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Registros recuperados: 14
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A seismic refraction survey in the Kerguelen isles, southern Indian Ocean IRD
Recq, M.; Charvis, Philippe.
Tipo: Text Palavras-chave: GEOPHYSIQUE; SISMOLOGIE; SISMIQUE A REFRACTION; ONDE SISMIQUE; PROPAGATION D'ONDE; GRAVIMETRIE; CARTOGRAPHIE.
Ano: 1986 URL: http://www.documentation.ird.fr/hor/fdi:43445
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Deep structure of the continental margin and basin off Greater Kabylia, Algeria – New insights from wide-angle seismic data modeling and multichannel seismic interpretation ArchiMer
Aidi, Chafik; Beslier, Marie-odile; Yelles-chaouche, Abdel Karim; Klingelhoefer, Frauke; Bracene, Rabah; Galve, Audrey; Bounif, Abdallah; Schenini, Laure; Hamai, Lamine; Schnurle, Philippe; Djellit, Hamou; Sage, Francoise; Charvis, Philippe; Deverchere, Jacques.
During the Algerian-French SPIRAL survey aimed at investigating the deep structure of the Algerian margin and basin, two coincident wide-angle and reflection seismic profiles were acquired in central Algeria, offshore Greater Kabylia, together with gravimetric, bathymetric and magnetic data. This ~260 km-long offshore-onshore profile spans the Balearic basin, the central Algerian margin and the Greater Kabylia block up to the southward limit of the internal zones onshore. Results are obtained from modeling and interpretation of the combined data sets. The Algerian basin offshore Greater Kabylia is floored by a thin oceanic crust (~4 km) with P-wave velocities ranging between 5.2 and 6.8 km/s. In the northern Hannibal High region, the atypical 3-layer...
Tipo: Text Palavras-chave: Mediterranean Sea; Algerian margin; Crustal structure; Tectonic inversion; Post-accretion magmatism; Deep seismics.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00425/53677/54519.pdf
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Deep structure of the northern Kerguelen Plateau and hotspot-related activity IRD
Charvis, Philippe; Recq, M.; Operto, S.; Brefort, D..
Tipo: Text Palavras-chave: TECTONIQUE DE PLAQUES; GEOLOGIE STRUCTURALE; BATHYMETRIE; SISMIQUE A REFRACTION.
Ano: 1995 URL: http://www.documentation.ird.fr/hor/fdi:43135
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Dehydration of subducting slow-spread oceanic lithosphere in the Lesser Antilles ArchiMer
Paulatto, Michele; Laigle, Mireille; Galve, Audrey; Charvis, Philippe; Sapin, Martine; Bayrakci, Gaye; Evain, Mikael; Kopp, Heidrun.
Subducting slabs carry water into the mantle and are a major gateway in the global geochemical water cycle. Fluid transport and release can be constrained with seismological data. Here we use joint active-source/local-earthquake seismic tomography to derive unprecedented constraints on multi-stage fluid release from subducting slow-spread oceanic lithosphere. We image the low P-wave velocity crustal layer on the slab top and show that it disappears beneath 60–100 km depth, marking the depth of dehydration metamorphism and eclogitization. Clustering of seismicity at 120–160 km depth suggests that the slab’s mantle dehydrates beneath the volcanic arc, and may be the main source of fluids triggering arc magma generation. Lateral variations in seismic...
Tipo: Text
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00392/50321/51004.pdf
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Etude d'un essaim de séismes dans le Sud du Vanuatu (SO-Pacifique) par un réseau de stations sismologiques sous-marines (OBS) IRD
Louat, Rémy; Frohlich, C.; Charvis, Philippe; Hello, Yann; Mac Phérson, P.; Nakamura, Y.; Pontoise, Bernard.
Tipo: Text Palavras-chave: SEISME; SISMOLOGIE; ESSAIM; ARC INSULAIRE; SUBDUCTION; TECTONIQUE; FAILLE.
Ano: 1989 URL: http://www.documentation.ird.fr/hor/fdi:26967
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Geophysical evidence for a transform margin offshore Western Algeria: a witness of a subduction-transform edge propagator? ArchiMer
Badji, Rabia; Charvis, Philippe; Bracene, Rabah; Galve, Audrey; Badsi, Madjid; Ribodetti, Alessandra; Benaissa, Zahia; Klingelhoefer, Frauke; Medaouri, Mourad; Beslier, Marie-odile.
For the first time, a deep seismic data set acquired in the frame of the Algerian-French SPIRAL program provides new insights regarding the origin of the westernmost Algerian margin and basin. We performed a tomographic inversion of traveltimes along a 100-km-long wide-angle seismic profile shot over 40 ocean bottom seismometers offshore Mostaganem (Northwestern Algeria). The resulting velocity model and multichannel seismic reflection profiles show a thin (3-4 km thick) oceanic crust. The narrow ocean-continent transition (less than 10 km wide) is bounded by vertical faults and surmounted by a narrow almost continuous basin filled with Miocene to Quaternary sediments. This fault system, as well as the faults organized in a negative-flower structure on the...
Tipo: Text Palavras-chave: Seismic tomography; Continental margins: transform; Crustal structure; Africa; Europe..
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00255/36670/35278.pdf
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Kerguelen plateau : a volcanic passive margin fragment ? IRD
Operto, S.; Charvis, Philippe.
Tipo: Text Palavras-chave: TECTONIQUE DE PLAQUES; GEOLOGIE STRUCTURALE; CROUTE CONTINENTALE; SISMOLOGIE; VOLCANISME.
Ano: 1995 URL: http://www.documentation.ird.fr/hor/fdi:42472
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La ride asismique de Kerguelen - Heard : anomalie du géoïde et compensation isostatique IRD
Recq, M.; Charvis, Philippe.
Tipo: Text Palavras-chave: TECTONIQUE DE PLAQUES; GRAVIMETRIE; ANOMALIE DE BOUGUER; GEOIDE; SISMIQUE A REFRACTION; GEOLOGIE STRUCTURALE; EXTENSION TECTONIQUE; ISOSTASIE.
Ano: 1987 URL: http://www.documentation.ird.fr/hor/fdi:43425
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Les stations sismiques sous-marines IRD
Charvis, Philippe; Hello, Yann.
Tipo: Text Palavras-chave: TECTONIQUE DE PLAQUES; APPAREIL DE MESURE; SISMOLOGIE; SURVEILLANCE; PROFIL SISMIQUE; PROPAGATION D'ONDE; SISMIQUE A REFRACTION.
Ano: 1987 URL: http://www.documentation.ird.fr/hor/fdi:010026408
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Structure, âge et origine des fossés arrière-arc des Nouvelles-Hébrides (Sud-Ouest Pacifique) IRD
Récy, Jacques; Pelletier, Bernard; Charvis, Philippe; Gérard, Martine; Monjaret, Marie-Claire; Maillet, Patrick.
Cet article présente une synthèse des résultats concernant la géophysique, la géologie structurale, la stratigraphie, la pétrographie, la géochronologie et la micropaléontologie, obtenus sur les fossés arrière-arc des Nouvelles-Hébrides dans le cadre de la campagne Seapso 2 et des campagnes complémentaires Multipso, Eva 13 et Eva 14. Trois domaines de l'arc sont étudiés: le domaine central, où n'apparaît aucun indice d'extension, la partie Sud, caractérisée par les fossés du Coriolis, et la partie Nord, où sont développés les fossés du Nord
Tipo: Text Palavras-chave: ARC VOLCANIQUE; SUBDUCTION; TECTONIQUE DE PLAQUES; PROFIL SISMIQUE; BATHYMETRIE; EXTENSION TECTONIQUE; HORST; GRABEN; FOSSE ARRIERE ARC; BASSIN MARGINAL.
Ano: 1990 URL: http://www.documentation.ird.fr/hor/fdi:31935
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Structure profonde de la transition arc insulaire-bassin marginal dans le Nord des Nouvelles-Hébrides (Vanuatu, Pacifique sud-ouest) IRD
Sage, F.; Charvis, Philippe.
Tipo: Text Palavras-chave: PROFIL SISMIQUE; SISMIQUE A REFRACTION; GEOLOGIE STRUCTURALE; CROUTE OCEANIQUE; TECTONIQUE DE PLAQUES; ARC INSULAIRE; BASSIN MARGINAL.
Ano: 1991 URL: http://www.documentation.ird.fr/hor/fdi:34836
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Tectonique et volcanisme sous-marin à l'arrière de l'arc des Nouvelles-Hébrides (Vanuatu, Pacifique sud-ouest) : résultats préliminaires de la campagne SEAPSO Leg II du N/O Jean-Charcot IRD
Récy, Jacques; Charvis, Philippe; Ruellan, E.; Monjaret, Marie-Claire; Gérard, Martine; Auclair, G.; Baldassari, Catherine; Boirat, J.M.; Brown, G.R.; Butscher, John; Collot, Jean-Yves; Daniel, Jacques; Louat, Rémy; Monzier, Michel; Pontoise, Bernard.
L'arrière-arc des Nouvelles-Hébrides est caractérisé par deux régions structurées en horsts et grabens, au nord et au sud, encadrant une zone centrale clairement affectée par des compressions. Dans le nord, les grabens peu marqués dans la morphologie sont associés à d'importantes manifestations volcaniques récentes et actuelles. Localement, des dépôts manganèsifères témoignent d'une activité hydrothermale récente. Dans les fossés du Coriolis, les laves draguées sont de nature différente de celles des fossés nord ; en particulier, des basaltes ankaramitiques frais ont été recueillis au fond du fossé de Futuna. Ces structures et, plus spécialement, le fossé de Futuna au sud et le fossé de Vot Tande au nord, se sont mis en place sous l'effet d'une extension...
Tipo: Text Palavras-chave: MORPHOLOGIE; FOND MARIN; DRAGAGE; LAVE; VOLCANISME; ARC INSULAIRE; EXTENSION TECTONIQUE; CONVERGENCE; STRUCTURE; FOSSE OCEANIQUE; HYDROTHERMALISME; DEFORMATION.
Ano: 1986 URL: http://www.documentation.ird.fr/hor/fdi:24216
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The 2010 Haiti earthquake: A complex fault pattern constrained by seismologic and tectonic observations ArchiMer
De Lepinay, Bernard Mercier; Deschamps, Anne; Klingelhoefer, Frauke; Mazabraud, Yves; Delouis, Bertrand; Clouard, Valerie; Hello, Yann; Crozon, Jacques; Marcaillou, Boris; Graindorge, David; Vallee, Martin; Perrot, Julie; Bouin, Marie-paule; Saurel, Jean-marie; Charvis, Philippe; St-louis, Mildor.
After the January 12, 2010, Haiti earthquake, we deployed a mainly offshore temporary network of seismologic stations around the damaged area. The distribution of the recorded aftershocks, together with morphotectonic observations and mainshock analysis, allow us to constrain a complex fault pattern in the area. Almost all of the aftershocks have a N-S compressive mechanism, and not the expected left-lateral strike-slip mechanism. A first-order slip model of the mainshock shows a N264 degrees E north-dipping plane, with a major left-lateral component and a strong reverse component. As the aftershock distribution is sub-parallel and close to the Enriquillo fault, we assume that although the cause of the catastrophe was not a rupture along the Enriquillo...
Tipo: Text
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00054/16557/14071.pdf
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The northern New Hebrides back-arc troughs : history and relation with the North Fiji basin IRD
Charvis, Philippe; Pelletier, Bernard.
Tipo: Text Palavras-chave: TECTONIQUE DE PLAQUES; STRUCTURE; BATHYMETRIE; RELIEF SOUS MARIN; MAGNETISME; ARC INSULAIRE; FOSSE OCEANIQUE.
Ano: 1989 URL: http://www.documentation.ird.fr/hor/fdi:010017480
Registros recuperados: 14
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