Géodynamique des bauxites sardes, typologie, genèse et contrôle paléotectonique

During the middle Cretaceous the karst bauxites of NW Sardinia are controlled by a favourable climate, an aluminous mother rock (Berriasian marls) and a significant tectonic irritability which allows a morphostructural paleosurface to be constituted on the intracontinental areas, away from the eustatic changes of sea level. In connection with the uplift rate, the aluminous material is distributed into three types of deposit. Their genetic depositional system and main features are incorporated in a geodynamic model applicable to prospecting