Dolomitización y silicificación asociadas a los procesos de sustitución de carbonatos mareales y evaporitas «Sabkha».Tránsito entre las facies Muschelkalk y Keuper de las «Montañas de Prades» (Tarragona).
- Taberner Hernández, Concepción
- Santisteban Bové, Carlos de
ISSN: 0213-683X
Any de publicació: 1991
Número: 10
Pàgines: 35-38
Tipus: Article
Altres publicacions en: Geogaceta
Resum
Carbonate tidal platform and associated evaporite sabl<ha environments are recorded at the MuschelkaIk-Keuper transition in Prades (Coastal Ranges, NE Spain). The original carbonates as well as evaporites (anhydrite) were dolomitized. Anhydrite pseudomorphs have been found preserved in dolomites. Silicification processes are linked to brecciation above erosiona-surfaces in the tidal sequences. Anhydrite relics have been found preserved in quartz. Silicification processes predate the massive substitution of anhydrite by dolomite what suggests two dolomitization phases