Peloides de glauconita y apatito en sedimentos carbonatados mesozoicos del sector oriental de la Zona Subbética (provincia de Alicante).

L.M. Nieto ^[1] ; J. Jimenez Millán ^[1] ; J.M. Molina ^[1] ; F. Nieto ^[2]
1. [1] Universidad de Jaén
  
  Universidad de Jaén
  
  Jaén, España
2. [2] Universidad de Granada
  
  Universidad de Granada
  
  Granada, España
Localización: Geogaceta, ISSN 0213-683X, Nº. 20, 7, 1996, págs. 1496-1498
Idioma: español
Títulos paralelos:
- Glauconite and apatite peloids in Mesozoic carbonate sediments from the eastern Subbetic Zone (Alicante province).
Enlaces
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Resumen
- Glauconite and apatite peloids occur in jurassic and cretaceous bioclast-bearing carbonate rocks from the Algayat-Crevillente Unit (Subbetic Zone). The size and the morphology of peloids are controlled by the bioclasts. Internal texture commonly evidence that the glauconite form nuclei surrounded by apatite. K content is elevated in both stratigraphic positions but higher in the cretaceous glauconites than the jurassic glauconites. Textural and chemical evidence indicate a model of glauconitization with two steps: an early dissolution-crystallization process and a further process of K-enrichment. Low K-content in jurassic glauconites can be explained by the calcitic early diagenetic cementation which stops the second step of glauconitization, while the low Fe content of this glauconites could be a later effect due to a deeper burial diagenesis.