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Article: Permian peralkaline, peraluminous and metaluminous A-type granites in the Panxi district, SW China: Their relationship to the Emeishan mantle plume

TitlePermian peralkaline, peraluminous and metaluminous A-type granites in the Panxi district, SW China: Their relationship to the Emeishan mantle plume
Authors
KeywordsA-type
Emeishan large igneous province
Metaluminous
Peralkaline
Peraluminous
SW China
Issue Date2007
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/chemgeo
Citation
Chemical Geology, 2007, v. 243 n. 3-4, p. 286-316 How to Cite?
AbstractNumerous Permian granitic intrusions (plutons) in the Panxi region, SW China are spatially and temporally associated with the Emeishan large igneous province (ELIP). Granites from the 260 Ma Panzhihua and Taihe plutons are peralkaline (ASI = 0.76-1.12; Na + K/Al = 0.78-1.2) and have high Fe* values (0.92-0.99) with negative Eu anomalies (Eu/Eu* = 0.22-0.98). Contrasted with the peralkaline plutons, syenites from the 260 Ma Woshui pluton are metaluminous (ASI = 0.84-1.0; Na + K/Al = 0.91-1.01) and have moderately high Fe* (0.79-0.81) and positive Eu-anomalies (Eu/Eu* = 0.82-1.91). Both the peralkaline and metaluminous rocks have mantle isotopic signatures (εNd(T) = + 1.3-+ 3.2) and were derived from the ELIP mantle plume source. The peralkaline rocks were likely derived by fractional crystallization of the temporally, spatially and chemically associated layered mafic intrusions which host giant magmatic Fe-Ti-V oxide deposits. The metaluminous granitic rocks, although spatially related to the peralkaline granites and layered gabbros were likely generated by partial melting of underplated mafic rocks. Granites from the 251 Ma Ailanghe pluton are peraluminous (ASI = 0.97-1.29) and have high Fe* (0.82-0.91) values and negative Eu-anomalies (Eu/Eu* = 0.10-0.37). Their crustal isotopic signature (εNd(T) = - 5.7 to - 6.7) indicates possible derivation from melting of Yangtze Block basement rocks. The Ailanghe pluton is contemporaneous with other A-type granites in the region, supporting the view that ELIP magmatism was sporadic for at least 9 million years. The coexistence of three chemically exclusive A-type granites in the ELIP suggests that a variety of A-type granites can be generated in the same tectonic setting. © 2007 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/72670
ISSN
2015 Impact Factor: 3.482
2015 SCImago Journal Rankings: 2.346
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorShellnutt, JGen_HK
dc.contributor.authorZhou, MFen_HK
dc.date.accessioned2010-09-06T06:44:00Z-
dc.date.available2010-09-06T06:44:00Z-
dc.date.issued2007en_HK
dc.identifier.citationChemical Geology, 2007, v. 243 n. 3-4, p. 286-316en_HK
dc.identifier.issn0009-2541en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72670-
dc.description.abstractNumerous Permian granitic intrusions (plutons) in the Panxi region, SW China are spatially and temporally associated with the Emeishan large igneous province (ELIP). Granites from the 260 Ma Panzhihua and Taihe plutons are peralkaline (ASI = 0.76-1.12; Na + K/Al = 0.78-1.2) and have high Fe* values (0.92-0.99) with negative Eu anomalies (Eu/Eu* = 0.22-0.98). Contrasted with the peralkaline plutons, syenites from the 260 Ma Woshui pluton are metaluminous (ASI = 0.84-1.0; Na + K/Al = 0.91-1.01) and have moderately high Fe* (0.79-0.81) and positive Eu-anomalies (Eu/Eu* = 0.82-1.91). Both the peralkaline and metaluminous rocks have mantle isotopic signatures (εNd(T) = + 1.3-+ 3.2) and were derived from the ELIP mantle plume source. The peralkaline rocks were likely derived by fractional crystallization of the temporally, spatially and chemically associated layered mafic intrusions which host giant magmatic Fe-Ti-V oxide deposits. The metaluminous granitic rocks, although spatially related to the peralkaline granites and layered gabbros were likely generated by partial melting of underplated mafic rocks. Granites from the 251 Ma Ailanghe pluton are peraluminous (ASI = 0.97-1.29) and have high Fe* (0.82-0.91) values and negative Eu-anomalies (Eu/Eu* = 0.10-0.37). Their crustal isotopic signature (εNd(T) = - 5.7 to - 6.7) indicates possible derivation from melting of Yangtze Block basement rocks. The Ailanghe pluton is contemporaneous with other A-type granites in the region, supporting the view that ELIP magmatism was sporadic for at least 9 million years. The coexistence of three chemically exclusive A-type granites in the ELIP suggests that a variety of A-type granites can be generated in the same tectonic setting. © 2007 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/chemgeoen_HK
dc.relation.ispartofChemical Geologyen_HK
dc.rightsChemical Geology. Copyright © Elsevier BV.en_HK
dc.subjectA-typeen_HK
dc.subjectEmeishan large igneous provinceen_HK
dc.subjectMetaluminousen_HK
dc.subjectPeralkalineen_HK
dc.subjectPeraluminousen_HK
dc.subjectSW Chinaen_HK
dc.titlePermian peralkaline, peraluminous and metaluminous A-type granites in the Panxi district, SW China: Their relationship to the Emeishan mantle plumeen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0009-2541&volume=243&spage=286&epage=316&date=2007&atitle=Permian+peralkaline,+peraluminous+and+metaluminous+A-type+granites+in+the+Panxi+district,+SW+China:+Their+relationship+to+the+Emeishan+mantle+plume.+en_HK
dc.identifier.emailZhou, MF:mfzhou@hkucc.hku.hken_HK
dc.identifier.authorityZhou, MF=rp00844en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.chemgeo.2007.05.022en_HK
dc.identifier.scopuseid_2-s2.0-34447621035en_HK
dc.identifier.hkuros144258en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-34447621035&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume243en_HK
dc.identifier.issue3-4en_HK
dc.identifier.spage286en_HK
dc.identifier.epage316en_HK
dc.identifier.isiWOS:000249186800006-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridShellnutt, JG=17343022500en_HK
dc.identifier.scopusauthoridZhou, MF=7403506005en_HK

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