Caracterización de posible zona de subsidencia con aplicación de métodos geofísicos en el sector Bolonia, de la cuenca de Loja.

Abstract

Abstract:This present study is based on the application of direct and indirect methods (ETR electrical resistivity tomography) for the analysis and interpretation of the subsidence zone, for which 3 ERT profiles were interpreted, the instruments used is the RES2DINV software for obtaining values of resistivities at each point of measure. The use of the dipole-dipole configuration was decided, this method is used for the analysis of fault planes, landslides and exclusively for the present study of the subsidence planes, it allows to reach an approximate depth of investigation of 70 meters, greater accuracy of the data and without it being necessary to drill the land; From the analysis of the ERT profiles, saturated zones are deduced that cause vertical subsidence whose depth of the subsidence zone varies from 10 to 20 meters in depth. In addition, the data obtained from ERT are correlated with the detailed geological survey obtaining conductive materials associated with saturated clays and surface water levels, as well as the presence of resistive materials related to limestones, chert, siltstones, sandstones, conglomerates.