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Conference Paper: Subduction-related origin of the 750 Ma Xuelongbao adakitic complex (Sichuan Province, China): Implications for the tectonic setting of the giant Neoproterozoic magmatic event in South China

TitleSubduction-related origin of the 750 Ma Xuelongbao adakitic complex (Sichuan Province, China): Implications for the tectonic setting of the giant Neoproterozoic magmatic event in South China
Authors
Keywordsadakitic magma
dating
granitoid
Neoproterozoic
South China
subduction
Issue Date2006
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/epsl
Citation
16th Annual V M Goldschmidt Conference. In Earth and Planetary Science Letters, v. 248 n. 1-2, p. 286-300 How to Cite?
AbstractThe Xuelongbao plutonic complex in the eastern margin of the Tibetan Plateau is dated at 748 ± 7 Ma using the SHRIMP zircon U-Pb method and represents part of the Neoproterozoic igneous assemblage of South China. Rocks in the complex include tonalite and granodiorite and have SiO 2 ranging from 62.0 to 74.8 wt.% and Al 2O 3 from 14.3 to 20.9 wt.%. Their Na 2O contents range from 4.2 to 6.7 wt.% and K 2O from 0.47 to 1.96 wt.%, indicating that they belong to the Na-series. These rocks show chondrite-normalized REE patterns depleted in HREE and variably enriched in LREE. They have positive Sr and negative Nb and Ti anomalies in the primitive mantle-normalized trace elemental spider diagram. Their Sr contents range from 320 to 780 ppm and Y contents are lower than 10 ppm, resulting in high Sr/Y ratios (52-320), characteristic of typical adakites. Their εNd (t) and initial Sr isotopic compositions range from + 0.36 to + 2.88 and from 0.7033 to 0.7054, respectively. The geochemical features of the Xuelongbao plutonic complex are consistent with an origin from adakitic magmas that were likely derived from partial melting of a subducted oceanic slab. Together with arc signatures of other granites and mafic intrusions in the region, the 750 Ma Xuelongbao adakitic complex provides evidence for a major, subduction-related Neoproterozoic magmatic event of South China. © 2006 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/73023
ISSN
2015 Impact Factor: 4.326
2015 SCImago Journal Rankings: 3.628
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZhou, MFen_HK
dc.contributor.authorYan, DPen_HK
dc.contributor.authorWang, CLen_HK
dc.contributor.authorQi, Len_HK
dc.contributor.authorKennedy, Aen_HK
dc.date.accessioned2010-09-06T06:47:19Z-
dc.date.available2010-09-06T06:47:19Z-
dc.date.issued2006en_HK
dc.identifier.citation16th Annual V M Goldschmidt Conference. In Earth and Planetary Science Letters, v. 248 n. 1-2, p. 286-300en_HK
dc.identifier.issn0012-821Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/73023-
dc.description.abstractThe Xuelongbao plutonic complex in the eastern margin of the Tibetan Plateau is dated at 748 ± 7 Ma using the SHRIMP zircon U-Pb method and represents part of the Neoproterozoic igneous assemblage of South China. Rocks in the complex include tonalite and granodiorite and have SiO 2 ranging from 62.0 to 74.8 wt.% and Al 2O 3 from 14.3 to 20.9 wt.%. Their Na 2O contents range from 4.2 to 6.7 wt.% and K 2O from 0.47 to 1.96 wt.%, indicating that they belong to the Na-series. These rocks show chondrite-normalized REE patterns depleted in HREE and variably enriched in LREE. They have positive Sr and negative Nb and Ti anomalies in the primitive mantle-normalized trace elemental spider diagram. Their Sr contents range from 320 to 780 ppm and Y contents are lower than 10 ppm, resulting in high Sr/Y ratios (52-320), characteristic of typical adakites. Their εNd (t) and initial Sr isotopic compositions range from + 0.36 to + 2.88 and from 0.7033 to 0.7054, respectively. The geochemical features of the Xuelongbao plutonic complex are consistent with an origin from adakitic magmas that were likely derived from partial melting of a subducted oceanic slab. Together with arc signatures of other granites and mafic intrusions in the region, the 750 Ma Xuelongbao adakitic complex provides evidence for a major, subduction-related Neoproterozoic magmatic event of South China. © 2006 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/epslen_HK
dc.relation.ispartofEarth and Planetary Science Lettersen_HK
dc.subjectadakitic magmaen_HK
dc.subjectdatingen_HK
dc.subjectgranitoiden_HK
dc.subjectNeoproterozoicen_HK
dc.subjectSouth Chinaen_HK
dc.subjectsubductionen_HK
dc.titleSubduction-related origin of the 750 Ma Xuelongbao adakitic complex (Sichuan Province, China): Implications for the tectonic setting of the giant Neoproterozoic magmatic event in South Chinaen_HK
dc.typeConference_Paperen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0012-821X&volume=248&issue=1-2&spage=286&epage=300&date=2006&atitle=Subduction-related+origin+of+the+750 Ma+Xuelongbao+adakitic+complex+(Sichuan+Province,+China):+implications+for+the+tectonic+setting+of+the+giant+Neoproterozoic+magmatic+event+in+South+Chinaen_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.epsl.2006.05.032en_HK
dc.identifier.scopuseid_2-s2.0-33746521878en_HK
dc.identifier.hkuros167283en_HK
dc.identifier.hkuros167287-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33746521878&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume248en_HK
dc.identifier.issue1-2en_HK
dc.identifier.spage286en_HK
dc.identifier.epage300en_HK
dc.identifier.isiWOS:000240851400024-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridZhou, MF=7403506005en_HK
dc.identifier.scopusauthoridYan, DP=36683417500en_HK
dc.identifier.scopusauthoridWang, CL=49161361600en_HK
dc.identifier.scopusauthoridQi, L=7202149924en_HK
dc.identifier.scopusauthoridKennedy, A=7401653640en_HK

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