Integrated Interpretation of FALCON Airborne Gravity Gradiometer, Magnetic and Seismic data acquired over the Chirete Block, Argentina

Abstract

Integrated interpretation of high resolution FALCON airborne gravity gradient and magnetic data with 2D seismic data from the Chirete Block, onshore northern Argentina, provided enhanced understanding of the tectonic framework, basement configuration, and sedimentary structures. Basement related faults/lineament maps were generated using several enhancements of gravity gradient and magnetic data. These were combined with magnetic depth estimates, seismic and gravity to create an integrated 3D basement model. Seismic depth sections, velocities, and well logs from nearby discoveries, were used as constraints for 2.5D and 3D gravity and magnetic modeling. This enabled key sedimentary features to be identified and mapped both along and between existing seismic lines. Several igneous provinces were identified, and are probably related to the rift and post-rift periods. A strong correlation exists between faults derived independently from seismic reflection data and enhanced Airborne Gravity Gradiometer data. A number of structural features were identified with the mapped faulting, which may provide new targets for further interpretation or drilling