Journal of African Earth Sciences最新文献

{"title":"Fluid inclusion characteristics and hydrocarbon accumulation stages in lower Cretaceous reservoirs of the central low-uplift zone, central African Doseo basin","authors":"Xiuwei Wang ,&nbsp;Zhiming Zhang ,&nbsp;Bo Qiao ,&nbsp;Xin Wang ,&nbsp;Jun Wang ,&nbsp;Yifan Song ,&nbsp;Yong Chen","doi":"10.1016/j.jafrearsci.2025.105820","DOIUrl":"10.1016/j.jafrearsci.2025.105820","url":null,"abstract":"<div><div>Research on hydrocarbon accumulation stages in the central low-uplift zone of the Doseo Basin remains scarce, limiting effective exploration efforts in this region. This study investigates fluid inclusions in Lower Cretaceous sandstone reservoir samples using petrographic analysis, microthermometry, and Raman spectroscopy. The results reveal two distinct types of hydrocarbon inclusions. Type I inclusions, primarily distributed along quartz grain fractures and secondary growth margins, formed during the early to middle stages of diagenesis and exhibit yellow-green fluorescence, indicating low-maturity oil filling. Type II inclusions, associated with high-maturity oil filling, developed post-secondary growth along quartz micro-fissures and dissolved feldspar particles, with fluorescence varying from yellow-green to blue-white. The Kedeni reservoirs underwent two hydrocarbon charging phases: an early phase (∼105–85 Ma) characterized by crude oil filling (homogenization temperatures: 90–110 °C) and a later phase (∼50–43 Ma) dominated by natural gas and condensate accumulation (homogenization temperatures: 120–140 °C). These results provide valuable insights into the hydrocarbon generation mechanisms and reservoir evolution in the Doseo Basin.</div></div>","PeriodicalId":14874,"journal":{"name":"Journal of African Earth Sciences","volume":"232 ","pages":"Article 105820"},"PeriodicalIF":2.2,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geochronology of mafic and felsic rocks at the Mundonguara Mine: Insights into the chronostratigraphy of Archean greenstones within the Zimbabwe Craton","authors":"Laura N. Mendes ,&nbsp;Olof Martinsson ,&nbsp;Daud L. Jamal ,&nbsp;Christina Wanhainen","doi":"10.1016/j.jafrearsci.2025.105821","DOIUrl":"10.1016/j.jafrearsci.2025.105821","url":null,"abstract":"<div><div>The Zimbabwe Craton comprises a typical Archean TTG (tonalite-trondhjemite-granodiorite)-greenstone terrain. In this study we contribute with geochronological results from the Manica Greenstone Belt in Mozambique. The Manica Group constitutes the eastern extension of the Odzi-Mutare-Manica Greenstone Belt and comprises the Macequece Formation dominated by komatiitic rocks in its lower part and the sedimentary dominated M'Beza-Vengo Formation on top. U–Pb zircon data from this study yield crystallization ages between ca. 2.91 and ca. 2.94 Ga, reflecting two distinct magmatic episodes: (1) the intrusion of mafic dykes and granitoids into older komatiitic rocks, and (2) the emplacement of a rhyolitic volcanic unit within the Macequece Formation. These results indicate that the upper, more evolved mafic to felsic units of the formation were formed over a relatively short time interval during the late Archean. In contrast, the underlying komatiitic sequences currently lack precise age constraints. Overall, the data suggests that a major magmatic phase occurred around ca. 2.93 Ga, representing a significant stage in the development of the Macequece Formation. Based on these ages the Macequece Formation belongs to the 3.0–2.8 Ga Lower Greenstones of the Bulawayan Supergroup. However, similar ca. 2.9 Ga greenstone units are rare within the Zimbabwe Craton and in most cases lack significant amounts of komatiite rocks. A major unconformity is indicated by a ca. 170 Ma time gap between the Macequece Formation and the overlying M'Beza-Vengo Formation, suggesting the absence of stratigraphy intervals common in other greenstone belts within the Bulawayan Supergroup. The lower intercept ages between ca. 578 and ca. 856 Ma indicated that the Manica Group and surrounding TTG basement were affected by Neoproterozoic tectono-thermal events. The age of ca. 578 Ma is consistent with overprinting related to the Pan-African orogeny, while the older ages of 704–846 Ma coincide with bimodal magmatism associated with the Rodinia breakup. In particular, they also correlate well with the newly recognized 724–712 Ma Mutare-Fingeren Large Igneous Province, which affected the eastern Kalahari Craton.</div></div>","PeriodicalId":14874,"journal":{"name":"Journal of African Earth Sciences","volume":"232 ","pages":"Article 105821"},"PeriodicalIF":2.2,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144902914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial change in carbonate precipitation and weathering in response to the Paleocene-Eocene Thermal Maximum warming from northern Iraq","authors":"Ali Al-Juboury ,&nbsp;Noor T. Al-Taee ,&nbsp;Ahmed N. Al-Fattah ,&nbsp;Mohammed A. Al-Haj ,&nbsp;Imad M. Ghafor ,&nbsp;Ahmed H. Al-Obeidi ,&nbsp;David L. Dettman ,&nbsp;Rowe Harry ,&nbsp;Giovanni Zannoni ,&nbsp;Raafat M. El Attar ,&nbsp;Nasir Alarifi","doi":"10.1016/j.jafrearsci.2025.105824","DOIUrl":"10.1016/j.jafrearsci.2025.105824","url":null,"abstract":"<div><div>This study is a maiden attempt to investigate paleoenvironmental changes in northern Iraq at the time of the Paleocene-Eocene Thermal Maximum (PETM), focusing on carbonate precipitation and continental weathering dynamics. Two outcrop sections were analyzed; the Sinjar Formation at Dokan (northeastern Iraq) and the Aaliji Formation at Sinjar (northwestern Iraq). X-ray diffraction supplemented by scanning electron microscopy, major oxide geochemistry and carbonate stable isotopic data reveal an overall increase in carbonate precipitation during the PETM, with localized variations in dolomite indicating evaporative conditions shaped by paleogeographic and depositional settings. The high kaolinite-to-smectite and Sr/Ca elemental ratios suggest that humid conditions persisted during the recovery phase of the PETM, implying a shift into a more stable, humid climatic state following the hyperthermal event. Additionally, the PETM onset is marked by the emergence of kaolinite and a gradual rise in Chemical Index of Alteration (CIA) values indicating increased continental weathering and pedogenesis brought on by a warmer, wetter climate which may link to influence of both chemical weathering and physical (erosion). These findings provide new insights into how hyperthermal events could influence regional weathering, carbon cycling, and climate systems along the Tethyan margin.</div></div>","PeriodicalId":14874,"journal":{"name":"Journal of African Earth Sciences","volume":"232 ","pages":"Article 105824"},"PeriodicalIF":2.2,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144890923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-scale characterization of carbonate reservoir quality, diagenesis, and microfacies in the upper cretaceous khasib formation, South Iraq","authors":"Ali Mohammed Mezaal Alkareemawi,&nbsp;Hijaz Kamal Hasnan,&nbsp;Khairul Azlan Mustapha","doi":"10.1016/j.jafrearsci.2025.105819","DOIUrl":"10.1016/j.jafrearsci.2025.105819","url":null,"abstract":"<div><div>Despite the significance of the Khasib Formation as a carbonate reservoir in the Halfaya oil field, comprehensive characterization integrating microfacies architecture, depositional environments, diagenetic processes, reservoir pore systems, and synergistic microfacies-electrofacies relationships remains absent in this area. This study presents an integrated reservoir characterization approach utilizing thin section petrography, scanning electron microscopy, X-ray diffraction, electrofacies analysis, Formation Micro Imager, and thorium/uranium ratio to evaluate the Khasib Formation reservoir properties. Six distinct microfacies (MF) were identified, representing deposition across inner, middle, and outer ramp settings. MF2 (allochems-calcispheres packstone) and MF5 (molluscan packstone) exhibit superior reservoir quality, deposited in high-energy shoal and flank shoal environments. These findings align with electrofacies analysis, where EF2 and EF5 demonstrate enhanced petrophysical characteristics. Diagenetic processes significantly influenced Khasib reservoir quality, with dissolution substantially improving porosity in MF2 and MF5, while calcite cementation, pyritization, stylolitization, and dolomite cementation negatively impacted reservoir performance. Vuggy and moldic pores constitute the primary contributors to enhanced porosity in these optimal reservoir intervals. The integrated FMI-SEM approach proved effective in characterizing vuggy pore systems, and offers significant applications for carbonate reservoir development through improved reservoir quality prediction and enhanced flow unit identification. This multi-scale characterization provides a better understanding of Khasib reservoir in the studied field and the adjacent areas, leading to a better reservoir development plans and optimized production strategies.</div></div>","PeriodicalId":14874,"journal":{"name":"Journal of African Earth Sciences","volume":"232 ","pages":"Article 105819"},"PeriodicalIF":2.2,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mapping barite vein-type deposits using Sentinel-2 data and fused spectral methods in a Paleozoic sedimentary cover (Eastern Anti-Atlas)","authors":"Zakaria Adiri ,&nbsp;Abdellah Nait-Bba ,&nbsp;Ayoub Aabi ,&nbsp;Amine Jellouli ,&nbsp;Mohcine Chakouri ,&nbsp;Abdelhakim Jilali","doi":"10.1016/j.jafrearsci.2025.105818","DOIUrl":"10.1016/j.jafrearsci.2025.105818","url":null,"abstract":"<div><div>In Morocco, the southern part of the Saghro massif (Eastern Anti-Atlas) includes various economic deposits, including those of Barite (Ba). Previous studies revealed the high potential of these mineralizations, which are structurally controlled by a fault network. This study aims to improve the detection accuracy of barite by using fused remote sensing techniques with Sentinel-2 satellite imagery. This task was completed by comparing different methods, including independent component analysis (ICA), mixture-tuned matched filtering (MTMF), and spectral angle mapper (SAM) methods. These latter include novel fused classifications, namely directed ICA-MTMF (DIM) and directed ICA-SAM (DIS). The obtained results were checked and validated by a previous geological study, field observation, radar Sentinel-1 data, and the calculation of accuracy metrics. The analysis showed that the fused methods (especially the DIM classification) gave better results than the others. The combination of the high spatial resolution of Sentinel-2 data (10 m) and DIM fused classification allowed mapping the targeted veins accurately. Therefore, the adopted methodology can be applied to mineralogical and geological exploration and other remote sensing applications.</div></div>","PeriodicalId":14874,"journal":{"name":"Journal of African Earth Sciences","volume":"232 ","pages":"Article 105818"},"PeriodicalIF":2.2,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144890924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Petrophysical and structural evaluation of the Jurassic Khatatba Formation (Lower Safa Member) in JG Field, Abu Gharadig Basin, Western Desert, Egypt","authors":"El Sayed Selim ,&nbsp;Mohammad Abdelfattah Sarhan","doi":"10.1016/j.jafrearsci.2025.105817","DOIUrl":"10.1016/j.jafrearsci.2025.105817","url":null,"abstract":"<div><div>This research assessed the hydrocarbon prospectivity of the Lower Safa Member (Khatatba Formation) of the JG Field, Abu Gharadig Basin (AGB), Egypt, for future exploration in the AGB and comparable basins. Twenty-nine seismic lines and five wells' wireline logs (JG-8 ST, JG-5 ST, JG-1 ST, JG-13, and JG-16) were utilized to examine the reservoir's structural and petrophysical properties. Seismic interpretation provided a fault-controlled pattern of NE-SW and NW-SE striking normal faults that form 3-way dip closures. Petrophysical analyses revealed reservoir zones with net pay thicknesses up to 50 m, effective porosity of 13–21 %, low shale content of 2–10 %, hydrocarbon saturation of 50–95 %, and low BVW (0.01–0.08). Core photo analysis of the JG-8 well revealed six different lithofacies, e.g., laminated shales, silty shales, and well-sorted sandstones. These are in accordance with interpretations of various depositional environments, e.g., fluvial channels, deltaic distributary systems, and floodplain to marginal marine environments. These findings highlighted the multi-facies architecture and structural compartmentalization of the Lower Safa Member and demonstrated its strong reservoir potential and regional exploration significance.</div></div>","PeriodicalId":14874,"journal":{"name":"Journal of African Earth Sciences","volume":"232 ","pages":"Article 105817"},"PeriodicalIF":2.2,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144864080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Machine learning-based lithological mapping and mineral prospecting using hyperspectral and multispectral remote sensing in Wadi Halfa, north Sudan","authors":"Abazar M.A. Daoud ,&nbsp;Ali Shebl ,&nbsp;Mutwakil Nafi ,&nbsp;Abdelmajeed A. Elrasheed ,&nbsp;Árpád Csámer ,&nbsp;Péter Rózsa","doi":"10.1016/j.jafrearsci.2025.105816","DOIUrl":"10.1016/j.jafrearsci.2025.105816","url":null,"abstract":"<div><div>At present, the global demand for mineral resources is critical, leading nations to focus on exploration. Remote sensing is a cost-effective tool, especially in harsh terrains. This study conducted lithological mapping in Wadi Halfa, North Sudan, using algorithm-based remote sensing, field observations, and petrographical analysis to detect iron ore and barite deposits. Multisensor optical datasets (L9, L8, and S2) were integrated to effectively delineate the lithological units. In addition, PRISMA hyperspectral data, with its detailed spectral signatures, improved spatial distribution patterns of barite and iron oxides across the study area. Image processing techniques (false colour composites, principal component analysis, minimum noise friction, band ratios) detected hydroxyl-bearing minerals, ferric, and ferrous oxides. Support Vector Machine (SVM), Artificial Neural Network (ANN), and Mahalanobis Distance Classifier (MDC) achieved overall accuracies of 95.51 %, 94.59 %, and 98.99 %, respectively. The study helped interpret the spatial relationship between barite and iron oxides. Four types of iron ore with more than three distinct layers were identified, including (a) oolitic ironstone, (b) ferruginous sandstone, (c) ferruginous ironstone, and (d) Banded Iron Formation (BIF) during field investigations, petrographic examinations, and chemical analysis validated remote sensing findings, revealing iron ore (62.7 % Fe) and barite (63.9 % Ba) concentrations. An economic assessment confirmed the presence of economic reserves suitable for exploitation. This research is recommended for broader application, particularly in machine learning for delineating iron ore and barite deposits in complex sedimentary sequences. The realization of machine learning algorithms emphasizes their potential to enhance lithological mapping in sedimentary sequences, suggesting a promising direction for future research.</div></div>","PeriodicalId":14874,"journal":{"name":"Journal of African Earth Sciences","volume":"232 ","pages":"Article 105816"},"PeriodicalIF":2.2,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144852070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Non-marine Bivalvia of the mid-Cretaceous Kem Kem Group of southeastern Morocco","authors":"Kiera E. Franklin ,&nbsp;Martin C. Munt ,&nbsp;David M. Martill ,&nbsp;Samir Zouhri ,&nbsp;Roy E. Smith","doi":"10.1016/j.jafrearsci.2025.105813","DOIUrl":"10.1016/j.jafrearsci.2025.105813","url":null,"abstract":"<div><div>Invertebrate fossils are rare in the famously vertebrate-rich mid-Cretaceous Kem Kem Group of southeastern Morocco. This study presents the first detailed account of freshwater bivalves from this important stratigraphic unit. The fossils described originate from the Ifezouane Formation, the lower sandy unit of the group. The superfamily Trigonioidoidea is represented by <em>Monginella</em> cf. <em>flattersensis</em>, the new genus <em>Goumardonaia</em> introduced for ?<em>Monginella radieri</em> and the new genus and species <em>Kemkemnaia parvum</em> (Desertellidae). Specimens referred to the Unionidae include the new species <em>Unio radleyi</em>, which with <em>Kemkemnaia parvum</em> are potentially endemics. This study reveals a previously unrecognised freshwater bivalve diversity in the mid-Cretaceous deposits of North Africa. Most of the bivalve specimens are fragmentary, reflecting the dynamic fluvial environment of the Kem Kem Group, and are preserved as ferruginous sandstone internal moulds.</div></div>","PeriodicalId":14874,"journal":{"name":"Journal of African Earth Sciences","volume":"232 ","pages":"Article 105813"},"PeriodicalIF":2.2,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144887404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Urban growth or urban risk? Unraveling the flood paradox in Kumasi (Ghana) through the lens of natural factors and spatial decision modeling","authors":"Stephen Biliyitorb Liwur ,&nbsp;Jacob Nchagmado Tagnan ,&nbsp;Pearl Seyram Asamoah","doi":"10.1016/j.jafrearsci.2025.105814","DOIUrl":"10.1016/j.jafrearsci.2025.105814","url":null,"abstract":"<div><div>Amid accelerating urbanization across the global landscape, urban sustainability finds itself in a precarious balance, particularly in the face of increasing flood risks. As such, this study aims to assess and map flood risk in Kumasi. Methodologically, this study is grounded in the analytical hierarchy process (AHP) spatial decision modelling approach to unearth the varied impacts of natural and urban factors on flood susceptibility in the city. Consequently, the resulting model reveals that approximately 98 % of the city is moderately to highly susceptible to flooding. This model result is supported by a validation assessment with an overall accuracy of 95 % and a Kappa coefficient of 0.91, emphasizing the urgency for actionable flood management and resilient urban planning. The model also points out that natural terrain variables including elevation (β = 0.1324, p &lt; 0.001), slope (β = 0.0707, p &lt; 0.001), topographic wetness index (β = 0.1062, p &lt; 0.001), drainage density, and proximity to rivers and urban development dynamics (Normalized Difference Vegetation Index: β = 0.0402, p &lt; 0.001, and Land use and land cover: β = 0.0201, p &lt; 0.046) are major predictors of flood susceptibility. Consequently, this study calls for a paradigm shift toward spatially integrated urban governance, anchored in proactive spatial planning, informed land use policies, and hydrologically responsive infrastructure design for the city.</div></div>","PeriodicalId":14874,"journal":{"name":"Journal of African Earth Sciences","volume":"232 ","pages":"Article 105814"},"PeriodicalIF":2.2,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144996609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Oligo-Miocene Alpine tectonic evolution and related igneous activity along the Central-Eastern Algerian margin","authors":"Fatiha Abbassene ,&nbsp;Hervé Bellon ,&nbsp;Alain Coutelle ,&nbsp;Ouardia Belanteur ,&nbsp;M'Hammed El Azzouzi","doi":"10.1016/j.jafrearsci.2025.105811","DOIUrl":"10.1016/j.jafrearsci.2025.105811","url":null,"abstract":"<div><div>The Miocene calc-alkaline igneous activity in Northern Algeria is restricted to a narrow (50 km) coastal zone along the Mediterranean Sea. It occurs either in the external or in the internal units of the Alpine Tellian belt. The latter resulted from three episodes of nappe thrusting between Lower Burdigalian and Middle Tortonian. Comparatively, K-Ar ages of igneous rocks span between 17 and 9 Ma. The intensity of the various tectonic phases varies by sector through the Tellian belt. Between the three periods of thrusting, a significant detrital sedimentation took place and was accompanied by emplacement of calc-alkaline igneous materials as plutonic and/or volcanic bodies.</div><div>The main objective of this study is to outline the relationships between Miocene igneous eruptions and their associated sedimentary formations that make up a key portion of the Algerian Alpine belt. For this purpose, we gathered geochronological, geochemical and isotopic data from Miocene cal-alkaline igneous rocks emplaced over more than 800 km near the Algerian coast. In some sectors, the emplacement of igneous rocks within the sedimentary series allows a direct observation of their relationships. K-Ar ages carried on calc-alkaline igneous rocks collected between Tenes-Cherchel and Cap de Fer sectors range from 17.0 Ma to 9.10 Ma. Stratigraphic columns exhibit three successive tectonic cycles at 17 Ma, 15 Ma, and 9 Ma, which correspond to the three southward thrusting events (Burdigalian, Langhian and Tortonian) of Kabylian terranes responsible for the Alpine nappe stack. In various locations, these nappes include igneous rocks as volcanic levels or plutonic bodies. These new results, together with a critical review of previous studies, allow us to discuss the consistency between paleogeography, tectono-magmatic pulses and petro-geochemical evolution of northern Algeria after the closure of the Alpine Tethys.</div></div>","PeriodicalId":14874,"journal":{"name":"Journal of African Earth Sciences","volume":"232 ","pages":"Article 105811"},"PeriodicalIF":2.2,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144879949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}