Geometría y cinemática de la cizalla extensional de Santa Elena-Puente Génave (Zona Centroibérica, Sierra Morena Oriental)

• L.M. Martín Parra ^[1] ; J. Matas ^[1] ; D.J. Martínez Poyatos ^[2] ; F. González Lodeiro ^[2]
  1. [1] Instituto Geológico y Minero de España

     Instituto Geológico y Minero de España

     Madrid, España

     
  2. [2] Universidad de Granada

     Universidad de Granada

     Granada, España

     
• Localización: Geotemas (Madrid), ISSN 1576-5172, Nº. 6, 3, 2004 (Ejemplar dedicado a: IV Congreso Geológico de España (Zaragoza, 12-15 julio, 2004)), págs. 89-91
• Idioma: español
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• Resumen

  • We describe the existence of a late variscan extensional shear zone in the southeastern Central Iberian Zone. The shear zone is E-W oriented, exceeds 100 km along strike, and shows a top-to-thesouth sense o f movement. The location of the shearing is biologically controlled by a narrow band of 50-150 m o f Silurian ampelites in which deformation concentrates. The ampelites and underlying rocks, including a igneous body, show the characteristics of ductile to brittle simple shear deformation. The shear zone creates a maximum cartographic gap that makes superpose Lower Carboniferous rocks directly onto Silurian ampelites, and that ones onto Middle Ordovician rocks. The shear » zone and other structures present in the area (two perpendicular dike networks and late open folds parallel to the shear zone) are interpreted as formed during the same extensional episode.