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| Registros recuperados: 20 | |
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| Leroux, Estelle; Aslanian, Daniel; Rabineau, Marina; Pellen, Romain; Moulin, Maryline. |
| A review of geological and geophysical observations points towards a worldwide kinematic change at around 6 Ma. The synchronicity of many manifestations (tectonics, magmatism, kinematics, ecological events, among others) at ~6 Ma, similar to those recognized from time to time on the geological timescale, argues for a global geodynamic event that has led to many regional consequences on Earth's surface. In particular, we propose that this global event was the main trigger for the three fold increase in sediment deposits in the world ocean over the last ~5 Ma, but also for the onset of the Messinian Salinity Crisis in the Mediterranean area, one of the most severe ecological crises in the Earth's history. We suggest this Messinian revolution to be the last... |
| Tipo: Text |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00422/53362/54204.pdf |
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| Pellen, Romain; Aslanian, Daniel; Rabineau, Marina; Leroux, Estelle; Gorini, Christian; Silenziario, Carmine; Blanpied, Christian; Rubino, Jean-loup. |
| Detailed analyses of seismic profiles and boreholes in the Valencia Basin (VB) reveal a differentiated basin, the Minorca Basin (MB), lying between the old Mesozoic Valencia Basin sensu strico (VBss) and the young Oligocene Liguro-Provençal Basin (LPB). The relationship between these basins is shown through the correlation of four Miocene-to-present-day megasequences. The Central and North Balearic Fracture Zones (CFZ and NBFZ) that border the MB represent two morphological and geodynamical thresholds that created an accommodation in steps between the three domains. Little to no horizontal Neogene movements are found for the Ibiza and Majorca Islands. In contrast, the counterclockwise movement of the Corso-Sardinian blocks induced a counterclockwise... |
| Tipo: Text |
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| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00333/44417/46728.pdf |
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| Pasquier, V.; Revillon, Sidonie; Leroux, Estelle; Molliex, Stephane; Mocochain, L.; Rabineau, Marina. |
| The terrigenous sedimentary budget of passive margins, records variations in past sedimentary fluxes, and thus can be used to infer past variations of Earth surface deformation processes or climate change. Accurate estimates of sediment fluxes over various times and spatial scales are therefore crucial. Traditionally, offshore sediment volume determination only considers siliciclastic accumulation, the carbonate fraction (i.e., CaCO3) being considered only as in situ production. Here we propose a new geochemical methodology to decipher and quantify the number of detrital carbonates in comparison to in situ produced biogenic carbonates. This isotopic approach enables considering the export of detrital carbonates and investigating its effect on sediment... |
| Tipo: Text |
Palavras-chave: Sr-87/Sr-86(carbonate); Detrital carbonate export; Source-to-sink; Glacial - interglacial; Strontium isotope stratigraphy. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00505/61638/65563.pdf |
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| Leroux, Estelle; Rabineau, Marina; Aslanian, Daniel; Gorini, Christian; Molliex, Stephane; Bache, Francois; Robin, Cecile; Droz, Laurence; Moulin, Maryline; Poort, Jeffrey; Rubino, Jean-loup; Suc, Jean-pierre. |
| Basin-wide correlation of Messinian units and Plio-Quaternary chronostratigraphic markers (5.3 Ma, 2.6 Ma, 0.9 Ma and 0.45 Ma), the mapping of total sediment thickness and the determination of overall sedimentary volumes enabled us to provide a high-resolution quantitative history of sediment volumes for the last 6 Ma along the Gulf of Lions margin. The results point to (i) a dramatic increase in terrigenous sediment input during the Messinian Salinity Crisis. This increased sedimentation reflects enhanced regional fluvial erosion related to the dramatic fall of Mediterranean base-level. Stronger weathering due to a regional wetter climate probably also increased erosional fluxes. (ii) A sediment input three times higher during the Plio-Quaternary compared... |
| Tipo: Text |
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| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00310/42087/41520.pdf |
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| Leroux, Estelle; Rabineau, Marina; Aslanian, Daniel; Granjeon, Didier; Droz, Laurence; Gorini, Christian. |
| Determining the relative importance of factors interacting to control stratigraphic organization is a key issue in sedimentology. The Pliocene-Quaternary chronostratigraphy on the Gulf of Lions platform is still poorly constrained, giving rise to different interpretations of the evolution of its subsidence through time. This paper examines the Pliocene-Quaternary sedimentary filling of the Gulf of Lion's shelf with Dionisos, a numerical stratigraphic model. Our results show that a constant subsidence rate accurately reproduces the observed geometries, whereas a varying subsidence rate reproduces them only if the acceleration of subsidence is limited. At this time-scale, a third-order eustatic curve is also reappraised: a higher resolution curve (built... |
| Tipo: Text |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00173/28384/26752.pdf |
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| Badhani, Shray; Cattaneo, Antonio; Collico, Stefano; Urgeles, Roger; Dennielou, Bernard; Leroux, Estelle; Colin, Florent; Garziglia, Sebastien; Rabineau, Marina; Droz, Laurence. |
| The Gulf of Lions presents recurring mass-transport deposits (MTDs) within the Plio-Quaternary sediments suggesting a long history of mass movements. The two large, surficial MTDs are located on the eastern and western levee of the Rhone canyon over an area exceeding 6000 km2 and volumes exceeding 100 km3. Both MTDs were emplaced 21 ka ago (peak of the Last Glacial Maximum), suggesting a common trigger. Here, we present a multidisciplinary high-resolution geophysical, sedimentological and in-situ geotechnical study of the source and deposit areas of both MTDs to characterise distinct expressions of sediment deformation as well as their spatial and chronological distributions. We show the internal structure of mass movements and resulting MTDs with... |
| Tipo: Text |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00611/72289/71122.pdf |
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| Bache, Francois; Popescu, Speranta-maria; Rabineau, Marina; Gorini, Christian; Suc, Jean-pierre; Clauzon, Georges; Olivet, Jean-louis; Rubino, Jean-loup; Melinte-dobrinescu, Mihaela Carmen; Estrada, Ferran; Londeix, Laurent; Armijo, Rolando; Meyer, Bertrand; Jolivet, Laurent; Jouannic, Gwenael; Leroux, Estelle; Aslanian, Daniel; Dos Reis, Antonio Tadeu; Mocochain, Ludovic; Dumurdzanov, Nikola; Zagorchev, Ivan; Lesic, Vesna; Tomic, Dragana; Cagatay, M. Namik; Brun, Jean_pierre; Sokoutis, Dimitrios; Csato, Istvan; Ucarkus, Gulsen; Cakir, Ziyadin. |
| The Messinian Salinity Crisis is well known to have resulted from a significant drop of the Mediterranean sea level. Considering both onshore and offshore observations, the subsequent reflooding is generally thought to have been very sudden. We present here offshore seismic evidence from the Gulf of Lions and re-visited onshore data from Italy and Turkey that lead to a new concept of a two-step reflooding of the Mediterranean Basin after the Messinian Salinity Crisis. The refilling was first moderate and relatively slow accompanied by transgressive ravinement, and later on very rapid, preserving the subaerial Messinian Erosional Surface. The amplitude of these two successive rises of sea level has been estimated at =500 similar to m for the first rise and... |
| Tipo: Text |
Palavras-chave: Paleo environmental changes; Miocene pliocene boundary; Section marche province; Earliest zanclean age; Desiccated deep basin; Di tetto formations; Northern apennines; Southern France; Decic basin; Depositional environments. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00076/18774/16490.pdf |
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| Leroux, Estelle; Aslanian, Daniel; Rabineau, Marina; Moulin, Maryline; Granjeon, Didier; Gorini, Christian; Droz, Laurence. |
| Deep Earth dynamics impact so strongly on surface geological processes that we can use sediment palaeo-markers as a window into the deeper Earth. Derived from climatic and tectonic erosive actions on the continents, and related to eustasy, subsidence and isostasy, the sediment in a deep basin is the main recorder of these processes. Nevertheless, defining and quantifying the relative roles of parameters that interact to give the final sedimentary architecture is not a simple task. Using a 3D-grid of seismic and wide-angle data, boreholes and numerical stratigraphic modelling, we propose here a quantification of post-rift vertical movements in the Provençal Basin (West Mediterranean) involving three domains of subsidence: seaward tilting on the platform and... |
| Tipo: Text |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00253/36466/37817.pdf |
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| Chima, Kelvin I.; Do Couto, Damien; Leroux, Estelle; Gardin, Silvia; Hoggmascall, Nick; Rabineau, Marina; Granjeon, Didier; Gorini, Christian. |
| Located on a divergent margin dominated by gravity tectonics above overpressured marine shales, the Niger Delta slope has been described as having a stepped profile characterized by ‘filled ponded basins’ that are prone to erosion and sediment bypass. Previous studies based on 3D seismic data have described the depositional architecture of the western Niger Delta's upper slope, but calibration of the seismic facies is lacking and the timing of major changes in sedimentary record remains elusive. In this study, seismic sequence-stratigraphy, 3D geomorphological analyses of high-resolution 3D seismic data, and bio/chronostratigraphic analyses from four boreholes, enabled the identification and characterization of the depositional architecture in Neogene... |
| Tipo: Text |
Palavras-chave: West Africa; Niger Delta; Seismic sequence stratigraphy; Filled ponded basins; Mass-transport deposits; Turbidite systems; Chronostratigraphy. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00503/61492/65302.pdf |
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| Pellen, Romain; Aslanian, Daniel; Rabineau, Marina; Suc, J.p.; Gorini, C.; Leroux, Estelle; Blanpied, C.; Silenziario, C.; Popescu, S.m.; Rubino, J.l.. |
| Morphological sills condition sedimentary, water and fauna exchanges between different domains. In particular, sills are crucial factors to consider during the Messinian Salinity Crisis (MSC) palaeogeographic evolution (5.97–5.33 Ma) of the NW Mediterranean area. Here we focus on the Ebro River and its up to now unexplained short Messinian onshore length (~100 km) compared to that of the Messinian Rhone River (~480 km) despite similar present-day drainage basins. Thanks to an extensive seismic and borehole dataset, we present a new interpretation of a complete 270 km long Messinian Ebro incised-valley system course underneath the present-day continental margin and bathyal basin and its related distal detrital deposits. These results favour a syn-MSC or... |
| Tipo: Text |
Palavras-chave: NW Mediterranean Sea; Segmentation; Knickpoint; Ebro fluvial system; Messinian Salinity Crisis; Incised-valley system. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00506/61768/65747.pdf |
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| Rabineau, Marina; Leroux, Estelle; Aslanian, Daniel; Bache, F.; Gorini, Christian; Moulin, Maryline; Molliex, Stephane; Droz, Laurence; Dos Reis, Antonio; Rubino, J. L.; Guillocheau, Francois; Olivet, Jean-louis. |
| Passive margins are characterised by an important tectonic and thermal subsidence, which favours a good preservation of sedimentary sequences. This sedimentation in turn enhances the subsidence because of loading effects. We present here a direct method based on sedimentary markers seen on seismic data, to evaluate total subsidence rates from the coast to the outer shelf and to the deep basin in the Gulf of Lion, from the beginning of massive salt deposition up to present day (the last circa 6 Ma) with minimal theoretical assumptions. On the shelf, the Pliocene-Quaternary subsidence shows a seaward tilt reaching a rate of 240 m/Ma (±15 m/Ma) at the shelf break (70 km from the present day coastline) (i.e. a total angle of rotation of 0.88° (0.16°/Ma)). We... |
| Tipo: Text |
Palavras-chave: Subsidence; Pliocene-quaternary; Messinian salinity crisis; Isostasy; Mediterranean Sea; Gulf of Lion. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00171/28176/32147.pdf |
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| Cattaneo, Antonio; Badhani, Shray; Caradonna, Cristina; Bellucci, Massimo; Leroux, Estelle; Babonneau, Nathalie; Garziglia, Sebastien; Poort, Jeffrey; Akhmanov, Grigorii G.; Bayon, Germain; Dennielou, Bernard; Jouet, Gwenael; Migeon, Sebastien; Rabineau, Marina; Droz, Laurence; Clare, Michael. |
| Megabeds are thick sedimentary layers extending over thousands square kilometres in deep sea basins and are thought to result from large slope failures triggered by major external events. Such deposits have been found in at least three areas of the Mediterranean Sea. Although their discovery dates back to the early 1980s, many questions remain, concerning their initiation, source area, extent, and the nature of their emplacement. One of the largest previously documented megabeds was emplaced during the Last Glacial Maximum across the Balearic Abyssal Plain with a thickness of 8-10 m in water depths of up to 2800 m. New 3.5 kHz sub-bottom profiles and sediment cores provide greater constraint on the lateral variability of the megabed and allow to map it... |
| Tipo: Text |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00614/72597/71595.pdf |
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| Badhani, Shray; Cattaneo, Antonio; Dennielou, Bernard; Leroux, Estelle; Colin, Florent; Thomas, Yannick; Jouet, Gwenael; Rabineau, Marina; Droz, Laurence. |
| The Gulf of Lions (NW Mediterranean Sea) is a SW-NE oriented passive continental margin formed since the Oligocene. It presents small to large scale mass movement features suggesting a long history of seafloor instability. Of particular interest are the two surficial large mass-transport deposits along the Rhone turbiditic levee, known as the Rhone Eastern and Western Mass-Transport Deposits (REMTD and RWMTD). With the help of the recently acquired multi-beam bathymetric, sub-bottom profiler, high-resolution seismic and sedimentological data, we investigate the morphology, timing, kinematics, and possible triggering mechanisms of the source area of the REMTD, which we refer to as the Eastern Rhone Interfluve Slide (ERIS). ERIS has an estimated run-out... |
| Tipo: Text |
Palavras-chave: Submarine landslide; Mass transport deposits; Gulf of Lions; Western Mediterranean; Turbiditic levees. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00592/70396/68480.pdf |
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| Leroux, Estelle; Rabineau, Marina; Aslanian, Daniel; Gorini, Christian; Bache, Francois; Moulin, Maryline; Pellen, Romain; Granjeon, Didier; Rubino, Jean-loup. |
| The sedimentary architecture of basins and passive margins is determined by a complex interaction of parameters, including subsidence, eustasy, and sediment supply. A quantification of the post-rift (20 Ma-0 Ma) vertical movements of the Gulf of Lion (West Mediterranean) is proposed here based on the stratigraphic study of sedimentary paleomarkers using a large 3D grid of reflection seismic data, correlations with existing drillings, and refraction data. Post-rift subsidence was measured by the direct use of sedimentary geometries analysed in 3D and validated by numerical stratigraphic modelling. Three domains of subsidence were found: on the continental shelf and slope, subsidence corresponds to a seaward tilting with different amplitudes, whereas the... |
| Tipo: Text |
Palavras-chave: Modélisations stratigraphiques; Stratigraphie sismique; Golfe du Lion; Post-Rift subsidence; Crise de salinité messinienne; Processus profonds et superficiels; Stratigraphic modelling; Seismic stratigraphy; Gulf of Lion; Post-rift subsidence; Messinian salinity crisis; Deep and surface processes. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00283/39421/37903.pdf |
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| Counts, John; Jorry, Stephan; Leroux, Estelle; Miramontes, Elda; Jouet, Gwenael. |
| Recently acquired data from the Iles Eparses (southwestern Indian Ocean) reveal new information about the geomorphology, depositional processes, and sedimentary deposits on the slopes of atolls and atoll-like platforms. The deposits discussed here lie on the deepwater flanks of isolated, inactive volcanos that are capped by shallow, relatively flat carbonate platforms 45–210 km2 in area. Much of the slope geomorphology is controlled by the underlying volcanic edifice. Steep (~25–35°) upper slopes consist of outcrops of volcanic basement, smooth banks, failure scarps, and channels. Sedimentary features seen in the lower slope and proximal basin (2000–3500 m deep) consist of channels, levees, lobes, and mass transport deposits (MTDs). In places, channels... |
| Tipo: Text |
Palavras-chave: Atoll; Carbonate; Indian Ocean; Slope; Deepwater sediments. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00450/56136/57802.pdf |
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| Poort, Jeffrey; Lucazeau, Francis; Le Gal, Virginie; Dal Cin, Michaela; Leroux, Estelle; Bouzid, Abderrezak; Rabineau, Marina; Palomino, Désirée; Battani, Anne; Akhmanov G., Grigory; Ferrante G., Matilde; Gafurova R., Dina; Si Bachir, Roza; Koptev, Alexander; Tremblin, Maxime; Bellucci, Massimo; Pellen, Romain; Camerlenghi, Angelonghi; Migeon, Sebastien; Alonso, Belen; Ercilla, Gemma; Yelles-chaouche A., Karim; Khlystov M., Oleg. |
| The Western Mediterranean basin has been formed by Miocene back-arc extension and is underlain by a thin and young lithosphere. This young lithosphere is warm, as testified by an overall elevated offshore heat flow. Heat flow within the Western Mediterranean is, however, highly variable and existing data are unevenly distributed and poorly studied in the central part of the Liguro-Provençal and Algero-Balearic basins. This central part is floored by a young oceanic crust, bordered by different continental margins, cut by transform faults, and filled by up to 8 km of sediments. We present a total of 148 new heat flow data collected during the MedSalt and WestMedFlux cruises in 2015 and 2016 and aligned along seven regional profiles that show an important... |
| Tipo: Text |
Palavras-chave: Heat flow; Western Mediterranean Sea; Liguro-Provencal basin; Algero-Balearic basin; Continental margins; Oceanic crust. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00588/70052/67992.pdf |
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| Leroux, Estelle; Counts, J.; Jorry, Stephan; Jouet, Gwenael; Révillon, Sidonie; Boudagher-fadel, M.k.; Courgeon, S.; Berthod, C.; Ruffet, G.; Bachèlery, P.; Grenard-grand, E.. |
| Little is known about the geological history of the Glorieuses seamount including basic information about its age and origin related to the regional evolution of the southern tip of the Somali Basin. This study focused on describing and reconstructing the long-term stratigraphic evolution of the Glorieuses seamount (SW Indian Ocean) to identify the mechanisms that have occurred through time to finally shape the emerged modern islands. Distinct terrace levels, currently submerged along the flanks of the seamount and surrounding seamounts, have already been interpreted as resulting from successive carbonate development and back-stepping episodes over the last 62 Myr. New isotopic and biostratigraphic dating on the flanks of the seamount, coupled with... |
| Tipo: Text |
Palavras-chave: Glorieuses seamount; Somali Basin; Seismic stratigraphy; Tectonics; Vertical movement (uplift and subsidence); Volcanism; Shallow-water carbonate platform; Ar-40/Ar-39. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00628/73965/73324.pdf |
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| Leroux, Estelle. |
| The Gulf of Lions and the Provençal basin have been studied intensively at variable timescale. However, sedimentary budgets and vertical movements of the margin remained largely unknown. This work aims to quantify them using a large grid of seismic data and their interpretations with seismic and sequential stratigraphy concepts [Vail et al., 1977], correlations with existing drillings, refraction data and validation by numerical stratigraphic modeling with Dionisos [Granjeon and Joseph, 1999]. A stratigraphic continuity of reflectors from the platform to the slope and to the deep basin has been established describing the architecture of the sedimentary filling of the entire margin. Plio-pleistocene stratigraphic markers (at 2.6 My, 1.6 My, 0.9 My and 0.45... |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00108/21967/20278.pdf |
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| Bache, Francois; Gargani, Julien; Suc, Jean-pierre; Gorini, Christian; Rabineau, Marina; Popescu, Speranta-maria; Leroux, Estelle; Do Couto, Damien; Jouannic, Gwenael; Rubino, Jean-loup; Olivet, Jean-louis; Clauzon, Georges; Dos Reis, Antonio Tadeu; Aslanian, Daniel. |
| The Messinian Salinity Crisis resulted from desiccation of the Mediterranean Sea after its isolation from the Atlantic Ocean at the end of the Miocene. Stratal geometry tied to borehole data in the Gulf of Lions show that the pre-crisis continental shelf has been eroded during a major sea-level fall and that sediments from this erosion have been deposited in the basin. This detrital package is onlapped by high amplitude seismic reflectors overlain by the “Messinian Salt” and the “Upper Evaporites”. Towards the shelf, the transition between regressive deposits and overlying onlapping sediments is characterised by a wave-ravinement surface, suggesting that a significant part of the onlapping reflectors and overlying Messinian Evaporites were deposited during... |
| Tipo: Text |
Palavras-chave: Messinian; Mediterranean; Gulf of Lions; Seismic stratigraphy; Evaporites. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00248/35887/34408.pdf |
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| Aslanian, Daniel; Moulin, Maryline; Schnurle, Philippe; Klingelhoefer, Fraucke; Leroux, Estelle; Rabineau, Marina; Gailler, Audrey; Bache, Francois; Gorini, Christian; Kuroda, J.; Eguchi, N.; Droxler, Andre W.; Alain, Karine; Roure, François; Haq, B.. |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00149/26055/24160.pdf |
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| Registros recuperados: 20 | |
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