Structural geology analysis using Electrical Resistivity Imaging (ERI) In Felda Chiku 5, Paloh, Gua Musang, Kelantan.
Abstract
The research area was located in the Gua Musang district, and the method employed was Electrical Resistivity Imaging (ERI). Geophysics is the study of physical processes that take place on a variety of scales, from microscopic to planetary and interplanetary. To support the data for interpretations of the underlying structure, geophysical methods were developed. In addition to being very affordable, geophysical technologies may instantly deliver data with excellent precision. Two-dimensional resistivity imaging techniques were employed in this study to look at the geological structures. This approach is reliable for giving precise information on the subsurface, including bedrock depth, overburden material characteristics, and features close to the surface, such as bedding, faults, folds, fractures, and contact zones. Using 2-D resistivity imaging, data is promptly and accurately provided, making it simpler to analyse. Three survey lines were employed to assess the subsurface structural geology of the Felda Chiku 5 area. The first and second survey lines employed a gradient electrode configuration, but the third line used a pole-dipole array with electrode spacing of 5 meters for a 200-meter line spread each. The ABEM Terrameter LS was used to measure resistivity. Following data collection, the activity proceeds to data processing and inversion using the RES2DINV application by projecting resistivity measurements onto a 2D profile and evaluating the resulting data. The pseudosection model displayed variable resistivity values at a depth of inquiry of around 36 meters to 57 meters and a range of 1Ωm to >2500Ωm. According to the model, the research area's structural investigation revealed fault lines in the subsurface region. Subsurface movement was indicated by the fault line. In order to provide the amount of knowledge on underlying geological structures for geoengineering study for site inquiry, this study recommends that additional geophysical investigation (seismic survey) be conducted.