skip to main content
Idioma:
Primo Search
Clear Search Box
Search in: Busca Geral
Busca Avançada
Busca por Índices

Geomorphological characterization of the 2014–2015 Holuhraun lava flow-field in Iceland

Voigt, Joana R.C. ; Hamilton, Christopher W. ; Scheidt, Stephen P. ; Münzer, Ulrich ; Höskuldsson, Ármann ; Jónsdottir, Ingibjörg ; Thordarson, Thorvaldur

Journal of volcanology and geothermal research, 2021-11, Vol.419, p.107278, Article 107278 [Periódico revisado por pares]

Elsevier B.V

Texto completo disponível

Citações Citado por
  • Título:
    Geomorphological characterization of the 2014–2015 Holuhraun lava flow-field in Iceland
  • Autor: Voigt, Joana R.C. ; Hamilton, Christopher W. ; Scheidt, Stephen P. ; Münzer, Ulrich ; Höskuldsson, Ármann ; Jónsdottir, Ingibjörg ; Thordarson, Thorvaldur
  • É parte de: Journal of volcanology and geothermal research, 2021-11, Vol.419, p.107278, Article 107278
  • Descrição: The 2014–2015 Holuhraun eruption extruded >1 km3 of lava in a barren region of the Icelandic highlands. Due to its large volume and the abundance of data for this eruption, Holuhraun is an ideal site to investigate fissure-fed eruption products for comparison with other large lava flow-fields on Earth and other planetary bodies. To characterize lava morphologies associated with this event, we used 0.01–0.5 m/pixel image data, acquired from aerial surveys and small Unoccupied Aircraft Systems (sUAS) to create a 1:800-scale facies map that was ground-truthed using field observations during the summers of 2015–2019. Each facies region exhibits similar attributes in the remote sensing data, including albedo, surface texture, and geomorphology. However, at our mapping scale of 1:800, the facies typically include mixtures of lava types. Results show that transitional lava types (e.g., rubbly pāhoehoe, slabby pāhoehoe, and spiny pāhoehoe) dominate the 2014–2015 Holuhraun lava flow-field (83.82 km2), rather than the traditional end-members of ʻaʻā and classical pāhoehoe. At 1:800-scale, we distinguish the following eight facies (with the percentage of total flow-field area shown in parentheses): rubbly (57.35%), spiny (25.96%), undifferentiated rubbly–spiny (9.59%), shelly (5.58%), pāhoehoe (1.24%), flat-lying–knobby (0.58%), vent-proximal edifice (0.19%), and channel interior (0.16%). Field observations show that initial coherent pāhoehoe surfaces were episodically disrupted to produce slabby and rubbly textures that resemble ʻaʻā in remote sensing data. Our observations also show that continued solidification of the lava beneath brecciated surfaces can cause the surfaces of disrupted lobes to stabilize, or restabilize and undergo inflation. These factors complicate the use of surface texture as a direct indicator of emplacement style, which can change over the course of an eruption. This complexity has important implications for reconstructing the emplacement history of flow-fields on Earth and other planetary bodies. •Holuhraun flow-field characterization based on facies mapping and field observations.•The flow-field includes eight facies, which are dominated by transitional lava types.•Rubbly, slabby, and spiny pāhoehoe are major products of this fissure-fed eruption.•Disruption events and inflation contributed to overprinting of initial lava texture.
  • Editor: Elsevier B.V
  • Idioma: Inglês
Voltar para lista de resultados

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.