<abstract xmlns="http://www.w3.org/1999/xhtml"><p> Ground magnetic and electrical resistivity survey were undertaken to investigate the occurrence and geometry of iron ore deposit around Tajimi village, Lokoja, North-Central Nigeria. The generated residual map of the ground-magnetic data acquired at 250 stations along 15 traverses revealed numerous prominent anomalies, mostly trending in the N-S direction. The radial power spectrum revealed the depth to magnetic sources between 6 m to 20 m. The interpreted VES data characterized the area into three subsurface layers: top soil, presumably iron ore layer and weathered/fresh basement. The result of vertical electrical sounding curves showed a sudden drop in resistivity (42-241 Ωm) over high magnetic response. The geo-electric section revealed that the study area is generally characterized with thin overburden (0.5-1.7 m) and the thickness of the second layer (presumed to be the iron ore layer) ranged between 6.2-25.1 m. The study concluded that areas of high magnetic intensity showed a sudden drop in resistivity value for the VES points, which give an indication of the presence of an electrically conductive structure presumed to be iron ore deposits.</p></abstract>

Ground magnetic and electrical resistivity survey were undertaken to investigate the occurrence and geometry of iron ore deposit around Tajimi village, Lokoja, North-Central Nigeria. The generated residual map of the ground-magnetic data acquired at 250 stations along 15 traverses revealed numerous prominent anomalies, mostly trending in the N-S direction. The radial power spectrum revealed the depth to magnetic sources between 6 m to 20 m. The interpreted VES data characterized the area into three subsurface layers: top soil, presumably iron ore layer and weathered/fresh basement. The result of vertical electrical sounding curves showed a sudden drop in resistivity (42-241 Ωm) over high magnetic response. The geo-electric section revealed that the study area is generally characterized with thin overburden (0.5-1.7 m) and the thickness of the second layer (presumed to be the iron ore layer) ranged between 6.2-25.1 m. The study concluded that areas of high magnetic intensity showed a sudden drop in resistivity value for the VES points, which give an indication of the presence of an electrically conductive structure presumed to be iron ore deposits.

Geophysical prospecting for iron ore deposit around Tajimi village, Lokoja, North–Central Nigeria

Department of Earth Sciences, Ladoke Akintola University of Technology, P.M.B. 4000, Ogbomoso, Oyo State,

BeeM Geophysics and Borehole Drilling Company, Ibadan,

Materials and Geoenvironment

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Ground magnetic and electrical resistivity survey were undertaken to investigate the occurrence and geometry of iron ore deposit around Tajimi village, Lokoja,...

Geophysical prospecting for iron ore deposit around Tajimi village, Lokoja, North–Central Nigeria

Publié en ligne: 13 déc. 2016

Pages: 151 - 160

Reçu: 03 mars 2016

Accepté: 14 sept. 2016

DOI: https://doi.org/10.1515/rmzmag-2016-0014

Mots clés
Iron ore, Tajimi village, ground magnetic, electrical resistivity, magnetic anomaly

© 2016

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Geophysical prospecting for iron ore deposit around Tajimi village, Lokoja, North–Central Nigeria

Publié en ligne: 13 déc. 2016

Pages: 151 - 160

Reçu: 03 mars 2016

Accepté: 14 sept. 2016

DOI: https://doi.org/10.1515/rmzmag-2016-0014

Mots clésIron ore, Tajimi village, ground magnetic, electrical resistivity, magnetic anomaly

© 2016

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Mots clés
Iron ore, Tajimi village, ground magnetic, electrical resistivity, magnetic anomaly