Litificación de carbonatos lacustres Miocenos. Cuenca de Madrid:¿Implicaciones en el estudio de la diagénesis de carbonatos marinos calcíticos?.

1. Sanz Montero, Esther
2. Wright, V. Paul
3. Calvo Sorando, José Pedro
4. Alonso Zarza, Ana María

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lock_openArias Montano externo

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Otras publicaciones en: Geogaceta

Resumen

As a possible model for lacustrine carbonate diagenesls, and as a guide for understanding calcitedominated marine limestones, a range of indurated Miocene limestones from the Madrid Basin were studied. Despite very shallow burial and a calcitic precursor, the micrites and bioclasts underwent two phases of recrystallization. Initially the muds and bioclasts were recrystallized to a microporous uniform luminiscent micrite with complete loss of any primary fabric, possibly in a shallow suboxic phreatic zone. Subsequent exposure and karstificatión (probably in the early Pliocene) resulted in microspar/pseudospar formation causing induration. Low Mg calcite muds appear particularly susceptible to recrystallization

Fuente de los datos: Dialnet