Glauconite and Phosphate Peloids in Mesozoic Carbonate Sediments (Eastern Subbetic Zone, Betic Cordilleras, SE Spain)

• DOI: 10.1180/claymin.1998.033.4.03
• Publication Date: 2006-11-20T08:29:06Z
• Authors: J. Jimenez-Millan
• Keywords: Glauconite

Glauconite and Ca phosphate peloids occur in Jurassic Cretaceous bioclastic carbonate rocks from pelagic swell sequences of the Algayat-Crevillente Unit (Subbetic Zone). The size morphology are controlled by bioclasts. glauconite both stratigraphic positions is K rich (>0.69 atoms p.f.u.) shows well-defined 10 Aa lattice fringes. Poorly crystalline areas with a composition Fe-smectite found within peloids, indicating nature glauconitic precursor. This precursor would be formed shielded microenvironments bioclast later transformed to equilibration sea water that culminated crystallization phosphatic phase. greater presence smectite lower contents (0.69-0.81) these glauconites, compared glauconites (0.81-0.89) can explained calcitic early diagenetic cementation which stopped process glauconitization.