August 24, 2022 Journal article Open Access

Michael R Hudak; Maureen D Feineman; Peter C LaFemina; Halldór Geirsson; Samuele Agostini

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{
  "@context": "https://schema.org/", 
  "@id": "https://doi.org/10.30909/vol.05.02.249270", 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "name": "Michael R Hudak"
    }, 
    {
      "@type": "Person", 
      "name": "Maureen D Feineman"
    }, 
    {
      "@type": "Person", 
      "name": "Peter C LaFemina"
    }, 
    {
      "@type": "Person", 
      "name": "Halld\u00f3r Geirsson"
    }, 
    {
      "@type": "Person", 
      "name": "Samuele Agostini"
    }
  ], 
  "datePublished": "2022-08-24", 
  "description": "Thr\u00edhn\u00fakag\u00edgur Volcano, Iceland, is a composite spatter cone and lava field characteristic of basaltic fissure eruptions. Lava\u00a0drainback at the end of the eruption left ~60 m of evacuated conduit, and a 4\u00a0\u00d7\u00a0104 m3 cave formed by the erosion of unconsolidated\u00a0tephra by the feeder dike. Field relationships within the shallow plumbing system provide three-dimensional insight\u00a0into conduit formation in fissure systems. Petrographic estimates and the relative volumes of the cave and erupted lavas both\u00a0indicate xenolithic tephra comprises 5\u201310 % of the erupted volume, which cannot be reproduced by geochemical mixing models.\u00a0Although crustal xenolith entrainment is not geochemically significant, we posit that this process may be common in the\u00a0Icelandic crust. The Thr\u00edhn\u00fakag\u00edgur eruption illustrates how pervasive, poorly consolidated tephra or hyaloclastite can act as a\u00a0mechanically weak pre-existing structure that provides a preferential pathway for magma ascent and may influence vent location.", 
  "headline": "Conduit formation and crustal microxenolith entrainment in a basaltic fissure eruption: Observations from Thr\u00edhn\u00fakag\u00edgur Volcano, Iceland", 
  "identifier": "https://doi.org/10.30909/vol.05.02.249270", 
  "image": "https://zenodo.org/static/img/logos/zenodo-gradient-round.svg", 
  "inLanguage": {
    "@type": "Language", 
    "alternateName": "und", 
    "name": "Undetermined"
  }, 
  "keywords": [
    "NEANIAS Atmospheric Research Community", 
    "Earth and Planetary Sciences (miscellaneous)", 
    "Geochemistry and Petrology", 
    "Geology", 
    "Geophysics"
  ], 
  "license": "https://creativecommons.org/licenses/by/4.0/", 
  "name": "Conduit formation and crustal microxenolith entrainment in a basaltic fissure eruption: Observations from Thr\u00edhn\u00fakag\u00edgur Volcano, Iceland", 
  "url": "https://www.openaccessrepository.it/record/119967"
}