Version 1
: Received: 21 February 2024 / Approved: 21 February 2024 / Online: 22 February 2024 (12:39:46 CET)
How to cite:
Lionel, M.Y.; Alessandra, R.; Joseph Quentin Yene, Y.A.; Thomas, L.; Désiré, N.; Mohamed Moustapha, N.N. Water-Bearing Complexes and Fault Breccia Aquifers of the Sanaga Valley Fault System: New Insight from Outcrops, Wells, and Geophysics Data. Preprints2024, 2024021246. https://doi.org/10.20944/preprints202402.1246.v1
Lionel, M.Y.; Alessandra, R.; Joseph Quentin Yene, Y.A.; Thomas, L.; Désiré, N.; Mohamed Moustapha, N.N. Water-Bearing Complexes and Fault Breccia Aquifers of the Sanaga Valley Fault System: New Insight from Outcrops, Wells, and Geophysics Data. Preprints 2024, 2024021246. https://doi.org/10.20944/preprints202402.1246.v1
Lionel, M.Y.; Alessandra, R.; Joseph Quentin Yene, Y.A.; Thomas, L.; Désiré, N.; Mohamed Moustapha, N.N. Water-Bearing Complexes and Fault Breccia Aquifers of the Sanaga Valley Fault System: New Insight from Outcrops, Wells, and Geophysics Data. Preprints2024, 2024021246. https://doi.org/10.20944/preprints202402.1246.v1
APA Style
Lionel, M.Y., Alessandra, R., Joseph Quentin Yene, Y.A., Thomas, L., Désiré, N., & Mohamed Moustapha, N.N. (2024). Water-Bearing Complexes and Fault Breccia Aquifers of the Sanaga Valley Fault System: New Insight from Outcrops, Wells, and Geophysics Data. Preprints. https://doi.org/10.20944/preprints202402.1246.v1
Chicago/Turabian Style
Lionel, M.Y., NDJIGUI Désiré and NDAM NJIKAM Mohamed Moustapha. 2024 "Water-Bearing Complexes and Fault Breccia Aquifers of the Sanaga Valley Fault System: New Insight from Outcrops, Wells, and Geophysics Data" Preprints. https://doi.org/10.20944/preprints202402.1246.v1
Abstract
The Sanaga River Valley is a deep-seated structure of about 220 km in width, bounded on its northern and southern sides by 025-0550 fault zones. Its internal structure has been very little described before this study. It is characterized by the presence of surface features where a thick stratum of shale and argillaceous sandstones have been documented. The use of electrical resistivity tomography for near-surface imaging and hydrogeological prospecting within shale succession is widespread. However, several methods of spatial modeling of resistivity contours are generally proposed for the interpretation of inverse resistivity model sections. To determine the most appropriate method for interpreting resistivity tomographies in the context of subsoil marked by significant heterogeneity, logarithmic contour intervals, and linear contour interval processing were implemented on data collected over five areas. The data consists of outcrops data, cuttings samples from groundwater boreholes, and resistivity sections ranging in length from 240 to 1000 m. Well-control of the inverse resistivity model sections derived from both processes shows that the linear contour intervals modeling gives a more realistic picture of the reservoir size of the wa-ter-bearing sand in both shale and argillaceous sandstone succession. The sedimentary architecture over Sanaga fault breccia is marked by vertical intrusion anomalies up to 80 m high. The shape of these anomalies, as well as the very low resistivity values that characterize them, suggests that they could be related to mud intrusion.
Environmental and Earth Sciences, Geophysics and Geology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
