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Registros recuperados: 9
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Deep-water dunes on drowned isolated carbonate terraces (Mozambique Channel, south-west Indian Ocean) ArchiMer
Miramontes, Elda; Jorry, Stephan; Jouet, Gwenael; Counts, John; Courgeon, Simon; Roy, Philippe; Guerin, Charline; Hernández-molina, F. Javier.
Subaqueous sand dunes are common bedforms on continental shelves dominated by tidal and geostrophic currents. However, much less is known about sand dunes in deep‐marine settings that are affected by strong bottom currents. In this study, dune fields were identified on drowned isolated carbonate platforms in the Mozambique Channel (south‐west Indian Ocean). The acquired data include multibeam bathymetry, multi‐channel high‐resolution seismic reflection data, sea floor imagery, a sediment sample and current measurements from a moored current meter and hull‐mounted acoustic Doppler current profiler. The dunes are located at water depths ranging from 200 to 600 m on the slope terraces of a modern atoll (Bassas da India Atoll) and within small depressions...
Tipo: Text Palavras-chave: Bedform; Bottom currents; Contourite; Deep-marine environment; Eddy; Geostrophic current; Oceanic circulation.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00472/58418/60989.pdf
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Etude morpho-sédimentaire du plateau rocheux de la Méloine (Finistère nord). Méthodologie appliquée aux traitements des données et résultats sur la distribution des roches dans l’archipel ArchiMer
Ehrhold, Axel; Gautier, Emeric; Roubi, Angelique; Guerin, Charline; Gaillot, Arnaud; Gaffet, Jean-dominique; Caisey, Xavier.
Etude morpho-sédimentaire du plateau rocheux de la Méloine (Finistère nord) Méthodologie appliquée aux traitements des données et résultats sur la distribution des roches dans l’archipel.
Tipo: Text
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00280/39111/37664.pdf
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Etude morpho-sédimentaire du plateau rocheux de la Méloine (Finistère nord). Recueil des données acoustiques, sédimentaires et d’observations acquises pendant les missions GEOMELOINE et NEOMELEC’H en 2014 ArchiMer
Ehrhold, Axel; Gautier, Emeric; Roubi, Angelique; Guerin, Charline; Gaillot, Arnaud; Gaffet, Jean-dominique; Caisey, Xavier.
Etude morpho-sédimentaire du plateau rocheux de la Méloine (Finistère nord). Recueil des données acoustiques, sédimentaires et d’observations acquises pendant les missions GEOMELOINE et NEOMELEC’H en 2014
Tipo: Text
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00280/39109/37662.pdf
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Forêts de laminaires à Molène : approches multi-échelles des fonds rocheux de l’archipel ArchiMer
Ehrhold, Axel; Bajjouk, Touria; Cordier, Celine; Le Nilliot, Philippe; Hamdi, Anouar; Drussel, Benjamin; Guerin, Charline; Le Gall, Bernard; Populus, Jacques.
Tipo: Text Palavras-chave: Habitat; Laminaires; Systèmes acoustiques; Lidar; Géomorphologie; MNT.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00281/39230/37790.pdf
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Impact of tectonic and volcanism on the Neogene evolution of isolated carbonate platforms (SW Indian Ocean) ArchiMer
Courgeon, Simon; Jorry, Stephan; Jouet, Gwenael; Camoin, G.; Boudagher-fadel, M. K.; Bachelery, P.; Caline, B.; Boichard, R.; Revillon, Sidonie; Thomas, Yannick; Thereau, Estelle; Guerin, Charline.
Understanding the impact of tectonic activity and volcanism on long-term (i.e. millions years) evolution of shallow-water carbonate platforms represents a major issue for both industrial and academic perspectives. The southern central Mozambique Channel is characterized by a 100 km-long volcanic ridge hosting two guyots (the Hall and Jaguar banks) and a modern atoll (Bassas da India) fringed by a large terrace. Dredge sampling, geophysical acquisitions and submarines videos carried out during recent oceanographic cruises revealed that submarine flat-top seamounts correspond to karstified and drowned shallow-water carbonate platforms largely covered by volcanic material and structured by a dense network of normal faults. Microfacies and well-constrained...
Tipo: Text Palavras-chave: Carbonate platform; Drowning; Volcanism; Tectonic; Mozambique Channel.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00384/49554/50048.pdf
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Late Pleistocene evolution of the mixed siliciclastic and carbonate southwestern New Caledonia continental shelf/lagoon ArchiMer
Le Roy, Pascal; Jorry, Stephan; Jouet, Gwenael; Ehrhold, Axel; Michel, Guillaume; Gautier, Valentin; Guerin, Charline.
The main island of New Caledonia (NC) is surrounded by the second largest barrier reef in the world after the Australian Great Barrier Reef. The Upper Pleistocene evolution of this barrier reef–lagoon complex offers the opportunity to examine the response of a modern mixed tropical siliciclastic/carbonate system to relative sea-level changes and to better constrain the relative role of lagoon backfilling and paleo-drainage system in sediment transfer across the shelf. This paper mainly focuses on the results of chronostratigraphic and sedimentological interpretations of new seismic, bathymetric and coring data collected in the SW NC lagoon. Several significant points are highlighted from this study and allow the construction of a refined model which...
Tipo: Text Palavras-chave: Seismic stratigraphy; Quaternary; Incised valleys.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00461/57289/59362.pdf
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Protective Effect of a Non-Bacteriocinogenic Lactococcus piscium CNCM I-4031 Strain Against Listeria monocytogenes in Sterilized Tropical Cooked Peeled Shrimp ArchiMer
Fall, Papa-abdoulaye; Leroi, Francoise; Chevalier, Frederique; Guerin, Charline; Pilet, Marie-france.
The protective activity of a non-bacteriocinogenic Lactococcus piscium CNCM I-4031 strain against Listeria monocytogenes was investigated in tropical cooked peeled shrimp stored at 8°C in modified atmosphere packaging (50% N2-50% CO2). When inoculated alone (L. piscium 107 CFU g-1 and L. monocytogenes 104 CFU g-1), protective culture and target strain grew very well on shrimp reaching a maximum cell number of 109 CFU g-1 after 7 and 14 days, respectively. In the presence of L. piscium, growth of L. monocytogenes was totally prevented after 3 days of storage. The count was 3.4 log CFU g-1 lower than in the control after 10 days and until the end of storage (31 days). Using the Seafood Spoilage and Safety Predictor Software (http://sssp.dtuaqua.dk), it was...
Tipo: Text Palavras-chave: Inhibition; Biopreservation; Challenge-test; Lactic acid; Nutritional competition.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00005/11624/8281.pdf
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The Aquitaine Shelf edge (Bay of Biscay): a primary outlet for microbial methane release ArchiMer
Dupré, Stephanie; Loubrieu, Benoit; Pierre, C.; Scalabrin, Carla; Guerin, Charline; Ehrhold, Axel; Ogor, Andre; Gautier, Emeric; Ruffine, Livio; Biville, Romain; Saout, Johan; Breton, C; Floodpage, J.; Lescanne, M..
A few thousand (2612) seeps are releasing microbial methane bubbles from the seafloor at the Aquitaine Shelf edge (Bay of Biscay) at shallow water depths (140‐220 m). This methane contributes to the formation of meter‐scale subcircular carbonate structures, which are (sub‐)outcropping over 375 km2. Based on in situ flow rate measurements and acoustic data, and assuming steady and continuous fluxes over time, the methane entering the water column is estimated to 144 Mg/yr. Microbial methane circulation has been on‐going for at least a few thousand years. This discovery highlights the importance of microbial methane generation, disconnected from deep thermogenic sources and gas hydrates, at continental shelves. The shelf edge may be viewed as a focus area...
Tipo: Text Palavras-chave: Microbial methane; Continental shelf; Fluid emissions; High‐resolution acoustics; Aquitaine Margin; Methane‐derived authigenic carbonates.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00618/72982/72057.pdf
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Upslope migrating sand dunes in the upper slope of the Mozambican margin (SW Indian Ocean) ArchiMer
Miramontes Garcia, Elda; Jouet, Gwenael; Cattaneo, Antonio; Thereau, Estelle; Guerin, Charline; Jorry, Stephan; Droz, Laurence.
The upper slopes of continental margins are very energetic areas where nepheloid layers are often observed. Multibeam bathymetry, sub-bottom profiler and multi-channel highresolution seismic reflection data acquired during the PAMELA-MOZ04 survey in the Mozambique Channel revealed the presence of sand dunes on the upper slope at 120-250 m water depth. The dunes migrate upslope and their crests are oblique to the contours. They are medium to large dunes, with wavelengths between 20 and 150 m and heights between 0.15 and 1.50 m, and their size decreases upslope. Seismic reflection data of the water column show internal solitary waves travelling offshore in the depth range of the dune field. The formation of the dune field could be related to the interaction...
Tipo: Text
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00499/61049/64460.pdf
Registros recuperados: 9
Primeira ... 1 ... Última
 

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