Caracterización petrológica de los niveles magnesíticos y lasuddolomías encajantes de Edad Proterozoica Superior- CámbricoudInferior, Grupo Ibor, Castañar de Ibor, Cáceres

摘要

Detailed petrographic observations of Upper Proterozoic –Lower Cambrian deposits of the Castañar de Iborudallows the characterization of the diagenetic history of these rocks. Graywackes, shales and limestones wereuddeposited during the Upper Proterozoic-Lower Cambrian within a siliciclastic-carbonatic marine platform.udDolomite replaced mostly limestones, but also cemented the siliciclastic deposits. Later on magnesium-richudfluids circulating along stylolites, bedding planes and fractures partially replaced the dolostones and someudsiliciclastic beds. Finally, a new dolomitisation phase produced replacement of the magnesite by dolomite anduddolomite cementation.