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Article: Northland ophiolite, New Zealand, and implications for plate- tectonic evolution of the southwest Pacific

TitleNorthland ophiolite, New Zealand, and implications for plate- tectonic evolution of the southwest Pacific
Authors
Issue Date1992
PublisherGeological Society of America. The Journal's web site is located at http://www.geosociety.org/pubs/
Citation
Geology, 1992, v. 20 n. 2, p. 149-152 How to Cite?
AbstractThe Northland ophiolite and coeval ocean-floor sedimentary rock form the Northland allochthon obducted from the northeast onto New Zealand in the late Oligocene. The ophiolite was probably emplaced as a single sheet and separated into individual massifs during subsequent movement of the allochthon. Chemically, the bulk of the igneous rocks are normal mid-ocean-ridge basalts, but the ophiolite also includes a younger suite of hornblende modal within-plate alkalic rocks believed to represent seamounts. Two alternative models, one involving a subduction flip, the other involving continuous westward subduction, are proposed to account for the obduction of the upper part of the Northland ophiolite. The oceanic crust from which the ophiolite originated was formed simultaneously with Tasman Sea spreading on the western rim of a once much larger South Fiji plate assemblage. -Authors
Persistent Identifierhttp://hdl.handle.net/10722/178187
ISSN
2015 Impact Factor: 4.548
2015 SCImago Journal Rankings: 3.278

 

DC FieldValueLanguage
dc.contributor.authorMalpas, Jen_US
dc.contributor.authorSporli, KBen_US
dc.contributor.authorBlack, PMen_US
dc.contributor.authorSmith, IEMen_US
dc.date.accessioned2012-12-19T09:43:18Z-
dc.date.available2012-12-19T09:43:18Z-
dc.date.issued1992en_US
dc.identifier.citationGeology, 1992, v. 20 n. 2, p. 149-152en_US
dc.identifier.issn0091-7613en_US
dc.identifier.urihttp://hdl.handle.net/10722/178187-
dc.description.abstractThe Northland ophiolite and coeval ocean-floor sedimentary rock form the Northland allochthon obducted from the northeast onto New Zealand in the late Oligocene. The ophiolite was probably emplaced as a single sheet and separated into individual massifs during subsequent movement of the allochthon. Chemically, the bulk of the igneous rocks are normal mid-ocean-ridge basalts, but the ophiolite also includes a younger suite of hornblende modal within-plate alkalic rocks believed to represent seamounts. Two alternative models, one involving a subduction flip, the other involving continuous westward subduction, are proposed to account for the obduction of the upper part of the Northland ophiolite. The oceanic crust from which the ophiolite originated was formed simultaneously with Tasman Sea spreading on the western rim of a once much larger South Fiji plate assemblage. -Authorsen_US
dc.languageengen_US
dc.publisherGeological Society of America. The Journal's web site is located at http://www.geosociety.org/pubs/en_US
dc.relation.ispartofGeologyen_US
dc.titleNorthland ophiolite, New Zealand, and implications for plate- tectonic evolution of the southwest Pacificen_US
dc.typeArticleen_US
dc.identifier.emailMalpas, J: jgmalpas@hku.hken_US
dc.identifier.authorityMalpas, J=rp00059en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-84879890459en_US
dc.identifier.volume20en_US
dc.identifier.issue2en_US
dc.identifier.spage149en_US
dc.identifier.epage152en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridMalpas, J=7006136845en_US
dc.identifier.scopusauthoridSporli, KB=6602968747en_US
dc.identifier.scopusauthoridBlack, PM=7401834617en_US
dc.identifier.scopusauthoridSmith, IEM=7404425799en_US

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