Silicificaciones de calizas oolíticas del Dogger en el Subbético Interno oriental: ¿silcretas freáticas?

• M.A. Bustillo ^[2] ; J. Rey ^[1] ; A. Delgado ^[3] ; P.A.Ruiz-Ortiz ^[1]
  1. [1] Universidad de Jaén

     Universidad de Jaén

     Jaén, España

     
  2. [2] Museo Nacional de Ciencias Naturales.CSIC. MADRID
  3. [3] Estación Experimental del Zaidín.CSIC. Granada

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• Localización: Geogaceta, ISSN 0213-683X, Nº. 20, 3, 1996, págs. 639-642
• Idioma: español
• Títulos paralelos:
  • Silicifications of Dogger oolitic limestones in the Eastern Internal Subbetic: ¿freatic silcretes?
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• Resumen

  • Cherts occurring in oolitic limestones of the Dogger in the Internal Subbetic, are studied far the first time. Two genetic hypothesis are considered from the interpretation of the stratigraphic, petrological and geochemical data. The one first considers that the silicification took place in relation with continental groundwater, in the Middle to Late Jurassic transition, forming silcretes. The second one, shows the silicification as generated from marine waters in diagenetic environments at re/atively higher temperatures, during Late }urassic-Early Cretaceous times.