Procesos de dolomitizacíón acaecidos en las sedimentitas carbonáticas del Ordovícico Inferior de la Precordillera, San Juan, República Argentina

Abstract

Dolomitization processes are recognized in the Lower Ordovician San Juan Formation, Central Argentine Precordillera. The sedimentary sequence is composed by limestones with different textures, predominantly wackestone and biodastic packstone in massive and well laminated deposits, with typical tabular stratofabric. The main early diagenetic features are represented by incomplete fibrous calcite cement and eogenetic dolomite. Late calcite cement, polimodal dolomite and stylolites are the main burial diagenetic products. The late stages of diagenesis are signed by a third type of dolomite