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oai:docta.ucm.es:20.500.14352/425572024-07-15T17:26:50Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Herrero Fernández, María Josefa author Martín Pérez, Andrea author Gil Peña, Inmaculada author Alonso Zarza, Ana María author Meléndez Hevia, Alfonso author Martín García, Rebeca author 2010 Detailed petrographic observations of Upper Proterozoic –Lower Cambrian deposits of the Castañar de Ibor allows the characterization of the diagenetic history of these rocks. Graywackes, shales and limestones were deposited during the Upper Proterozoic-Lower Cambrian within a siliciclastic-carbonatic marine platform. Dolomite replaced mostly limestones, but also cemented the siliciclastic deposits. Later on magnesium-rich fluids circulating along stylolites, bedding planes and fractures partially replaced the dolostones and some siliciclastic beds. Finally, a new dolomitisation phase produced replacement of the magnesite by dolomite and dolomite cementation. 0213-683X https://hdl.handle.net/20.500.14352/42557 http://www.sociedadgeologica.es/publicaciones_geogaceta.html Caracterización petrológica de los niveles magnesíticos y las dolomías encajantes de Edad Proterozoica Superior- Cámbrico Inferior, Grupo Ibor, Castañar de Ibor, Cáceres