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Article: The dynamothermal aureole of the Donqiao ophiolite (northern Tibet)

TitleThe dynamothermal aureole of the Donqiao ophiolite (northern Tibet)
Authors
KeywordsEarth sciences
Issue Date1997
PublisherN R C Research Press. The Journal's web site is located at http://www.nrc.ca/cgi-bin/cisti/journals/rp/rp2_desc_e?cjes
Citation
Canadian Journal Of Earth Sciences, 1997, v. 34 n. 1, p. 59-65 How to Cite?
AbstractMetamorphic rocks found at the base of the Jurassic Donqiao ophiolite of northern Tibet are interpreted as a basal dynamothermal aureole produced during obduction of the massif. The rocks form a sequence some 8 m thick, varying from high-grade amphibolites at the contact with overlying harzburgites to greenschist facies metasedimentary rocks lower down. The mineral paragenesis is similar to other such aureoles, and indicates that temperatures in excess of 750°C may have been reached during metamorphism. The lack of high-pressure minerals suggests that the rocks were produced by subcretion in a relatively shallow dipping subduction zone. Ar-Ar geochronology on amphibole separates provides dates of 175-180 Ma for the displacement of the ophiolite, significantly older than the age of emplacement estimated from stratigraphic relationships. The ophiolite was clearly obducted very soon after its formation in a suprasubduction zone environment.
Persistent Identifierhttp://hdl.handle.net/10722/42091
ISSN
2015 Impact Factor: 1.19
2015 SCImago Journal Rankings: 0.811
References

 

DC FieldValueLanguage
dc.contributor.authorZhou, MFen_HK
dc.contributor.authorMalpas, Jen_HK
dc.contributor.authorRobinson, PTen_HK
dc.contributor.authorReynolds, PHen_HK
dc.date.accessioned2007-01-08T02:28:44Z-
dc.date.available2007-01-08T02:28:44Z-
dc.date.issued1997en_HK
dc.identifier.citationCanadian Journal Of Earth Sciences, 1997, v. 34 n. 1, p. 59-65en_HK
dc.identifier.issn0008-4077en_HK
dc.identifier.urihttp://hdl.handle.net/10722/42091-
dc.description.abstractMetamorphic rocks found at the base of the Jurassic Donqiao ophiolite of northern Tibet are interpreted as a basal dynamothermal aureole produced during obduction of the massif. The rocks form a sequence some 8 m thick, varying from high-grade amphibolites at the contact with overlying harzburgites to greenschist facies metasedimentary rocks lower down. The mineral paragenesis is similar to other such aureoles, and indicates that temperatures in excess of 750°C may have been reached during metamorphism. The lack of high-pressure minerals suggests that the rocks were produced by subcretion in a relatively shallow dipping subduction zone. Ar-Ar geochronology on amphibole separates provides dates of 175-180 Ma for the displacement of the ophiolite, significantly older than the age of emplacement estimated from stratigraphic relationships. The ophiolite was clearly obducted very soon after its formation in a suprasubduction zone environment.en_HK
dc.format.extent4800499 bytes-
dc.format.extent2585 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypetext/plain-
dc.languageengen_HK
dc.publisherN R C Research Press. The Journal's web site is located at http://www.nrc.ca/cgi-bin/cisti/journals/rp/rp2_desc_e?cjesen_HK
dc.relation.ispartofCanadian Journal of Earth Sciencesen_HK
dc.rightsCanadian Journal of Earth Sciences. Copyright © N R C Research Press.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectEarth sciencesen_HK
dc.titleThe dynamothermal aureole of the Donqiao ophiolite (northern Tibet)en_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0008-4077&volume=34&issue=1&spage=59&epage=65&date=1997&atitle=The+dynamothermal+aureole+of+the+Donqiao+ophiolite+(northern+Tibet)en_HK
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_HK
dc.identifier.scopuseid_2-s2.0-0006951895en_HK
dc.identifier.hkuros23034-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0006951895&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume34en_HK
dc.identifier.issue1en_HK
dc.identifier.spage59en_HK
dc.identifier.epage65en_HK
dc.publisher.placeCanadaen_HK
dc.identifier.scopusauthoridZhou, MF=7403506005en_HK
dc.identifier.scopusauthoridMalpas, J=7006136845en_HK
dc.identifier.scopusauthoridRobinson, PT=7403720506en_HK
dc.identifier.scopusauthoridReynolds, PH=7201378946en_HK

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