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Article: Crustally-derived granites in the Panzhihua region, SW China: Implications for felsic magmatism in the Emeishan large igneous province

TitleCrustally-derived granites in the Panzhihua region, SW China: Implications for felsic magmatism in the Emeishan large igneous province
Authors
KeywordsAluminum saturation index
Crustal melting
Emeishan large igneous province
Granite
Late Permian
Zr saturation thermometry
Issue Date2011
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/lithos
Citation
Lithos, 2011, v. 123 n. 1-4, p. 145-157 How to Cite?
AbstractIn the Panxi region of the Late Permian (~260Ma) Emeishan large igneous province (ELIP) there is a bimodal assemblage of mafic and felsic plutonic rocks. Most Emeishan granitic rocks were derived by differentiation of basaltic magmas (i.e. mantle-derived) or by mixing between crustal melts and primary basaltic magmas (i.e. hybrid). The Yingpanliangzi granitic pluton within the city of Panzhihua intrudes Sinian (~600Ma) marbles and is unlike the mantle-derived or hybrid granitic rocks. The SHRIMP zircon U-Pb ages of the Yingpanliangzi pluton range from 259±8Ma to 882±22Ma. Younger ages are found on the zircon rims whereas older ages are found within the cores. Field relationships and petrography indicate that the Yingpanliangzi pluton must be <600Ma, therefore the older zircons are interpreted to represent the protolith age whereas the younger analyses represent zircon re-crystallization during emplacement. The Yingpanliangzi granites are metaluminous and have negative Ta-Nb PM anomalies, low εNd (260 Ma) values (-3.9 to -4.4), and high I Sr (0.71074 to 0.71507) consistent with a crustal origin. The recognition of a crustally-derived pluton along with mantle-derived and mantle-crust hybrid plutons within the Panxi region of the ELIP is evidence for a complete spectrum of sources. As a consequence, the types of Panxi granitoids can be distinguished according to their ASI, Eu/Eu*, εNd (T), εHf (T), T Zr(°C) and Nb-Ta PM values. The diverse granitic magmatism during the evolution of the ELIP from ~260Ma to ~252Ma demonstrates the complexity of crustal growth associated with LIPs. © 2010 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/139214
ISSN
2015 Impact Factor: 3.723
2015 SCImago Journal Rankings: 2.920
ISI Accession Number ID
Funding AgencyGrant Number
HKU
Academia Sinica
Funding Information:

We thank G.N. Eby, J.D. Greenough and HA. Sandeman for their constructive reviews and Drs. G.F. Zellmer and T.-F Yui for their comments on an earlier version of this manuscript. The authors would like to thank Professor Ma Yuxiao and Mr. Zhao Hao both from Chengdu University of Science and Technology for their field support and Mr. Liang Qi and Ms. Xiao Fu for their analytical support at the University of Hong Kong. This study is supported by a 973 matching grant from HKU and Academia Sinica post-doctoral fellowship to JGS.

References

 

DC FieldValueLanguage
dc.contributor.authorShellnutt, JGen_HK
dc.contributor.authorJahn, BMen_HK
dc.contributor.authorZhou, MFen_HK
dc.date.accessioned2011-09-23T05:47:12Z-
dc.date.available2011-09-23T05:47:12Z-
dc.date.issued2011en_HK
dc.identifier.citationLithos, 2011, v. 123 n. 1-4, p. 145-157en_HK
dc.identifier.issn0024-4937en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139214-
dc.description.abstractIn the Panxi region of the Late Permian (~260Ma) Emeishan large igneous province (ELIP) there is a bimodal assemblage of mafic and felsic plutonic rocks. Most Emeishan granitic rocks were derived by differentiation of basaltic magmas (i.e. mantle-derived) or by mixing between crustal melts and primary basaltic magmas (i.e. hybrid). The Yingpanliangzi granitic pluton within the city of Panzhihua intrudes Sinian (~600Ma) marbles and is unlike the mantle-derived or hybrid granitic rocks. The SHRIMP zircon U-Pb ages of the Yingpanliangzi pluton range from 259±8Ma to 882±22Ma. Younger ages are found on the zircon rims whereas older ages are found within the cores. Field relationships and petrography indicate that the Yingpanliangzi pluton must be <600Ma, therefore the older zircons are interpreted to represent the protolith age whereas the younger analyses represent zircon re-crystallization during emplacement. The Yingpanliangzi granites are metaluminous and have negative Ta-Nb PM anomalies, low εNd (260 Ma) values (-3.9 to -4.4), and high I Sr (0.71074 to 0.71507) consistent with a crustal origin. The recognition of a crustally-derived pluton along with mantle-derived and mantle-crust hybrid plutons within the Panxi region of the ELIP is evidence for a complete spectrum of sources. As a consequence, the types of Panxi granitoids can be distinguished according to their ASI, Eu/Eu*, εNd (T), εHf (T), T Zr(°C) and Nb-Ta PM values. The diverse granitic magmatism during the evolution of the ELIP from ~260Ma to ~252Ma demonstrates the complexity of crustal growth associated with LIPs. © 2010 Elsevier B.V.en_HK
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/lithosen_HK
dc.relation.ispartofLithosen_HK
dc.subjectAluminum saturation indexen_HK
dc.subjectCrustal meltingen_HK
dc.subjectEmeishan large igneous provinceen_HK
dc.subjectGraniteen_HK
dc.subjectLate Permianen_HK
dc.subjectZr saturation thermometryen_HK
dc.titleCrustally-derived granites in the Panzhihua region, SW China: Implications for felsic magmatism in the Emeishan large igneous provinceen_HK
dc.typeArticleen_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.lithos.2010.10.016en_HK
dc.identifier.scopuseid_2-s2.0-79952536910en_HK
dc.identifier.hkuros195320en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79952536910&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume123en_HK
dc.identifier.issue1-4en_HK
dc.identifier.spage145en_HK
dc.identifier.epage157en_HK
dc.identifier.isiWOS:000289335800011-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridShellnutt, JG=17343022500en_HK
dc.identifier.scopusauthoridJahn, BM=7006657468en_HK
dc.identifier.scopusauthoridZhou, MF=7403506005en_HK
dc.identifier.citeulike8214649-

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