Combined Geoelectrical Approach DC and IP Methods in the Identification of the Mineralized Bodies Parallel to the NE-SW Tectonic Line of Kadei River: Case of Quartz or Pegmatite Gold Bearing Veins of Ngoura Subdivision (East Cameroon)

Abstract

A geophysical investigation of subsurface structures using the Syscal Junior 48 resistivity-meter was conducted in Ngoura subdivision (East Cameroon) following a combined geoelectrical direct current (DC) approach involving Resistivity and IP methods. This investigation was allowed to collect data on forty-five ( D. H. Gouet et al. 892continuity is identified by a high concentration of disseminated metalliferous minerals in quartz or pegmatite veins. The mining reconnaissance works in the study area and those of several authors have characterized this anomaly to a lode gold quartz or large pegmatite. The results of this study correlate with geological and tectonic data for the region marked by NE-SW Kadei tectonic line. Therefore, they confirm the reliability of a geoelectrical DC investigation method combining Resistivity and IP to the identification of ore bodies.

Geophysical Prospecting Over a Meta-Ultramafic Sequence with Indicators of Gold Mineralization in Rio Grande do Sul State, Southernmost Brazil

“…The inversion models for chargeability show gradients that represent a possible mineralized structure, with areas of high chargeability disposed by practically all sections, and gradients higher than 10 mV/V, but not necessarily coincident with areas of low resistivity. Meta-ultramafic rocks rarely present primary gold in their original chemical composition; therefore, these chargeability anomalies can be attributed to strong polarization of sulfide and structurally controlled zones and can be interpreted as high concentrations of sulfide minerals, probably associated with quartz veins (Gouet et al 2016).…”

“…The use of automated geoelectrical data acquisition system technology, due to its versatility, has been widely disseminated in environmental, hydrological, geotechnical, and especially mineral research, in which greater detail of the subsoil is sought (Aizebeokhai et al 2011). The low cost, high speed and wide area of data acquisition and good response in complex and heterogeneous geological environments has driven the use of this technique by several authors in the past few decades and has been successful in determining targets (Aizebeokhai et al 2010;Amidu and Olayinka 2006;Dahlin and Loke 1997;Gouet et al 2016;Griffiths and Barker 1993;Loke and Barker 1996;Moreira et al 2016;Olayinka and Yaramanci 1999;Vieira et al 2016).…”

Typology of Sounding Curves and Lithological 1D Models of Mineral Prospecting and Groundwater Survey within Crystalline Basement Rocks in the East of Cameroon (Central Africa) Using Electrical Resistivity Method and Koefoed Computation Method

“…By this VES method (Schlumberger sounding), the variation of the resistivity with depth is measured, depending on the electric properties of the geologic sequences in the subsurface [46]. The electric properties are influenced by the lithology, the water saturation degree of pore spaces, the salinity of the mineralogical fluids involved, and the mineralized bodies along the tectonic lines (fractures and rupture zones) [15,46]. The electric properties of the geologic sequences in the studied subsurface characterize the horizontal and vertical resistivity distributions in the underground and shapes of the vertical electrical sounding curve types.…”

“…(iv) Soils are red ferrallitic or lateritic on the hills and plateaus and the geological cover of the study area can be seen in artisanal mining pits [15].…”

Gold ore identification in Santa Catarina Gabbro using electrical resistivity tomography (ERT) and visualization of mineralization in three dimensions, São Sepé, Rio Grande do Sul, Brazil

“…The use of automated geoelectric data acquisition systems, due to its versatility, has been widely disseminated to solve environmental, hydrological, geotechnical, and especially mineral research, in which a greater detail of the subsoil is sought. The low cost, high speed and wide area of data acquisition and good response in complex and heterogeneous geological environments has driven the use of this technique by several authors in the last decades and has been successful in determining targets (Amidu & Olayinka, 2006;Côrtes et al, 2016;Dahlin & Loke, 1997;Gouet et al, 2016;Griffiths & Barker, 1993).…”