Resumo

KOSTADINOFF, J; BJERG, E; RANIOLO, A  e  SANTIAGO, E. Earth gravity and magnetic field anomalies in the Sierra of Socoscora, San Luis province. Rev. Asoc. Geol. Argent. [online]. 2003, vol.58, n.4, pp.505-510. ISSN 0004-4822.

The Sierra de Socoscora is a north - south trending mountain range, located nortwest of the Sierra Grande of San Luis. The basament is constituted by high grade metamorphic rocks with few associated metabasites. Earth gravity and magnetic field measurements are indicative of the presence of bigger volumes of mafic rocks below the surface, which carry anomalous concentrations of ferromagnetic and/or paramagnetic minerals (magnetite and/or sulfides). An excess of mass below this Sierra is shown by Bouguer gravimetric anomalies with magnitudes similar to those measured in the Sierra Grande de San Luis. Positive magnetic anomalies are indicative of the presence of mafic rocks with anomalous concentrations of magnetic minerals.

Palavras-chave : Geophysics; Gravity; Magnetism; Anomalies; Structures; Sierra de Socoscora.

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