CIG   05423
CENTRO DE INVESTIGACIONES GEOLOGICAS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Diagenetic outlines in the Danian transgresion carbonates, North East Patagonia (Rio Negro, Argentina).
Autor/es:
MATHEOS, S.; RAIGEMBORN MARIA SOL; BORYA, AILEN
Lugar:
Alghero (ITALIA)
Reunión:
Congreso; 27th Regional Meeting of the IAS; 2009
Institución organizadora:
International Association of Sedimentologists
Resumen:
The diagenesis of Danian carbonates from the north east Patagonia region (east of Rio Negro Province) was studied formed in cool-water, shelf environments. Dolomitization, dedolomitization and cementation are the most importance processes that included. The thickness of the carbonate sequence (Roca Formation) is about 5 to 9 meters and lies discordantly above the Jurassic vulcanite of Chon Aike Formation and it is covered by Tertiary tuffs deposits or quaternary deposits. The sedimentation is characterized by a relatively well developed shoreface which parts are mainly composed of cross-bedded massive to granular fosiliferous limestones and in less content fine bioclastic sand rich in glauconite. The stratofabric results of tabular type, with wedging beds in the upper part.