Show simple item record

dc.contributor.authorChamberlain, Katy J.
dc.contributor.authorBarclay, Jenni
dc.contributor.authorPreece, Katie
dc.contributor.authorBrown, Richard J.
dc.contributor.authorMcIntosh, Iona
dc.contributor.authorEIMF
dc.date.accessioned2020-05-22T16:02:12Z
dc.date.available2020-05-22T16:02:12Z
dc.date.issued2020-05-05
dc.identifier.citationChamberlain, K. (2020). 'Deep and disturbed: conditions for formation and eruption of a mingled rhyolite at Ascension Island, south Atlantic'. Volcanica, 3(1), pp. 139 – 153en_US
dc.identifier.doi10.30909/vol.03.01.139153
dc.identifier.urihttp://hdl.handle.net/10545/624811
dc.description.abstractThe generation of felsic melts (through open or closed system processes) within ocean island volcanoes has been a key area of study since their identification. At Ascension Island in the south Atlantic, explosively erupted felsic melts have, to date, demonstrated a marked absence of signs of magma mixing and crustal assimilation. Here we present the first observations of a fall deposit from Ascension Island recording both macro- and micro-scale evidence for magma mingling. Geochemical analyses of mineral and glass phases, coupled with volatile concentrations of melt inclusions highlight the role of lower-crustal partial melting to produce rhyolitic magmas. Glass textures and the lack of zoning in major mineral phases indicate that mingling with a mafic melt occurred shortly prior to eruption. These inferences of a deep rhyolite production zone, coupled with rapid ascent rates highlight the challenges in forecasting a similar style of eruption at Ascension Island in the future.en_US
dc.description.sponsorshipThis project was funded by a Leverhulme Trust Research Project Grant (RPG-2013-042), with a field season supported by a Gloyne Outdoor Geological Research award from the Geological Society of London. Ion microprobe time was funded by the Natural Environment Research Council Grant (IMF561/0515).en_US
dc.language.isoenen_US
dc.publisherPresses universitaires de Strasbourgen_US
dc.relation.urlhttps://www.jvolcanica.org/ojs/index.php/volcanica/indexen_US
dc.relation.urlhttp://www.jvolcanica.org/ojs/index.php/volcanica/article/view/59en_US
dc.subjectMagma minglingen_US
dc.subjectAscension Islanden_US
dc.subjectCrustal meltingen_US
dc.subjectMagma genesisen_US
dc.titleDeep and disturbed: conditions for formation and eruption of a mingled rhyolite at Ascension Island, south Atlanticen_US
dc.typeArticleen_US
dc.typeDataseten_US
dc.identifier.eissn2610-3540
dc.contributor.departmentUniversity of Derbyen_US
dc.contributor.departmentUniversity of East Angliaen_US
dc.contributor.departmentSwansea Universityen_US
dc.contributor.departmentDurham Universityen_US
dc.contributor.departmentJAMSTECen_US
dc.contributor.departmentUniversity of Edinburghen_US
dc.identifier.journalVolcanicaen_US
dcterms.dateAccepted2020-03-17
refterms.dateFOA2020-05-22T16:02:13Z
dc.author.detail786068en_US


Files in this item

Thumbnail
Name:
Mingled_ElectonicAppendix1.xlsx
Size:
19.71Mb
Format:
PDF
Description:
Electronic Appendix
Thumbnail
Name:
Volcanica_Mingled_SubmittedRev ...
Size:
2.151Mb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record