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Advancements in mapping landslide susceptibility in Bafoussam and its surroundings area using multi-criteria decision analysis, statistical methods, and machine learning models J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-03-22 Willy Stephane Segue, Isaac Konfor Njilah, Donald Hermann Fossi, Daouda Nsangou
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The 2015 earthquake swarm in the Fentale volcanic complex (FVC): A geohazard risk for Ethiopia's commercial route to the Djibouti port. J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-03-18 Atalay Ayele, Richard Luckett, Brian Baptie, Kathy Whaler
We investigate rare seismicity in the neighborhood of the Fentale volcano, main Ethiopian rift that occurred in spring 2015 using data recorded by the Ethiopian Seismic Station Network. Over 1350 earthquakes are located and a seismic swarm is observed to the northeast of Fentale volcano, with the largest earthquake having a magnitude of 4.3 ML. Several VT (volcano-tectonic) and LP (long-period) events
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Radiological hazards assessment of building materials used in Swakopmund, Namibia J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-03-18 Tobias Endjambi, Benjamin Mapani, Rosemary Shikangalah, Kamunda Caspah, Munyaradzi Zivuku
A Canberra coaxial High Purity Germanium (HPGe) gamma-ray spectrometry detector was used to measure activity concentrations of radionuclides in commonly used building materials in Swakopmund, Namibia. The activity concentrations in, Bq.kg, for Ra, Th and K in all sample groups of building materials (cement, sand, cement bricks and roof tiles) were found to be in the range of 18.002–499.266, 14.069–132
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Preliminary assessment of the Cambro-Ordovician reservoir potential from the Shushan basin, north Western Desert, Egypt J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-03-16 Sherif Farouk, Souvik Sen, Saada Ahmed Saada, Ahmad Dousky, Mariam Mohammed Reda, Khaled El-Kahtany, Mohammad Abdelfattah Sarhan
This study presents the first-ever preliminary assessment of the potential reservoir intervals from the Cambro-Ordovician Shifah Formation of the Shushan Basin, Western Desert. Seismic data, thin sections, XRD, XRF, and wireline logs were integrated to characterize the potential intervals. The study area is characterized by E-W and ENE-WSW trending steeply dipping normal faults creating a series of
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Frequency-based electric fingerprint and thermal properties of the NWA 869 chondrite J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-03-16 Bassem S. Nabawy
The NWA 869 chondrite is among many common stony regolith breccia meteorites that have been collected from northwest Africa (NWA). It is composed of Fe sulphide and Fe-Ni metallic phase inclusions embedded in a silicate stony matrix (primarily pyroxene). Although the physical properties of meteorites are the implementation of their mineral and chemical compositions, their electric and dielectric properties
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Integrating 3D subsurface imaging, seismic attributes, and wireline logging analyses: Implications for a high resolution detection of deep-rooted gas escape features, eastern offshore Nile Delta, Egypt J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-03-13 Amir Ismail, Ahmed A. Radwan, Mahmoud Leila, Emad A. Eysa
The eastern part of the offshore Nile Delta is one of Egypt's most productive gas provinces. This study utilizes well logs dataset and 2D seismic from Port Fouad marine (PFM) Field to investigate reservoir lithofacies, rock-types as well as the associated gas chimneys, pockmarks, bright anomalies of escaping fluids in the seafloor, and high-faulted zones caused by the chimney's developments. First
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Sequence stratigraphy of the paleozoic successions in Ghadames Basin, southern Tunisia: Insights from integrated interpretation of well logs and seismic data. J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-03-12 Amira Zrelli, Adnen Amiri, Kawthar Sebei, Oussama Abidi, Nesserine Barhoumi, Samir Kharbachi, Mohamed Hedi Inoubli
The Ghadames Basin is considered as huge intracratonic structure, which preserved over 4000 m of Paleozoic sedimentary succession deposited over the Precambrian Basement. The present work consists of an integrated interpretation of the Paleozoic interval in the Ghadames basin of southern Tunisia using well logs and calibrated seismic data. Thus, the adopted sequence stratigraphic approach allowed the
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Corrigendum to “The ocean-continent transition in the western central Red Sea” [J. Afr. Earth Sci. 208 (2023) 105093] J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-03-12 N.C. Mitchell, J. Preine, O.I. Okwokwo, A.Y. Izzeldin, N. Augustin, I.C.F. Stewart
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Machine learning models for gully erosion susceptibility assessment in the Tensift catchment, Haouz Plain, Morocco for sustainable development J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-03-11 Youssef Bammou, Brahim Benzougagh, Ouallali Abdessalam, Igmoullan Brahim, Shuraik Kader, Velibor Spalevic, Paul Sestras, Sezai Ercişli
Gully erosion is a widespread environmental danger, threatening global socio-economic stability and sustainable development. This study comprehensively applied seven machine learning (ML) models including SVM, KNN, RF, XGBoost, ANN, DT, and LR, and evaluated gully erosion susceptibility in the Tensift catchment and predict it within the Haouz plain, Morocco. To ensure the reliability of the findings
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Trends in temperatures in Sub-Saharan Africa. Evidence of global warming J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-03-09 Samuel Chibuzor Umeh, Luis A. Gil-Alana
Climate change has become a serious environmental matter of global concern. This paper attempts to verify if there is climatic change in Sub-Saharan Africa with the help of monthly station data from January 1901 to December 2020 on the mean temperatures of 48 countries of Sub-Saharan Africa. To do this, we employ fractional integration to account for the data's probable long memory feature. However
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A review of the geological characteristics and resource potential analysis of potash deposits in Africa J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-03-09 Hongwei Sun, Junping Ren, Jie Wang, Xingyuan Wu, Wenlong Tang
Globally, potash resources are distributed unevenly, with most of its reserves and output are mainly concentrated in a few countries and companies. Finding new supply sites for potash resources is an important task for geologists due to scarcity of potash resources in the world. Africa, rich in potash reserves, predominantly harbours them in countries such as Congo (Brazzaville), Ethiopia, Eritrea
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Evaluation of tectonic activity using morphometric indices: Study of the case of Taïliloute ridge (middle-Atlas region, Morocco) J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-03-08 Driss Sadkaoui, Benzougagh Brahim, Shuraik Kader, Kamal Agharroud, Abdel-Ilah Mihraje, Khadija Aluni, Habiba Aassoumi, Slimane Sassioui, Velibor Spalevic, Paul Sestras
In the Middle Atlas region, the Tizi N'Teghtène Fault System is a network of faults inherited from the Hercynian orogeny, which operated as normal faults during the Jurassic and reverse faults since the Miocene. The issue at hand is whether this fault system continues to be active today. To address this concern, focus has been placed on a central portion of the Tizi N'Teghtene Fault System, specifically
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Late Ediacaran post–collisional granite in Babouri–Figuil (Northwest Cameroon): Implication for crustal–mantle contributions in an extensional setting J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-03-07 Basua Afanga Archelaus Emmanuel, Changqian Ma, Kanouo Sylvestre Nguo, Lian-Xun Wang, David R. Lentz, Soumyajit Mukherjee, Bovari Yomeun Syprien, Yu-Xiang Zhu, Nformidah Ndah Siggy Signe
The Babouri–Figuil Magmatic Complex (BFMC, adjacent to the central-south Chad domain) is located on the southern flank of the Saharan Metacraton. It is amongst the least geologically studied regions in Cameroon; only a few key research papers on geochronology and isotopes have been completed. The emplacement of granitic bodies is poorly constrained between the early and late–Neoproterozoic with inherited
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The origin of high salinity and hydrogeochemical characteristics of groundwater in semi-arid area of the Linta Basin, Southwestern Madagascar J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-03-06 Onja Eric Mario Rafenoarisoa, Ondra Sracek, Jean-Jacques Rahobisoa, Bohuslava Čejková, Ivana Jačková, Serge Brouyère
The Linta Basin, located in the Southwestern Madagascar, is a semi-arid area where groundwater in fractured media bedrock aquifer constitutes the main source of water supply. In the last two decades, highly mineralized groundwater was identified in this area; however, the origin of the salinity was not clear. The purpose of the study was to clarify the origin of salinity and to identify hotspots with
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The legacy of African kimberlite and diamond research and exploration for the earth sciences J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-03-06 Andy Moore, Herwart (Herb) Helmstaedt, Marion Bamford
Kimberlite is a rare and volumetrically insignificant magmatic rock, which nevertheless has an outsized economic importance as the world's principal source for natural diamonds. Discovered in 1870, in South Africa, it was named after Kimberley, the town that grew around the first mines developed in the pipe-shaped bodies of the newly discovered, ultramafic diamond source rock. Apart from their economic
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Crustal evolution of the northern Nyika Subdomain of the Palaeoproterozoic Ubendian belt in Malawi J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-03-04 Benjamin Le Bayon, Alexis Plunder, Robert J. Thomas, Thomas Fullgraf, Nicolas Charles, Victor Nyalugwe, Steven D. Boger, Philippe Lach, Dirk Frei, Yann Lahaye
The Ubendian belt extends from eastern Congo through SW Tanzania and NW Zambia across northern Malawi and into Mozambique. It results from the Palaeoproterozoic accretion of a number of crustal blocks followed by the collision of the Tanzanian and Congo cratons. The Ubendian belt has been classically divided into eight “terranes”, (termed “subdomains” in this work), based on rock assemblage, magmatic
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Integrated multi-proxy source-to-sink analysis of Late Barremian (Lower Cretaceous) clastic systems in the Essaouira-Agadir Basin J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-03-04 Emmanuel Roquette, James Lovell-Kennedy, Leonardo Muniz Pichel, Stefan Schröder, Rémi Charton, Ian Millar, Camille Frau, Jonathan Redfern
This study investigates the provenance of the continental and marine Late Barremian clastics of the Bouzergoun Formation, exposed in the Essaouira-Agadir Basin (EAB). Thin section petrography, Scanning Electron Micrography, heavy minerals analysis, and detrital zircon dating were conducted and integrated with a large dataset of published Low-Temperature Thermochronology (LTT) studies to reconstruct
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Geochemical and mineralogical characterizations of Silurian “Hot” shales: Implications for shale gas/oil reservoir potential in Jeffara basin-southeastern Tunisia, North Africa J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-02-27 Imen Arfaoui, Omar Hamdi, Frédéric Boulvain
The Silurian organic-rich hot shale deposits represent the origin of 80–90% Paleozoic sourced hydrocarbons on the entire Saharan Platform. As such, it is an area of significant interest for exploring its potential as an unconventional reservoir and gaining new insights into its properties. In this study, the geochemical and mineralogical analysis of eighty-two borehole samples from three studied wells
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Aouelloul impact crater, Mauritania: New structural, lithological, and petrographic data J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-02-20 E. Ould Mohamed Navee, H. Chennaoui Aoudjehane, D. Baratoux, L. Ferrière, M.S. Ould Sabar, H. Si Mhamdi
The Aouelloul circular structure (Mauritania), 0.4 km in diameter, is a simple impact crater, which formed approximately 3 Myr ago. The Aouelloul crater was confirmed to be an impact crater based on the presence of an extraterrestrial component in glass fragments found around the crater, but so far, no evidence of shock metamorphism in minerals, such as shocked quartz grains, is reported. The crater
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Blue lace agate and chalcedony pseudomorphs from Ysterputs in southern Namibia J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-02-19 Megan Welman-Purchase, Joanna Wicht, Duncan Miller, Frederick Roelofse
The Blue Lace Agate mine exploited a hydrothermal vein deposit at Ysterputs in southern Namibia until 2017. The deposit occupies a shear zone and associated fractures in a Jurassic dolerite sill that intruded a Permian marine deposit. Much of the chalcedony constituting the agate is the length-slow variety ‘quartzine’, indicating deposition in a saline environment, presumably derived from the marine
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Enhancing hydrological analysis by incorporating environmental and artificial tracers of an altered vadose zone: A systematic review J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-02-16 Yazeed van Wyk, Matthys Alois Dippenaar, Eunice Ubomba-Jaswa
This review investigates the integration of environmental and artificial tracers for evaluating water flow within modified vadose zone environments and assesses how heterogeneous structures and preferential flow influence transport mechanisms, residence times, and flow pathways. Utilising both single and multiple tracers the precision of flux estimations between the vadose zone and water table can
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Predictive insights for copper recovery: A synergistic approach integrating variability data and machine learning in the geometallurgical study of the Tizert deposit, Morocco J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-02-15 Kaoutar Dachri, Mohamed Bouabidi, Khalid Naji, Kalthoum Nouar, Intissar Benzakour, Abdellah Oummouch, Mohamed Hibti, Khalid El Amari
This work involved the application of machine learning (ML) to predict copper recovery through variability data in the context of the geometallurgical study of the Tizert deposit in Morocco. For this purpose, geological and metallurgical variability investigations were conducted on drilling samples from Tizert ore, leading to the consolidation of a robust database for ML algorithms. The dataset comprised
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Gold-bearing quartz veins and associated rocks in the Wawa area, western Nigeria: Insights to their nature from field investigation, petrographic study, and geochemical analysis J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-02-15 S.A. Alimi, E.J.M. Carranza
This study focused on the Wawa area, a southern extension of the Zuru Schist Belt (ZSB) in Northwestern Nigeria. The ZSB is one of western Nigeria's broadest and least studied schist belts. Information about its full extent, petrological, and geochemical characteristics still needs to be improved. Preliminary field investigations have shown that the Wawa study area possibly hosts orogenic gold deposits
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Groundwater quality constrains and new opportunities for water supply from hard rock aquifers in a fast-expanding city of Sub-Saharan Africa, Yaoundé-Cameroon J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-02-15 Enoh Jeanot Fongoh, Helene Celle, Bertil Nlend, Frederic Huneau, Suzanne Ngo Boum-Nkot, Gloria Eneke Takem, Wilson Yetoh Fantong, Akoanung Ayaba Abendong, Marie Joseph Ntamak-Nida
Expanding cities and their water utilities face a significant challenge ensuring safe and sufficient water supply within a context of great uncertainty. Population growth, urbanisation and economic fluctuation coupled with climate variability further exacerbate these problems in Sub-Saharan Africa (SSA).The study focusing in Yaoundé-Cameroon, Central Africa demonstrates quality constrains and new opportunities
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Subduction-related mafic-silicic magmatism in the Nubian Shield: Tectono-magmatic implications of ensialic island arc association at Central Eastern Desert, Egypt. J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-02-14 Abdelhady Radwan, Mohammed H Younis, Mohamed A. Hassan, Hassan Abbas
For the Wadi El Mayet, the metagabbro-granodiorite-tonalite intrusive complex (MIC) occupies the eastern sector of famous wadi Mubarak–Dabr complex which considered as the largest intrusion in the Egyptian Eastern Desert. The basement associations in the area include volcano-sedimentary rocks, metavolcanics, and ultramafics. The whole successions were intruded by MIC, and granites. The (MIC) comprises
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Architecture of Oxfordian coral buildups along the Atlantic margin of Morocco J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-02-14 Aude Duval-Arnould, Luc Bulot, Rémi Charton, Sreepat Jain, Moussa Masrour, Luis Pomar, Jonathan Redfern, Mike Simmons, Stefan Schröder
Oxfordian (Upper Jurassic) coral buildups developed widely in Tethys and Atlantic realms, during a time when paleoclimate potentially swung between greenhouse climate and cold snaps. Buildups were constructed by platy and branching corals, sponges and microbialites. Although their initiation is commonly linked to the Upper Jurassic global transgression, a number of global and local factors may have
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2D parallel simulation of seismic wave propagation in poroelastic media to monitor a CO2 geological sequestration process J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-02-10 Emmanuel Anthony, Nimisha Vedanti
Geological sequestration of carbon dioxide involves storing beneath geological formations to reduce atmospheric emissions. Typically, is pressurized into a liquid state and injected into porous rock formations. Monitoring this process relies on seismic data. For the effective monitoring of seismic wave propagation in extensive formations, a highly efficient and robust algorithm is essential. We developed
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Tetrapod tracks from the Middle/Late Triassic of the Ourika and Yagour basins (Morocco): new ichnotaxonomical data based on the Biron collection J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-02-10 Jean-David Moreau, Naima Benaouiss, Abdelilah Tourani, Nour-Eddine Jalil, Sylvie Bourquin
Palaeontological prospecting organized in the Ourika and Yagour basins (Marrakech High Atlas, Morocco) in the 1980's, have yielded abundant and exquisitely preserved tetrapod tracks, some of them preserving thinly detailed skin traces (Collection Biron, Cadi Ayyad University, Marrakech, Morocco). Based on this material, diverse morphologies of tracks were described and six new ichnotaxa were erected
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Multi-decadal evolution of the Moroccan Atlantic shoreline: A case study from the Essaouira coastal sector J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-02-08 Saadia Lharti, Germán Flor, Sahar El kasmi, Germán Flor-Blanco, M'hamed El Janati, Marco Marcelli, Daniele Piazzolla, Sergio Scanu, Giancarlo Della Ventura, Boubker Boukili, Nacir El Moutaoukkil
The degradation of coastlines is a result of global warming, which is closely accompanied by rising sea and ocean levels, as well as anthropogenic activities. The systematic fixation of mobile dunes has proven to be a positive environmental practice thus far. To accurately assess and predict future trends, it is essential to analyse the position of the coastline and understand its dynamics over time
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Parent material, weathering and heavy metal contamination in the surface soils from basin infill sediments in Elazığ Industrial Area, Eastern Turkey J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-02-05 Dicle Bal Akkoca, Ismail Yıldırım, Ali Ismail Al-Juboury
In this study, geochemical properties were investigated to constrain the provenance, weathering conditions and to evaluate distribution and potential sources of heavy metals in the surface soils from basin infill sediments in Elazığ Industrial Area, Eastern Turkey. Soil samples contain clay minerals (smectite, chlorite and illite), feldspar, quartz, calcite and dolomite. Geochemical patterns of major
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Palynostratigraphy of Late Cretaceous subsurface sediment of southern Bornu Basin, Nigeria: Implications for depositional environments and palaeoclimatic predictions. J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-02-02 Bamidele Samuel Oretade, Ekundayo Joseph Adepehin, Peter Sunday Ola
Sedimentary records are helpful in tracking ancient environments and climates. By analysing Late Cretaceous subsurface sediment from the Gaibu-1 Well in the southern Bornu Basin, Nigeria, predominantly arenaceous lithologies were identified, and five stratigraphic sub-divisions were recognised: Bima, Yolde, Gongila, Fika (Upper, Middle, and Lower members), and Gombe Formations. Palynozonation facilitated
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Structural analysis, tectonic fracturing modeling, and kinematic evolution along the South Atlas Fault at the northern border of the Tinghir-Errachidia-Boudenib basin (Pre-African Trough, Morocco) J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-01-31 Mostapha Bouzekraoui, Brahim Es-Sabbar, Brahim Karaoui, Mourad Essalhi, Mohamed Saadi
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Storage, flow and contamination of groundwater in bioturbated strata: Example from the upper Jubaila Formation, Saudi Arabia J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-01-29 Hassan A. Eltom, Hussam Eldin Elzain, Mohamed A. Yassin
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Landslide hazard assessment and mapping at national scale for Malawi J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-01-29 Y. Thiery, H. Kaonga, H. Mtumbuka, M. Terrier, J. Rohmer
Malawi, a landlocked country characterized by its mountainous terrain crisscrossed by the Great Rift Valley and Lake Malawi, is facing an increasing threat of landslides primarily triggered by heavy rainfall from tropical cyclones and depressions. While there are general landslide susceptibility maps available on a global and continental scale, Malawi lacks its own specific landslide hazard maps that
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Morphostructure, paleostress and kinematics of the southern kilombero rift basin, southern Tanzania J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-01-27 Godfrey Richard Keraka, Athanas S. Macheyeki, Marco Shaban
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Tectonic reactivation and ore-forming fault systems from the west African Craton margin (Saghro, Anti Atlas, Morocco) J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-01-25 Ayoub Aabi, Younes Hejja, Abdellah Nait Bba, Mustapha Boujamaoui, Lahssen Baidder, Mohammed El Azmi, Lhou Maacha, Abderrazak Hamzaoui
This study provides interpreted aeromagnetic databases combined with structural and metallographic investigation to examine the surface versus subsurface faults interaction and the tectonic pattern of fault-driven mineralization in the Southwestern Saghro massif (Eastern Anti-Atlas, Morocco). Many Precambrian inherited faults have undergone considerable tectonic remobilization, exhibiting mainly normal/strike-slip
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Integrated geospatial analysis for identifying regions of active tectonics in the Saharian Atlas, an review analysis of methodology and calculation fundamentals J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-01-26 Hassan Taib, Riheb Hadji, Younes Hamed, Matteo Gentilucci, Khaoula Badri
The present landscape configuration is influenced by structural expansions and ongoing tectonic activities, resulting in notable changes to geological features and landforms. The formation of the Atlas chain is a prime example of this, as it has been sculpted by the combined forces of erosional processes and tectonic activity. These processes have played a significant role in shaping the stream networks
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Distribution and contamination of seashells in Salwa Bay, Saudi Arabia J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-01-25 Abdelbaset S. El-Sorogy, Khaled Al-Kahtany, Mansour H. Al-Hashim, Talal Alharbi
Salwa Bay, situated near the border of Saudi Arabia and Qatar, is widely considered to be the most hypersaline region extending from the Arabian Gulf. This study focuses on detailing the occurrence and contamination of seashells in Salwa Bay. The research explores the diversity, abundance, and lifestyles of seashells across 16 sites along Salwa Bay. Additionally, the concentrations of As, Cd, Cr, Cu
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Metamorphic evolution and mineral assemblages of fassaite calc-silicate and sapphirine-quartz Al-Mg granulites from the Tekhamalt area (In Ouzzal terrane, Western Hoggar): Implications for ultra-high-temperature conditions and petrogeneses J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-01-21 Chakib Harouz, Khadidja Ouzegane, Sidali Doukkari, Zouhir Adjerid, Saida Aït-djafer
Tekhamalt area (In Ouzzal terrane Western Hoggar) is remarkable for the occurrence of quartz-sapphirine granulites associated with fassaite-bearing calc-silicate granulitesand alkaline orthogneisses. The clinopyroxenes in these calc-silicate granulites contain various contents of aluminum, with concentrations reaching up to 11.69 wt%. The Al-Mg granulites are particularly notable for the presence of
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Coupled hydrogeological modeling and nitrate transport modeling in an anthropized valley, a case study of the lower Soummam valley (Bejaïa Northeast of Algeria) J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-01-20 Dounyazad Benabbes, Farès Kessasra, Amal Foughalia, Zeyneb Khemissa, Moussa Kerouaz, El Amine Abdelloche
Anthropogenic activities, including wastewater discharges and fertilizer use, were identified as the primary factors influencing nitrate concentrations in the lower Soummam Valley in the North-East of Algeria. This study aimed to investigate nitrogen pollution and simulate nitrate mass transport coupled with a numerical flow model. Hydrogeochemical findings revealed significant seasonal variations
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Facies analysis, architectural elements, and paleoenvironmental reconstruction of alluvial deposits of the low terraces and floodplains in the Middle Sebou river (Eastern Saïss foreland basin, Morocco) J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-01-10 Imad EL Yakouti, Hicham EL Asmi, Lahcen Gourari, Mohamed Benabbou, Aziz Hayati, Mohamed Salah, El Hassane Chellai
This paper focuses on the study of the floodplain and low terrace deposits of the Middle Sebou Valley, which crosses the south-rif corridor and constitutes the eastern limit of the Saïss Basin. The study includes the identification of facies, the determination of architectural elements, the reconstruction of paleoenvironments, and the proposal of a model for deposit formation. The work is based on
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Provenance history, depositional conditions andtectonic settings during late Cenomanian – early Turonian time in the Gongola Sub-Basin of the Upper Benue Trough Nigeria: Evidence from major and trace elements geochemistry of the Kanawa shales from the Pindiga Formation J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-01-08 Usman Abubakar, Simon V. Hohl, Musa Bappah Usman, Abubakar S. Maigari, Milan Stafford Tchouatcha, Raymond Peter Tabale, Abdulwahab Muhammad Bello, Auwalu Dalha, Shehu Mukkafa
Newly analysed major and trace element compositions of the Kanawa shales deposited in the Pindiga Formation reveal the provenance history and depositional conditions during the late Cenomanian - early Turonian time in the Gongola Sub-Basin of the Upper Benue Trough. We conclude that the source of the siliciclastic detritus in the Kanawa shales of the Pindiga Formation are igneous rocks of predominantly
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Sequence stratigraphy of the foraminiferal zones F9700 and F9800 in the Niger Delta: A comprehensive litho-sequence approach J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-01-12 W.E. Osung, S.O. Onyekuru, D.O. Ikoro, C.C.Z. Akaolisa, O.E. Agbasi, K.D. Opara
Understanding how variations in relative sea level affect reservoir structure requires a thorough understanding of sequence stratigraphy. A detailed sequence stratigraphic investigation was performed on the OML X field to uncover and establish links between concurrently originating hydrocarbon reservoir deposits. The analysis of major stratigraphic surfaces, such as maximum flooding surfaces and sequence
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The Boumaadine Fe–Mn–Pb–Cu (± Au) ore deposit (Jbel Skindis, eastern High Atlas, Morocco): New insights from geological, hydrothermal alteration and geochemical investigations J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-01-11 Adnane Tobi, Mourad Essalhi, Luc Barbanson, Asma Zouggarh, Lakhlifa Benaissi, Daoud El Azmi, Rachid Majidi
Petrographic, structural and geochemical analysis combined with SEM and XRD were performed on the Boumaadine Fe–Mn–Pb–Cu (±Au) mineralization of Jbel Skindis in the eastern High Atlas, (Morocco). The results indicate a polyphasic process of mineralization, which produced orebodies with distinct features and different chemical conditions formation. The earliest mineralization formed replacement and
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Structural and alteration zones controls on Cu mineralisation in the northwest of Nain (northeastern Isfahan, Iran): A remote sensing perspective J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-01-05 Farzaneh Khademian, Zahra Alaminia, Alireza Nadimi, David R. Lentz, Ali Ghasemi, Mortaza Sharifi
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Dolomitization of early-post rift Lower Jurassic carbonate platforms along the Moroccan Atlantic Margin: Origin and significance J. Afr. Earth Sci. (IF 2.3) Pub Date : 2024-01-01 Nawwar Al-Sinawi, Cathy Hollis, Aude Duval-Arnould, Ardiansyah Koeshidayatullah, Stefan Schröder, Jonathan Redfern
Dolomitization is the most significant diagenetic process to affect Jurassic carbonate reservoirs along the Central Atlantic Margin (CAM). Despite several studies on dolomitization from different parts of CAM, the origin of these dolomites and their influence on the subsequent diagenetic evolution of Jurassic carbonate systems remains enigmatic. In addition, while dolomitization is evident at the surface
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Isimila Prehistoric Site, Tanzania: Comparative Faunal Datings and ESR, with a Reassessment J. Afr. Earth Sci. (IF 2.3) Pub Date : 2023-12-28 Maxine R. Kleindienst, Bonnie A.B. Blackwell, Anne R. Skinner
More than sixty years ago, 1957-58 University of Chicago excavations at the Isimila Prehistoric Site in the Southern Highlands of Tanzania exposed a sequence of Pleistocene deposits that included Earlier Stone Age aggregates. Now, the available correlations with extinct fauna from other dated East African localities and preliminary electron spin resonance (ESR) estimates indicate that the Isimila Formation
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Cretaceous climate change evidenced in the Senegalese rock record, NW Africa J. Afr. Earth Sci. (IF 2.3) Pub Date : 2023-12-25 M. Pearson, M. Casson, I. Millar, R. Charton, J. Redfern
Climate change directly impacts the source, mode and volume of sediment generation which can be observed in the rock record. To accurately model source to sink systems, in addition to hinterland geology, tectonics and transport distance, a thorough comprehension of the climate is essential. In this study we evaluate the role of climate on Cretaceous sediment delivery into the Senegal Basin, NW Africa
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Shale gas play of the Silurian hot shale, Ghadames Basin, North Africa: Insights from integrated geochemistry and basin modeling J. Afr. Earth Sci. (IF 2.3) Pub Date : 2023-12-25 Khaled Albriki, Wei Guoqi, Feiyu Wang, Rajab El Zaroug, Abdulati Abdullah
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Compositional data analysis (CoDA) and geochemical signatures of the terminal complex aquifer in an arid zone (northeastern Algeria) J. Afr. Earth Sci. (IF 2.3) Pub Date : 2023-12-19 Reghais Azzeddine, Drouiche Abdelmalek, Ugochukwu Ewuzie, Zahi Faouzi, Debieche Taha-Hocine
The Biskra region, one of the arid regions in North-East Algeria, has known remarkable agricultural development, necessitating additional mobilization of groundwater resources, which are almost the only source of water in the region. In the long term, this heavy mobilization may threaten the quantity and quality of groundwater. This study was carried out to gain a better understanding of groundwater
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Quantitative biostratigraphy of the Miocene-Pleistocene succession in Sapphire field, offshore Nile Delta, Egypt J. Afr. Earth Sci. (IF 2.3) Pub Date : 2023-12-23 Walid G. Kassab, Ahmed A. Abdelhady, Rehab Y. Helmy, Mohamed S. Hammad, Ahmed Zakaria, Mohamed S. Ahmed, Fatma Shaker
A high-resolution quantitative nannoplankton biostratigraphy has been established in four wells based on a total of 1241 subsurface samples to understand and improve hydrocarbon exploration and recovery in the offshore Nile Delta. Ninety-two nannofossil species were used to delineate stages/ages boundaries of the Miocene-Pleistocene succession and to construct the age-depth model. Empirical, semi-quantitative
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A new sedimentary and biostratigraphic framework for the Callovian-Oxfordian transition on the Atlantic margin of Morocco J. Afr. Earth Sci. (IF 2.3) Pub Date : 2023-12-21 Aude Duval-Arnould, Luc Bulot, Moussa Masrour, Mike Simmons, Alain Bonnot, Rémi Charton, Jonathan Redfern, Stefan Schröder
A major global marine transgression occurred during the Callovian to Early Kimmeridgian, which was interrupted locally by a hiatus during the Late Callovian to Early Oxfordian. The transgression may have been a major driver for extensive coral buildup development in the Oxfordian. The depositional hiatus may be related to a combination of eustasy, local tectonic activity and hinterland movements, highlighting
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Geophysical contribution using electrical resistivity to study the Triassic sandstone aquifer, southeastern Tunisia J. Afr. Earth Sci. (IF 2.3) Pub Date : 2023-12-21 Nesrine Frifita, Kevin Mickus, Mongi Ben-Zaied, Abdelhakim Bouajila, Salah Mahmoudi, Mohamed Ouessar
A study was conducted to analyze the electrical resistivity structure of the Triassic Sandstone Aquifer in southeastern Tunisia in regions without constraints from nearby well data. The aim was to determine how the geometry, depth, thickness, and lateral extension of the aquifer within the Medenine region. Seven profiles, including two-dimensional profiles and vertical electrical soundings, were collected
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The origin and emplacement of the Freetown Intrusion, Sierra Leone J. Afr. Earth Sci. (IF 2.3) Pub Date : 2023-12-16 John F.W. Bowles, Ian C. Lyon, Jennifer L.C. Stewart, Saioa Suárez, David J. Vaughan
The Freetown Intrusion in Sierra Leone is a large, layered mafic intrusion. Only a small part of the intrusion appears on land to form the Freetown Peninsula, and the larger part lies beneath the Atlantic Ocean. This is demonstrated by gravity and geomagnetic measurements, which also indicate that intrusion occurred over at least 1–2 Ma. The intrusion was formed at 196–201 Ma and is, therefore, concordant
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Taphonomic damage of molluscan shells in the Nile Delta under natural and anthropogenic sources of environmental variability J. Afr. Earth Sci. (IF 2.3) Pub Date : 2023-12-17 Ahmed Awad Abdelhady, Hatem F. Hassan, Basma A.A. Balboul, Khalaf H.M. Abdel-Raheem, Aziz Abu Shama, Mohamed Ahmed, Ali M. Hussain
Environmental reconstruction can benefit from the interpretation of the postmortem history of shell remains. The molluscan death assemblages obtained from grab samples at forty-nine sites in the Manzala lagoon, the largest lagoon in the Nile Delta, were analyzed to infer the taphonomic alteration. The preservation of shells at each site has been semi-quantitatively ranked based on the taphonomic features
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New and emerging technologies in paleontology and paleobiology: A horizon scanning review J. Afr. Earth Sci. (IF 2.3) Pub Date : 2023-12-16 Ahmed A. Abdelhady, Barbara Seuss, Sreepat Jain, Khalaf H.M. Abdel-Raheem, Ahmed Elsheikh, Mohamed S. Ahmed, Ashraf M.T. Elewa, Ali M. Hussain
A systematic horizon scanning was undertaken to identify the up-to-date perspectives on paleontological research. A summarized evaluation (applicability and acceptability) was also provided to identify the challenges and opportunities of paleontological techniques. Present-day advances in molecular analyses and scanning techniques generate valuable new data to test old and recent systematic problems
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Potential geothermal reservoir systems in the Kenyan Great Rift Valley and volcanic region assessed by ambient noise analysis J. Afr. Earth Sci. (IF 2.3) Pub Date : 2023-12-16 Chanmaly Chhun, Takeshi Tsuji, Tatsunori Ikeda
To identify potential geothermal reservoirs in the Kenyan Great Rift, we analyzed ambient noise data to reveal seismic velocities and map azimuth-based Rayleigh-wave phase velocities. We extracted phase velocity dispersion curves from the ambient noise cross-correlation using the zero-crossing method and constructed S-wave velocity models using 3D surface-wave tomography. S-wave velocities were lower
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Diatreme-hosted fluorite mineralization in S-Namibia – A tale of cryogenic brine formation and fluid mixing below an unconformity in the context of Pangea rifting J. Afr. Earth Sci. (IF 2.3) Pub Date : 2023-12-14 Benjamin F. Walter, R. Johannes Giebel, Jorge C.L. Arthuzzi, Lorenz Kemmler, Jochen Kolb
The Garub fluorite deposit in south Namibia is hosted by a Neoproterozoic tuffisite diatreme which is cut by a hydrothermal vein with base metal mineralization. Petrographic observations indicate a single hydrothermal event producing a paragenesis of fluorite-baryte with base metal sulfides, quartz and carbonates. Microthermometry data from fluid inclusions show that hydrothermal fluorite and baryte