Comprehensive Geophysical Investigation Employing Very Low Frequency and Electrical Resistivity Methods.
Abstract:
Minerals play a crucial role as a valuable economic commodity in fostering the growth and development of nations, states, and communities. This study aimed to identify potential zones for gold mineralization in the Shakwatu area of Niger State, Nigeria, given the evident presence of extensive artisanal mining activities in the region. The investigation utilized the Very Low Frequency Electromagnetic (VLF-EM) and electrical resistivity methods. Six profile lines, each measuring 500 meters in length with 100-meter inter-profile spacing, were established in the study area, employing a sampling rate of 20 meters.
The VLF-EM and geoelectric data were subjected to qualitative interpretation using the Karous Hjelt Fraser Filtering (KHFF) and RES2DINV Software, respectively. The VLF-EM data unveiled several subsurface zones exhibiting high real component current density, indicating the potential presence of subsurface structural features such as fracture and fault zones that may host gold mineralization. These zones were identified as potential or inferred structurally controlled fracture zones with possible gold mineralization, notably visible in profiles 1 to 6 at depths ranging from 20 to 80 meters.
The 2D resistivity imaging results demonstrated elevated resistivity zones with varying shapes, reflecting the heterogeneous nature of mineralization at different depths within the study area. A noteworthy correlation between the two sets of results was observed, with the high resistivity zones possibly indicating the presence of quartz veining structures. These findings contribute valuable insights into the gold mineralization potential of the Shakwatu area and offer essential information for future exploration and development initiatives in the region.
Comprehensive Geophysical Investigation Employing Very Low Frequency and Electrical Resistivity Methods. GET MORE, ACTUARIAL SCIENCE PROJECT TOPICS AND MATERIALS