A STRETCHING MODEL TO EXPLAIN THE SALADO BASIN (ARGENTINA)

CAROLINA B. CROVETTO; IVAN NOVARA; ANTONIO INTROCASO

Boletin del Instituto deFisiografia y Geologia

UNR- EDITORA

Lugar: Rosario; Año: 2007 vol. 77 p. 1 - 10

The Salado Basin, placed in Buenos Aires province, Argentina, is one of the most studied sedimentary basins of the area because it curiously presents a significative positive residual Bouguer anomaly. Several models were proposed to explain this gravimetric anomaly in the last 50 years. Recently, some works incorporated geoid undulations, revealing also a positive geoid anomaly over the basin. In this work, we propose a stretching model in perfect Airy isostatic balance to study the Salado Basin. We make a threedimensional study of the basin´s balance from gravity anomalies and geoid undulations, finding a strong overbalance on it Key-words: Salado Basin, Gravity, Geoid undulations, Stretching model.