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Article: Significance of palaeomagnetic data from the oceanic Poya Terrane, New Caledonia, for SW Pacific tectonic models

TitleSignificance of palaeomagnetic data from the oceanic Poya Terrane, New Caledonia, for SW Pacific tectonic models
Authors
KeywordsIndo-Australian Plate
New Caledonia
Pacific Ocean
Paleomagnetism
Plate tectonics
Issue Date2000
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/epsl
Citation
Earth And Planetary Science Letters, 2000, v. 177 n. 3-4, p. 153-161 How to Cite?
AbstractResults from a palaeomagnetic study of pillow basalts and associated pelagic sediments of the Late Cretaceous-Palaeocene Poya Terrane of New Caledonia are presented. The Poya Terrane forms a nappe that was thrust SW over the island, i.e. the Pacific side, in the middle Eocene. Data from four outcrops (nine sites), spread over 250 km, yield a normal polarity tilt-corrected mean inclination of -57.2°, where α95=11.2°and κ = 67.4, which suggests formation at 37.8°(± 12.1°) S. The between-outcrop declinations are, unfortunately, too scattered to be used in regional tectonic discussion; they indicate rotations that are localised and sometimes very large. Following reference to SW Pacific Late Cretaceous-Palaeogene plate tectonic reconstructions, the inclination data suggest that the Poya Terrane formed close to the New Caledonian portion of the Indo-Australia plate. This interpretation is consistent with tectonic models where the Poya Terrane is generated in a marginal basin immediately to the northeast of New Caledonian during the break-up of east Gondwana. The terrane was thrust over New Caledonia in the middle Eocene, possibly in response to a change in relative motion of the Australian and Pacific plates at about this time. A short time later it was overthrust by a supra-subduction zone ultramafic nappe and together they have since drifted northwards as passengers on the Australia Plate. (C) 2000 Elsevier Science B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/151036
ISSN
2015 Impact Factor: 4.326
2015 SCImago Journal Rankings: 3.628
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorAli, JRen_HK
dc.contributor.authorAitchison, JCen_HK
dc.date.accessioned2012-06-26T06:16:22Z-
dc.date.available2012-06-26T06:16:22Z-
dc.date.issued2000en_HK
dc.identifier.citationEarth And Planetary Science Letters, 2000, v. 177 n. 3-4, p. 153-161en_HK
dc.identifier.issn0012-821Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/151036-
dc.description.abstractResults from a palaeomagnetic study of pillow basalts and associated pelagic sediments of the Late Cretaceous-Palaeocene Poya Terrane of New Caledonia are presented. The Poya Terrane forms a nappe that was thrust SW over the island, i.e. the Pacific side, in the middle Eocene. Data from four outcrops (nine sites), spread over 250 km, yield a normal polarity tilt-corrected mean inclination of -57.2°, where α95=11.2°and κ = 67.4, which suggests formation at 37.8°(± 12.1°) S. The between-outcrop declinations are, unfortunately, too scattered to be used in regional tectonic discussion; they indicate rotations that are localised and sometimes very large. Following reference to SW Pacific Late Cretaceous-Palaeogene plate tectonic reconstructions, the inclination data suggest that the Poya Terrane formed close to the New Caledonian portion of the Indo-Australia plate. This interpretation is consistent with tectonic models where the Poya Terrane is generated in a marginal basin immediately to the northeast of New Caledonian during the break-up of east Gondwana. The terrane was thrust over New Caledonia in the middle Eocene, possibly in response to a change in relative motion of the Australian and Pacific plates at about this time. A short time later it was overthrust by a supra-subduction zone ultramafic nappe and together they have since drifted northwards as passengers on the Australia Plate. (C) 2000 Elsevier Science B.V. All rights reserved.en_HK
dc.languageengen_US
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.rightsEarth and Planetary Science Letters. Copyright © Elsevier BV.-
dc.subjectIndo-Australian Plateen_HK
dc.subjectNew Caledoniaen_HK
dc.subjectPacific Oceanen_HK
dc.subjectPaleomagnetismen_HK
dc.subjectPlate tectonicsen_HK
dc.titleSignificance of palaeomagnetic data from the oceanic Poya Terrane, New Caledonia, for SW Pacific tectonic modelsen_HK
dc.typeArticleen_HK
dc.identifier.emailAli, JR: jrali@hku.hken_HK
dc.identifier.emailAitchison, JC: jona@hku.hken_HK
dc.identifier.authorityAli, JR=rp00659en_HK
dc.identifier.authorityAitchison, JC=rp00658en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/S0012-821X(00)00042-Xen_HK
dc.identifier.scopuseid_2-s2.0-0034032216en_HK
dc.identifier.hkuros55605-
dc.identifier.hkuros57571-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0034032216&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume177en_HK
dc.identifier.issue3-4en_HK
dc.identifier.spage153en_HK
dc.identifier.epage161en_HK
dc.identifier.isiWOS:000086807100003-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridAli, JR=7102266465en_HK
dc.identifier.scopusauthoridAitchison, JC=7102533858en_HK

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