Evaluación del estado isostático del valle de La Rioja, La Rioja – Argentina

BUSTOS, GABRIELA; GIMENEZ, MARIO E; MARTINEZ, M PATRICIA; JORDAN, T J

Salvador. Bahia

Congreso; Ninth International Congress of the Brazilian Geophysical Society; 2005

Sociedad Brasilera de Geofísica

prohibited. ___________________________________________________________________ Abstract We carry out a study isostatic 3D in the Valley of the east of La Rioja city in Argentina, considering a system of compensation isostática of the type Airy in stretched crustal. The chart of Bouguer anomalies of gravimetric effects of the sedimentary column and of isostatic corrections, was used to prepare a chart of isostatic anomalies (or of residual isostatic anomaly) including the whole extension of the studied basin. Our results point out that the isostatic anomalies are negative in the domain of the basin, with an evident deficit of antiroot. These values indicate us that in the future; 1) the crust underlying this basin, will ascend to reach the hydrostatic balance or 2) the strong crust could support the sedimentary deposit, without deformation.