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Deep-sea fragmentation style of Havre revealed by dendrogrammatic analyses of particle morphometry

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dc.contributor Háskóli Íslands
dc.contributor University of Iceland
dc.contributor.author Dürig, Tobias
dc.contributor.author White, J. D. L.
dc.contributor.author Zimanowski, B.
dc.contributor.author Büttner, R.
dc.contributor.author Murch, A.
dc.contributor.author Carey, R. J.
dc.date.accessioned 2020-12-08T12:49:09Z
dc.date.available 2020-12-08T12:49:09Z
dc.date.issued 2020-09-30
dc.identifier.citation Dürig, T., White, J.D.L., Zimanowski, B. et al. Deep-sea fragmentation style of Havre revealed by dendrogrammatic analyses of particle morphometry. Bull Volcanol 82, 67 (2020). https://doi.org/10.1007/s00445-020-01408-1
dc.identifier.issn 0258-8900
dc.identifier.issn 1432-0819 (eISSN)
dc.identifier.uri https://hdl.handle.net/20.500.11815/2285
dc.description.abstract In 2012, the eruption of deep-sea volcano Havre produced an abundance of fine ash at a depth of ~ 1000 m below sea level. In this study the 2D shapes of Havre ash grains retrieved from the seafloor were compared quantitatively with those of particles generated in a suite of different fragmentation experiments, which used remelted rhyolitic rock and pumice from the eruption site. A new statistical data analysis technique, denoted as Dendrogrammatic Analysis of Particle Morphology (DAPM) is introduced. It is designed to compare large numbers of morphometric data sets containing shape information for a set of ash particles to group them by morphological similarities and to visualize these clusters in a dendrogram. Further steps involve t tests and equivalence tests and reveal morphometric differences as well as matching features. The DAPM suggests that the majority of Havre ash was thermohydraulically produced by induced fuel coolant-interaction. A subset of ash particles features an elongated tube morphology. Their morphometry matches that of particles that were experimentally produced by a combination of shearing and quenching, and we infer that the natural particles were formed by synextrusive ash-venting.
dc.description.sponsorship This study was supported by MARSDEN grant U001616; Havre samples were obtained with NSF funding EAR1447559. T.D. is supported by the Icelandic Research Fund (Rannís) Grant Nr. 206527-051. R.J.C. was funded by Australian Research Council grants DP110102196 and DE150101190, and by US National Science Foundation grant OCE1357443.
dc.format.extent 67
dc.language.iso en
dc.publisher Springer Science and Business Media LLC
dc.relation.ispartofseries Bulletin of Volcanology;82(10)
dc.rights info:eu-repo/semantics/openAccess
dc.subject Volcanology
dc.subject Tephra
dc.subject Particle morphometry
dc.subject Geosciences
dc.subject SEM microscopy
dc.subject Eldfjallafræði
dc.subject Gjóska
dc.title Deep-sea fragmentation style of Havre revealed by dendrogrammatic analyses of particle morphometry
dc.type info:eu-repo/semantics/article
dc.description.version Peer Reviewed
dc.identifier.journal Bulletin of Volcanology
dc.identifier.doi 10.1007/s00445-020-01408-1
dc.contributor.department Jarðvísindastofnun (HÍ)
dc.contributor.department Institute of Earth Sciences (UI)
dc.contributor.school School of Engineering and Natural Sciences (UI)
dc.contributor.school Verkfræði- og náttúruvísindasvið (HÍ)

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