Dissertations / Theses on the topic 'Stratigraphie sismique'
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Le, Nir Isabelle. "Stratigraphie sismique tertiaire de la mer du Nord." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb376073226.
Full textPINHEIRO-MOREIRA, JOBEL LOURENCO. "Stratigraphie sismique et modelisation stratigraphique des depots de l'eocene du bassin de santos (marge bresilienne)." Rennes 1, 2000. http://www.theses.fr/2000REN10019.
Full textChami, Khazraji Soumia. "Etude de la zôneHaltenbanken par la méthode de stratigraphie sismique." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37596601h.
Full textChami, Khazraji Soumia. "Étude de la zone Haltenbanken par la méthode de stratigraphie sismique." Paris 6, 1986. http://www.theses.fr/1986PA066456.
Full textLe, T. V. "Stratigraphie sismique et modélisation stratigraphique : application à l'évolution tectonique oligo-miocène du Bassin du Fleuve Rouge (Vietnam)." Phd thesis, Université Rennes 1, 1998. http://tel.archives-ouvertes.fr/tel-00728242.
Full textLê, Tuâń Việt. "Stratigraphie sismique et modelisation stratigraphique : application a l'evolution tectonique oligo-miocene du bassin du fleuve rouge (vietnam)." Rennes 1, 1998. http://www.theses.fr/1998REN10066.
Full textOwono, Engueng Joseph. "Approche pluridisciplinaire de la stratigraphie sismique et séquentielle sur la marge ouest africaine entre l'Albien et le Maastrichien." Paris 6, 2007. http://www.theses.fr/2007PA066802.
Full textMahieux, Geoffroy. "Etude de l'enregistrement stratigraphique par sismique haute résolution." Lille 1, 2000. https://pepite-depot.univ-lille.fr/RESTREINT/Th_Num/2000/50376-2000-64.pdf.
Full textGillet, Hervé Rehault Jean-Pierre. "La stratigraphie tertiaire et la surface d'érosion messinienne sur les marges occidentales de la mer Noire stratigraphie sismique haute résolution /." [S.l.] : [s.n.], 2004. http://tel.ccsd.cnrs.fr/docs/00/04/77/79/PDF/tel-00008594.pdf.
Full textGILLET, Hervé. "La stratigraphie tertiaire et la surface d'érosion messinienne sur les marges occidentales de la mer Noire: stratigraphie sismique haute résolution." Phd thesis, Université de Bretagne occidentale - Brest, 2004. http://tel.archives-ouvertes.fr/tel-00008594.
Full textGillet, Hervé. "La stratigraphie tertiaire et la surface d'érosion messinienne sur les marges occidentales de la mer Noire : stratigraphie sismique haute résolution." Brest, 2004. https://tel.archives-ouvertes.fr/tel-00008594.
Full textThe Tertiary paleogeographic evolution of the Black Sea, within the paratethys realm, was characterised by several periodic isolation episodes. The eutatic responses of the Black Sea to these de-connexions, and particularly those related to the Mediterranean Messinian crisis, are still not clearly established. The high resolution seismic stratigraphy study we present is based on interpretation of multichanel HR seismic data correlated with drillings recovered on the occidental Black Sea margin. Our investigations were concentrated on the identification of erosional surfaces, interpreted as markers of eustatic falls, linked to the basin isolation phases. On the Romano-Ukrainian shelf, the seismic profiles display six major discontinuities regarded as Tertiary erosional surfaces : (1) the surfaces underlined at the base of the Eocene (E), at the base of the Oligocene (O), in the Middle Miocene (M) and at the base of the Pontian (P); (2) and two intra-Pontian erosional unconformities (L. IPU and IPU). On the other hand, the Messinian erosional surface was clearly identified on the Bulgaro-Turckish margin. Recent correlation between the Paratethysian and Mediterranean stratigraphic scale suggest that the IPU surface recognised on the Romano-Ukrainian shelf is equivalent to the Messinian erosional surface. Among the five ante-Messinian erosional surfaces described, we interpret the M surface as the signature of a catastrophic sea level fall related to the Upper Burdigalian isolation phase. We propose that the four other surfaces correspond either to submarine erosion episodes, or to transgressive events. The discovery of the Messinian erosional surface in Black Sea constituting the major result of this study, enables to validate the assomption about the Messinian Dessiccation of the Black Sea [Hsü and Giovanoli, 1979]
MENIER, David. "Morphologie et remplissage des vallées fossiles sud-armoricaines : Apport de la stratigraphie sismique." Phd thesis, Université Rennes 1, 2003. http://tel.archives-ouvertes.fr/tel-00007291.
Full textMenier, David. "Morphologie et remplissage des vallées fossiles sud-armoricaines : apports de la stratigraphie sismique." Lorient, 2003. http://www.theses.fr/2003LORIS025.
Full textMenier, David. "Morphologie et remplissage des vallées fossiles sud-armoricaines : apport de la stratigraphie sismique /." Rennes : Géosciences-Rennes, 2004. http://catalogue.bnf.fr/ark:/12148/cb39955706d.
Full textDylikowski, Jan. "Étude en stratigraphie sismique de remplissage tertiaire de la région de Pechelbronn (Fossé Rhénan) : application au développement pétrolier en domaine de fossé d'effondrement." Paris 11, 1985. http://www.theses.fr/1985PA112330.
Full textPrincipal stages of evolution of the Pechelbronn zone in the Rhine graben are defined on the basis of seismic stratigraphy and log correlation methods applied to a series of profiles executed by TOTAL-CFP in 1981. Particularly, thanks to the first detailed subdivision into seismic sequences of Tertiary sedimentary fill of this part of the graben it is inferred: - possibility of submeridian compression (N 20°) due to the Pyrenean tectonic phase movements, - causal link of Eocene compression phase with later Oligocene down faulting. - moreover new lothologic subdivision of the dolomite zone (discordance suranut) as well as an attempt of timing of the first Tertiary marine transgression during the Lattofien time are proposed. - Detailed analysis of seismic facies and the correlation of well logs with seismic profile make it possible to identify positively the seismic markers with the wire-logging and lithologic key beds. The sedimentary and tectonic events are interpreted thanks to a transformation of seismic sections into depth profiles, therefore may be directly applied to the analysis of oil generation and trapping. Complete succession of tectonic phases in the Pechelbronn sector is evidenced thanks to thorough analysis of faults from the seismic record. New aspects of oil trapping in the Mesozoic rocks stem from the study of multi-phase synsedimentary faulting on this part of the Rhine graben
Chennouf, Touria. "La Terminaison sud de la ride de la Barbade : marge active des petites Antilles : étude des relations tectonique-sédimentation par application de la stratigraphie sismique /." Paris : Technip, 1987. http://catalogue.bnf.fr/ark:/12148/cb349781213.
Full textMoreira, Da Costa Maia Renata. "Evolução estratigráfica cenozoica da porção norte da bacia de santos : quantificação do fluxo sedimentar e da subsidência através de análise sísmica e de modelagem estratigráfica." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066208/document.
Full textThe main objective of this study is to better understand and to quantify experimentally the main parameters that control the geomorphological and stratigraphic evolution of the Cenozoic sedimentary succession of the northeast Santos basin, Brazil, in the last 49.5 my. For this purpose, a variety of combining methologies were used, such as: seismic analysis of a dataset composed of different resolution levels (~7-8 s and ~400 ms penetration), chronostratigraphic and lithological data from 19 exploratory wells and stratigraphic modeling. Seismic analysis and stratigraphic modelling led to the identification of 9 main stratigraphic sequences that could be grouped into 3 megasequences (Megasequences A, B and C): (i) Megasequence A is characterized by deltaic features developed into a ramp feature located between Guanabara Bay and Cabo Frio. The formation of this delta resulted in a sedimentary overcharge that induced the basinward salt migration. The sedimentary input that feeds this delta was interpreted as related to an ancient Paraíba do Sul River that diversion to the Campos basin at the end of the megasequence development, resulting in a dramatically reduce the sedimentary influxes into Santos basin; (ii) Megasequence B is characterized by the retrogradational trend of sedimentary systems that offset offlap break of surfaces developed at 30 and 21 Ma about 78 km landward. This megasequence is also characterized by the beginning of conturites deposition related to the changes of oceanic circulation due to the opening of Drake and Tasmanian passages; (iii) Megasequence C is characterized by progradational systems that resulted in the coastline shift about 70 km oceanwards, in the last 11.5 my. The dominant progradational trend of this sequence is interpreted as a response of the increase in the sedimentary influx rate intensified by the spectral characteristics and amplitude of the glacial-induced eustatic signal that characterizes the Quaternary period
LAFONT-PETASSOU, SANDRINE. "Geometrie des sequences de depot a la limite continent-ocean : exemple de la marge pakistanaise - stratigraphie sismique." Paris 11, 1993. http://www.theses.fr/1993PA112204.
Full textLê, Tuâń Việt. "Stratigraphie sismique et modélisation statigraphique : application à l'évolution tectonique oligo-miocène du bassin du Fleuve Rouge (Vietnam) /." Rennes : Géosciences, Université de Rennes I, 1999. http://catalogue.bnf.fr/ark:/12148/cb37073680n.
Full textSchulbaum, Laurent. "Traduction des surfaces stratigraphiques et des géométries deltaïques lors du passage de l'échelle puits à l'échelle sismique." Nancy 1, 1996. http://www.theses.fr/1996NAN10328.
Full textMoreira, Da Costa Maia Renata. "Evolução estratigráfica cenozoica da porção norte da bacia de santos : quantificação do fluxo sedimentar e da subsidência através de análise sísmica e de modelagem estratigráfica." Electronic Thesis or Diss., Paris 6, 2014. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2014PA066208.pdf.
Full textThe main objective of this study is to better understand and to quantify experimentally the main parameters that control the geomorphological and stratigraphic evolution of the Cenozoic sedimentary succession of the northeast Santos basin, Brazil, in the last 49.5 my. For this purpose, a variety of combining methologies were used, such as: seismic analysis of a dataset composed of different resolution levels (~7-8 s and ~400 ms penetration), chronostratigraphic and lithological data from 19 exploratory wells and stratigraphic modeling. Seismic analysis and stratigraphic modelling led to the identification of 9 main stratigraphic sequences that could be grouped into 3 megasequences (Megasequences A, B and C): (i) Megasequence A is characterized by deltaic features developed into a ramp feature located between Guanabara Bay and Cabo Frio. The formation of this delta resulted in a sedimentary overcharge that induced the basinward salt migration. The sedimentary input that feeds this delta was interpreted as related to an ancient Paraíba do Sul River that diversion to the Campos basin at the end of the megasequence development, resulting in a dramatically reduce the sedimentary influxes into Santos basin; (ii) Megasequence B is characterized by the retrogradational trend of sedimentary systems that offset offlap break of surfaces developed at 30 and 21 Ma about 78 km landward. This megasequence is also characterized by the beginning of conturites deposition related to the changes of oceanic circulation due to the opening of Drake and Tasmanian passages; (iii) Megasequence C is characterized by progradational systems that resulted in the coastline shift about 70 km oceanwards, in the last 11.5 my. The dominant progradational trend of this sequence is interpreted as a response of the increase in the sedimentary influx rate intensified by the spectral characteristics and amplitude of the glacial-induced eustatic signal that characterizes the Quaternary period
De, Min Lyvane. "Sismo-stratigraphie multi-échelles d'un bassin d'avant-arc : Le bassin de Marie-Galante, Petites Antilles." Thesis, Antilles-Guyane, 2014. http://www.theses.fr/2014AGUY0799/document.
Full textThe Lesser Antilles result of the slow westward subduction of the North and South American plate under the Caribbean plate (2 cm / year). At the latitude of the Guadeloupe archipelago and ~ 150 km to the west of the deformation front, the fore-arc basin of Marie-Galante forms a perched basin tilted to the pit and limited to the East by a shoal, the Spur Karukéra. At this latitude, Marie-Galante basin dominates the accretionary prism of Barbados and faces wrinkle Tiburon sweeping the area from North to South from the late Miocene. The sedimentary fill Basin Marie-Galante shows active deformation since at least ~ 30 million years. The aim of the work is to reconstruct the tectono-sedimentary evolution of the basin to provide new constraints on the overall understanding of the frontal subduction zone Lesser Antilles. This work relies on multibeam bathymetry data and high-resolution seismic reflection multi-traces acquired during campaigns KaShallow program. This database, supplemented by lower resolution of previous campaigns seismic profiles, provides a pseudo-3D coverage and four scales of resolution of the entire basin. ROV sampling and targeted core provided 40 samples in the main seismic units. Petrological analysis and biostratigraphic dating allow paleoenvironmental reconstructions from the upper Paleogene up Actuel. Seismic interpretation multiscale shows a sedimentary basin reaching ~ 4,5s double (~ 4500-5625 m) on a substrate pre-structured magma. This basin consists of 5 main sedimentary units (E-1, E1, E2, E3 and E4) divided into 13 units bounded by discontinuities 14 surfaces. The sequential organization of seismic units allows to highlight sequences 10 deposits of third order (S-1 to S9). The biostratigraphic calibration of all sequences able to offer a tectono-sedimentary evolution of the Eocene basin to Present. Thus, we distinguish four normal fault systems associated with three phases of extensions that control the architectural and sedimentary evolution of the basin. 1 / A system N050 ± 10 ° E inherited assets from the upper Paleogene, which controls the overall pelvic tilt towards the SSE. He is responsible for the formation of the escarpment Désirade about 4500 m elevation. The first extension is interpreted as resulting from the fragmentation of the fore-arc in response to the increase in the radius of curvature of subduction. 2 / A system N130 ° -N150 ° E, structuring across the Spur Karukéra, which controls sediment from the Miocene and marks the first phase of transverse extension arc. 3 / A system N160 ° E ° -N180 which segments Basin Marie-Galante in a sub-basin to the west and the Spur Karukéra in the East. This second extension, generally perpendicular to the margin, is accompanied by subsidence and reversing the polarity of the basin in response to his switch to the pit, beginning during the Middle Miocene and is ongoing in the East the basin. This long-term evolution of the forearc, concurrent with the decline in volcanic arc to the west, is considered as resulting from a basal erosion of the top plate. 4 / A system N090 ± 10 ° later E is located in the center of the basin and controlling the development of neritic carbonate platforms on certain blocks heads, such as Marie-Galante. This latest extension, parallel to the arc occurs in the basin from the lower Pliocene. It is superimposed on the expansion plan perpendicular to the fore-arc and is interpreted as the accommodation of the partitioning of deformation in response to the increasing obliquity front subduction north
Belmecheri, Abdelaziz. "Contribution à l'étude géologique et structurale de la région de l'Ahnet-Timimoun par sismique réflexion et apport des pseudo-diagraphies d'impédance acoustique à l'interprétation stratigraphique : principe et application (Sahara occidental algérien)." Bordeaux 1, 1985. http://www.theses.fr/1985BOR10549.
Full textRigollet, Christophe. "Valorisation sédimentologique de l'information sismique : application au comblement des bassins profonds de la Marge Atlantique Nord Européenne du Crétacé à l'Actuel." Paris, ENMP, 2001. http://www.theses.fr/2001ENMP1278.
Full textThe NE Atlantic margin reservoir sands result from high density turbiditic flow (massive sands pro parte). Their transport and deposition are controlled by the basin floor topography. Consequently, whatever the observation scale, the open and confined sands are characterised by onlap on the basin floor and by lenticular shape with convex up base. The restitution of the paleotopography, sedimentary source, transit surface and deposit areas, give some relevant tools to predict the sands. This approach reviews the "sandy debris flow" model, defined in the same area, which is today the subject of a large debate. The bottom currents are a sorting factor, either intercepting the finest grain of a turbulent flow, or reworking the grains, after their deposition. The post-depositional architectural element identification, gives some tools to predict the reservoir location, the cover rock permeability and to avoid confusion caused by the similarity with sedimentary elements
Labaune, Caroline. "Architecture, genèse et évolution du littoral du Languedoc-Roussillon : impact des facteurs physiques au cours du Quaternaire terminal." Perpignan, 2005. http://www.theses.fr/2005PERP0650.
Full textLate-quaternary deposits analysis of the inner shelf and littoral area of the gulf of lion is performed. Dataset consists of high resolution seismic, completed in littoral area with new very high resolution data. Lithological and chronological calibration is based on cores and wells. Stratigraphic pattern differs from an eastern sector front of the rhône deltaic plain and a southern sector front of the languedoc-roussillon plains. The eastern area comprises retrograding parasequences of the transgressive systems tract including two paleo-beach barriers dated from younger dryas and early holocene (8,2 ky cal bp). The highstand prograding deposits constitutes the rhône deltaic plain and prodetaic lobes. In the southern area, the thin trangressive systems tract comprises aggrading parasequences overlaid by the highstand deposits (modern littoral wedge and backbarrier lagoonal deposits). Lateral variation of the stratigraphic organisation results from the interaction beween glacio-eustatism and local factors such as the variations of sediment supply (rhodanian area) or the paleo-topography induced by the pliocene substratum or an incised valleys system made of 4th order imbricated depositional sequences in the southern area
Papadimitriou, Nikolaos. "Geodynamics and synchronous filling of a rift type-basin evolved through compression tectonics (The western margin of the Levant Basin)." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066540/document.
Full textThe Eastern Mediterranean owes its complex nature to the movement of Africa, Arabia and Eurasia. The recent gas discoveries in the Levant Basin (2009) provoked the necessity of necessity of conducting a combined (seismic and field) study to better understand the geological evolution of the Basin. The combination of geophysical and field data allows the conceptualization of onshore and, offshore 3D models in order to characterize the tectonostratigraphic evolution of this area and eventually trace the main sources and pathways that contributed to the infilling of the Levant Basin. The evolution of the Levant Basin is marked by the transition from a pure carbonate system to a mix system (carbonate /siliciclastic) during the Cenozoic. The Eratosthenes block corresponds to a fault block platform. Four major seismic sequences, characterized by periods of aggradation, retrogradation and progradation, punctuated by major unconformities and drowning surfaces have been recognized on the Eratosthenes Seamount. These periods are: the Late Jurassic; the Early Cretaceous, the Late Cretaceous and the Miocene. The initiation of the collision during the Miocene between the African and Eurasian plates coincides with the uplift of the Eratosthenes Seamount with a peak during the upper Miocene (pre-Messinian Salinity Crisis) followed by its northward tilting under Cyprus thrusting. We show that the collision of the two plates caused the formation of small basins in southern part of Cyprus; a piggyback basin (Polis), and a flexural basin (Limassol) that were controlled by the different substratum of the Mesozoic sediments
Porres, Luna Alma América, and Vacio Fernando Castrejon. "Caractérisation détaillée du champ Abkatún-Kanaab (Golfe du Mexique) au moyen des diagraphies différées et de la sismique." Bordeaux 1, 1991. http://www.theses.fr/1991BOR10577.
Full textLeroux, Estelle. "Quantification des flux sédimentaires et de la subsidence du bassin Provençal." Phd thesis, Université de Bretagne occidentale - Brest, 2012. http://tel.archives-ouvertes.fr/tel-00790852.
Full textSerrano, Olivier. "Le Crétacé Supérieur - Paléogène du Bassin Compressif Nord-Pyrénéen (Bassin de l'Adour). Sédimentologie, Stratigraphie, Géodynamique." Phd thesis, Université Rennes 1, 2001. http://tel.archives-ouvertes.fr/tel-00675829.
Full textBaby, Guillaume. "Mouvements verticaux des marges passives d’Afrique australe depuis 130 Ma, étude couplée : stratigraphie de bassin : analyse des formes du relief." Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1S009/document.
Full textThe South African (Kalahari) Plateau is the world's largest non-orogenic plateau. It forms a large-scale topographic anomaly (×1000 km) which rises from sea level to > 1000 m. Most mechanisms proposed to explain its elevation gain imply mantle processes. The age of the uplift and the different steps of relief growth are still debated. On one hand, a Late Cretaceous uplift is supported both by thermochronological studies and sedimentary flux quantifications. On the other hand, geomorphological studies suggest a Late Cenozoic uplift scenario (<30 Ma). However few attentions were paid to the evolution of the overall geomorphic system, from the upstream erosional system to the downstream depositional system. This study is based on two different approaches : onshore, on the mapping and chronology of all the macroforms (weathering surfaces and associated alterites, pediments and pediplains, incised rivers, wave-cut platforms) dated by intersection with the few preserved sediments and the volcanics (mainly kimberlites pipes) ; offshore, on a more classical dataset of seismic lines and petroleum wells, coupled with biostratigraphic revaluations (characterization and dating of vertical movements of the margins - sediment volume measurement). The main result of this study is that the South African Plateau is an old Upper Cretaceous relief (90-70 Ma) reactivated during Oligocene (30-15 Ma) times. Its evolution can be summarized as follows : 100-70 Ma (Cenomanian to Campanian): low elevation plateau (0-500 m) with older and higher reliefs located along the Indian side, acting as a main divide between the Atlantic and the Indian Oceans. First uplift occurred in the east at ~92 Ma, with a fast flexuration of the Indian margins. This initiates a paroxysm of the erosion (90-80 Ma) with the growth of a large delta along the Atlantic margin (Orange delta). Deformation migrated progressively westward and resulted on the growth of the Atlantic marginal bulge between 81 and 70 Ma. Most of the present-day relief was probably created at this time. This is supported by the decrease of the sedimentary flux which suggests a reorganisation of the interior drainage pattern ; 70-30 Ma (Uppermost Cretaceous-Paleogene): most of the relief is fossilized and weathered - relative tectonic quiescence ; 0-15 Ma (Oligocene-Early Miocene): second period of the South African Plateau uplift. Most of the deformation took place along the Indian side of the Plateau (strike flexure) feeding the Zambezi, Limpopo and Tugela deltas ; since at least Middle Miocene times, all those reliefs have been fossilized, with very low erosion rates (x1m/Ma), in response to the major aridification of southern Africa
Rouillard, Pierrick. "Modèle architectural et lithologique du système de Rosetta (Delta du Nil, Méditerranée orientale) : implication pour un analogue actuel de réservoir pétrolier." Nice, 2010. http://www.theses.fr/2010NICE4113.
Full textLes systèmes sédimentaires turbiditiques modernes présentent un intérêt aussi bien académique qu’industriel pour la compréhension de la construction des marges continentales, ainsi que pour l’élaboration d’analogues de réservoirs pétroliers. Depuis de nombreuses années, les systèmes sédimentaires situés au large des grands deltas, sont des cibles préférentielles des compagnies pétrolières, car les systèmes deltaïques et turbiditiques sont édifiés par/selon des processus hydrodynamiques reconnus pour leur capacité à trier et à concentrer les sables. Le besoin d’analogues est crucial pour l’exploration pétrolière, principalement pour les réservoirs marins profonds. Leur grande variabilité de taille, d’épaisseur et leur changement latéral de faciès rendent ces systèmes très difficiles à prédire et modéliser aussi bien de façon analogique que numérique. L’analyse de la géométrie et du mode d’empilement des corps sédimentaires « récents » peut ainsi améliorer notre capacité à comprendre les réservoirs enfouis à plusieurs milliers de mètres sous le fond marin. Le système de Rosetta (Province Occidentale du Delta du Nil) est probablement un des meilleurs sites pour l’étude d’un appareil gravitaire moderne silto-argileux alimenté par un delta, car d’une part son histoire récente, son architecture générale, sa source et les facteurs contrôlant la dispersion sédimentaire sont aujourd’hui bien contraints, et d’autre part le Delta du Nil correspond à la principale zone d’exploration gazière en Méditerranée. L’objectif de ce travail est donc de présenter un modèle architectural et lithologique du système de Rosetta à l’échelle du Quaternaire, en intégrant l’ensemble des environnements de la marge (plateau continental, pente et bassin profond). Une telle corrélation plateau-bassin n’a encore jamais pu être effectuée complètement dans aucun des grands systèmes turbiditiques modernes et constitue donc le point fort de ce travail. Une large couverture de données sismiques 2D et 3D sur l’ensemble du système de Rosetta (au Nord ouest du delta du Nil), associée à un cadre stratigraphique relativement bien contraint, a permis de caractériser les objets sédimentaires et de reconstituer l’architecture générale du système depuis le Pliocène supérieur. Parmi ces objets, 11 canyons et 18 dépôts de transport en masse ont notamment été cartographiés sur la plate-forme et la pente continentale. La chronologie des évènements de dépôt, qui a pu être particulièrement détaillée pour les derniers 200 ka, et les séquences de dépôts associées ont servi de base pour la conception du modèle. Le système de Rosetta apparaît comme un système à source ponctuelle instable (ou migrante), principalement contrôlé par les variations relatives du niveau marin, les variations de flux sédimentaires et les déstabilisations de bordure de plate-forme. Le caractère cyclique des séquences de dépôt mis en évidence en profondeur suggère que l’organisation stratigraphique peut être appliquée aux dépôts plus anciens tels que les Formations El Wastani et Kafr El Sheikh, connues comme d’importants réservoirs de gaz dans la région du Delta du Nil. Plus généralement, la comparaison du système de Rosetta (ou Nil récent) avec des systèmes analogues comme le Mississippi ou l’Amazone a montré que le fonctionnement du système général du Delta du Nil n’est pas unique à l’échelle du globe et que le modèle obtenu représente un bon analogue moderne pour les systèmes sédimentaires de subsurface déposés en domaine marin profond
Dujoncquoy, Emmanuel. "Architecture stratigraphique et caractérisation, réservoir des systèmes carbonates progradants, crétacé inférieur du Sultanat d'Oman : étude intégrée en subsurface et à l'affleurement du système progradant Lekhwair/Habshan/Salil." Bordeaux 3, 2011. https://extranet.u-bordeaux-montaigne.fr/memoires/diffusion.php?nnt=2011BOR30074.
Full textThe Lekhwair/Habshan/Salil (or LHS) system is a carbonate succession that prograded across the eastern part of the Arabian plate from Berriasian to early Bareremian. The three ormations that compose this system respectively correspond to the inner platform (Lekhwair Fm. ) platform margin (Habshan Fm. ) and slope to basin facies associations (Salil Fm. ). In Interior Oman, this system shows a conspicuous prograding character with well-expressed clinoforms (Berriasian to Valanginian). The formations imaged on seismic crop out toward the North in the Oman Mountains (upper Valanginian to lower Barremian). This aim of this study is to precise the stratigraphic and geometric organisation of the LHS system at the scale of the sedimentary basin and the depositional sequences, but also to improve the understanding and the prediction of the carbonate reservoir into these prograding systems. The study went through a combination of an interpretation of prograding geometries by seismic stratigraphy and a sedimentologic and stratigraphic outcrop analysis in the Jebel Akhdar (Oman Mountains). This analysis of this system from the Berriasian to the early Barremian allows the interpretation of the relative sea level variations of the Cretaceous and the tectonic episodes that affected the arab plate in this time
Papadimitriou, Nikolaos. "Geodynamics and synchronous filling of a rift type-basin evolved through compression tectonics (The western margin of the Levant Basin)." Electronic Thesis or Diss., Paris 6, 2017. http://www.theses.fr/2017PA066540.
Full textThe Eastern Mediterranean owes its complex nature to the movement of Africa, Arabia and Eurasia. The recent gas discoveries in the Levant Basin (2009) provoked the necessity of necessity of conducting a combined (seismic and field) study to better understand the geological evolution of the Basin. The combination of geophysical and field data allows the conceptualization of onshore and, offshore 3D models in order to characterize the tectonostratigraphic evolution of this area and eventually trace the main sources and pathways that contributed to the infilling of the Levant Basin. The evolution of the Levant Basin is marked by the transition from a pure carbonate system to a mix system (carbonate /siliciclastic) during the Cenozoic. The Eratosthenes block corresponds to a fault block platform. Four major seismic sequences, characterized by periods of aggradation, retrogradation and progradation, punctuated by major unconformities and drowning surfaces have been recognized on the Eratosthenes Seamount. These periods are: the Late Jurassic; the Early Cretaceous, the Late Cretaceous and the Miocene. The initiation of the collision during the Miocene between the African and Eurasian plates coincides with the uplift of the Eratosthenes Seamount with a peak during the upper Miocene (pre-Messinian Salinity Crisis) followed by its northward tilting under Cyprus thrusting. We show that the collision of the two plates caused the formation of small basins in southern part of Cyprus; a piggyback basin (Polis), and a flexural basin (Limassol) that were controlled by the different substratum of the Mesozoic sediments
Grélaud, Carine. "Enregistrement stratigraphique des phases d'émersion sur les plates-formes carbonatées : une étude intégrée à l'effleurement et en sismique de la plate-forme cénomanienne d'Oman (Formation Natih)." Bordeaux 3, 2005. https://tel.archives-ouvertes.fr/tel-00544620.
Full textVagner, Pierre. "Séquences de dépôts du Quaternaire supérieur et variations climatiques en mer de Chine de l'Est." Lille 1, 2001. https://pepite-depot.univ-lille.fr/RESTREINT/Th_Num/2001/50376-2001-109.pdf.
Full textHawie, Nicolas. "Architecture, geodynamic evolution and sedimentary filling of the levant basin : a 3D quantitative approach based on seismic data." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2014. http://tel.archives-ouvertes.fr/tel-00990235.
Full textGrélaud, Carine. "ENREGISTREMENT STRATIGRAPHIQUE DES PHASES D'EMERSION SUR LES PLATES-FORMES CARBONATEES Une étude intégrée à l'affleurement et en sismique de la plate-forme cénomanienne d'Oman (Formation Natih)." Phd thesis, Université Michel de Montaigne - Bordeaux III, 2005. http://tel.archives-ouvertes.fr/tel-00544620.
Full textGrasseau, Nicolas. "Architecture, dynamique et modélisation sismique synthétique d'un système fluvio-deltaïque syntectonique : le complexe deltaïque éocène moyen du Sobrarbe, bassin d'avant-pays sud-pyrénéen (Aragon, Espagne)." Thesis, Bordeaux 3, 2016. http://www.theses.fr/2016BOR30029.
Full textIn the South-Pyrenean foreland basin, the exceptional continuity of middle Eocene Sobrarbe deltaic complex deposit environments allows to observe the stratigraphic and sedimentary architecture of a syntectonic river-dominated delta system at different scales. The main objective of this study is to determine the origin of allogenic and/or autogenic factors that control the distribution of deposits of such sedimentary system in a compressive setting, in order to compare it to other deltaic systems that accumulate in different geological contexts. This study is based on the acquisition of detailed geological mapping and about sixty measured sections. The database is complemented by updating chronostratigraphic data from the literature and additional magnetostratigraphic data. Sedimentological and stratigraphic analysis of the sedimentary system leads to an accurate description of geometry, facies and physical processes of different depositional environments distributed along two sedimentary models: a high energy river-delta system developed during progradational phases, a low energy mixed siliciclastic-carbonate system characterizing the aggrado-progradational and transgressive phases. Three dip sections analysis allows the identification of three nested order sequence: fifth-order sequences, fourth-order sequences and third-order sequences. The complex organization of fourth and third-order sequences systems tracts reflects accommodation variations caused mainly by structural deformation at different scales, secondary by eustatic changes. An advanced systems tract analysis leads a discussion of interrelationships between three main parameters that control the dynamics in time and space of sedimentary system: changes in the accommodation rate, sediment input and the influence of sedimentary processes. These elements provide semi-quantitative information regarding to the sediment accumulation within the different depositional environments (source to sink). Summary of results leads to the sequential reconstruction of the Sobrarbe deltaic complex paleogeography. Subsidence analysis of the Ainsa basin permits to reconstruct the sedimentation and sedimentary basin evolution from Lutetian to Oligocene times. An integrated study of outcrop-forward seismic modelling-real seismic analog provides an architectural and dimensional data combination used to improve seismic interpretation of river-deltaic reservoir systems. Such studies greatly reduce the uncertainties associated with the resolution of subsurface data, enabling better economic assessment of reservoirs
En la cuenca de antepais surpirenaica, la continuidad extraordinaria de los ambientes de deposito del complejo deltaico eoceno medio del Sobrarbe permite la observacion de la arquitectura estratigrafica y sedimentaria de un sistema fluvio-deltaico sintectonico a diferentes escalas. El objetivo principal del estudio presentado es la determinacion del origen de los factores alogenicos y/o autogenicos que controlan la distribucion de los depositos de dicho sistema sedimentario en contexto compresivo, para poder compararlo con otros sistemas deltaicos acumulados en contextos geologicos diferentes. Este estudio se basa en la adquisicion de una cartografia geologica detallada y de una sesentena de columnas sedimentarias. La base de datos se completa mediante la actualizacion de los datos cronoestratigraficos originarios de la literatura y la adquisicion puntual de datos magnetoestratigraficos. El analisis sedimentologico y estratigrafico del sistema sedimentario ha dado lugar a una descripcion exacta de las geometrias, las facies, y de los procesos fisicos que caracterizan los diferentes ambientes de depositos dentro de dos modelos sedimentarios: un sistema fluvio-deltaico de alta energia desarrollado durante fases progradantes, un sistema mixto detritico-carbonatado caracterizando fases agrado-progradantes y transgresivas. El analisis de tres paneles de correlacion, de orientacion proximal-distal, ha permitido la distincion de tres ordenes de secuencialidad: secuencias de quinto orden, de cuarto orden y de tercer orden. La organizacion compleja de diferentes cortejos de deposito de secuencias de cuarto y tercer orden refleja variaciones de acomodacion provocadas principalmente por la deformacion estructural a diferentes escalas y por variaciones eustaticas. Un analisis detallado de los cortejos sedimentarios permite una discusion sobre interrelaciones entre los tres parametros mayores que controlan la dinamica del sistema sedimentario en el espacio y en el tiempo: las variaciones de la tasa de acomodacion, del flujo sedimentario y la influencia de procesos sedimentarios. Dichos elementos proporcionan informacion semicuantitativa sobre la acumulacion sedimentaria en los ambientes de deposito (source to sink). La sintesis de los resultados llega a la reconstruccion de la paleogeografia del complejo deltaico del Sobrarbe. Finalmente, el analisis de la subsidencia de la cuenca de Ainsa ha permitido de reconstruir la evolucion de la sedimentacion y de la cuenca sedimentaria entre el Luteciense y el Oligoceno. Un estudio integrado afloramiento-modelizacion sismica sintetica-analogo real de subsuelo proporciona una combinacion de datos arquitecturales y dimensionales util para mejorar interpretaciones sismicas de sistemas reservorios fluvio-deltaicos. Dichos estudios reducen de manera considerable incertidumbres asociadas a la resolucion de los datos de subsuelo, lo que permite una mejor evaluacion economica de los reservorios
Lanteaume, Cyprien. "Couplage de la modélisation stratigraphique et diagénétique : développements numériques et applications aux systèmes carbonatés." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0344.
Full textCarbonate sedimentary systems record both global and local geological changes of the outer envelope of the Earth and contain more than 75% of conventional hydrocarbon reserves. These carbonate systems show a great complexity at every spatial and temporal scales. To increase our ability to understand and predict such intricate natural systems, it is necessary to integrate naturalistic and quantitative methodological apporaches. Numerical process-based modeling (stratigraphic-sedimentary-diagenetic) reduces the uncertainty of prediction of carbonate reservoir properties. The manuscript presents a method of iterative modeling of carbonate systems from stratigraphy to seismic by integrating diagenesis. This approach is based on the coupling of numerical tools and a working approach combining sedimentology, diagenesis, rock physics and seismic simulation. Tests on case studies associated with scientific and industrial issues validated the method.The modeling approach that was developed during the thesis allows to integrate a large number of multi-scale and multidisciplinary data. Models can easily be shared between the disciplines of geosciences. The model continuum along different scales of space (from the basin to the reservoir) and time eases the integration of various data. The obtained synthetic seismic is not a simple geometric convolution, but an integration of sedimentological and diagenetic properties, which allows for an analysis of the stratigraphic significance of the seismic reflectors. This innovative approach integrates naturalistic and quantitative methods, which improve the understanding and prediction of carbonate systems and reservoirs
Lenoir, Fabien. "Faciès, géométries et déformations du Jurassique du Sud- Ouest du bassin de Paris : un domaine faiblement subsident, transition avec le bassin d'Aquitaine." Phd thesis, Université Rennes 1, 2012. http://tel.archives-ouvertes.fr/tel-00881510.
Full textMasquelet, Charles. "Magmatisme, héritage et déformation autour de l’archipel des Comores, dans le bassin de Somalie. Implications géodynamiques." Electronic Thesis or Diss., Sorbonne université, 2023. http://www.theses.fr/2023SORUS613.
Full textThe Comoros archipelago, located between Madagascar and Mozambique, experiences significant regional seismic activity. The volcanic island of Mayotte, underwent a major seismic-volcanic crisis in 2018, related to the formation of a new submarine volcanic structure, Fani Maoré, 50 km off its coast. Various hypotheses have been proposed to explain both the origin of the archipelago and its recent evolution. However, both the age of the formation of the archipelago's islands and the nature of the crust in the Comoros basin are poorly constrained, largely due to a lack of data. The objective of this thesis is to place recent seismic-volcanic activity in the context of regional geodynamics and, in particular, to determine the volcano-tectonic evolution of the Comoros archipelago. Geophysical data, mainly acquired during the SISMAORE oceanographic cruise (2020-2021), were used to image and describe the architecture of sedimentary, volcanic, sequences and crustal domains around the Comoros archipelago at both local and regional scales. The interpretation of the reflection seismic profiles over the new volcanic structure, Fani Maoré, allowed for imaging the internal structure of the volcano and identifying pre-eruptive paleosurfaces by identifying recent magmatic materials. A consistent seismic stratigraphy of the Comoros basin was established to provide age constraints on volcanic events in the area using the limited well data available in the Comoros basin and the Morondava basin. This seismic stratigraphy revealed that the construction of Mayotte Island began around 28 million years ago, significantly revising previous land-based dating of 10 million years. In the second part, through the analysis of all reflection seismic profiles acquired during the SISMAORE cruise, the different volcanic construction phases of the Comoros archipelago's islands were observed and constrained in age, based on the seismic stratigraphy. At least three major construction phases of Mayotte Island were characterized 28, 22, and 9 million years ago. Similarly, the beginning of the main construction phase for Mohéli (9 million years ago), Anjouan (4 million years ago), Grande Comore (2 million years ago), as well as the Geyser and Zélée Bank (32 million years ago) and the volcanic ridges of the Jumelles (4 million years ago) were identified. The onset of volcanic activity becomes progressively more recent from the easternmost to the westernmost end of the archipelago. This chronological sequence of volcanic activity shares several similarities with the temporal evolution of magmatism in Madagascar and the East African Rift. Magmatic activity began in the Upper Oligocene, followed by a period of quiescence in the Middle Miocene, and then resumed at the end of the Miocene, coinciding with widespread deformation along the East African Rift, including its offshore branches and Madagascar. Thus, the Comoros archipelago may correspond to a branch of the East African Rift initiated as early as the beginning of the Miocene. Finally, in the third part, it is demonstrated that the crust around the Comoros is of an oceanic nature through the study of reflection and refraction seismic profiles. Mapping the depth of the top of the oceanic crust reveals a deeper crustal domain south of the archipelago compared to the north. By correlating fracture zone mapping, the average direction of the Comoros archipelago's islands, and the presence of crustal reactivation involving volcanism, it is suggested that ancient fracture zones in the direction of Somalian basin accretion have at least partially controlled the formation of the Comoros archipelago
Billeaud, Isabelle. "Dynamique de construction d'un prisme sédimentaire littoral en régime mégatidal (la Baie du Mont-Saint-Michel)." Caen, 2007. http://www.theses.fr/2007CAEN2071.
Full textThe Bay of Mt-St-Michel is a megatidal environment, the Holocene sedimentary infill of which began some 8000 years ago. The present-day Bay consists in various sub-environments : an embayment in the West, an estuary in the East, and a sandy barrier subject to wave action in the NE. Thanks to VHR seismic data and cores, different architectures are highlighted : progradational to aggradational in the embayment, aggradational to chanelized in the estuary and along the NE shoreline. The infill model established with all the data is characterised as follows: a transgressive systems tract of low volume; a well-developed highstand systems tract ; a tidal ravinement surface of large extent, reaching locally the substrate; a wave ravinement surface locally present along the estuary margins; an accommodation for sequence preservation of tidal origin in the estuary, and of eustatic origin along the margins. At the basin scale, discrepancies in time-and-space of the preservation potential of sedimentary sequences observed into the infill are very important. As soon as the transgression rate slow down from 6500 yB. P. , the key-control of local factors (hydrodynamics, sediment supply, substrate morphology) is evidenced. Sequences preserved along the estuary margins record environmental changes interpreted as the result of climate crisis of 1500-year period. Although the origin of these climate cycles is uncertain (Bond cycles, long term tidal cycles, combination of both ?), their control on coastal system evolution should be considered as major
Estournes, Guilhem. "Architectures et facteurs de contrôle des bassins quaternaires immergés du précontinent armoricain : exemples de la paléovallée d'Étel (Bretagne Sud) et du bassin des Ecrehou (Golfe normand Breton)." Lorient, 2011. http://www.theses.fr/2011LORIS240.
Full textThe shortage of local aggragate ores (more particularily from alluvial origines) leads industrial companies to prospect for new potential ores including marine areas. The inner continental shelf (0-60 m) corresponds to the offshore extension of continental landscapes, reworked by eustatic, climatic and tectonic variations during the Quaternary (2. 6 Myrs-Today). The objective of this thesis is to characterize both the morphology and sedimentary filling of these basins, making the part of eustatic, climatic and tectonic influences on sediments onset. Two areas, chosen because of their good geological context representativeness, have been studied by seismic reflexion, surfacial coring and 3D topographic and sedimlentary reconstitutions. These two areas are 1) the Palaeo Valley of the Etel River (Southern Brittany) and 2) the Ecrehou Basin in the Normand-Breton Gulf. This study consists in an exploration of poorly known areas, carrying interests for both academic research (continental margins knowledge) and industrial sector (new potential material ores). It appaears that Atlantic inner shelf morphology corresponds to the remnant of fluvial topographies (Mid Pleistocene) several times reused since their onset and showing a poor sediments preservation capacity. The Etel Palaeo valley is only filled with transgressive tidal to marine deposits dated between 9 Kyrs BP to present. The onset of these valleys seems to respond to the evolution of quaternary climate dynamic (Mid Pleistocene Transition) and high frenquency eustatic variations since this period. In the Normand-Breton Gulf, the basin sedimentary filling presents a far better preservation capacity (preserving Early and Late Pleistocene deposits) associated to more active tectonic pattern than the Atlantique margin. This filling is dominated by tidal environnements. Basically, at the scale of the whole Armorican Massif, the tectonic forcing seems to modulate the effect of eustatic variations on sediment preservation. This latter is in any case maximum during transgressions and minimum or negative during sea lowstand periodes
Hawie, Nicolas. "Architecture, geodynamic evolution and sedimentary filling of the levant basin : a 3D quantitative approach based on seismic data." Electronic Thesis or Diss., Paris 6, 2014. http://www.theses.fr/2014PA066048.
Full textSedimentological and biostratigraphic investigations onshore Lebanon coupled with 2D offshore reflection seismic data allowed proposing a new Mesozoic-Present tectono-stratigraphic framework for the northern Levant Margin and Basin. The seismic interpretation supported by in-depth facies analysis permitted to depict the potential depositional environments offshore Lebanon as no well has yet been drilled. The Levant region has been affected by successive geodynamic events that modified the architecture of its margin and basin from a Late Triassic to Middle Jurassic rift into a Late Cretaceous subduction followed by collision and Miocene-Present strike slip motion. The interplay between major geodynamic events as well as sea level fluctuations impacted on the sedimentary infill of the basin. During Jurassic and Cretaceous, the Levant Margin is dominated by the aggradation of a carbonate platform while deepwater mixed-systems prevailed in the basin during the Oligo-Miocene, three major sedimentary pathways are expected to drive important quantities of clastic material into the Levant Basin: (1) canyons along the Levant Margin, (2) the Latakia region (coastlal Syria) and (3) the Nile Deep sea cone. Regional drainage system analysis was performed to estimate the contribution of the different sediment sources to the infill of the basin. A numerical stratigraphic forward model, Dionisos, was used to test the Middle-Late Miocene source-to-sink scenarios permitting to better assess the plausibility of the expected sedimentary volumes for each source through a comparison with actual drainage systems
Bailleul, Julien. "Dynamique sédimentaire et structurale des bassins perchés sur les prismes de subduction : l'exemple du prisme Hikurangi, Nouvelle-Zélande." Lille 1, 2005. https://ori-nuxeo.univ-lille1.fr/nuxeo/site/esupversions/b4e43c20-ebbd-4a96-a923-396142576aea.
Full textLa sédimentation au sein des bassins perchés matures est dominée par les processus de remplissage qui conduisent au développement de méga-séquences de comblement similaires à celles identifiées dans les bassins d'avant-pays. Notre étude montre également que l'évolution du prisme de subduction Hikurangi est discontinue et a été contrôlée par des épisodes tectoniques successifs identifiés le long de la transversale d'Akitio : 1) Une phase de mise en place de nappes au Miocène basal (c. 25 - 18 Ma), 2) Un épisode de raccourcissement E-W au Miocène inférieur à moyen (c. 17. 5 - 15 Ma). Cet épisode est à l'origine du développement de hauts structuraux et du confinement des bassins perchés, 3) Un épisode de subsidence majeure associé à des déformations en extension (c. 15 - 6. 5 Ma) et probablement contrôlée par des processus d'érosion tectonique, et 4) Une période Miocène terminal à Quaternaire (c. 6. 5 - 0 Ma)dominée par des épisodes de raccourcissement rapide (c. 1Ma) de direction E-W à NW-SE. Nous avons démontré que la complexité stratigraphique et structurale du prisme de subduction Hikurangi ne résulte pas seulement de cette histoire tectonique polyphasée, mais aussi de variations transversales dans le style et l'amplitude de la déformation au cours du même épisode tectonique. Nous montrons notamment que de l'accrétion frontale peut se développer près du front de subduction alors que la partie supérieure du prisme subit de l'extension et une phase de subsidence au cours d'une période dominé par de l'érosion tectonique
Barat, Flore. "Nature et structure de l'isthme inter-américain, Panama : implication sur la reconstruction et l'évolution géodynamique de la plaque Caraïbe." Phd thesis, Université Nice Sophia Antipolis, 2013. http://tel.archives-ouvertes.fr/tel-00919431.
Full textJollivet-Castelot, Martin. "Bassin de Dieppe-Hampshire (Manche orientale) : Évolution cénozoïque et enregistrement des évènements géodynamiques." Thesis, Lille 1, 2018. http://www.theses.fr/2018LIL1R051/document.
Full textMajor paleogeographic changes are recorded within Western Europe between the end of Cretaceous and Paleogene times, in response of tectonic events along European plate boundaries. The deformation affecting the NW part of the European plate are already well identified in the Paris Basin, the Belgian Basin and in Southern England, however it is poorly constrained within the English Channel. The objective of this thesis is thus to reconstruct sedimentary and structural evolutions of the Eastern English Channel during Paleogene times, and to replace these evolutions within the geodynamic context of the Western European domain. This thesis has been focalized on the Dieppe-Hampshire Basin, for which the stratigraphy and the timing of the deformation are not precisely known. This work is based on the contribution of new very high resolution seismic reflection data and of new coring samples. The analysis of the sedimentary filling allowed to establish the stratigraphic framework, to propose a sequence stratigraphic division with the identification of four 2nd order cycles between the Thanetian and the Bartonian, and to map the southern part of the basin. The correlation of these cycles with surrounding Cenozoic basins led to evidence five deformation phases which have affected the Anglo-Paris Basin. Thanks to a careful structural analysis, we also detailed the style and the kinematics of the deformation in the Eastern English Channel, we proposed a deformation schedule and we established the role played by the regional structural inheritance on the Paleogene evolution of the domain
Principaud, Mélanie. "Morphologie, architecture et dynamique sédimentaire d'une pente carbonatée moderne : le Great Bahama Bank (Bahamas)." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0301/document.
Full textAn analysis of multi-beam echo sounder, sub-bottom profiler (Chirp) and multichannel seismic,highligths the present-day sedimentary dynamics and the Neogene-Quaternary architectural and stratigraphicevolution along the northwestern leeward margin of the Great Bahama Bank.The morpho-bathymetric analysis reveals an aragonite mud-dominated slope, and a broad spectrum ofsedimentary structures, related to various hydrodynamic processes. The density cascading currents associatedwith tidal currents and prevailing easterly winds correspond to the dominant transport mechanisms operatingalong the margin. The Bimini area displays a short and steep slope, stabilized at shelf edge by rimmed reefalbarrier, which constrains the off-bank export of materials.The stratigraphic architecture shows a complex evolution of the slope during the Neogene. The end ofthe Paleogene is marked by a continuous aggrading slope detached from the shelf by a fault escarpment. It passesinto a low angle slope-apron attached to the platform in the Miocene, and ends with an accretionary system witha steepened slope in the Pleistocene. Although the slope deposits are mud-dominated, they show rapid lateralvariations (< 30 km) from South to North throughout the Neogene with the establishment of turbidite aprons,debrite layers and large Mass Transport Complexes. These facies interact since the Langhian with the SantarenDrift which gradually extends and migrates along the slope until today. The maximum extent of the drift occursduring the upper Pliocene and coincides with a global oceanographic reorganization and major climate changesin the northern hemisphere, related to the closure of the Central American Seaway
Paquet, Fabien. "Evolution morphostructurale des bassins de marge active en subduction : L'exemple du bassin avant-arc de Hawke Bay en nouvelle Zélande." Phd thesis, Université Rennes 1, 2007. http://tel.archives-ouvertes.fr/tel-00342682.
Full textJouet, Gwenael. "Enregistrements stratigraphiques des cycles climatiques et eustatiques du Quaternaire terminal - Modélisations de la marge continentale du Golfe du Lion." Phd thesis, Université de Bretagne occidentale - Brest, 2007. http://tel.archives-ouvertes.fr/tel-00260930.
Full textLes travaux entrepris depuis une dizaine d'années sur la marge du Golfe du Lion (Méditerranée occidentale) montrent qu'il s'agit d'une zone exceptionnelle pour explorer l'impact de la variabilité climatique et glacio-eustatique sur l'organisation stratigraphique des sédiments. Les séquences sédimentaires liées aux grands cycles tardi-pléistocènes de 100 000 ans, révélées par la sismique, ont été échantillonnées et interprétées grâce aux données multi-proxies des forages du projet européen "Promess-1". La révision du modèle stratigraphique de la marge, propagé sur l'ensemble de la plateforme, a contribué à préciser les modèles conceptuels de la stratigraphie séquentielle. L'analyse sismo- et litho-stratigraphique à plus haute résolution révèle également l'enregistrement de séquences liées à des cycles climatiques beaucoup plus courts durant le dernier cycle glaciaire (~130 000 ans). L'association des événements de Heinrich et de Dansgaard-Oeschger dans les cycles génériques de Bond présente une expression stratigraphique distincte, sous la forme de paraséquences régressives. Enfin, la modélisation de l'agencement des structures sédimentaires associées à la remontée du niveau marin lors de la dernière déglaciation (~20 000 ans) souligne le rôle des événements climatiques extrêmes dans la formation du message sédimentaire. Cette étude présente enfin une confirmation semi-quantitative et bien contrainte dans le temps, du rôle fondamental des variations du niveau marin et des flux sédimentaires dans l'organisation des séquences de dépôt, y compris à l'échelle des événements climatiques rapides.