Abstract

PEREZ-CORONA, Fred Y. et al. Characterization of structural lineaments and their hydrogeological relevance in the Villa Hidalgo basin (San Luis Potosí, Mexico) by means of potential geophysical methods. Bol. Soc. Geol. Mex [online]. 2017, vol.69, n.3, pp.555-576. ISSN 1405-3322.  https://doi.org/10.18268/bsgm2017v69n3a3.

Based on the integration and processing of potential datasets (Magnetic and Gravity), geophysical-structural lineaments were interpreted to be related to faults that strike northwest and north affecting the Villa Hidalgo basin. The interpretation indicates that NW-SE trend is associated with Laramide Orogeny and post-laramid shear zones. The N-S directions correspond to normal faults linked to extensional stresses that gave rise to zones of weakness serving as conduits for the placement of volcanic rocks, which later collapsed forming grabens such as Corcovada and Peotillos. Piezometric analyzes and geophysical modeling show the existence of several aquifers whose storage and circulation occurs through alluvial material of the Quaternary, faults and fractures in volcanic rocks of the Oligocene and sedimentary rocks of the Cretaceous (Albian-Cenomanian and Maastrichtian-Campanian), presenting a preferred direction of South-North flow.

The northeast portion of the basin is characterized by having the lowest values of topographical elevation, as well as lowest density and magnetization values of the different geological units present in the subsoil, linked to the main discharge zone, where the crossing of the NW-SE and N-S fault systems has caused the connection of the Aquifer system of Villa Hidalgo with the Cerritos aquifer system.

The correlation between the geophysical data, the different fault systems and the geophysical-structural lineaments suggest that the Villa Hidalgo basin is a possible transtensional zone that controls the hydrogeological functioning of the aquifer system.

Keywords : Villa Hidalgo basin; potential methods; Geophysical-structural lineaments; hydrogeological functioning.

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