Aportaciones del análisis microestructural a la evolución tectónica del extremo oriental de la Cuenca de Cameros.

• Marqués, L. ^[1] ; Maestro, A. ^[1] ; Gil, A. ^[1] ; Casas, A.M. ^[1]
  1. [1] Universidad de Zaragoza

     Universidad de Zaragoza

     Zaragoza, España

     
• Localización: Geogaceta, ISSN 0213-683X, Nº. 20, 4, 1996 (Ejemplar dedicado a: Comunicaciones presentadas en el IV Congreso Nacional de Geología, Alcalá de Henares, 1996), págs. 767-769
• Idioma: español
• Títulos paralelos:
  • The tectonic evolution of the eastern border of the Cameros Basin: an approach from microstructural analysis
• Enlaces
  • Texto completo (pdf)
• Resumen

  • The analysis of brittle mesostructures in mesozoic rocks of the easternmost part of the Cameros Massif indicates three stages in their tectonic evolution: 1) mesozoic, syn-rift extension, with o-3 varying from N-5 to ENE, determined from orientation of tension gashes and paleostress analysis of striated fault planes, 2) E-W to ESE compression and 3) N-5 to NE-SW compression. The chronology of these two compressions cannot be determined, but relationships between striae on fault planes suggest a possible 2)-3) sequence. The E-W compression could correspond with the mesozoic cleavage-related shortening described by Gil-lmaz and Pocoví-Juan (1994) in neighbour areas. Late N-5 to NE-SW cornpression is consistent with the main shortening stage during the Tertiary in the Cameros Massif and the lberian Chain.