Geology of Sungai Subong, Gua Musang Kelantan and groundwater potential in hardrock by using electrical resistivity imaging method at Kuala Selangor, Selangor.

This study was conducted to access general geology in Sungai Subong, Gua Musang Kelantan and to access the groundwater potential in hard rock at Bestari Jaya, Kuala Selangor, Selangor. The study of groundwater potential is operated by using resistivity survey in selected location. The main objectives of the study were to produce an updated geological map of Sungai Subong in scale of 1:25,000 and to identify the potential groundwater in hard rock at Bestari Jaya, Kuala Selangor, Selangor by based on resistivity value and chargeability value. In study area at Bestari Jaya, Kuala Selangor, Selangor, there are five pole-dipole survey line of resistivity method has been conducted. The data was recorded using ABEM Terrameter SAS 1000. Based on geological mapping and study, there are some aspects such as the geomorphology, lithology, structural geology and historical geology of the study area have been identified. The study area consists of lowland, low hill and hill landform in term of geomorphology. The lithologies found in study area are Permian to Triassic metasediment and sedimentary rock, Tertiary acid intrusive rock and Quaternary to Recent alluvium units. The result showed that the low resistivity region can be found in all of the survey lines. High resistivity values of hard rock such as schist and slate associated with low resistivity value of sandy clay soils.