Consulta: subjectFacets:"Gulf of Lion"
Registros recuperados: 25
Data/hora: 01/06/2024 16:31:26

Processus et enregistrements sédimentaires dans les canyons sous-marins Bourcart et de Capbreton durant le dernier cycle climatique.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gaudin, Mathieu.
Submarine canyons cutting continental shelves and slopes are considered to be erosive features allowing continental derived sediment to reach the deep sea. In order to better understand their sedimentary dynamic and morphologic evolution through time, two submarine canyons, the Bourcart canyon in the Gulf of Lion and the Capbreton canyon in the Bay of Biscay have been studied. The Bourcart canyon, located at the shelf break at 110 m water depth, is disconnected from direct sediment supply during sea-level highstand and is considered as inactive. The Capbreton canyon's head is located 400 m off the coastline, and is disconnected from the Adour river since the 16th century. Bathymetric, core, radioisotopic and current data showed that these canyons are...
Tipo: Text
Palavras-chave: Seal level variations; Last climatic cycle; Gravity currents; Dense water cascading; Coarse grained sedimentation; Gulf of Lion; Bay of Biscay; Submarine canyon; Variations du niveau marin; Dernier cycle climatique; Courants gravitaires; Plongées d'eau dense; Sédimentation sableuse; Golfe du Lion; Golfe de Gascogne; Canyon sous marin.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/these-2511.pdf

A review of the LATEX project: mesoscale to submesoscale processes in a coastal environment
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Petrenko, Anne A.; Doglioli, Andrea M.; Nencioli, Francesco; Kersale, Marion; Hu, Ziyuan; D'Ovidio, Francesco.
The main objective of the LAgrangian Transport EXperiment (LATEX) project was to study the influence of coastal mesoscale and submesoscale physical processes on circulation dynamics, cross-shelf exchanges, and biogeochemistry in the western continental shelf of the Gulf of Lion, Northwestern Mediterranean Sea. LATEX was a five-year multidisciplinary project based on the combined analysis of numerical model simulations and multi-platform field experiments. The model component included a ten year realistic 3D numerical simulation, with a 1 km hor-izontal resolution over the gulf, nested in a coarser 3 km resolution model. The in situ component involved four cruises, including a large-scale multidisciplinary campaign with two research vessels in 2010. This...
Tipo: Text
Palavras-chave: Mesoscale; Submesoscale; Lagrangian; Gulf of Lion; Northwestern mediterranean sea; Cross shelf flux.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00472/58351/83608.pdf

Subseafloor stratigraphic profiling and soil classification from piezocone tests: A case study in the Gulf of Lion (NW Mediterranean Sea)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lafuerza, S.; Frigola, J.; Canals, M.; Jouet, Gwenael; Bassetti, Maria-angela; Sultan, Nabil; Berne, Serge.
We show the results provided by piezocone tests in determining the stratigraphic profile and the soil classification of two drilling sites in the outer shelf and the upper slope of the Gulf of Lion, PRGL2 and PRGL1, respectively. Correlations with grain-size data indicate that sleeve friction can be used for profiling fine-grained sediments (site PRGL1), whereas cone tip resistance is the most adequate for sequences made of alternations of coarse- and fine-grained intervals (site PRGL2). Normalized cone resistance and friction ratio proved to be also appropriate for soil stratigraphy as it depicts trends in the coarse fraction of the tested soil. Silts and clays present in similar proportions at site PRGL1 responded to piezocone testing as pure clays...
Tipo: Text
Palavras-chave: Gulf of Lion; Soil classification; Stratigraphy; Piezocone.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-6121.pdf

Sedimentary sequences in the Gulf of Lion: A record of 100,000 years climatic cycles
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rabineau, Marina; Berne, Serge; Aslanian, Daniel; Olivet, Jean-louis; Joseph, Philippe; Guillocheau, François; Bourillet, Jean-francois; Le Drezen, Eliane; Granjeon, Didier.
The wide continental shelf of the Gulf of Lion (up to 70 km) has been the object of numerous investigations since the early days of oceanography. Yet, the question of sequences duration, the mechanisms of deposition and factors implied remained unanswered. A study of a very dense grid of Very High Resolution (VHR) seismic reflection (Sparker) data associated with surficial cores both, collected by IFREMER between 1992 and 2001 on the outer shelf and upper slope offshore of Sète in the Languedoc region gives a new insight into these issues. Analysis of the 3D geometry of the sedimentary record reveals a basic depositional pattern consisting of a pair of horizontally juxtaposed and downlapping prisms. Prism PI with low angle clinoforms (&lt;1°) lies on the...
Tipo: Text
Palavras-chave: Stratigraphic modelling; Cores; High resolution seismic data; Glacioeustatism; Climatic cycles; Gulf of Lion; Western Mediterranean.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-368.pdf

The FETCH experiment: An overview - art. no. 8053
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hauser, Danièle; Branger, H; Bouffies Cloche, S; Despiau, S; Drennan, W; Dupuis, H; Durand, P; De Madron, X; Estournel, C; Eymard, L; Flamant, C; Graber, H; Guerin, C; Kahma, K; Lachaud, G; Lefevre, J; Pelon, J; Petterson, H; Piguet, B; Queffeulou, Pierre; Tailliez, D; Tournadre, Jean; Weill, A.
The "flux, etat de la mer, et tele'de'tection en conditions de fetch variable'' (FETCH) was aimed at studying the physical processes associated with air-sea exchanges and mesoscale oceanic circulation in a coastal region dominated by frequent strong offshore winds. The experiment took place in March-April 1998 in the northwestern Mediterranean Sea (Gulf of Lion). Observations were collected with the R/V L'Atalante, with an air-sea interaction spar (ASIS) buoy, with waverider buoys, and with research aircraft equipped for in situ and remote sensing measurements. The present paper is an introduction to the following special section, which groups 12 papers (including this one) presenting results on turbulent flux measurements at the ocean surface, on the...
Tipo: Text
Palavras-chave: Gulf of Lion; Coastal oceanography; Marine atmospheric boundary layer; Remote sensing; Surface ocean waves; Air/sea interactions.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-747.pdf

Deep crustal structure across a young passive margin from wide-angle and reflection seismic data (The SARDINIA Experiment) - I. Gulf of Lion's margin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Moulin, Maryline; Klingelhoefer, Frauke; Afilhado, Alexandra; Aslanian, Daniel; Schnurle, Philippe; Nouze, Herve; Rabineau, Marina; Beslier, Marie-odile; Feld, Aurelie.
The conjugate margins system of the Gulf of Lion and West Sardinia (GLWS) represents a unique natural laboratory for addressing fundamental questions about rifting due to its landlocked situation, its youth, its thick sedimentary layers, including prominent palaeo-marker such as the MSC event, and the amount of available data and multidisciplinary studies. The main goals of the SARDINIA experiment, were to (i) investigate the deep structure of the entire system within the two conjugate margins: the Gulf of Lion and West Sardinia, (ii) characterize the nature of the crust, and (iii) define the geometry of the basin and provide important constrains on its genesis. This paper presents the results of P-wave velocity modelling on three coincident near-vertical...
Tipo: Text
Palavras-chave: Marge continentale passive; Structure crustale; Réfraction; Golfe du Lion; Croûte océanique; Domaine transitionnel; Continental passive margin; Crustal structure; Wide-angle seismic; Gulf of Lion; Oceanic crust; Transitional domain.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00283/39422/38269.pdf

Trawling-induced resuspension and dispersal of muddy sediments and dissolved elements in the Gulf of Lion (NW Mediterranean)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Madron, X; Ferre, B; Le Corre, Gildas; Grenz, C; Conan, P; Pujo Pay, M; Buscail, R; Bodiot, O.
A dedicated trawling experiment was performed at three sites on the Gulf of Lion continental shelf, with the aim of assessing the resuspension of particulate and dissolved matter triggered by different types of trawls on muddy sediments. The different configurations were: (i) bottom trawl, with bobbin for ground rope (Rockhopper): (ii) bottom trawl, without bobbin (Medits); and (iii) pelagic trawl, towed at 1 and 10m above the seabed.   The plumes of resuspended sediment were measured using the acoustic backscattered intensity, from a towed ADCP. Concomitant profiles of particle size-distribution, light transmission and water samples were collected, outside and inside the plumes. The analysis of the data enabled derivation of the major physical and...
Tipo: Text
Palavras-chave: Northwestern Mediterranean Sea; Gulf of Lion; Suspended particulate matter; Sediment resuspension; Cohesive sediments; Bottom trawling; Coastal fisheries.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-1355.pdf

Seasonal variability of the advective transport of particulate matter and organic carbon in the Gulf of Lion (NW Mediterranean)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lapouyade, Agnes; Durrieu De Madron, Xavier.
Nine hydrographic cruises were performed on the Gulf of Lion continental margin between June 1993 and July 1996. These observations are analysed to quantify the fluxes of particulate matter and organic carbon transported along the slope by the Northern Current and to characterise their seasonal variability. Concentration of particulate matter and organic carbon are derived from light-transmission data and water sample analyses. The circulation is estimated from the geostrophic current field. The uncertainty on the transport estimate, related to the error on the prediction of particle concentrations from light-transmission data and the error on velocities, is assessed. The particulate matter inflow entering the Gulf of Lion off Marseille is comparable to...
Tipo: Text
Palavras-chave: Transport advectif; Bilans; Golfe du Lion; Matière particulaire; Carbone organique; Advective transport; Budget; Gulf of Lion; Organic carbon; Particulate matter.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00322/43357/42823.pdf

Evolution oligo miocène des marges du micro océan Liguro-Provençal
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bache, François.
The Gulf of Lion margin has been created by an Oligo-Aquitanian rifting followed by oceanic accretion in the Provencal basin during the Burdigalian. Two main periods have been detailed in this thesis:  • The Messinian event that needs to be differentiated from earlier strata deposition. The event also represents a clear marker (between 7 and 5,3 Ma) within the history of the basin.  • The initial period of margin formation, from the beginning of continental extension (35-30 Ma) to oceanisation (around 20 Ma) The database for this study has been built using all available data (seismic and wells from industry) on the shelf, the slope and the deep basin of the Gulf of Lion. The gathering of this huge database occurred in the framework of the French GDRMarges...
Tipo: Text
Palavras-chave: Thermal anomaly; Passive Margins; Subsidence; Rifting; Detritism; Erosion; Salinity Crisis; Miocene; Messinian; Mediterranean; Gulf of Lion; Anomalie thermique; Marges passives; Subsidence; Rifting; Détritisme; Érosion; Crise de salinité; Miocène; Messinien; Méditerranée; Golfe du Lion.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/these-4768.pdf

Functional differences between fish communities on artificial and natural reefs: a case study along the French Catalan coast
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Koeck, Barbara; Tessier, Anne; Brind'Amour, Anik; Pastor, Jeremy; Bijaoui, Benjamin; Dalias, Nicolas; Astruch, Patrick; Saragoni, Gilles; Lenfant, Philippe.
In the context of growing anthropogenic disturbances that deeply alter marine coastal ecosystems, various management tools are used to protect biodiversity, such as fishing gear limitations, fishing quotas, protected areas or the creation of artificial reefs (ARs). In contrast to the other management tools, ARs require a modification of natural habitats. We used underwater visual censuses to investigate the effect of habitat modification on the structure of fish communities by comparing a natural reef (NR) to ARs with different habitat complexity. Different fish assemblage descriptors were used to assess species- and functional- and community-level aspects of the assemblages. ARs were rapidly colonized by adult fishes and presented community compositions...
Tipo: Text
Palavras-chave: Ecological niche; Fish community; Fisheries management; Functional diversity; Gulf of Lion; Habitat complexity; Mediterranean Sea; Underwater visual census.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00189/30029/28514.pdf

Quantifying subsidence and isostatic readjustment using sedimentary paleomarkers, example from the Gulf of Lion
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

Distribution des microplastiques dans les eaux de sub-surfaces, en Méditerranéenne nord-occidentale
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Martinot, Pauline.
Between April and November 2018, 20 microplastic (MPs) samples were collected at 8 sampling stations in French Mediterranean coast from Port-Cros to Banyuls as well as upstream the Rhône River. MPs were found in every sample with variable concentrations, size range and colors. Concentrations ranged from 11 items (Port-Cros) to 15 178 items (Port-Saint-Louis low salinity, PS). The samples with the highest MPs count originate from PS and the Bay of Marseille. MPs count in Spring and Autumn results in 217 (± 12,3) and 351 (± 4,3) respectively for the Bay and particles &gt;1 000 μm dominated sampling stations during both seasons, while PS samples showed greater variability in size distribution. The site PS, near the Rhône River, has the most fiber and the...
Tipo: Text
Palavras-chave: Débris marins; Microplastiques; Mer Méditerrannée; Golfe du Lion; Fleuve du Rhône.; Marine litter; Microplastics; Mediterranean Sea; Gulf of Lion; Rhône River.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00632/74419/74137.pdf

Seafloor litter from the continental shelf and canyons in French Mediterranean Water: Distribution, typologies and trends
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gerigny, Olivia; Brun, Melanie; Fabri, Marie-claire; Tomasino, Corinne; Le Moigne, Morgan; Jadaud, Angelique; Galgani, Francois.
Seafloor litter has been studied both on the continental shelves (by trawling during 24 years) and in canyons (by ROV) of the French Mediterranean sea Water (FMW). On the continental shelf, mean densities range from 49.63 to 289.01 items/km2. The most abundant categories were plastic, glass/ceramics, metals and textiles. Trend analysis shows a significant increase in plastic quantities during the study period. Plastics accumulate at all depths, with heavier items being found in deeper areas, while the continental slope-break appears as a clean area. The spatial distribution of litter revealed the influence of geomorphologic factors, anthropic activities, shipping route, river inputs. All the canyons are affected by debris but coastal canyons (Ligurian Sea...
Tipo: Text
Palavras-chave: Marine litter; Seafloor; Canyon; Mediterranean Sea; Gulf of Lion; Corsica.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00507/61868/66074.pdf

Axial incision: The key to understand submarine canyon evolution (in the western Gulf of Lion)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baztan, Juan; Berne, Serge; Olivet, Jean-louis; Rabineau, Marina; Aslanian, Daniel; Gaudin, Mathieu; Rehault, Jean Pierre; Canals, M.
A detailed morphological analysis of the outer shelf and continental slope of the Western Gulf of Lion is presented, based on swath bathymetry data together with sub-bottom profiles and high resolution seismic reflection profiles. These data reveal two main erosive features, of very different dimensions: the axial incision and the canyon's major valley. The height of axial incisions' flanks with respect to the canyon deepest point (the thalweg) ranges from 40 to 150 m. It creates a small axial erosive path within the canyon's major valley, which is typically bounded by flanks of more than 700 m in height. We interpret the axial incision observed in the sea floor as the imprint of turbidity currents that eroded the floor of canyons during phases of...
Tipo: Text
Palavras-chave: Submarine canyon; Axial incision; Gulf of Lion.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-353.pdf

Overpressure within upper continental slope sediments from CPTU data, Gulf of Lion, NW Mediterranean Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lafuerza, S.; Sultan, Nabil; Canals, M.; Frigola, J.; Berne, Serge; Jouet, Gwenael; Galavazi, M.; Sierro, F. J.
Data from in situ piezocone tests (CPTU) and laboratory analyses are utilized for the interpretation of the stress history of Quaternary sedimentary sequences in the upper continental slope of the Gulf of Lion, northwestern Mediterranean Sea. A CPTU based preconsolidation pressure profile referenced to the current effective stress indicates that the deposit is underconsolidated from 12 meters below the seafloor (mbsf) down to at least 150 mbsf. Excess pore pressure below 12 mbsf is further supported by results from oedometer and dissipation tests. Subseafloor pockmarks and indications of free gas in seismic reflection profiles reveal four main overpressure sources (SI-SIV) with overpressure ratios &gt; 0.3 at subseafloor depths coinciding with levels where...
Tipo: Text
Palavras-chave: Gulf of Lion; Continental slope; Overpressure; Preconsolidation pressure; Stress history.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6649.pdf

In situ estimates of submesoscale horizontal eddy diffusivity across an ocean front
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nencioli, Francesco; D'Ovidio, Francesco; Doglioli, Andrea; Petrenko, Anne.
In the last decade, the rapid advancements in computational power have favored the development of high-resolution numerical models capable of directly resolving small-scale structures such as fronts and filaments. Such models have greatly improved our understanding of submesoscale dynamics. At the same time, the small dimensions and short duration of these structures still pose major challenges for small-scale dedicated field experiments. For this reason, submesoscale studies from in situ observations are still relatively scarce and quantitative estimates of key physical parameters for high-resolution numerical models, such as horizontal eddy diffusivity, are still lacking. This study presents a novel approach for computing in situ horizontal eddy...
Tipo: Text
Palavras-chave: Submesoscale front; Horizontal eddy diffusivity; Gulf of Lion.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00185/29654/28032.pdf

A walk down the Cap de Creus canyon, Northwestern Mediterranean Sea: Recent processes inferred from morphology and sediment bedforms
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lastras, G; Canals, M; Urgeles, R; Amblas, D; Ivanov, M; Droz, Laurence; Dennielou, Bernard; Fabres, J; Schoolmeester, T; Akhmetzhanov, A; Orange, D; Garcia Garcia, A.
The Cap de Creus canyon, northwestern Mediterranean Sea, belongs to a complex network of submarine canyons cutting the western Gulf of Lion continental shelf and opening into the larger Sete canyon. Swath bathymetry data, MAKAM deep-towed side-scan sonar imagery and 5 kHz high resolution seismic reflection profiles show striking morphologies in the Cap de Creus canyon floor and walls. As a consequence of the canyon head and the upper reach severe incision, the continental shelf dramatically narrows in front of the Creus Cape promontory. The upper canyon has a flat-bottomed thalweg incised in a megascale sediment furrow field displaying hyperbolic seismic facies. The tens of kilometres long linear furrows extend also over the middle canyon down to 1400 in...
Tipo: Text
Palavras-chave: Gulf of Lion; Bedform; Swath bathymetry; Side scan sonar; Submarine canyon.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3602.pdf

Impact of an intrusion by the Northern Current on the biogeochemistry in the eastern Gulf of Lion, NW Mediterranean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ross, Oliver N.; Fraysse, Marion; Pinazo, Christel; Pairaud, Ivane.
We present the results from the RHOMA2011-LEG2 campaign that took place in the eastern Gulf of Lion from 7 to 17 Oct 2011 and combine them with remote sensing observations and results from a 3D coupled hydrodynamic-biogeochemical model to study an intrusion event of the Northern Current (NC) onto the continental shelf in the Gulf of Lion (NW Mediterranean). Our analysis shows that during the intrusion, the previously upwelled nutrient-rich water present on the shelf is replaced by warmer and mostly oligotrophic NC water within a matter of 2–3 days. This has a marked impact on the local biogeochemistry in the Gulf with pre-intrusion Chl-a concentrations in the surface layer of over 0.5 mg m−3 dropping to near the detection limit within less than 72 h. The...
Tipo: Text
Palavras-chave: Northern Current; Gulf of Lion; Intrusion; Continental shelf; Biogeochemical modelling; Regime shift.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00302/41359/40644.pdf

Occurrence of microplastics in surface waters of the Gulf of Lion (NW Mediterranean Sea)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Schmidt, Natascha; Thibault, Delphine; Galgani, Francois; Paluselli, Andrea; Sempere, Richard.
Between 2014 and 2016 a total of 43 microplastic samples were collected at six sampling stations in the eastern section of the Gulf of Lion (located in the northwestern Mediterranean Sea), as well as upstream of the Rhône River. Microplastics were found in every sample with highly variable concentrations and masses. Concentrations ranged from 6 · 103 items km−2 to 1 · 106 items km−2 (with an average of 112 · 103 items km−2), and mass ranged from 0.30 g km−2 to 1018 g km−2 DW (mean 61.92 ± 178.03 g km−2). The samples with the highest and lowest microplastic count originate both from the Bay of Marseille. For the Bay of Marseille, it is estimated that the total microplastic load consist of 519 · 103 –101 · 106 items weighing 0.07–118 kg. Estimations for...
Tipo: Text
Palavras-chave: Marine litter; Microplastic; Mediterranean Sea; Gulf of Lion; Marseille Bay.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00411/52202/53357.pdf

Post-rift evolution of the Gulf of Lion margin tested by stratigraphic modelling
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

Un modèle géométrique et stratigraphique des séquences de dépôts quaternaires sur la marge du golfe du lion : enregistrement des cycles climatiques de 100 000 ans
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rabineau, Marina.
The up to 70 km wide continental shelf of the Golfe du Lion has been the object of numerous investigationss since the early days of Oceanography. Yet several key questions have remained unanswered and are still controversial. Among these questions are: What are the relationships between sedimentary sequences, Quaternary glacioeustatic cycles and tectonics? What is the sequence duration? What are the mechanisms of deposition? A study of the Very High Resolution (VHR) seismic reflection (Sparker) data collected by Ifremer between 1992 and 1998 on the outer shelf and upper slope offshore of Sète in the Languedoc region gives a new insight into these issues. The surveyed area covers 40 x 40 km with a line spacing of 400-1000 m. Useful depth of penetration is...
Tipo: Text
Palavras-chave: Stratigraphic modelling; Cores; High resolution seismic data; Glacioeustatism; Climatic cycles; Sequences; Gulf of Lion; Western Mediterranean; Simulation stratigraphique; Carottes; Sismique haute résolution; Stratigraphie Séquentielle; Glacioeustatisme; Cycles climatiques; Séquences sédimentaires; Méditerranée occidentale; Golfe du Lion.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/these-331.pdf

Research activities in the Gulf of Lion (NW Mediterranean) within the 1997-2001 PNEC project
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Raimbault, Patrick; Durrieu De Madron, Xavier.
The French national program on the coastal environment Programme National Environnement Cotier (PNEC) represented during the last decade a major support for the pluridisciplinary oceanographic research in the Gulf of Lion. During the second phase of the program, that lasted from 1997 to 2001, the main objective for this worksite was to establish an annual budget of carbon and associated biogenic elements to characterise the role of this region as source and the sink of elements. This introductory paper provides an over-view of the research framework and recapitulates the major scientific outcomes.
Tipo: Text
Palavras-chave: Environment côtier; Golfe du Lion; Pluridisciplinaire; Bilan; Coastal environment; Gulf of Lion; Pluridisciplinary; Budget.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00301/41208/40376.pdf

Quaternary turbidite systems on the northern margins of the Balearic Basin (Western Mediterranean): a synthesis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Droz, Laurence; Dos Reis, A. T.; Rabineau, Marina; Berne, Serge; Bellaiche, G.
The Balearic Basin is a young basin composed of thick Plio-Quaternary sediments, including active gravity sedimentation. During the Quaternary, gravity processes deposited (1) turbidite systems, either as symmetrical fans (Petit-Rhone and Valencia fans) or asymmetrical ridges (Marseille-Planier, Grand- Rhone and Pyreneo-Languedocian ridges) and (2) several mass-transport deposits, indicating recurrent sedimentary failures of the margin. This paper synthesizes previous works and proposes a chronological sedimentary evolution for the basin. Except for the last 20 ka, the chronostratigraphy remains poorly constrained but should soon be established for the last 500 ka, based on the PROMESS1 drillings on the outer shelf of the Gulf of Lions, and hopefully for...
Tipo: Text
Palavras-chave: Gulf of Lion; Quaternary evolution; Turbidity; Sedimentary system.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2171.pdf

Relationship between sedimentary organic matter and benthic fauna within the Gulf of Lion: synthesis on the identification of new biochemical descriptors of sedimentary organic nutritional value
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gremare, A; Medernach, L; Debovee, F; Amouroux, Jm; Charles, F; Dinet, A; Vetion, G; Albert, P; Colomines, Jc.
The abilities of several biochemical characteristics of sedimentary organic matter to describe quantitative changes in benthic fauna were assessed based on several surveys carried out within the Gulf of Lion during the last decade. Two sets of high frequency samplings were carried out both inshore and offshore, together with an assessment of seasonal variability along a depth gradient, and a synoptic assessment of mesoscale spatial variability. The considered biochemical parameters were: total organic matter, organic carbon, nitrogen, total proteins, available proteins, carbohydrates, lipids, total and available amino acids. The considered faunal parameters were the abundance and the biomass of both meio- and macrofauna. Our results contribute to unravel...
Tipo: Text
Palavras-chave: Matière organique sédimentée; Benthos; Golfe du Lion; Acides aminés; Biodisponibilité; Sedimentary organics; Benthos; Gulf of Lion; Amino acids; Bioavailability.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00321/43264/42995.pdf

Modélisation bioénergétique de la variabilité des traits d’histoire de vie de l’anchois et de la sardine entre le golfe du Lion, le golfe de Gascogne et la Manche
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Menu, Clara.
Small pelagic fish show a general decrease in size and body condition over the past two decades in the North-East Atlantic. The underlying factors are still not well understood, however recent studies point to a bottom-up control. In order to understand how the environment impacts the main biological functions, i.e. growth, reproduction and maintenance, we adopted a bioenergetic modelling framework based on the Dynamic Energy Budget theory. To improve the robustness of our study, we chose a comparative approach between two species, Engraulis encrasicolus and Sardina pilchardus, both living in three areas, namely the English Channel, the Bay of Biscay and the Gulf of Lion. Our model is calibrated over the Bay of Biscay and then applied to the other areas,...
Tipo: Text
Palavras-chave: Engraulis encrasicolus; Sardina pilchardus; Théorie Dynamic Energy Budget; Traits d'histoire de vie; Manche; Golfe de Gascogne; Golfe du Lion; Engraulis encrasicolus; Sardina pilchardus; Dynamic Energy Budget theory; Life history traits; English Channel; Bay of Biscay; Gulf of Lion.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00667/77900/80092.pdf