Ostreidos de la Unidad de Sopuerta: estudio geoquímico y diagenético

• Autores: Ruth Ibisate Diez-Caballero, José Javier Elorza Zandueta
• Localización: Geogaceta, ISSN 0213-683X, Nº. 47, 2009, págs. 53-56
• Idioma: español
• Enlaces
  • Texto completo
• Resumen

  • The realization of geochemical and diagenetical studies on fossil oyster�s shells from the «Calizas Nodulosas con Ostreidos y Limolitas de Sopuerta unit» has allowed demonstrating the variations in the luminescence of different microstructures, mainly in the Regular Foliated one (RF), as a result of different burial depths. The structural properties of the distinguished microstructures made possible, to a greater or lesser extent, the circulation of diagenetic fluids which provided the shell with diagenetic elements like Fe, Mn or Mg. As a result of this cationic exchange, the shell enriched the fluids with Na or Sr, considered primitive elements in oyster�s shells. The importance of the rocky matrix in the geochemical alterations has been demonstrated, comparing the results of this study with the results obtained by Higuera-Ruiz and Elorza (2006).