File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Reworking of the Tarim Craton by underplating of mantle plume-derived magmas: Evidence from Neoproterozoic granitoids in the Kuluketage area, NW China

TitleReworking of the Tarim Craton by underplating of mantle plume-derived magmas: Evidence from Neoproterozoic granitoids in the Kuluketage area, NW China
Authors
KeywordsAdakitic rocks
Craton reworking
Mantle plume
Tarim
Underplating
Issue Date2011
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/precamres
Citation
Precambrian Research, 2011, v. 187 n. 1-2, p. 1-14 How to Cite?
AbstractMost Neoproterozoic granitoids in the Kuluketage area, northern Tarim Craton are characterized by strongly depleted HREE abundances and high Sr/Y and (La/Yb) N ratios, showing typical geochemical features of adakitic rocks. Zircon U-Pb dating of three adakitic plutons yielded Neoproterozoic ages (754±4, 790±3 and 798±3 Ma). The adakitic granitoids exhibit low MgO and TiO 2 contents. Their low Cr, Co and Ni abundances, low e{open} Hf(t) values (-21 to -11) and high FeO T/MgO ratios (mostly 2.2-2.9) preclude the possibility of being derived from partial melts of delaminated lower crust. The relatively low e{open} Hf(t) values and old Hf two-stage model ages (TDM2=2.42-3.02 Ga) of the adakitic granitoids are similar to those of the basement rocks in the northern Tarim Craton, suggesting that the adakitic rocks were generated by partial melting of basement rocks in a thickened lower crust. Apart from the adakitic granitoids, Neoproterozoic normal I-type granitoids with low Sr/Y and (La/Yb) N ratios are also exposed in this area, and their geochemistry indicates a crustal origin at a shallower depth. Zircon U-Pb dating of the I-type granitoids also yielded a Neoproterozoic age of 785±8 Ma. The petrogenesis of the Neoproterozoic adakitic granitoids suggests that Neoproterozoic crustal thickness in the northern Tarim Craton must have been over 50km. In combination with the occurrence of coeval mantle-derived dykes and bimodal volcanic rocks, a partial melting scheme triggered by underplating of mantle plume-derived magmas is proposed to interpret the formation of the Neoproterozoic adakitic and I-type granitoids. This model provides an alternative interpretation for the Neoproterozoic craton reworking happened in the Rodinia supercontinent. © 2011 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/139177
ISSN
2015 Impact Factor: 4.037
2015 SCImago Journal Rankings: 3.214
ISI Accession Number ID
Funding AgencyGrant Number
National Basic Research Program of China2007CB411308
National Natural Science Foundation of China40803009
41073031
CASKZCX2-YWQ08-3-6
CAS/SAFEA
Funding Information:

This study was supported by the National Basic Research Program of China (2007CB411308), National Natural Science Foundation of China (40803009, 41073031), Knowledge Innovation Project of CAS (KZCX2-YWQ08-3-6) and CAS/SAFEA International Partnership Program for Creative Research Teams. This is contribution No. IS-1308 from GIGCAS.

References

 

DC FieldValueLanguage
dc.contributor.authorLong, Xen_HK
dc.contributor.authorYuan, Cen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorKröner, Aen_HK
dc.contributor.authorZhao, Gen_HK
dc.contributor.authorWilde, Sen_HK
dc.contributor.authorHu, Aen_HK
dc.date.accessioned2011-09-23T05:46:22Z-
dc.date.available2011-09-23T05:46:22Z-
dc.date.issued2011en_HK
dc.identifier.citationPrecambrian Research, 2011, v. 187 n. 1-2, p. 1-14en_HK
dc.identifier.issn0301-9268en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139177-
dc.description.abstractMost Neoproterozoic granitoids in the Kuluketage area, northern Tarim Craton are characterized by strongly depleted HREE abundances and high Sr/Y and (La/Yb) N ratios, showing typical geochemical features of adakitic rocks. Zircon U-Pb dating of three adakitic plutons yielded Neoproterozoic ages (754±4, 790±3 and 798±3 Ma). The adakitic granitoids exhibit low MgO and TiO 2 contents. Their low Cr, Co and Ni abundances, low e{open} Hf(t) values (-21 to -11) and high FeO T/MgO ratios (mostly 2.2-2.9) preclude the possibility of being derived from partial melts of delaminated lower crust. The relatively low e{open} Hf(t) values and old Hf two-stage model ages (TDM2=2.42-3.02 Ga) of the adakitic granitoids are similar to those of the basement rocks in the northern Tarim Craton, suggesting that the adakitic rocks were generated by partial melting of basement rocks in a thickened lower crust. Apart from the adakitic granitoids, Neoproterozoic normal I-type granitoids with low Sr/Y and (La/Yb) N ratios are also exposed in this area, and their geochemistry indicates a crustal origin at a shallower depth. Zircon U-Pb dating of the I-type granitoids also yielded a Neoproterozoic age of 785±8 Ma. The petrogenesis of the Neoproterozoic adakitic granitoids suggests that Neoproterozoic crustal thickness in the northern Tarim Craton must have been over 50km. In combination with the occurrence of coeval mantle-derived dykes and bimodal volcanic rocks, a partial melting scheme triggered by underplating of mantle plume-derived magmas is proposed to interpret the formation of the Neoproterozoic adakitic and I-type granitoids. This model provides an alternative interpretation for the Neoproterozoic craton reworking happened in the Rodinia supercontinent. © 2011 Elsevier B.V.en_HK
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/precamresen_HK
dc.relation.ispartofPrecambrian Researchen_HK
dc.subjectAdakitic rocksen_HK
dc.subjectCraton reworkingen_HK
dc.subjectMantle plumeen_HK
dc.subjectTarimen_HK
dc.subjectUnderplatingen_HK
dc.titleReworking of the Tarim Craton by underplating of mantle plume-derived magmas: Evidence from Neoproterozoic granitoids in the Kuluketage area, NW Chinaen_HK
dc.typeArticleen_HK
dc.identifier.emailSun, M:minsun@hku.hken_HK
dc.identifier.emailZhao, G:gzhao@hkucc.hku.hken_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.identifier.authorityZhao, G=rp00842en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.precamres.2011.02.001en_HK
dc.identifier.scopuseid_2-s2.0-79954943757en_HK
dc.identifier.hkuros193896en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79954943757&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume187en_HK
dc.identifier.issue1-2en_HK
dc.identifier.spage1en_HK
dc.identifier.epage14en_HK
dc.identifier.isiWOS:000290745900001-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridLong, X=14012199100en_HK
dc.identifier.scopusauthoridYuan, C=35241599200en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK
dc.identifier.scopusauthoridKröner, A=7006453132en_HK
dc.identifier.scopusauthoridZhao, G=7403296321en_HK
dc.identifier.scopusauthoridWilde, S=35254758600en_HK
dc.identifier.scopusauthoridHu, A=7202699686en_HK
dc.identifier.citeulike8929871-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats