Mecanismos de emisión, transporte y depósito de las Ignimbritas Roque Nublo (Gran Canaria, Islas Canarias)

• F.J. Pérez Torrado ^[2] ; J. Marti ^[1] ; J. Mangas ^[2]
  1. [1] Instituto de Ciencias de la Tierra Jaume Almera

     Instituto de Ciencias de la Tierra Jaume Almera

     Barcelona, España

     
  2. [2] Departamento de Física-Geología, Facultad de Ciencias del Mar, ULPGC. Campus Universitario de Tafira. Las Palmas de Gran Canaria
• Localización: Geogaceta, ISSN 0213-683X, Nº. 20, 3, 1996, págs. 543-545
• Idioma: español
• Títulos paralelos:
  • Mechanisms of eruption, transport and deposit of the Roque Nublo ignimbrites (Gran Canaria, Canary Islands)
• Enlaces
  • Texto completo (pdf)
• Resumen

  • The Roque Nublo non-welded, lithic rich, ignimbrites are the most characteristic deposits of the second magmatic cycle (P/iocene in age) on Gran Canaria. They originated from vulcanianphreatomagmatic type eruptions wich caused rapid and significant erosion of vents thus incorporating a high proportion of lithic c/asts · into the eruption columns. These rapidly became too dense to be sustained vertical/y and collapsed nearly instantaneously causing the formation of high-density pyroc!astic flows. The pyrocfastic flows were confined to the radial network of pa/eova/leys at the flanks of the Roque Nublo stratovolcano during the main part of their emplacement. In distal areas, e/ose to the coast fine where these paleovalleys opened, most of the pyroclastic flows expanded and formed different sma/1-vo/ume flow units.