Abstract

LINCE KLINGER, Federico et al. Geophysical model with gravimetric and aeromagnetometric data in northeast patagonian massif, Río negro, Argentina. Geoacta [online]. 2014, vol.39, n.1, pp.51-61. ISSN 1852-7744.

To infer crustal distribution for different outcrop lithological units in the northeastern North Patagonian Massif border, Rio Negro province, Argentine, a double inversion model was built using terrestrial gravimetric and aeromagnetometric data. This model, supported by pole reduction and analytic signal maps obtained from aeromagnetic anomaly grids, allows us divide the upper crust in three magnetic domains. The density and magnetic susceptibility lateral variations could be linked to crustal blocks which differ in their genetic origin. These interpretations are in agreement with hypothesis in the North of Patagonia presented by other authors. As a result from the obtained model, we propose a thicker layer related to Yaminué Complex and, probably, its lithological contact with the Nahuel Niyeu formation.

Keywords : Aeromagnetometric; Gravimetric; Model; Crust.

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