Structural setting of the Koum sedimentary basin (north Cameroon) derived from EGM2008 gravity field interpretation

Yves SHANDINI; Patrice Arnaud KOUSKE; Severin NGUIYA; Mouzong Pemi MARCELIN

doi:10.2478/congeo-2018-0013

Yves SHANDINI Institute of Fisheries and Aquatic Sciences at Yabassi, The University of Douala, Cameroon
Patrice Arnaud KOUSKE Institute of technology, University of Douala, Cameroon
Severin NGUIYA Faculty of Industrial Engineering, University of Douala, Cameroon
Mouzong Pemi MARCELIN Higher Technical Teacher’s Training College, University of Buea, Cameroon

DOI: https://doi.org/10.2478/congeo-2018-0013

Keywords: Koum sedimentary basin, 3D density model, spectral analysis, horizontal gradient, faults

Abstract

This study is a contribution to the planning of hydrocarbon exploration program of the Koum sedimentary basin in North Cameroon. 3D modeling of WGM2012 gravity data derived from EGM2008 geopotential model in the Koum basin was used together with existing geological and spectral analysis information to give structural picture of the basin. The 3D model of the Koum basin confirms that the basin is developed as a half graben bounded by sub-vertical faults. The thickness of the Cenozoic sediments is about 1.5 km in the eastern part and reaches 4.5 km in the western part of the basin. Gravity lineaments computed by multi-scale analysis revealed structural trends in the E–W, NW–SE, NE–WS and N–S directions. The faults in the sedimentary terrain reach 6 km depth and have a predominant NW–SE trend with E–W trending faults along the contact between the sedimentary section and the basement complex in the northern edge.

Author Biographies

Yves SHANDINI, Institute of Fisheries and Aquatic Sciences at Yabassi, The University of Douala, Cameroon

Department of Oceanology and Limnology

Mouzong Pemi MARCELIN, Higher Technical Teacher’s Training College, University of Buea, Cameroon

Department of Renewable energy