Characterization of Quaternary faults by electric resistivity tomography in the Andean Precordillera of Western Argentina

Deep-seated gravitational slope deformations in the highest parts of the Czech Flysch Carpathians: Evolutionary model based on kinematic analysis, electrical imaging and trenching

“…Resistivity surveys have recently become a helpful method improving landform evolution models in various settings (Lapenna et al, 2003;Maillet et al, 2005;Fazzito et al, 2009;Ribolini et al, 2010). However, the application of ERT to analyse the internal structure of DSGSDs is quite rare (Meric et al, 2005;Pánek et al, 2010).…”

Detection of hidden faults beneath Khlong Marui fault zone using seismic reflection and 2-D electrical imaging

“…Higher resistivity zones are thought to represent unsaturated zones of unconsolidated sediments. As previously mentioned, although rapid changes in resistivity may suggest the presence of fault at the near surface, it is insufficient to make a reasonable judgement because anomalous zones may be caused by factor such as changes in geohydrologic conditions, lithology, or presence of channel cut and fill [37][38][39][40] . For VP1 and VP2 survey lines, resistivity values may be suspected to associate with terrain because low resistivity zones are found on both sides of the hill.…”

Shallow architecture of Fuegian Andes lineaments based on Electrical Resistivity Tomography (ERT). Evidences of transverse extensional faulting in the central Beagle Channel area

“…In resistivity sections, brittle structures such as joints and faults are prone to be displayed as resistivity drops, since these highly fractured zones enhance the weathering and water percolation along them, changing the electrical properties in comparison with the rest of the unaltered rock units (Berge, 2014;Caputo et al, 2003;Fazzito et al, 2009;Stěpančíkova et al, 2011;Tassone et al, 2010). Faults might also be imaged in ERTs either as sharp resistivity contrasts (due to the juxtaposition of materials with distinct electrical responses) or by f lexed patterns in the resistivity fields, produced by the offsets within a unit along the fault plane (Colella et al, 2004;Galli et al, 2013;Suzuki et al, 2000).…”

“…Among the different geophysical methods, the Electrical Resistivity Tomography (hereafter ERT) is a relatively recent near-surface technique that has been developed in parallel with the implementation of multi-electrode arrays and new inversion algorithms. There is a growing body of literature that recognises the wide amount of advantages that this method offers: it is highly sensitive to the electrical properties of materials, it is of relatively fast acquisition, and it has been largely applied to map a variety of geological problems such as tracing fault zones and fracture systems, estimation of the bedrock depth, investigation of sedimentation and infilling processes and analysis of landslides or glacial landforms among others (Caputo et al, 2003;Comas et al, 2004;Fazzito et al, 2009;Maillet et al, 2005;Storz et al, 2000;Tassone et al, 2010). In the southernmost Andes, several examples of this joint use of geophysics along with structural surveys resulted in valuables approaches to improve the knowledge of major morphostructures along the Tierra del Fuego Island ( Fig.…”