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Article: Geochemistry of the Emeishan flood basalts at Yangliuping, Sichuan, SW China: Implications for sulfide segregation

TitleGeochemistry of the Emeishan flood basalts at Yangliuping, Sichuan, SW China: Implications for sulfide segregation
Authors
Issue Date2006
PublisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00410/index.htm
Citation
Contributions To Mineralogy And Petrology, 2006, v. 152 n. 1, p. 53-74 How to Cite?
AbstractA well-developed, 1,000 m thick basaltic sequence in the Yangliuping region, northern part of the Emeishan basalt province, includes the Lower and Middle Units of tholeiitic basalts and an Upper Unit of both tholeiites and subalkalic basalts. The basalts contain 42-55 wt% SiO2 and 4.1-8.3 wt% MgO. Most of these lavas have Gd/Yb > 2.0, Zr/Nb < 12, and εNd(260Ma) values from +2.5 to +4.7. The platinum-group elements (PGE) are very mildly depleted in most of the basalts which contain 8-19 ppb Pt and 7-27 ppb Pd. However, a significant proportion of the Middle Unit basalts are strongly depleted in PGE with some samples having concentrations lower than detection limits. They have extremely high Zr/Nb ratios (up to 14.5) and low εNd(260Ma) values (+3.21 to +0.65), features of extensive lower crustal contamination. Some samples in this unit have high Ni/Pd (3,965-61,198) and low Pd/Cr (410,000-3,930,000) ratios, indicating sulfide segregation and PGE depletion prior to eruption. The primary magmas were S-undersaturated and derived from partial melting at variable depths in the upper mantle. The early and late stage magmas, as represented by the Lower and Upper Units, underwent AFC processes which induced mild S-saturation and PGE depletion in some of the basalts, whereas the magmas represented by the Middle Unit experienced more extensive crustal contamination resulting in stronger S-saturation and in most cases significant PGE depletion. © Springer-Verlag 2006.
Persistent Identifierhttp://hdl.handle.net/10722/72911
ISSN
2015 Impact Factor: 3.218
2015 SCImago Journal Rankings: 2.582
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorSong, XYen_HK
dc.contributor.authorZhou, MFen_HK
dc.contributor.authorKeays, RRen_HK
dc.contributor.authorCao, ZMen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorQi, Len_HK
dc.date.accessioned2010-09-06T06:46:16Z-
dc.date.available2010-09-06T06:46:16Z-
dc.date.issued2006en_HK
dc.identifier.citationContributions To Mineralogy And Petrology, 2006, v. 152 n. 1, p. 53-74en_HK
dc.identifier.issn0010-7999en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72911-
dc.description.abstractA well-developed, 1,000 m thick basaltic sequence in the Yangliuping region, northern part of the Emeishan basalt province, includes the Lower and Middle Units of tholeiitic basalts and an Upper Unit of both tholeiites and subalkalic basalts. The basalts contain 42-55 wt% SiO2 and 4.1-8.3 wt% MgO. Most of these lavas have Gd/Yb > 2.0, Zr/Nb < 12, and εNd(260Ma) values from +2.5 to +4.7. The platinum-group elements (PGE) are very mildly depleted in most of the basalts which contain 8-19 ppb Pt and 7-27 ppb Pd. However, a significant proportion of the Middle Unit basalts are strongly depleted in PGE with some samples having concentrations lower than detection limits. They have extremely high Zr/Nb ratios (up to 14.5) and low εNd(260Ma) values (+3.21 to +0.65), features of extensive lower crustal contamination. Some samples in this unit have high Ni/Pd (3,965-61,198) and low Pd/Cr (410,000-3,930,000) ratios, indicating sulfide segregation and PGE depletion prior to eruption. The primary magmas were S-undersaturated and derived from partial melting at variable depths in the upper mantle. The early and late stage magmas, as represented by the Lower and Upper Units, underwent AFC processes which induced mild S-saturation and PGE depletion in some of the basalts, whereas the magmas represented by the Middle Unit experienced more extensive crustal contamination resulting in stronger S-saturation and in most cases significant PGE depletion. © Springer-Verlag 2006.en_HK
dc.languageengen_HK
dc.publisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00410/index.htmen_HK
dc.relation.ispartofContributions to Mineralogy and Petrologyen_HK
dc.titleGeochemistry of the Emeishan flood basalts at Yangliuping, Sichuan, SW China: Implications for sulfide segregationen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0010-7999&volume=152&spage=53&epage=74&date=2006&atitle=Geochemistry+of+the+Emeishan+flood+basalts+at+Yangliuping,+Sichuan,+SW+China:+implications+for+sulfide+segregationen_HK
dc.identifier.emailZhou, MF:mfzhou@hkucc.hku.hken_HK
dc.identifier.emailSun, M:minsun@hku.hken_HK
dc.identifier.authorityZhou, MF=rp00844en_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s00410-006-0094-3en_HK
dc.identifier.scopuseid_2-s2.0-33745152726en_HK
dc.identifier.hkuros120046en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33745152726&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume152en_HK
dc.identifier.issue1en_HK
dc.identifier.spage53en_HK
dc.identifier.epage74en_HK
dc.identifier.isiWOS:000238444900004-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridSong, XY=7402269092en_HK
dc.identifier.scopusauthoridZhou, MF=7403506005en_HK
dc.identifier.scopusauthoridKeays, RR=7005122208en_HK
dc.identifier.scopusauthoridCao, ZM=7402432464en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK
dc.identifier.scopusauthoridQi, L=7202149924en_HK

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