<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Geological mapping and magnetic methods were applied for the exploration of iron ore deposits in the Akunu–Akoko area of Southwestern Nigeria for the purpose of evaluating their geological characteristics and resource potentials. A proton magnetometer measures the vertical, horizontal and total magnetic intensities in gammas. The subsurface geology was interpreted qualitatively and quantitatively. The downward continuations and second vertical derivatives, the small-sized mineralised bodies and shallow features in the study area were mapped. The faults are trending in the following directions: NE–SW, NW–SE, N–S and E–W groups, while the iron ore mineralisation is structurally controlled by two major groups of fault trends, namely, the NE–SW and NW–SE; the N–S and E–W groups are mere occurrences that do not contribute to the structural control of the iron ore mineralisation in Akunu.</p><p>The upward continuation has a linear feature similar to the principal orientation of the regional faults, while Locations 2 and 3 have relatively high magnetic susceptibility zones; suspected to be iron ore deposits. The depths to the magnetic sources ranged from 25 m to about 250 m.</p></abstract>

Geological mapping and magnetic methods were applied for the exploration of iron ore deposits in the Akunu–Akoko area of Southwestern Nigeria for the purpose of evaluating their geological characteristics and resource potentials. A proton magnetometer measures the vertical, horizontal and total magnetic intensities in gammas. The subsurface geology was interpreted qualitatively and quantitatively. The downward continuations and second vertical derivatives, the small-sized mineralised bodies and shallow features in the study area were mapped. The faults are trending in the following directions: NE–SW, NW–SE, N–S and E–W groups, while the iron ore mineralisation is structurally controlled by two major groups of fault trends, namely, the NE–SW and NW–SE; the N–S and E–W groups are mere occurrences that do not contribute to the structural control of the iron ore mineralisation in Akunu.The upward continuation has a linear feature similar to the principal orientation of the regional faults, while Locations 2 and 3 have relatively high magnetic susceptibility zones; suspected to be iron ore deposits. The depths to the magnetic sources ranged from 25 m to about 250 m.

Reconstruction and appraisal of Akunu–Akoko area iron ore deposits using geological and magnetic approaches

Department of Earth Sciences, Adekunle Ajasin University, Akungba–Akoko, Ondo State, Nigeria

Materials and Geoenvironment

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Geological mapping and magnetic methods were applied for the exploration of iron ore deposits in the Akunu–Akoko area of Southwestern Nigeria for the purpose...

Reconstruction and appraisal of Akunu–Akoko area iron ore deposits using geological and magnetic approaches

Publié en ligne: 18 août 2016

Pages: 19 - 38

DOI: https://doi.org/10.1515/rmzmag-2016-0003

Mots clés
magnetic method, geological mapping, quantitative interpretation, Akunu, Nigeria

© 2016 Cyril Okpoli et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Reconstruction and appraisal of Akunu–Akoko area iron ore deposits using geological and magnetic approaches

Publié en ligne: 18 août 2016

Pages: 19 - 38

DOI: https://doi.org/10.1515/rmzmag-2016-0003

Mots clésmagnetic method, geological mapping, quantitative interpretation, Akunu, Nigeria

© 2016 Cyril Okpoli et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
magnetic method, geological mapping, quantitative interpretation, Akunu, Nigeria