2026-07-30T12:11:28Zhttps://docta.ucm.es/rest/oai/request

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

Caracterización petrológica de los niveles magnesíticos y las dolomías encajantes de Edad Proterozoica Superior- Cámbrico Inferior, Grupo Ibor, Castañar de Ibor, Cáceres Herrero Fernández, María Josefa Martín Pérez, Andrea Gil Peña, Inmaculada Alonso Zarza, Ana María Meléndez Hevia, Alfonso Martín García, Rebeca 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. 2023-06-20T00:25:55Z 2023-06-20T00:25:55Z 2010 journal article 0213-683X https://hdl.handle.net/20.500.14352/42557 http://www.sociedadgeologica.es/publicaciones_geogaceta.html spa open access Sociedad Geológica de España