-0.8, and Pt/(Pt + Pd) = 0.3-0.7 indicate variable R-factors within individual ore bodies as well as the entire deposit, consistent with the interpretation that multiple sulfide-bearing magmas from depth were involved in the formation of the Jinchuan deposit. The mantle-normalized PGE patterns of the least-altered samples from the Jinchuan deposit are similar to the picrite-related Pechenga Ni-Cu sulfide deposit in Russia. PGE variations that can be related to sulfide liquid fractionation are observed in orebody-1 and orebody-24 but not in orebody-2 at Jinchuan. Exploration for Cu-, Pt-, and Pd-rich sulfide ores that may have been expelled into fractures in the footwalls of orebody-1 and orebody-24 appears to be justified. © Springer-Verlag 2008.en_HK
dc.languageengen_HK
dc.publisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00126/index.htmen_HK
dc.relation.ispartofMineralium Depositaen_HK
dc.subjectIridiumen_HK
dc.subjectJinchuanen_HK
dc.subjectNickelen_HK
dc.subjectPlatinumen_HK
dc.subjectSulfideen_HK
dc.titleControls on variations of platinum-group element concentrations in the sulfide ores of the Jinchuan Ni-Cu deposit, western Chinaen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0026-4598&volume=43&spage=609&epage=622&date=2008&atitle=Controls+on+variations+of+platinum-group+element+concentrations+in+the+sulfide+ores+of+the+Jinchuan+Ni-Cu+deposit,+western+Chinaen_HK
dc.identifier.emailZhou, MF:mfzhou@hkucc.hku.hken_HK
dc.identifier.authorityZhou, MF=rp00844en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s00126-008-0186-2en_HK
dc.identifier.scopuseid_2-s2.0-49449092288en_HK
dc.identifier.hkuros153184en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-49449092288&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume43en_HK
dc.identifier.issue6en_HK
dc.identifier.spage609en_HK
dc.identifier.epage622en_HK
dc.identifier.isiWOS:000258324800002-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridSu, S=7402030074en_HK
dc.identifier.scopusauthoridLi, C=8092856900en_HK
dc.identifier.scopusauthoridZhou, MF=7403506005en_HK
dc.identifier.scopusauthoridRipley, EM=7007165825en_HK
dc.identifier.scopusauthoridQi, L=7202149924en_HK
dc.identifier.citeulike3149121-

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