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Auteur Ahcène Bourefis |
Documents disponibles écrits par cet auteur (8)
Affiner la recherche Interroger des sources externes"Cadre Sédimentologique et Paléoenvironnemental des Formations mio-pliocènes de la région de Guerrara" / Smaine Chellat
Titre : "Cadre Sédimentologique et Paléoenvironnemental des Formations mio-pliocènes de la région de Guerrara" : (Ghardaïa, Algérie) Type de document : texte imprimé Auteurs : Smaine Chellat, Auteur ; Abderrezak Djerrab, Directeur de thèse ; Ahcène Bourefis, Directeur de thèse Editeur : constantine [Algérie] : Université Constantine 1 Année de publication : 2014 Importance : 164 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Sciences de la terreTags : Sahara. Algérie. Sédimentologie. Stratigraphie. Quartz. Diffractométrie
"The Sahara. Algeria. Sedimentology. Stratigraphy. Quartz.
Diffractometry"
صحراء،الجزائر، علم الرسوبيات،علم التطبيق،كوارتز،تحليل بالأشعة السينيةIndex. décimale : 550 Sciences de la terre Résumé : "The purpose of the sedimentological, sequential study and paleoenvironnemental
realized on badly consolidated sandstones of Mio-pliocene of the area of Guerrara, are
to reconstitute the positioning of these formations in the geological and environmental
context total of Algeria. The geological recognition of the site and the series of analyses
of laboratory realized reveal that this detrital formation of the continental terminal or
latest (Neogene) probably occurred after a strong deterioration of the tertiary and
mesozoïc formations. This series is made up of two principal sequences; MSII of
higher Miocene and MSIII of Pliocene, which are separated by regional discontinuities
d0, d3, d4. The means of transport dominating and the conditions of deposit reveal an
endoreic area (basin), as testifies the presence of certain argillaceous minerals
(palygorskite). The predominance of the blunted quartz grains in upper miocene
presenting of the siliceous globules reveals a hydrous dominating mode. This formation
settled in a frankly continental field under a mode of fluviatile and wind mixed
transport. The mio-pliocene formation is notched, in North and the South, by many
Wadis, which occurred after the lowering of the static levels of alluvial groundwater at
the end of the Tertiary period. These static variations are revealed by the sedimentopedogenic
cycles (sedimentary sequences). The surface quality of the grains the
processions mineral and the sedimentary sequences reveal an alternation of perios to
steppe climate, and periods with hot and wet climate at the top of each sets of this
formation. The round quartz grains with traces of multiple shocks, packed by iron
oxides, testify the end to a hydrous cycle and installation to the desert conditions."
Diplôme : Doctorat en sciences En ligne : ../theses/sc-terre/CHE6587.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9699 "Cadre Sédimentologique et Paléoenvironnemental des Formations mio-pliocènes de la région de Guerrara" : (Ghardaïa, Algérie) [texte imprimé] / Smaine Chellat, Auteur ; Abderrezak Djerrab, Directeur de thèse ; Ahcène Bourefis, Directeur de thèse . - constantine [Algérie] : Université Constantine 1, 2014 . - 164 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Sciences de la terreTags : Sahara. Algérie. Sédimentologie. Stratigraphie. Quartz. Diffractométrie
"The Sahara. Algeria. Sedimentology. Stratigraphy. Quartz.
Diffractometry"
صحراء،الجزائر، علم الرسوبيات،علم التطبيق،كوارتز،تحليل بالأشعة السينيةIndex. décimale : 550 Sciences de la terre Résumé : "The purpose of the sedimentological, sequential study and paleoenvironnemental
realized on badly consolidated sandstones of Mio-pliocene of the area of Guerrara, are
to reconstitute the positioning of these formations in the geological and environmental
context total of Algeria. The geological recognition of the site and the series of analyses
of laboratory realized reveal that this detrital formation of the continental terminal or
latest (Neogene) probably occurred after a strong deterioration of the tertiary and
mesozoïc formations. This series is made up of two principal sequences; MSII of
higher Miocene and MSIII of Pliocene, which are separated by regional discontinuities
d0, d3, d4. The means of transport dominating and the conditions of deposit reveal an
endoreic area (basin), as testifies the presence of certain argillaceous minerals
(palygorskite). The predominance of the blunted quartz grains in upper miocene
presenting of the siliceous globules reveals a hydrous dominating mode. This formation
settled in a frankly continental field under a mode of fluviatile and wind mixed
transport. The mio-pliocene formation is notched, in North and the South, by many
Wadis, which occurred after the lowering of the static levels of alluvial groundwater at
the end of the Tertiary period. These static variations are revealed by the sedimentopedogenic
cycles (sedimentary sequences). The surface quality of the grains the
processions mineral and the sedimentary sequences reveal an alternation of perios to
steppe climate, and periods with hot and wet climate at the top of each sets of this
formation. The round quartz grains with traces of multiple shocks, packed by iron
oxides, testify the end to a hydrous cycle and installation to the desert conditions."
Diplôme : Doctorat en sciences En ligne : ../theses/sc-terre/CHE6587.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9699 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité CHE/6587 CHE/6587 Thèse Bibliothèque principale Thèses Disponible
Titre : Etude des glissements de terrain dans la région d'Oued Athmania : Cartographie et caracterisation(Algerie NE). Type de document : texte imprimé Auteurs : Loubna Cherouana, Auteur ; Ahcène Bourefis, Directeur de thèse ; Chaouki Benabbas, Directeur de thèse Mention d'édition : 30/05/2019 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2019 Importance : 180 f. Format : 30 cm. Note générale : Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Sciences de la terreTags : Sciences Géologiques: Géorisques et Géomatériaux oued Athmania susceptibilité aux glissements systéme d’information géographique(SIG) Analyse hiérarchique Multicritère(AHP) susceptibility in the slidings systéme of geographical information (SIG) Analytical Hierarchy Proccess (AHP) وادي العثمانیة قابلیة الانھیارات الأرضیة نظام المعلومات الجغرافیة تحلیل ھرمي متعدد المعاییر Index. décimale : 550 Sciences de la terre Résumé :
Northern Algeria presents a complex geology, structures and varied formations reflecting a geological history and palaeogeographic event. It is localized in a zone of convergence of plates and is characterized by a seismic activity important, result of an important internal geodynamics. The region of Oued Athmania, which is part of this active margin, has undergone a significant morpho-structural evolution during the Miocene and throughout the Quaternary. The relief has many deformations: some slopes have a chaotic and bloated appearance reflecting the fragility of the environment and its sensitivity to active morphogenesis manifested, inter alia, by different types of ground movements ranging from small stripping to large landslides, tipping crop fields and consequently reduced agricultural land, disruption of river dynamics
and deposition of a considerable amount of materials at the wadi beds. These disturbances, in their size and scope, are beginning to pose serious problems for development and road infrastructure. This work is a contribution to the knowledge of these gravitational movements, to the identification of the major factors that are responsible for them, in particular those related to the morpho structural context and the mapping of the areas susceptible to landslides in the oued Athmania region. The methodology adopted was based on the analysis of the geological environment: it was to draw geomorphological and hydrographic features and to understand the history and evolution of the study area. Field observations, the deciphering of aerial photos, the analysis of the hydrographic network, geological and topographic maps, the hypsometric map and the digital terrain model were all steps that allowed us to make an assumption about the process of slope instability, thus highlighting the causal part of the faciological parameters such as the granulometric composition and the mineralogical procession of the affected formations and their properties, in order to map the potentially vulnerable zones with the help of a geographic information system that provides assured leadership to a real decision support system. This cartography exploits the functionalities offered by GIS for the structuring of data, the crossing of information layers and the spatial analysis of different themes. It also includes the AHP multicriteria hierarchical analysis approach which allowed us to assemble a multitude of decision criteria into a single model, to make a comparative evaluation of each pair of criteria and to calculate their weights for the assessment. Compared each pair of options against each subcriterion. The combination of these working techniques allowed us to reveal new morphostructures in the region and to identify a wide variety of terrain instabilities; this diversity is related to the geological complexity, mainly the tectonics and the mineralogical procession of the geological formations which seem to play the role of a catalyst in the acceleration and the development of the instabilities in the region.
Note de contenu : Annexes. Diplôme : Doctorat En ligne : ../theses/sc-terre/CHE7608.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11444 Etude des glissements de terrain dans la région d'Oued Athmania : Cartographie et caracterisation(Algerie NE). [texte imprimé] / Loubna Cherouana, Auteur ; Ahcène Bourefis, Directeur de thèse ; Chaouki Benabbas, Directeur de thèse . - 30/05/2019 . - جامعة الإخوة منتوري قسنطينة, 2019 . - 180 f. ; 30 cm.
Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Sciences de la terreTags : Sciences Géologiques: Géorisques et Géomatériaux oued Athmania susceptibilité aux glissements systéme d’information géographique(SIG) Analyse hiérarchique Multicritère(AHP) susceptibility in the slidings systéme of geographical information (SIG) Analytical Hierarchy Proccess (AHP) وادي العثمانیة قابلیة الانھیارات الأرضیة نظام المعلومات الجغرافیة تحلیل ھرمي متعدد المعاییر Index. décimale : 550 Sciences de la terre Résumé :
Northern Algeria presents a complex geology, structures and varied formations reflecting a geological history and palaeogeographic event. It is localized in a zone of convergence of plates and is characterized by a seismic activity important, result of an important internal geodynamics. The region of Oued Athmania, which is part of this active margin, has undergone a significant morpho-structural evolution during the Miocene and throughout the Quaternary. The relief has many deformations: some slopes have a chaotic and bloated appearance reflecting the fragility of the environment and its sensitivity to active morphogenesis manifested, inter alia, by different types of ground movements ranging from small stripping to large landslides, tipping crop fields and consequently reduced agricultural land, disruption of river dynamics
and deposition of a considerable amount of materials at the wadi beds. These disturbances, in their size and scope, are beginning to pose serious problems for development and road infrastructure. This work is a contribution to the knowledge of these gravitational movements, to the identification of the major factors that are responsible for them, in particular those related to the morpho structural context and the mapping of the areas susceptible to landslides in the oued Athmania region. The methodology adopted was based on the analysis of the geological environment: it was to draw geomorphological and hydrographic features and to understand the history and evolution of the study area. Field observations, the deciphering of aerial photos, the analysis of the hydrographic network, geological and topographic maps, the hypsometric map and the digital terrain model were all steps that allowed us to make an assumption about the process of slope instability, thus highlighting the causal part of the faciological parameters such as the granulometric composition and the mineralogical procession of the affected formations and their properties, in order to map the potentially vulnerable zones with the help of a geographic information system that provides assured leadership to a real decision support system. This cartography exploits the functionalities offered by GIS for the structuring of data, the crossing of information layers and the spatial analysis of different themes. It also includes the AHP multicriteria hierarchical analysis approach which allowed us to assemble a multitude of decision criteria into a single model, to make a comparative evaluation of each pair of criteria and to calculate their weights for the assessment. Compared each pair of options against each subcriterion. The combination of these working techniques allowed us to reveal new morphostructures in the region and to identify a wide variety of terrain instabilities; this diversity is related to the geological complexity, mainly the tectonics and the mineralogical procession of the geological formations which seem to play the role of a catalyst in the acceleration and the development of the instabilities in the region.
Note de contenu : Annexes. Diplôme : Doctorat En ligne : ../theses/sc-terre/CHE7608.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11444 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité CHE/7608 CHE/7608 Thèse Bibliothèque principale Thèses Disponible
Titre : Étude néotectonique de la région de Zighout Youcef analyse morpho structurale et photo interprétation Type de document : texte imprimé Auteurs : Yacine Benzid, Auteur ; Chaouki Benabbas, Directeur de thèse ; Ahcène Bourefis, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 148 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Sciences de la terreTags : Néotectonique Morpho structural Instabilité des versants Zighout Youcef Neotectonic Slopes instability النشاط التكتوني الحدیث المورفوبنیویة عدم استقرار المنحدرات زیغود یوسف Index. décimale : 550 Sciences de la terre Résumé : Actually, many scientists agree with the idea that slopes evolution depends mostly on
lithological, topographic, climatic and anthropogenic factors. But, the results acquired from different neo tectonic studies in the Constantinois Tell (Raoult J.F., 1974, Marre A., 1987, Amireche H., 2001, Benabbas C., 2006) confirm that the relief deformation, mass movements and slops vulnerability depend also on the structural context. The active nature of north Algeria in general and the eastern Tell particularly increase the land movements related to relief deformations. These relief deformations are often connected to a morpho structural context marked by a neotectonic activity. The Zighout Youcef area is among the most deformed zones of the Constantinois Tell, where the geological structures associated with an active neotectonic and gravity movements are still poorly understood, which is necessary to know in details the structural context. With this study we would to clarify if the tectonic heritage is sufficient to trigger slops destabilization, and if the neotectonic is responsible for gravity hazard. In addition, these investigations will
improve our understanding about the evolution of slopes in the recent geological period (from Mio Pliocene to present) and about the triggering process of ground movements, sometimes with vast amplitudes. For a better understanding of this problem, we carried out a study of geological and morpho structural features, based on mapping tool. We presented a detailed analysis of the horizontal and vertical relief evolution, based on the elevation maps analyses at different scales and
completed with morpho geological cross sections. Besides, the relief analysis was coupled with aerial photography examinations. This remote sensing technique was established on a multi-source mapping, based on a correlation between the three information layers: aerial photography, geological maps and land topography, this
aid to locate the recent geological structures and determine their involvement in the relief deformations and slopes instability. In parallel, X-ray diffraction mineralogical analyzes were carried out on the most affected soils by mass movements in order to determine the presence and influence of clays minerals on movements acceleration. The association of these research techniques allowed us to improve our knowledge about the geomorphological organization and the post orogenic structuration of Zighout Youcef area. The recent and current tectonic activity consolidates and control the relief deformations. The geological structures and the mountain aspect of this area, accelerate and even amplify the slopes instability.
Diplôme : Doctorat En ligne : ../theses/sc-terre/BEN7386.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11036 Étude néotectonique de la région de Zighout Youcef analyse morpho structurale et photo interprétation [texte imprimé] / Yacine Benzid, Auteur ; Chaouki Benabbas, Directeur de thèse ; Ahcène Bourefis, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2017 . - 148 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Sciences de la terreTags : Néotectonique Morpho structural Instabilité des versants Zighout Youcef Neotectonic Slopes instability النشاط التكتوني الحدیث المورفوبنیویة عدم استقرار المنحدرات زیغود یوسف Index. décimale : 550 Sciences de la terre Résumé : Actually, many scientists agree with the idea that slopes evolution depends mostly on
lithological, topographic, climatic and anthropogenic factors. But, the results acquired from different neo tectonic studies in the Constantinois Tell (Raoult J.F., 1974, Marre A., 1987, Amireche H., 2001, Benabbas C., 2006) confirm that the relief deformation, mass movements and slops vulnerability depend also on the structural context. The active nature of north Algeria in general and the eastern Tell particularly increase the land movements related to relief deformations. These relief deformations are often connected to a morpho structural context marked by a neotectonic activity. The Zighout Youcef area is among the most deformed zones of the Constantinois Tell, where the geological structures associated with an active neotectonic and gravity movements are still poorly understood, which is necessary to know in details the structural context. With this study we would to clarify if the tectonic heritage is sufficient to trigger slops destabilization, and if the neotectonic is responsible for gravity hazard. In addition, these investigations will
improve our understanding about the evolution of slopes in the recent geological period (from Mio Pliocene to present) and about the triggering process of ground movements, sometimes with vast amplitudes. For a better understanding of this problem, we carried out a study of geological and morpho structural features, based on mapping tool. We presented a detailed analysis of the horizontal and vertical relief evolution, based on the elevation maps analyses at different scales and
completed with morpho geological cross sections. Besides, the relief analysis was coupled with aerial photography examinations. This remote sensing technique was established on a multi-source mapping, based on a correlation between the three information layers: aerial photography, geological maps and land topography, this
aid to locate the recent geological structures and determine their involvement in the relief deformations and slopes instability. In parallel, X-ray diffraction mineralogical analyzes were carried out on the most affected soils by mass movements in order to determine the presence and influence of clays minerals on movements acceleration. The association of these research techniques allowed us to improve our knowledge about the geomorphological organization and the post orogenic structuration of Zighout Youcef area. The recent and current tectonic activity consolidates and control the relief deformations. The geological structures and the mountain aspect of this area, accelerate and even amplify the slopes instability.
Diplôme : Doctorat En ligne : ../theses/sc-terre/BEN7386.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11036 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BEN/7386 BEN/7386 Thèse Bibliothèque principale Thèses Disponible
Titre : Etude pétrographique minéralogique des skarns du Djebel Filfila (Skikda , Algerie) Type de document : texte imprimé Auteurs : Ahcène Bourefis ; Univ. de Constantine, Éditeur scientifique ; Jean Verkaeren, Directeur de thèse Année de publication : 1994 Importance : 238 f. Note générale : 02 Disponibles au magasin de la B.U.C. Langues : Français (fre) Catégories : Français - Anglais
Sciences de la terreTags : Minéralogie Pétrographie Skarn Djebel filfila (Skikda) Skikda(Algérie) Index. décimale : 550 Sciences de la terre Permalink : index.php?lvl=notice_display&id=4338 Etude pétrographique minéralogique des skarns du Djebel Filfila (Skikda , Algerie) [texte imprimé] / Ahcène Bourefis ; Univ. de Constantine, Éditeur scientifique ; Jean Verkaeren, Directeur de thèse . - 1994 . - 238 f.
02 Disponibles au magasin de la B.U.C.
Langues : Français (fre)
Catégories : Français - Anglais
Sciences de la terreTags : Minéralogie Pétrographie Skarn Djebel filfila (Skikda) Skikda(Algérie) Index. décimale : 550 Sciences de la terre Permalink : index.php?lvl=notice_display&id=4338 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/2618 BOU/2618 Thèse Bibliothèque principale Thèses Disponible
Titre : Etudes mineralogique et geochimique des granitoides de la region de Collo Type de document : texte imprimé Auteurs : Mourad Lamri, Auteur ; Ahcène Bourefis, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 81 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Sciences de la terreTags : complexe magmatique granites granites péralumineux à cordiérite complex of the Kabylie of Collo pericuminous granites with cordierite الغرانيت الغرانيت الغني بالألومين و معدن الكورديوريت المعقد المغماتي Index. décimale : 550 Sciences de la terre Résumé : The region of Cap Bougaroun is part of the Kabylie of Collo. Structurally the massif of
Cape Bougaroun is integrated in the Maghrebian chain; it belongs to the internal domain and
more precisely to the base Kabyle.
The tertiary magmatic complex of the Kabylie of Collo is exposed in a metamorphic and
sedimentary complex that participates in the formation of this structural edifice.
The granites occupy a large surface of outcropping which cover almost the whole massif
of Cape Bougaroun, it is the ""pericuminous granites with cordierite"". These granites are of a
clear color, often porphyroids. The essential minerals are: quartz, potassium feldspar,
plagioclases, biotite, cordierite and muscovite. Tourmaline, zircon, apatite and ilmenite are
the accessory minerals.
Diplôme : Magistère En ligne : ../theses/sc-terre/LAM7100.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10501 Etudes mineralogique et geochimique des granitoides de la region de Collo [texte imprimé] / Mourad Lamri, Auteur ; Ahcène Bourefis, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2017 . - 81 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Sciences de la terreTags : complexe magmatique granites granites péralumineux à cordiérite complex of the Kabylie of Collo pericuminous granites with cordierite الغرانيت الغرانيت الغني بالألومين و معدن الكورديوريت المعقد المغماتي Index. décimale : 550 Sciences de la terre Résumé : The region of Cap Bougaroun is part of the Kabylie of Collo. Structurally the massif of
Cape Bougaroun is integrated in the Maghrebian chain; it belongs to the internal domain and
more precisely to the base Kabyle.
The tertiary magmatic complex of the Kabylie of Collo is exposed in a metamorphic and
sedimentary complex that participates in the formation of this structural edifice.
The granites occupy a large surface of outcropping which cover almost the whole massif
of Cape Bougaroun, it is the ""pericuminous granites with cordierite"". These granites are of a
clear color, often porphyroids. The essential minerals are: quartz, potassium feldspar,
plagioclases, biotite, cordierite and muscovite. Tourmaline, zircon, apatite and ilmenite are
the accessory minerals.
Diplôme : Magistère En ligne : ../theses/sc-terre/LAM7100.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10501 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité LAM/7100 LAM/7100 Thèse Bibliothèque principale Thèses Disponible
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