Scientific publications
Marcelin Bikoro-Bi-Alou
Théophile Ndougsa‐Mbarga
A quantitative interpretation of aeromagnetic data is conducted in the Ebolowa-Djoum area. The aim of the study is to estimate magnetic and geometrical parameters of the causative bodies using spectral analysis and 2.5 modeling. In addition an indicative evaluation of the volume of magnetic material is done using geoinformation mapping tool. The techniques are applied to three N-S profiles (P1, P2 and P3) that cross three anomalies at Kamelon (P1), Ngoa (P2) and between Djoum and Olounou (P3). The application of the techniques cited above has given the following results: (1) Magnetic bodies identified have susceptibility with a range that coincides to iron formations such as magnetite and haematite; (2) the depth to the top of the iron formation that produce the observed magnetic anomalies varies from 88 m to 109 m at Kamelon, 32 m to 670 m at Ngoa and 50 m to 580 m along the profile P3; (3) the depth to the foot of that formations is from 614 m to 1240 m at Kamelon, 802 m to 965 m at Ngoa and 250 m to 1340 m along P3; (4) an E-W extent (strike) of iron formations is 12000 m at Kamelon, 1600 m to 12000 m at Ngoa and 12000 m in the P3 profile; (5) a N-S extent (width) of iron formations ranging from 2390 m to 77470m at Kamelon, 3680 m to 9600 m at Ngoa and 1540 m to 13140 m in the P3 profile; (6) indicative volume value of that iron formations varies from 10.1 km 3 to 16.3 km 3 at Kamelon, 0.7 km 3 to 8.7 km 3 at Ngoa and 1.20 to 18.0 km 3 along profile P3.
