Subsurface Tectonic Inferences of the Adamawa Region of Cameroon from EMAG2 Magnetic Data

Njeudjang, Kasi; Yandjimain, Justine; Bouba, Apollinaire; Kanouo, Boris Merlain Djousse; Teikeu, William Assatse; Djongyang, Noël; Ndougsa‐Mbarga, Théophile

doi:10.1155/2022/8451725

Cited by 5 publications

(1 citation statement)

References 38 publications

(42 reference statements)

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“…Njeudjand et al [42] showed that Cameroon has geothermal potential due to the presence of Precambrian basement, Proterozoic, and Archean volcanic series, which are 6 Geofluids the main heat sources of Cameroon. The study estimated the depth of underground structure using EMAG2 magnetic data and advanced processing techniques.…”

Section: Global and Regional Trends In Geothermal Energymentioning

confidence: 99%

Current Status, Future Prospects, and the Need for Geothermal Energy Exploration in Cameroon: Comprehensive Review

Mouzong,

Mfetoum,

Ngoh

et al. 2023

Geofluids

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Cameroon is a country in Central Africa that relies heavily on hydropower, fossil fuels, solar, and biomass for its energy needs. However, the unstable and intermittent nature of these energy sources makes them unreliable, and there is a pressing need for a more secure and sustainable energy supply. Geothermal energy, which is abundant in Cameroon due to its favorable geological characteristics, has not been fully explored as a potential energy source. This study is aimed at providing a comprehensive review of the current status and future prospects of geothermal energy in Cameroon, based on publications related to geothermal energy in Cameroon, geological, and geophysical studies. The objectives of this study are to analyze the existing literature on geothermal energy in Cameroon, to identify the challenges and opportunities associated with geothermal energy development, and to make recommendations for future research and policy decisions. The results indicate that geothermal energy in Cameroon is still in its infancy, with limited research and development in the field. However, the country has geothermal potential, particularly in the Adamawa and Cameroon volcanic line (CVL) areas. The review highlights the challenges and barriers to geothermal energy development in Cameroon, including limited financial resources, technical expertise, and regulatory frameworks. The findings of this study suggest that Cameroon has significant potential for geothermal energy development, and that further exploration and investment in this area could contribute significantly to a more secure and sustainable energy supply in the country.

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Section: Global and Regional Trends In Geothermal Energymentioning

confidence: 99%

Current Status, Future Prospects, and the Need for Geothermal Energy Exploration in Cameroon: Comprehensive Review

Mouzong,

Mfetoum,

Ngoh

et al. 2023

Geofluids

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Epithermal Ag–Au mineralization at Galim-Legalgorou, Cameroon Volcanic Line: insights from alteration mineralogy and mineral chemistry of electrum and sphalerite

Ngang,

Suh,

Wagner

et al. 2024

Int J Earth Sci (Geol Rundsch)

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The Galim-Legalgorou area, located along the north-western branch of the Cameroon Volcanic Line (CVL), is known for artisanal gold mining and primary gold exploration, but the style and origin of the mineralization has not been fully described in the scientific literature. The close spatial association of the mineralization with Tertiary volcanic rocks raises the question of whether or not this is an epithermal system in a region where all previously studied gold occurrences have been classified as orogenic. In this contribution, we use ore mineral and alteration assemblage and mineral microchemistry to constrain the origin and evolution of the mineralization. Gold is alloyed mainly with Ag (max. 53.1 wt%) and show fineness values that vary 379 and 721 with an average of 455. A cumulative percentile plot of Ag concentrations in the cores of all electrum particles, and the observed step-change from Au-rich cores to more Ag-rich mantles in zoned electrum particles, suggest that the mineralization was deposited by two distinct hydrothermal fluid influxes. The observed ore mineral association-electrum, Se/Tl-acanthite, pyrite, Fe-rich sphalerite, ± galena; the measured FeS contents of sphalerite (average 23.1 mol%), and the presence of colloform banded chalcedony and hydrothermal breccia are all consistent with features of low sulfidation epithermal deposits. This study, therefore, demonstrates for the first time, the presence of significant low sulfidation epithermal Ag–Au mineralization on the CVL, an intracontinental rift region only previously known for orogenic gold mineralization. Graphical Abstract

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Application of the pair-input deep learning model for seismicity reassessment in Cameroon

Carvalho,

Mohammadigheymasi,

Crocker

et al. 2024

Acta Geophys.

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Applying advanced signal analysis and feature extraction methods to seismic datasets facilitates the extraction of key information from these valuable resources. In particular, advanced deep learning models can play a crucial role in this extraction process from seismic waveforms. This study aims to analyze the seismicity of the Cameroon area by deeply scanning an archived dataset from a temporary seismic network composed of 32 broadband sensors that operated in Cameroon from March 2005 to February 2007. We thoroughly scan the dataset to detect local earthquakes, calculate an updated crustal velocity model for the region by incorporating the acquired earthquake bulletin, and perform a joint inversion scheme. The DL-based workflow implemented in this study utilizes a pair-input deep learning model for scanning the seismic phases in the dataset, followed by a seismic phase picking process. Applying the Rapid Earthquake Association and Location method allows for the association of detected phases with local seismic events. By combining a set of 17,261 P-picked and 14,239 S-picked phases associated with 473 well-located earthquakes with magnitudes ranging from $$1.3 \le M_L \le 4.6$$ 1.3 ≤ M L ≤ 4.6 , we implement a joint inversion to estimate an updated 1D crustal velocity model and hypocentral parameters. The obtained model reveals layers with thicknesses of 82,034, and 54 km, extending to a depth of 80 km, with P-wave velocities ($$V_{{\text{p}}}$$ V p ) of 6.1, 6.4, 6.6, 7.6, 8.25, and 8.5 km/s, and S-wave velocities ($$V_{{\text{s}}}$$ V s ) of 3.57, 3.74, 3.86, 4.44, 4.82, and 5.0 km/s, respectively. The newly detected seismic events predominantly cluster in the Central Cameroon Shear Zone (CCSZ), the east flank of Mount Cameroon, the region between Mount Cameroon and Bioko Island, and the southern part of Bioko Island. The validity of this approach is further supported by a newly compiled catalog for this period, which is 1.35 times more extensive than the previously reported catalog for this dataset. Finally, the study presents a 3D time-lapse animation illustrating the sequence of detected earthquakes.

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Subsurface Tectonic Inferences of the Adamawa Region of Cameroon from EMAG2 Magnetic Data

Cited by 5 publications

References 38 publications

Current Status, Future Prospects, and the Need for Geothermal Energy Exploration in Cameroon: Comprehensive Review

Current Status, Future Prospects, and the Need for Geothermal Energy Exploration in Cameroon: Comprehensive Review

Epithermal Ag–Au mineralization at Galim-Legalgorou, Cameroon Volcanic Line: insights from alteration mineralogy and mineral chemistry of electrum and sphalerite

Application of the pair-input deep learning model for seismicity reassessment in Cameroon

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