Aplicación geofísica de la tomografía de resistividad eléctrica al estudio de la falla Chinguilanchi en el borde oriental de la cuenca de Loja

Abstract

Abstract: This study applies direct and indirect methods to interpret the continuity of a geological fault located in the Chinguilanchi sector, as determined in previous studies (Salinas, 2025). Through the application of two north-south oriented electrical resistivity profiles, conductive and resistive layers were identified. The lateral continuity of these layers was determined using the Dipole-Dipole configuration. Resistivity values were correlated with the subsurface lithological layers, defined as conglomerates, sandstones, calcareous shales, and clayey shales belonging to the San Cayetano Formation. The changes in the lateral continuity of the resistive layers define areas susceptible to displacement that were affected by the presence of the fault. This determined that the fault has a northeast-southwest orientation in the area, which morphologically produces changes in the continuity of the relief in the zone and in the folded structures of the eastern margin of the Loja Basin.