40Ar/39Ar and U-Pb SHRIMP dating of Aptian tuff cones in the Aisén Basin, Central Patagonian Cordillera

M. Suárez, A. Demant, R. De La Cruz, C. M. Fanning

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

12 Citas (Scopus)

Resumen

Surtseyan tuff cones of the Baño Nuevo Volcanic Complex erupted in shallow marine water during the waning stage of the Aisén Basin, the northern part of the Austral Basin of the Central Patagonian Cordillera. This volcanic complex was emplaced within the Hauterivian to early Aptian Apeleg Formation, the youngest sedimentary unit of this basin, whilst the sediments were still wet. Three new Ar/Ar dates (amphibole) and one U-Pb SHRIMP date (zircon) from this complex yielded concordant early Aptian ages of 122-121. Ma. These data agree with the contact relationships between the Apeleg Formation and the tuff cones. These dates also agree with those of early Aptian ammonites collected from the Apeleg Formation 100. km south of the study area, which represent the youngest fossils identified in this unit. Aptian to Albian subaerial volcanic rocks of the Divisadero Group, paraconformably overlie the Apeleg Formation. The emplacement of the Baño Nuevo Volcanic Complex pre-dates the disappearance of the Aisén Basin.

Idioma originalInglés
Páginas (desde-hasta)731-737
Número de páginas7
PublicaciónJournal of South American Earth Sciences
Volumen29
N.º3
DOI
EstadoPublicada - abr. 2010

Áreas temáticas de ASJC Scopus

  • Geología
  • Procesos de la superficie terrestre

Huella

Profundice en los temas de investigación de '40Ar/39Ar and U-Pb SHRIMP dating of Aptian tuff cones in the Aisén Basin, Central Patagonian Cordillera'. En conjunto forman una huella única.

Citar esto