Abstract
Abstract. Electrical Resistivity Tomography (ERT) method has been used to study two tectonically active areas of southern Apennine (Caggiano Faults and Ufita Basin). The main aim of this job was to study the structural setting of the investigated areas, i.e. the geometry of the basins at depth, the location of active faults at surface, and their geometrical characterization. The comparison between ERT and trench/drilling data allowed us to evaluate the efficacy of the ERT method in studying active faults and the structural setting of seismogenic areas. In the Timpa del Vento intermontane basin, high resolution ERT across the Caggiano Fault scarps, with different arrays, electrode spacing (from 1 to 10 m) and penetration depth (from about 5 to 40 m) was carried out. The obtained resistivity models allowed us to locate the fault planes along the hillslope and to gather information at depth, as later confirmed by paleoseismological trenches excavated across the fault trace. In the Ufita River Valley a 3560-m-long ERT was carried out across the basin, joining 11 roll-along multi-channel acquisition system with an electrode spacing of 20 m and reaching an investigation depth of about 170 m. The ERT allowed us to reconstruct the geometry and thickness of the Quaternary deposits filling the Ufita Valley. Our reconstruction of the depositional setting is in agreement with an interpretative geological section based on borehole data.
Highlights
Numerous case studies exist aimed at the improving of the knowledge of seismogenic areas by using geophysical exploration
This paper presents the results obtained using the electrical resistivity tomography method (ERT) during the investigation of one strand of the Caggiano Fault (Galli et al, 2006; Timpa del Vento segment), and the deep geological setting of the Ufita River Valley
The ERT method has been applied in two seismogenic areas in order to investigate the deep structural setting of Ufita Valley and one of the strand of the active Caggiano Fault (Galli et al, 2006; Timpa del Vento basin)
Summary
Numerous case studies exist aimed at the improving of the knowledge of seismogenic areas by using geophysical exploration. This paper presents the results obtained using the ERT during the investigation of one strand of the Caggiano Fault (Galli et al, 2006; Timpa del Vento segment), and the deep geological setting of the Ufita River Valley. The ERT investigations were aimed to (1) detecting and pinpointing the fault location, (2) delineating the internal structure of the fault zone (3) estimating the cumulative displacement and (4) imaging the deep geological setting. In both cases a comparison between ERT models and geological evidence from trenching or drilling data was done
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
