File Download
  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Heterogeneous mantle source and magma differentiation of quaternary arc-like volcanic rocks from Tengchong, SE margin of the Tibetan Plateau

TitleHeterogeneous mantle source and magma differentiation of quaternary arc-like volcanic rocks from Tengchong, SE margin of the Tibetan Plateau
Authors
KeywordsArc-like volcanic rocks
Heterogeneous mantle source
Magma chamber processes
SE margin of the Tibetan Plateau
Sr-Nd-Pb-Hf isotopes
Tengchong
Issue Date2012
PublisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00410/index.htm
Citation
Contributions To Mineralogy And Petrology, 2012, v. 163 n. 5, p. 841-860 How to Cite?
AbstractThe Tengchong volcanic field north of the Burma arc comprises numerous Quaternary volcanoes in the southeastern margin of the Tibetan Plateau. The volcanic rocks are grouped into four units (1-4) from the oldest to youngest. Units 1, 3 and 4 are composed of olivine trachybasalt, basaltic trachyandesite and trachyandesite, and Unit 2 consists of hornblende dacite. The rocks of Units 1, 3, and 4 form a generally alkaline suite in which the rocks plot along generally linear trends on Harker diagrams with only slight offset from unit to unit. They contain olivine phenocrysts with Fo values ranging from 65 to 85 mol% and have Cr-spinel with Cr# ranging from 23 to 35. All the rocks have chondrite-normalized REE patterns enriched in LREE and primitive mantle-normalized trace element patterns depleted in Ti, Nb and Ta, but they are rich in Th, Ti and P relative to typical arc volcanics. Despite minor crustal contamination, 87Sr/ 86Sr ratios (0.706-0.709), εNd values (-3.2 to -8.7), and εHf values (+4.8 to -6.4) indicate a highly heterogeneous mantle source. The Pb isotopic ratios of the lavas ( 206Pb/ 204Pb = 18.02-18.30) clearly show an EMI-type mantle source. The underlying mantle source was previously modified by subduction of the Neo-Tethyan oceanic and Indian continental lithosphere. The present heterogeneous mantle source is interpreted to have formed by variable additions of fluids and sediments derived from the subducted Indian Oceanic lithosphere, probably the Ninety East Ridge. Magma generation and emplacement was facilitated by transtensional NS-trending strike-slip faulting. © 2011 The Author(s).
Persistent Identifierhttp://hdl.handle.net/10722/147121
ISSN
2015 Impact Factor: 3.218
2015 SCImago Journal Rankings: 2.582
ISI Accession Number ID
Funding AgencyGrant Number
State Key Laboratory of Ore Deposit Geochemistry
Institute of Geochemistry
Chinese Academy of Sciences200802
National Natural Science Foundation of China41172191
CAS
CAS/SAFEAKZCX2-YW-t004
Funding Information:

Support from research grants from the State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences (200802) to MFZ, National Natural Science Foundation of China (41172191) to DPY, CAS Hundred Talents projects to CYW, and a CAS/SAFEA International Partnership Program for Creative Research Teams (KZCX2-YW-t004), are gratefully acknowledged. Field assistance was provided by Xu Zhangbao from the Yunnan Geological Survey. We thank two anonymous referees for helpful reviews.

References

 

DC FieldValueLanguage
dc.contributor.authorZhou, MFen_HK
dc.contributor.authorRobinson, PTen_HK
dc.contributor.authorWang, CYen_HK
dc.contributor.authorZhao, JHen_HK
dc.contributor.authorYan, DPen_HK
dc.contributor.authorGao, JFen_HK
dc.contributor.authorMalpas, Jen_HK
dc.date.accessioned2012-05-28T08:18:54Z-
dc.date.available2012-05-28T08:18:54Z-
dc.date.issued2012en_HK
dc.identifier.citationContributions To Mineralogy And Petrology, 2012, v. 163 n. 5, p. 841-860en_HK
dc.identifier.issn0010-7999en_HK
dc.identifier.urihttp://hdl.handle.net/10722/147121-
dc.description.abstractThe Tengchong volcanic field north of the Burma arc comprises numerous Quaternary volcanoes in the southeastern margin of the Tibetan Plateau. The volcanic rocks are grouped into four units (1-4) from the oldest to youngest. Units 1, 3 and 4 are composed of olivine trachybasalt, basaltic trachyandesite and trachyandesite, and Unit 2 consists of hornblende dacite. The rocks of Units 1, 3, and 4 form a generally alkaline suite in which the rocks plot along generally linear trends on Harker diagrams with only slight offset from unit to unit. They contain olivine phenocrysts with Fo values ranging from 65 to 85 mol% and have Cr-spinel with Cr# ranging from 23 to 35. All the rocks have chondrite-normalized REE patterns enriched in LREE and primitive mantle-normalized trace element patterns depleted in Ti, Nb and Ta, but they are rich in Th, Ti and P relative to typical arc volcanics. Despite minor crustal contamination, 87Sr/ 86Sr ratios (0.706-0.709), εNd values (-3.2 to -8.7), and εHf values (+4.8 to -6.4) indicate a highly heterogeneous mantle source. The Pb isotopic ratios of the lavas ( 206Pb/ 204Pb = 18.02-18.30) clearly show an EMI-type mantle source. The underlying mantle source was previously modified by subduction of the Neo-Tethyan oceanic and Indian continental lithosphere. The present heterogeneous mantle source is interpreted to have formed by variable additions of fluids and sediments derived from the subducted Indian Oceanic lithosphere, probably the Ninety East Ridge. Magma generation and emplacement was facilitated by transtensional NS-trending strike-slip faulting. © 2011 The Author(s).en_HK
dc.languageengen_US
dc.publisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00410/index.htmen_HK
dc.relation.ispartofContributions to Mineralogy and Petrologyen_HK
dc.rightsThe Author(s)en_US
dc.rightsCreative Commons: Attribution 3.0 Hong Kong Licenseen_US
dc.subjectArc-like volcanic rocksen_HK
dc.subjectHeterogeneous mantle sourceen_HK
dc.subjectMagma chamber processesen_HK
dc.subjectSE margin of the Tibetan Plateauen_HK
dc.subjectSr-Nd-Pb-Hf isotopesen_HK
dc.subjectTengchongen_HK
dc.titleHeterogeneous mantle source and magma differentiation of quaternary arc-like volcanic rocks from Tengchong, SE margin of the Tibetan Plateauen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://www.springerlink.com/link-out/?id=2104&code=J175154718L28GV1&MUD=MPen_US
dc.identifier.emailZhou, MF: mfzhou@hkucc.hku.hken_HK
dc.identifier.emailMalpas, J: jgmalpas@hku.hken_HK
dc.identifier.authorityZhou, MF=rp00844en_HK
dc.identifier.authorityMalpas, J=rp00059en_HK
dc.description.naturepublished_or_final_versionen_US
dc.identifier.doi10.1007/s00410-011-0702-8en_HK
dc.identifier.scopuseid_2-s2.0-84859726759en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84859726759&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume163en_HK
dc.identifier.issue5en_HK
dc.identifier.spage841en_HK
dc.identifier.epage860en_HK
dc.identifier.eissn1432-0967en_US
dc.identifier.isiWOS:000302816200006-
dc.publisher.placeGermanyen_HK
dc.description.otherSpringer Open Choice, 28 May 2012en_US
dc.identifier.scopusauthoridZhou, MF=7403506005en_HK
dc.identifier.scopusauthoridRobinson, PT=7403720506en_HK
dc.identifier.scopusauthoridWang, CY=34976092700en_HK
dc.identifier.scopusauthoridZhao, JH=49061691300en_HK
dc.identifier.scopusauthoridYan, DP=36683417500en_HK
dc.identifier.scopusauthoridGao, JF=25638167000en_HK
dc.identifier.scopusauthoridMalpas, J=7006136845en_HK
dc.identifier.citeulike10003963-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats