Abstract

SANCHEZ, Marcos A; SPAGNOTTO, Silvana L  and  MARTINEZ, Myriam P. Rasgos estructurales en la Sierra Pampeana de Velasco y alrededores a partir de los campos gravimétricos y magnetrométricos. Rev. Asoc. Geol. Argent. [online]. 2013, vol.70, n.2, pp.193-201. ISSN 0004-4822.

The region comprising the Sierra de Velasco and Famatina System, in the center-west of the province of La Rioja in Argentina, is a key area for the study of the tectonic amalgamation of land and linked to the Andean uplift. In this paper, we define some features of the crustal structure of this region. To do this, by applying potential methods (gravity and magnetics), properly processed and interpreted through semiautomatic techniques and rib anomalies, it was determined: a) a region that respond to the suture zone between Famatina and Pampia Terrain b) faults related to the uplift of the Sierras de Famatina and Velasco. The above results are represented in a section east - west in a structural model of basement blocks between Famatina and Velasco, up to 12 km deep. It also noted the distribution of faults and dips.

Keywords : Gravity; Magnetism; Werner deconvolution; Analytic signal; Suture.

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