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Article: The origin of oceanic plagiogranites from the karmoy ophiolite, western Norway

TitleThe origin of oceanic plagiogranites from the karmoy ophiolite, western Norway
Authors
Issue Date1984
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, 1984, v. 88 n. 1-2, p. 36-52 How to Cite?
AbstractBoth field relationships and geochemical characteristics indicate two suites of plagiogranitic and related rocks coexisting in the higher parts of the Karmoy ophiolite of western Norway. The plutonic zone of this ophiolite can be subdivided into three complexes; the East-Karmoy Igneous Complex, the Visnes High Level Complex and the Veavagen Igneous Complex and plagiogranitic rocks are well developed in the first two of these. Within the East-Karmoy Igneous Complex, plagiogranites are associated with high temperature, pre-basic dyke, shear zones. Rare earth element modelling indicates that these plagiogranites were derived by anatexis of amphibolite (hydrated diabase) assuming a starting material consisting of 40% hornblende and 60% plagioclase and that batch melting occurred within the stability field of hornblende. In comparison, plagiogranite occurs in a number of bodies in the upper part of the Visnes High Level Complex and forms a sandwich horizon together with biotite diorites and epidosites between a roof assemblage of dykes, microgabbros and magnetite gabbros, and a floor assemblage of layered and non-layered gabbros. The R.E.E. modelling of the petrogenesis of this series of plagiogranites indicates that they were derived by filter pressing of a differentiated interstitial liquid to the vari-textured gabbros, although the distribution of highly hygromagmatophile elements such as K, Rb, Ba, etc. cannot be explained satisfactorily by this model alone. Depletion in these elements appears to be an autometasomatic effect. © 1984 Springer-Verlag.
Persistent Identifierhttp://hdl.handle.net/10722/178149
ISSN
2015 Impact Factor: 3.218
2015 SCImago Journal Rankings: 2.582
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorPedersen, RBen_US
dc.contributor.authorMalpas, Jen_US
dc.date.accessioned2012-12-19T09:43:05Z-
dc.date.available2012-12-19T09:43:05Z-
dc.date.issued1984en_US
dc.identifier.citationContributions To Mineralogy And Petrology, 1984, v. 88 n. 1-2, p. 36-52en_US
dc.identifier.issn0010-7999en_US
dc.identifier.urihttp://hdl.handle.net/10722/178149-
dc.description.abstractBoth field relationships and geochemical characteristics indicate two suites of plagiogranitic and related rocks coexisting in the higher parts of the Karmoy ophiolite of western Norway. The plutonic zone of this ophiolite can be subdivided into three complexes; the East-Karmoy Igneous Complex, the Visnes High Level Complex and the Veavagen Igneous Complex and plagiogranitic rocks are well developed in the first two of these. Within the East-Karmoy Igneous Complex, plagiogranites are associated with high temperature, pre-basic dyke, shear zones. Rare earth element modelling indicates that these plagiogranites were derived by anatexis of amphibolite (hydrated diabase) assuming a starting material consisting of 40% hornblende and 60% plagioclase and that batch melting occurred within the stability field of hornblende. In comparison, plagiogranite occurs in a number of bodies in the upper part of the Visnes High Level Complex and forms a sandwich horizon together with biotite diorites and epidosites between a roof assemblage of dykes, microgabbros and magnetite gabbros, and a floor assemblage of layered and non-layered gabbros. The R.E.E. modelling of the petrogenesis of this series of plagiogranites indicates that they were derived by filter pressing of a differentiated interstitial liquid to the vari-textured gabbros, although the distribution of highly hygromagmatophile elements such as K, Rb, Ba, etc. cannot be explained satisfactorily by this model alone. Depletion in these elements appears to be an autometasomatic effect. © 1984 Springer-Verlag.en_US
dc.languageengen_US
dc.publisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00410/index.htmen_US
dc.relation.ispartofContributions to Mineralogy and Petrologyen_US
dc.titleThe origin of oceanic plagiogranites from the karmoy ophiolite, western Norwayen_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.doi10.1007/BF00371410en_US
dc.identifier.scopuseid_2-s2.0-0021336050en_US
dc.identifier.volume88en_US
dc.identifier.issue1-2en_US
dc.identifier.spage36en_US
dc.identifier.epage52en_US
dc.identifier.isiWOS:A1984ACV1300004-
dc.publisher.placeGermanyen_US
dc.identifier.scopusauthoridPedersen, RB=7101996213en_US
dc.identifier.scopusauthoridMalpas, J=7006136845en_US

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