Publications scientifiques
T. Ndougsa-Mbarga
Arsène Meying
Donatus Yufenyiu Layu
Kewal Krishan Sharma
Eliézer Manguelle-Dicoum
An Audio-Magnetotelluric (A.M.T) study is carried out in the Messamena/Abong-Mbang area in Cameroon. It consists of two measurement profiles S-N. The A.M.T data sets are collected using a resistivity meter with frequencies ranging from 4.1 Hz to 2300 Hz. The frequency range used has permitted to reach some important depths because of high resistivity values of the metamorphic rocks. A 1D linearized inversion and 2D modelling of data led to attain a granitic basement at 9 km on one hand, and to put in evidence an important buried fault structure at Abong-Mbang in another hand. From a 2D modelling of pseudo-sections of resistivity and phase, a system of folds has been discovered at Messamena. The tectonic structures put in evidence in the Messamena/Abong-Mbang area are perfectly linked to the collision between the Pan-African Belt and the Congo Craton. The pseudo sections of phase for the two profiles permitted to propose two geological models of rock layers distribution.
