Thermal history of the Prebetic platformconstraints from apatite fission track data
- L. Barbero
- A.C. López-Garrido
- M. García Hernández
- S. Quesada
ISSN: 1576-5172
Año de publicación: 2002
Título del ejemplar: INTERNATIONAL WORKSHOP ON FISSION TRACK ANALISIS: THEORY AND APPLICATIONS
Número: 4
Páginas: 23-26
Tipo: Artículo
Otras publicaciones en: Geotemas (Madrid)
Resumen
Preliminary apatite fission track data from the Prebetic continental margin show that sediment source for the Aptian-Albian sandstones were likely the Triass ic sandstones and/or the basement rocks o f the Central Iberian zone that by Cretaceous times were already cropping out. Results from modeling show a heating-cooling episode that could be related to the Tethys ocean opening and correspond to a Triassic rifting followed by a Jurassic extensional stage controlled by thermal subsidence. A second cooling-heating episode is recognized by modeling; this could be related to the opening o f the Atlantic ocean during Portlandian-Neocomian times. Final inversion o f the Cretaceous basin is represented by a cooling stage, which began around 20 Ma ago, which is the age o f the extensional collapse o f the internal zones o f the Betic orogen.