Erebus Volcanic Province: petrology

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dc.contributor.authorMartin, Adam P.
dc.contributor.authorCooper, Alan F.
dc.contributor.authorPrice, Richard C.
dc.contributor.authorKyle, Philip R.
dc.contributor.authorGamble, John A.
dc.contributor.funderAntarctica New Zealanden
dc.date.accessioned2021-05-31T09:16:17Z
dc.date.available2021-05-31T09:16:17Z
dc.date.issued2021-02-09
dc.date.updated2021-05-31T08:48:00Z
dc.description.abstractIgneous rocks of the Erebus Volcanic Province have been investigated for more than a century but many aspects of petrogenesis remain problematic. Current interpretations are assessed and summarized using a comprehensive dataset of previously published and new geochemical and geochronological data. Igneous rocks, ranging in age from 25 Ma to the present day, are mainly nepheline normative. Compositional variation is largely controlled by fractionation of olivine + clinopyroxene + magnetite/ilmenite + titanite ± kaersutite ± feldspar, with relatively undifferentiated melts being generated by <10% partial melting of a mixed spinel + garnet lherzolite source. Equilibration of radiogenic Sr, Nd, Pb and Hf is consistent with a high time-integrated HIMU sensu stricto source component and this is unlikely to be related to subduction of the palaeo-Pacific Plate around 0.5 Ga. Relatively undifferentiated whole-rock chemistry can be modelled to infer complex sources comprising depleted and enriched peridotite, HIMU, eclogite-like and carbonatite-like components. Spatial (west–east) variations in Sr, Nd and Pb isotopic compositions and Ba/Rb and Nb/Ta ratios can be interpreted to indicate increasing involvement of an eclogitic crustal component eastwards. Melting in the region is related to decompression, possibly from edge-driven mantle convection or a mantle plume.en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationMartin, A. P., Cooper, A. F., Price, R. C., Kyle, P. R. and Gamble, J. A. (2021) 'Erebus Volcanic Province: petrology', Geological Society, London, Memoirs, 55, pp. 447-489. doi: 10.1144/M55-2018-80en
dc.identifier.doi10.1144/M55-2018-80en
dc.identifier.endpage489en
dc.identifier.isbn978-1-78620-536-0
dc.identifier.issn0435-4052
dc.identifier.journaltitleGeological Society, London, Memoirsen
dc.identifier.startpage447en
dc.identifier.urihttps://hdl.handle.net/10468/11409
dc.identifier.volume55en
dc.language.isoenen
dc.publisherGeological Society of Londonen
dc.relation.urihttps://doi.org/10.6084/m9.figshare.c.5199416
dc.rights© 2021, the Authors. Published by The Geological Society of London. All rights reserved.en
dc.subjectIgneous rocksen
dc.subjectErebus Volcanic Provinceen
dc.subjectPetrogenesisen
dc.titleErebus Volcanic Province: petrologyen
dc.typeArticle (peer-reviewed)en
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