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Article: Characteristics of platinum-group elements in basalts from spreading axis of Mariana Trough

TitleCharacteristics of platinum-group elements in basalts from spreading axis of Mariana Trough
Authors
KeywordsBack-arc basin basalt
Basin evolution
Negative platinum anomaly
Platinum-group elements
Subduction zone
Issue Date2007
Citation
Acta Oceanologica Sinica, 2007, v. 26 n. 4, p. 63-71 How to Cite?
AbstractTotal platinum-group elements (PGEs) abundances in basalts from the spreading axis of Mariana Trough ranged from 0.418 × 109 to 1.022 × 10-9, and primitive mantle-normalized PGE patterns are of positive slope showing the relative enrichment of PPGE (platinum, palladium, rhodium) and gold relative to IPGE. Compared with other mantle-originated rocks, these basalts have lower PGE contents and wider ranges of primitive mantle-normalized ratios of palladium content to iridium one, palladium content to platinum one and palladium content to gold one exhibiting relative platinum and iridium depletion. Characteristics of PGE patterns indicated that the studied Mariana Trough basalts originated from low partial melting, and the MORB mantle beneath the spreading center had been contaminated by the arc-island mantle. In the aspect of trace elements, Mariana Trough basalts showed the enrichment of LILE, lead and LREE, indicating that they had been influenced by subduction compositions. All these demonstrated that Mariana Trough basalts are products of partial melting from a mixed mantle (the contamination of MORB mantle by arc-island mantle).
Persistent Identifierhttp://hdl.handle.net/10722/72929
ISSN
2015 Impact Factor: 0.631
2015 SCImago Journal Rankings: 0.295
References

 

DC FieldValueLanguage
dc.contributor.authorCao, Zen_HK
dc.contributor.authorZheng, Jen_HK
dc.contributor.authorZhou, Men_HK
dc.contributor.authorAn, Wen_HK
dc.contributor.authorQi, Len_HK
dc.date.accessioned2010-09-06T06:46:26Z-
dc.date.available2010-09-06T06:46:26Z-
dc.date.issued2007en_HK
dc.identifier.citationActa Oceanologica Sinica, 2007, v. 26 n. 4, p. 63-71en_HK
dc.identifier.issn0253-505Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/72929-
dc.description.abstractTotal platinum-group elements (PGEs) abundances in basalts from the spreading axis of Mariana Trough ranged from 0.418 × 109 to 1.022 × 10-9, and primitive mantle-normalized PGE patterns are of positive slope showing the relative enrichment of PPGE (platinum, palladium, rhodium) and gold relative to IPGE. Compared with other mantle-originated rocks, these basalts have lower PGE contents and wider ranges of primitive mantle-normalized ratios of palladium content to iridium one, palladium content to platinum one and palladium content to gold one exhibiting relative platinum and iridium depletion. Characteristics of PGE patterns indicated that the studied Mariana Trough basalts originated from low partial melting, and the MORB mantle beneath the spreading center had been contaminated by the arc-island mantle. In the aspect of trace elements, Mariana Trough basalts showed the enrichment of LILE, lead and LREE, indicating that they had been influenced by subduction compositions. All these demonstrated that Mariana Trough basalts are products of partial melting from a mixed mantle (the contamination of MORB mantle by arc-island mantle).en_HK
dc.languageengen_HK
dc.relation.ispartofActa Oceanologica Sinicaen_HK
dc.subjectBack-arc basin basalten_HK
dc.subjectBasin evolutionen_HK
dc.subjectNegative platinum anomalyen_HK
dc.subjectPlatinum-group elementsen_HK
dc.subjectSubduction zoneen_HK
dc.titleCharacteristics of platinum-group elements in basalts from spreading axis of Mariana Troughen_HK
dc.typeArticleen_HK
dc.identifier.emailZhou, M:mfzhou@hkucc.hku.hken_HK
dc.identifier.authorityZhou, M=rp00844en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-36048938361en_HK
dc.identifier.hkuros144253en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-36048938361&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume26en_HK
dc.identifier.issue4en_HK
dc.identifier.spage63en_HK
dc.identifier.epage71en_HK
dc.identifier.scopusauthoridCao, Z=9633826000en_HK
dc.identifier.scopusauthoridZheng, J=36839913300en_HK
dc.identifier.scopusauthoridZhou, M=7403506005en_HK
dc.identifier.scopusauthoridAn, W=14015011600en_HK
dc.identifier.scopusauthoridQi, L=7202149924en_HK

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