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Bulletin Analytique Ministère Des Mines Agence du Service Géologique de l'Algérie Division Géo-Information Département Documentation Bibliothèque des Sciences de la Terre Bulletin Analytique NALES & TIO IN A TE N R S N N A O I T I T O A N C A I L L E B S U P 2020 MINISTERE DES MINES AGENCE DU SERVICE GEOLOGIQUE DE L’ALGERIE Division Géo-Information Département Documentation BIBLIOTHEQUE DES SCIENCES DE LA TERRE PRESENTATION La Bibliothèque des Sciences de la Terre (BST) de la Division Géo-Information /Département Documentation, placée sous l’autorité de l’Agence du Service Géologique de l’Algérie, diffuse annuellement 1 numéro du Bulletin Analytique fournissant aux usagers des références bibliographiques de publications reçues par la BST dans le cadre des échanges avec les organismes étrangers, d’abonnements et d’ouvrages de bases acquis. La Bibliothèque des Sciences de la Terre est ouverte au public pour consultation de son fonds documentaire aux horaires suivants : du Dimanche au Jeudi 8h 00 - 12h 00 13h 00 -16h 00 Agence du Service Géologique de l’Algérie Bibliothèque des Sciences de la Terre 18A, Avenue Mustapha EL Ouali (ex Debussy) - Alger 16.000 BULLETIN ANALYTIQUE 2020 S O M M A I R E Energie…………………………………………………………………………………….. 5 Géologie Structurale……………………………………………………………………… 6 Stratigraphie………………………………………………………………………………. 8 Sédimentologie…………………………………………………………………………….. 9 Géologie régionale – Cartes………………………………………………………………. 12 Paléontologie……………………………………………………………………………….. 15 Minéralogie…………………………………………………………………………………. 21 Géologie Minière……………………………………………………………………………. 23 Géochimie…………………………………………………………………………………… 26 Hydrologie…………………………………………………………………………………… 29 Géophysique…………………………………………………………………………………. 31 Géomorphologie……………………………………………………………………………… 32 Environnement……………………………………………………………………………….. 34 INDEX DES REVUES……………………………………………………………………….. 35 3 BULLETIN ANALYTIQUE 2020 ENERGIE 1 : Evaluation of source rock potential and hydrocarbon composition of oil sand and associated clay deposits from the Eastern Dahomey Basin, Nigeria. MOHAMMED S., OPUWARI M., TITINCHI S. Keywords : Gas chromatography ; Oil sand ; Pyrolysis ; Source rock ; Dahomey basin ; Nigeria. Abstract : Oil sands are classified as unconventional hydrocarbon plays and are being exploited to augment global energy needs. Nigeria has the largest conventional oil industry in Africa, but is also endowed with abundant oil sand deposits found within the Afowo Formation of the Eastern Dahomey Basin. In this study, outcrop samples of clay, oil sand, and bitumen seepage from a forestry reserve (J4) in Ogun State, South Western Nigeria were evaluated for organic matter maturity and hydrocarbon composition. Pyrolysis results for the clay indicate that the total organic carbon ranges from 5.95 to 18.46 wt % with a maturation temperature (Tmax) within the range of 417-426 °C. A complementary gas chromatography (GC) analysis of the free hydrocarbons in the clay reveals that both light and heavy hydrocarbon components are present. In contrast, oil sand and bitumen contain mostly heavy end hydrocarbon components with hydrocarbon chains C6-C12 missing, confirming oil biodegradation. This study demonstrates that these oil sands and clays represent viable exploration targets. With vast oil sand deposits in the Eastern Dahomey Basin, exploration and exploitation of this resource will open new frontiers to increase Nigeria’s hydrocarbon production. In : Journal of African Earth Sciences ; vol. 160, 2019, 103603 – 8 p. 2 : Potentiel de production d’hydrogène par électrolyse en utilisant l’énergie photovoltaïque comme source d’électricité. M’RAOUI A. Mots-clés : Energie renouvelable ; Hydrogène ; Production ; Energie photovoltaïque ; Electricité ; Algérie Résumé : L’augmentation de la part des combustibles à zéro carbone, dans l’approvisionnement énergétique, contribuera efficacement à la mise en place d’un environnement plus propre et un avenir plus durable. Il est généralement admis qu’à l’avenir aucune source d’énergie unique ne dominera le marché de l’énergie et que, par conséquent, le modèle de mix énergétique est la voie à suivre, en fonction de la disponibilité des ressources utilisables dans chaque région. Le futur réseau énergétique comprendre certainement une combinaison de différentes technologies. Un système d’énergie solaire à hydrogène pour l’Algérie permettra d’étendre la disponibilité des ressources fossiles, de réduire la pollution et de mettre en place un système énergétique permanent. L’Algérie disposera ainsi d’un système énergétique lui permettant de maintenir et d’améliorer son produit national brut global, ainsi que d’améliorer la qualité de vie des citoyens. En effet, le pays reçoit plus de 3000 heures d’ensoleillement par an avec une moyenne annuelle de rayonnement solaire 1700 kWh/m2/an et 2263 kWh/m2/an sur surface horizontale au Nord et au Sud respectivement. Vu l’énorme potentiel d’énergie solaire couvrant la partie Sud, l’Algérie a une grande opportunité d’initier la production d’hydrogène, ce qui est très important notamment dans la région désertique. Le système hydrogène-solaire type et illustré schématiquement par la figure 1. Il se compose d’un générateur photovoltaïque, d’un convertisseur de puissance et d’un électrolyseur sous pression. Le système est simple, il nous a permis d’étudier la production d’hydrogène. L’unité de conversion DC/DC assure le suivi du point de puissance maximum. Sans cet appareil, la puissance de connexion directe transférée à l’ectrolyseur ne représente pas d’optimal du système. Dans le cadre du travail que nous effectuons, nous fournissons principalement des cartes du potentiel permettant d’identifier rapidement les régions à haut, moyen et faible potentiel. Cette information est utile à l’ingénieur pour la prise de décision d’investissement. In : Bulletin des Energies Renouvelables ; n° 47, 2019, p. 2-4. 5 GEOLOGIE STRUCTURALE 3 : Salt tectonics in the Maknassy-Mezzouna region of Tunisia : example of intrusive and extrusive Triassic evaporites in the central and Southern Atlas. GHANMI M.A., CHAIEB A., ZAAFOURI A. Keywords : Salt tectonics ; Salt migration ; Sedimentary loading ; Syn-sedimentary control ; Field mapping ; Tunisian central-southern atlas. Abstract : In the North African Atlas, Triassic sedimentary rocks exhibit a variety of deformation styles that are caused by the interaction between halokinesis, tectonics and sedimentation. This paper aims to present an integrated study documenting the occurrence of salt-tectonic processes in the Maknassy-Mezzouna orogenic system. The interpretation of both, field mapping and seismic data suggests the existence of a complex tectonic evolution of these Triassic evaporites, with the occurrence of Mesozoic extensional/transtensional and Tertiary compressional/transpressional tectonic regime accompanied by sedimentary loading. This evolution took place along three major events of either lateral or vertical migration of Triassic evaporites. The first one is tectonic-driven and is related to the extensional/transtensional tectonic regime, which occurred during the break-up of Pangea and rifting of Neotethyan Ocean in the Early Jurassic. The second remobilization of salt Triassic rock developed during the Cretaceous. The initial mobilization of the Triassic salt was probably induced by sedimentary loading with limited contribution of tectonic forces. During its third stage of evolution, salt Triassic rocks evolve into salt sheets due to the shortening deformation occurred during Tertiary and Quaternary in relationship with the closure of the Neotethyan realm. Salt migration controls subsidence, generates depocenter shifts and causes thickness variation of the entire post-Triassic sedimentary sequence. The signature of salt Triassic syn-sedimentary control is confirmed by thickness reduction and abrupt variation of structural dip that affects all the sedimentary pile in the flanks of salt sheets. In seismic sections the syn-sedimentary salt tectonic control is observed by geometries like pinching out, thickness reduction, onlap termination geometry as well as unconformities identified along the flanks of the salt sheets. In : Journal of African Earth Sciences ; vol. 158, 2019, 103557 – 12 p. 4 : Southern (the ) Atlas Front in Tunisia and its foreland basin : structural style and regional-scale deformation. MASROUHI A., GHARBI M., BELLIER O. Keywords : Balanced cross-sections ; Tectonic inversion ; Structural inheritance ; Southern Atlas Front ; Tunisia. Abstract : Surface and subsurface data together with balanced cross-sections are used to emphasize the structural style and regional-scale deformation of the Southern Atlas Front in Tunisia and its foreland basin. This E-trending shaped belt reflects successive tectonic events. Mixed thick-and thin-skinned structural style characterizing this belt is defined by shallow thrusts rooted down into deep E-trending basement thrusts with major decollement level located within Triassic salt. A NW-trending system is also recognized in the front and particulary responsible for located within Triassic salt A NW-trending system is also recognized in the front and particularly responsible for the belt’s curved shape, which probably acts as transfer areas between the wide-ranging E-trending major structures. The intermediate areas are characterized by salt tectonics probably active during Jurassic and Lower Cretaceous, in response to active synsedimentary normal faults and differential sedimentation loading. The shortening amount varies and decreases
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