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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)

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International Journal of Geosciences 2016年第7期7卷 891-903页

作者： Daniel Hervé Gouet Stéphane Patrick Assembe Arsène Meying Marcelin Bikoro Bialou Josué Kalaza Haskandi Théophile Ndougsa-Mbarga Department of Petroleum and Gas Explorations Institute of Mines and Petroleum Industries University of Maroua Maroua Cameroun Department of Physics Faculty of Science University of Bamenda Bambili Cameroon Department of Applied Geophysics Geology and Mining Exploitation College University of Ngaoundéré Ngaoundéré Cameroon Department of Earth Sciences Faculty of Science University of Maroua Maroua Cameroun Department of Earth Sciences Faculty of Science University of Ngaoundere Ngaoundere Cameroon Department of Physics Advanced Teacher’s Training College University of Yaounde I Yaounde Cameroon

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 (45) profiling lines at three acquisition levels (AB = 100 m, MN = 10 m;AB = 200 m, MN = 20 m and AB = 500 m, MN = 50 m) and two electric panels L1 and L4, using the Schlumberger array. Processing, modeling and interpretation of data collected using the Winsev, Res2Dinv and Surfer software helped in highlighting a conductive and strongly mineralized discontinuity in granite formations, which lined up with the ne-sw Kadei tectonic line. It extends beyond 100 m depth over an average width of 600 m. The mineralization associated with this discontinuity 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.

关键词： Geoelectrical Investigation Direct Current IP Method Resistivity ne-sw tectonic line Mineralized Body Conductive Area

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