skip to main content
Idioma:

Neogene's volcanism in the Cordillera Oriental of the Andes, Colombia

Jaramillo, Jose M ; Rojas Linero, Pilar ; Garver, John I

Earth sciences research journal, 2005-06, Vol.9 (1), p.19-28 [Periódico revisado por pares]

Universidad Nacional de Colombia, Departamento de Geociencias

Texto completo disponível

Citações Citado por
  • Título:
    Neogene's volcanism in the Cordillera Oriental of the Andes, Colombia
  • Autor: Jaramillo, Jose M ; Rojas Linero, Pilar ; Garver, John I
  • Assuntos: Environmental aspects ; Fission track dating ; GEOSCIENCES, MULTIDISCIPLINARY ; Natural history ; Volcanism
  • É parte de: Earth sciences research journal, 2005-06, Vol.9 (1), p.19-28
  • Descrição: Volcanic ashes from local volcanic sources cover most of the Cordillera Oriental of the Colombian Andes. These tephra deposits are generally attributed to volcanoes to the west in the in the Cordillera Central . This study provides evidence that a thicker layer of tephra deposits, 20 to 40 m deep, that are most likely derived from newly recognized local volcanic sources in the Cordillera Oriental . The volcanic ashes that we attribute to the Paipa volcano and possibly others as yet unidentifi ed volcanoes in the Cordillera Oriental have new zircon fi ssion -track ages between 3.6 and 4.7 Ma, with a mean of 4.1 ± 0.5 Ma. We have also recognized younger pyroclastic deposits based on stratigraphic correlation. The high thermal gradient associated to these volcanoes could have had a signifi cant impact in the thermal maturation of the organic matter in Cretaceous and Paleogene sediments affecting the timing of oil generation and migration in the Cordillera and the Eastern Foothills, an area of active oil exploration and production. This discovery of young explosive volcanism highlights a serious potential geological hazard. The tephra deposits cover an extensive area of the " Altiplano Condi- boyacense ", indicating that the volcanoes are highly explosive, and potentially dangerous for about 10 million people that inhabit the " Altiplano ", its animals and crops.
  • Editor: Universidad Nacional de Colombia, Departamento de Geociencias
  • Idioma: Inglês;Português
Voltar para lista de resultados

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

Buscando em bases de dados remotas. Favor aguardar.