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Article: The volcanic stratigraphy and petrogenesis of the Oman ophiolite complex

TitleThe volcanic stratigraphy and petrogenesis of the Oman ophiolite complex
Authors
Issue Date1982
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, 1982, v. 81 n. 3, p. 168-183 How to Cite?
AbstractThe volcanic stratigraphy and trace element geochemistry of the Oman ophiolite complex indicate a multistage magmatic origin comprising: (1) magmatism due to sea-floor spreading in a marginal basin; (2) magmatism associated with discrete submarine volcanic centres or seamounts; (3) magmatism associated with crustal uplift and rifting; and (4) magmatism associated with continent-arc collision. Trace element petrogenetic modelling is used to investigate the nature of the mantle source region and the partial melting and fractional crystallization history for each magmatic event. The petrogenetic pathway for the 'sea-floor spreading' lavas requires a high degree of melting of a mantle that was depleted in incompatible elements prior to subduction but subsequently selectively enriched in certain elements (mostly LIL elements and H2O) from an underlying subduction zone; it also requires magma mixing in an 'open system' magma chamber prior to eruption. The 'seamount' lavas were probably derived by a similar degree of partial melting of a similar source, but fractional crystallization was restricted to smaller high-level magma chambers. The 'rifting' lavas were derived from a mantle source that was more depleted than the 'seamount' lavas prior to subduction but which was later modified by a larger subduction zone component. The 'syn-collision' lavas were however derived from an enriched mantle source, which probably underlay the passive continental margin rather than the marginal basin complex. Results such as these may provide considerable insight into the petrogenetic changes accompanying the transitions from spreading to arc volcanism in a supra-subduction zone setting. © 1982 Springer-Verlag.
Persistent Identifierhttp://hdl.handle.net/10722/178130
ISSN
2015 Impact Factor: 3.218
2015 SCImago Journal Rankings: 2.582
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorAlabaster, Ten_US
dc.contributor.authorPearce, JAen_US
dc.contributor.authorMalpas, Jen_US
dc.date.accessioned2012-12-19T09:43:02Z-
dc.date.available2012-12-19T09:43:02Z-
dc.date.issued1982en_US
dc.identifier.citationContributions To Mineralogy And Petrology, 1982, v. 81 n. 3, p. 168-183en_US
dc.identifier.issn0010-7999en_US
dc.identifier.urihttp://hdl.handle.net/10722/178130-
dc.description.abstractThe volcanic stratigraphy and trace element geochemistry of the Oman ophiolite complex indicate a multistage magmatic origin comprising: (1) magmatism due to sea-floor spreading in a marginal basin; (2) magmatism associated with discrete submarine volcanic centres or seamounts; (3) magmatism associated with crustal uplift and rifting; and (4) magmatism associated with continent-arc collision. Trace element petrogenetic modelling is used to investigate the nature of the mantle source region and the partial melting and fractional crystallization history for each magmatic event. The petrogenetic pathway for the 'sea-floor spreading' lavas requires a high degree of melting of a mantle that was depleted in incompatible elements prior to subduction but subsequently selectively enriched in certain elements (mostly LIL elements and H2O) from an underlying subduction zone; it also requires magma mixing in an 'open system' magma chamber prior to eruption. The 'seamount' lavas were probably derived by a similar degree of partial melting of a similar source, but fractional crystallization was restricted to smaller high-level magma chambers. The 'rifting' lavas were derived from a mantle source that was more depleted than the 'seamount' lavas prior to subduction but which was later modified by a larger subduction zone component. The 'syn-collision' lavas were however derived from an enriched mantle source, which probably underlay the passive continental margin rather than the marginal basin complex. Results such as these may provide considerable insight into the petrogenetic changes accompanying the transitions from spreading to arc volcanism in a supra-subduction zone setting. © 1982 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 volcanic stratigraphy and petrogenesis of the Oman ophiolite complexen_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/BF00371294en_US
dc.identifier.scopuseid_2-s2.0-0019925538en_US
dc.identifier.volume81en_US
dc.identifier.issue3en_US
dc.identifier.spage168en_US
dc.identifier.epage183en_US
dc.identifier.isiWOS:A1982QC81800002-
dc.publisher.placeGermanyen_US
dc.identifier.scopusauthoridAlabaster, T=6603353753en_US
dc.identifier.scopusauthoridPearce, JA=7402030396en_US
dc.identifier.scopusauthoridMalpas, J=7006136845en_US

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