Significative isostatic uncompensation in the Colorado Basin (Argentine Republic)

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A. Introcaso


Isostatic balance on the deepest zone of the Colorado sedimentary basin was analysed using gravity anomalies. Isostatic anomalies (AI) reach + 90 mGal, pointing out: (1) notable overcompensation today and (2) a tendency of the basin of significantly subsiding in the future to recover masses equilibrium. A value for characterising no isostatic compensation was obtained by an inversion model from Bouguer anomalies (ABc) corrected for sedimentary effects. This model was compared with a perfectly compensated stretching model, that was assumed from deep seismic data (antiroot) and from direct faulting (obtained from seismic lines) on the basement supporting the sedimentary filling.

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Introcaso, A. (2003). Significative isostatic uncompensation in the Colorado Basin (Argentine Republic). Revista De La Asociación Geológica Argentina, 58(3), 474-478. Retrieved from