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Geoacta

versión On-line ISSN 1852-7744

Resumen

CROCE, Flavia A et al. Estimación de profundidades del Complejo Plutónico Navarrete mediante procesamiento gravimétrico. Geoacta [online]. 2009, vol.34, n.1, pp. 1-8. ISSN 1852-7744.

A gravimetric study is presented in the northeast region of the Somuncurá massif, with the objective of analyzing the geometry and maximum depths of the Navarrete Plutonic Complex, located in the upper crust. A Bouguer anomaly map was filtered in order to separating these anomalies in regional anomaly (which should contain the effects of deep crustal features) and residual anomaly (which should contain the effects of local and near surface masses). The process used was the upward continuation method of the potential field. As a result, the west Navarrete granite formation shows a positive value of +5 mGal for gravity anomalies. On the contrary, the east Navarrete granite formation presents negative values between -5 and -10 mGal. A two dimensional power spectrum was applied to the Bouguer residual anomaly to estimate the igneous bodies' maximum depths, with 8 km depth for east Navarrete granite and 6.5 km for west Navarrete granite.

Palabras llave : Gravimetry; Somuncurá; Granites; Structures; Depths.

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