Abstract
Gravity data acquired from Earth Gravitational Model (EGM-2008) was analyzed to estimate the sedimentary thickness, extension and shape of the Garoua Basin, North Cameroon. Residual gravity field were obtained by bandpass filtering of Bouguer gravity anomalies using Geosoft Oasis Montaj. Two dimensional (2-D) forward modeling of the gravity data using Grav2dc v2.06, which uses the Talwini’s algorithm was conducted along three profiles oriented NE- SW, NNE-SSW and WNW-ESE to verify the lateral variations of the sediment pile beneath these profiles. Accordingly, the Garoua is made up of alternating succession of horsts and grabens bounded to the north and south by normal faults infilled with sedimentary rocks underlain by a rifted basement. The gravity models suggest an average thickness of sediments of 9km with a graben-shaped and extents over 80km. With this thickness of the sediment pile and considering the average temperature gradient, the subsurface of this basin offers adequate conditions for hydrocarbon generation if source rocks were to be found. The results obtained in this work corroborate those obtained from previous investigations.
Highlights
The Garoua Basin is the continuation of the Yola arm of the northern Benue Trough of Nigeria into the north Cameroon
The Bouguer anomaly map obtained for this study was acquired from the already corrected gravity data of Earth Gravitational Model 2008 (EGM2008)
The relative gravity low anomalies are observed; the anomalies run between Kokoumi and Rey Bouba localities in a NW-SE direction and northeast of Boili locality
Summary
These are, gravity data derived from the Earth Gravitational Model 2008 (EGM2008) These data will be processed and interpreted to determine the lateral extent, sediment pile thickness and the shape of the Garoua Basin. This dataset is a combination of many datasets and has a uniform coverage. Statistical analysis as to compare the gravity data from EGM2008 and land gravity data gives means of −38.25 and −38.21 mGal and a standard deviations of 12.30 and 12.42 respectively (Essi et al, 2017) This statistical analyses indicates the slight diferences that exist between the two sets of data. The spectral analysis technique will be used to qualitatively and quantitatively provide a clear interpretation of the subsurface coniguration of the basin
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
