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dc.contributor.authorConway, Chris
dc.contributor.authorChamberlain, Katy J.
dc.contributor.authorHarigane, Yumiko
dc.contributor.authorMorgan, Daniel
dc.contributor.authorWilson, Colin
dc.date.accessioned2020-06-29T07:58:00Z
dc.date.available2020-06-29T07:58:00Z
dc.date.issued2020-06-25
dc.identifier.citationChamberlain, K. (2020). 'Rapid assembly of high-Mg andesites and dacites by magma mixing at a continental arc stratovolcano'. Geology, pp. 1-5.en_US
dc.identifier.issn0091-7613
dc.identifier.doi10.1130/G47614.1
dc.identifier.urihttp://hdl.handle.net/10545/624941
dc.description.abstractStudies of pre-eruptive processes at active volcanoes require precise petrochronological constraints if they are to contribute to hazard assessment during future eruption events. We present petrological and geochemical data, and orthopyroxene diffusion timescales for samples from late Pleistocene high-Mg andesite dacite lavas (Mg#53–69) at Ruapehu volcano, New Zealand, as a case study of rapid magma genesis and eruption at a continental arc stratovolcano. Assembly of Ruapehu high-Mg magmas involved the mixing of primitive magmas plus entrained mantle equilibrated olivines with mid-crustal felsic mush bodies, yielding hybridized magmas with ubiquitous pyroxene reverse-zoning patterns. Orthopyroxene Fe-Mg interdiffusion timescales linked to quantitative crystal orientation data show that most lavas erupted <10 days after resumption of crystal growth following magma mixing events. The eruption of lavas within days of mixing events implies that pre-eruptive warnings may be correspondingly short.en_US
dc.description.sponsorshipCC was supported by postdoctoral research fellowship (P16788) and start-up (19K23471) grants from the Japan Society for the Promotion of Science (JSPS). KC was supported by JSPS grant PE16724.en_US
dc.language.isoenen_US
dc.publisherThe Geological Society of Americaen_US
dc.relation.urlhttps://pubs.geoscienceworld.org/gsa/geology/article/doi/10.1130/G47614.1/587599/Rapid-assembly-of-high-Mg-andesites-and-dacites-byen_US
dc.subjectmagmatismen_US
dc.subjectvolcanologyen_US
dc.subjectRuapehu volcanoen_US
dc.titleRapid assembly of high-Mg andesites and dacites by magma mixing at a continental arc stratovolcanoen_US
dc.typeArticleen_US
dc.identifier.eissn1943-2682
dc.contributor.departmentResearch Institute of Earthquake and Volcano Geology, Japanen_US
dc.contributor.departmentNational Museum of Nature and Science, Japanen_US
dc.contributor.departmentUniversity of Derbyen_US
dc.contributor.departmentUniversity of Leedsen_US
dc.contributor.departmentVictoria University of Wellingtonen_US
dc.identifier.journalGeologyen_US
dcterms.dateAccepted2020-05-27
dc.author.detail786068en_US


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