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Registros recuperados: 46
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Active oceanic spreading in the northern north Fiji basin : results of the NOFI cruise of R/V l'Atalante (Newstarmer project) IRD
Lagabrielle, Y.; Ruellan, E.; Tanahashi, M.; Bourgois, J.; Buffet, G.; Alteriis, G. de; Dyment, J.; Goslin, J.; Gracia-Mont, E.; Iwabushi, Y.; Jarvis, P.; Joshima, M.; Karpoff, A.M.; Matsumoto, T.; Ondréas, H.; Pelletier, Bernard; Sardou, O..
The South Pandora and the Tripartite Ridges are active spreading centers located in the northern part of the North Fiji Basin. These spreading centers were surveyed over a distance of 750 km during the NOFI cruise of R/V L'Atalante (August-September 1994) which was conducted in the frame of the french-japanese Newstarmer cooperation project. SIMRAD EM12-dual full coverage swath bathymetric and imagery data as well as airgun 6-channel seismic, magnetics and gravity profiles were recorded along an off-axis from 170°40'E to 178°E. Dredging and piston coring were also performed along and off-axis. The axial domain of the South Pandora Ridge is divided into 5 first-order segments characterized by contrasted morphologies. The average width of the active domain...
Tipo: Text Palavras-chave: TECTONIQUE DE PLAQUES; EXTENSION TECTONIQUE; GEOLOGIE STRUCTURALE; BATHYMETRIE; MAGNETISME; GRAVIMETRIE; GEODYNAMIQUE.
Ano: 1996 URL: http://www.documentation.ird.fr/hor/fdi:010009462
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Campagne Boisalis 1 : cartographie multifaisceaux et dragages des pentes du récif barrière Est (Poindimié) et Sud-Est (Goro) de Nouvelle-Calédonie : transport et débarquement du matériel de forage sur l'îlot Bayes IRD
Cabioch, Guy; Pelletier, Bernard; Boré, Jean-Michel; Panché, Jean-Yves; Perrier, Julien.
Tipo: Text Palavras-chave: CAMPAGNE OCEANOGRAPHIQUE; RECIF BARRIERE; FORAGE; DRAGAGE; CARTOGRAPHIE; NIVEAU MARIN; SONDEUR MULTIFAISCEAUX.
Ano: 2002 URL: http://www.documentation.ird.fr/hor/fdi:010028533
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Campagne Boisalis 2 : cartographie multifaisceaux et dragages des pentes du récif barrière Sud-Est (Goro) et cartographie des passes de Mato et Boulari, Nouvelle-Calédonie IRD
Cabioch, Guy; Pelletier, Bernard; Perrier, Julien; Régnier, Marc; Varillon, David.
Tipo: Text Palavras-chave: CAMPAGNE OCEANOGRAPHIQUE; RECIF BARRIERE; FORAGE; DRAGAGE; CARTOGRAPHIE; NIVEAU MARIN; SONDEUR MULTIFAISCEAUX.
Ano: 2002 URL: http://www.documentation.ird.fr/hor/fdi:010028535
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Campagne PaléoPente : cartographie multifaisceaux et dragages des pentes du récif barrière Ouest et Nord de Nouvelle-Calédonie IRD
Cabioch, Guy; Pelletier, Bernard; Boré, Jean-Michel; Gallois, Francis; Garel, E.; Leroy, P..
Tipo: Text Palavras-chave: CAMPAGNE OCEANOGRAPHIQUE; RECIF BARRIERE; STRUCTURE SEDIMENTAIRE; CARTOGRAPHIE; FORAGE; DRAGAGE; SONDEUR MULTIFAISCEAUX.
Ano: 2002 URL: http://www.documentation.ird.fr/hor/fdi:010028531
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Cartographie au sondeur multi-faisceaux des pentes externes du récif barrière de la Province Nord de la Nouvelle-Calédonie : campagne province nord 1 côte est de la passe de Thio à la passe de Balade (24 juillet au 1er août 2002) IRD
Pelletier, Bernard; Butscher, John; Panché, Yves; Perrier, Julien; Maloune, A..
Tipo: Text Palavras-chave: RECIF BARRIERE; CARTOGRAPHIE; BATHYMETRIE; CARTE GEOLOGIQUE; SONDEUR MULTIFAISCEAUX.
Ano: 2002 URL: http://www.documentation.ird.fr/hor/fdi:010031529
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Compressive tectonism along the Eastern margin of Malaita Island (Solomon Islands) IRD
Auzende, Jean-Marie; Kroenke, L.; Collot, Jean-Yves; Lafoy, Y.; Pelletier, Bernard.
New bathymetric and geophysical data were collected in the region east of the island of Malaita during the SOPACMAPS II cruise of the French research vessel L'Atalante. This region, part of the Malaita Anticlinorium was interpreted as a piece of oceanic crust from the Ontong Java Plateau obducted over the old Solomon Islands arc during collision between the Pacific and Australian plates. It has been generally accepted that convergent motion between the Australia and Pacific plates since the Late Miocene was absorbed exclusively along the San Cristobal trench, southwest of the Solomon Islands Arc. Bathymetry, imagery, and geophysical data (magnetism, gravity, seismic) acquired during the SOPACMAPS II survey allow us to classify the successive parallel...
Tipo: Text Palavras-chave: GEOLOGIE STRUCTURALE; BATHYMETRIE; MAGNETISME; GRAVIMETRIE; SISMIQUE A REFLEXION; GEODYNAMIQUE; COMPRESSION TECTONIQUE.
Ano: 1996 URL: http://www.documentation.ird.fr/hor/fdi:010009464
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De la fosse de Kermadec à la terminaison sud du fossé d'Hikurangi : résultats de la campagne de cartographie multifaisceaux GEODYNZ-SUD, Leg 1 IRD
Collot, Jean-Yves; Delteil, J.; Lewis, K.; Audru, J.C.; Barnes, P.; Chanier, F.; Chaumillon, E.; Davy, B.; Lallemant, S.; Lamarche, Geoffroy; Mercier de Lépinay, B.; Orpin, A.; Pelletier, Bernard; Sosson, M.; Toussaint, Bertrand; Uruski, C..
Des données de cartographie EM12D et de géophysique récoltées pendant la campagne GEODYNZ-SUD Leg 1 sur la marge Kermadec-Hikurangi révèlent la tectogenèse associée au passage de la subduction intra-océanique oblique à la subduction sous-continentale très oblique, puis à la transgression intra-continentale. Le partitionnement des composantes décrochante et compressive de la déformation est suggéré dans l'ensemble de la zone étudiée, excepté à son extrémité méridionale. La distribution des structures distensives (au Nord) et compressives (au Sud) est associée à la manifestation probable du processus d'érosion tectonique au Nord et d'accrétion tectonique au Sud. (Résumé d'auteur)
Tipo: Text Palavras-chave: TECTONIQUE DE PLAQUES; SUBDUCTION; GEOLOGIE STRUCTURALE; BATHYMETRIE.
Ano: 1995 URL: http://www.documentation.ird.fr/hor/fdi:42490
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Déformation compressive d'un bassin intra-arc dans un contexte de collision ride/arc : le bassin d'Aoba, arc des Nouvelles-Hébrides IRD
Daniel, Jacques; Gérard, Martine; Mauffret, A.; Boulanger, D.; Cantin, B.; Collot, Jean-Yves; Durand, Jacques; Fisher, M.; Greene, H.G.; Michaux, P.; Pelletier, Bernard; Pezzimenti, A.; Renard, V.; Schaming, M.; Tissot, J.D..
Tipo: Text Palavras-chave: GEOLOGIE STRUCTURALE; COMPRESSION TECTONIQUE; SUBDUCTION; BATHYMETRIE; SISMIQUE A REFLEXION; DIRECTION STRUCTURALE.
Ano: 1989 URL: http://www.documentation.ird.fr/hor/fdi:26123
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Effets de la subduction de la ride de Louisville sur l'arc des Tonga-Kermadec IRD
Pelletier, Bernard; Dupont, Jacques.
Dans cet article, les caractéristiques morphologique et tectonique du système des Tonga-Kermadec sont reconsidérées afin de déterminer les effets possibles du passage de la ride de Louisville. Les résultats obtenus dans la zone d'interaction actuelle, lors de la campagne Seapso 5 du N/O Jean Charcot sont présentés afin de préciser les mécanismes tectoniques régissant la subduction de la ride. L'ensemble de ces données permet de proposer un schéma illustrant les effets de la subduction de la ride oblique de Louisville sur la marge des Tonga-Kermadec
Tipo: Text Palavras-chave: TECTONIQUE DE PLAQUES; SUBDUCTION; GEOLOGIE STRUCTURALE; MARGE CONTINENTALE ACTIVE; BATHYMETRIE; PROFIL SISMIQUE; MONT SOUSMARIN; EROSION TECTONIQUE.
Ano: 1990 URL: http://www.documentation.ird.fr/hor/fdi:31936
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Erosion, accrétion, extension arrière-arc et longueur du plan de subduction le long de la marge active des Kermadec, Pacifique Sud-Ouest IRD
Pelletier, Bernard; Dupont, Jacques.
Tipo: Text Palavras-chave: FOSSE OCEANIQUE; SUBDUCTION; MARGE CONTINENTALE ACTIVE; BATHYMETRIE; PROFIL SISMIQUE; ACCRETION; EROSION.
Ano: 1990 URL: http://www.documentation.ird.fr/hor/fdi:31901
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Extrémités nord du bassin Nord-Fidjien et des fossés arrière-arc des Nouvelles-Hébrides : morphostructure et signature magnétique IRD
Pelletier, Bernard; Missègue, François; Lafoy, Y.; Mollard, Lucien; Decourt, Roger; Dupont, Jacques; Join, Yvan; Perrier, Julien; Récy, Jacques.
Les données obtenues lors de la campagne Santa Cruz (novembre - décembre 1991, No Le Norois), couplées aux données antérieures, permettent de présenter des cartes bathymétrique, magnétique et structurale complètes des terminaisons nord du bassin Nord-Fidjien et des fossés arrière-arc des Nouvelles-Hébrides. Aucun arc volcanique ne borde au Sud la paléo-fosse du Vitiaz. Deux systèmes d'accrétion, orientés NW-SE puis E-W et reconnus respectivement jusqu'à 8°30'S et 9°S, sont à l'origine de la formation du coin N-W du bassin. La ride de Tikopia pourrait correspondre ou se surimposer à l'axe sub-E-W du second système d'ouverture. Plus au Nord, cet axe serait décalé par la ride West Tikopia et se situerait au niveau de la ride de 9°30'S. L'expression...
Tipo: Text Palavras-chave: TECTONIQUE DE PLAQUES; GEOLOGIE STRUCTURALE; BATHYMETRIE; ANOMALIE MAGNETIQUE; DISTRIBUTION SPATIALE.
Ano: 1993 URL: http://www.documentation.ird.fr/hor/fdi:43167
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Fragmentation de la plaque Nazca à l'Ouest de la fosse du Pérou : résultats de la campagne SEAPERC du N.O. Jean-Charcot, juillet 1986 IRD
Pautot, Guy; Bourgois, Jacques; Bandy, William; Pelletier, Bernard.
Tipo: Text Palavras-chave: SUBDUCTION; PLAQUE NAZCA; FRAGMENTATION; MENDANA ZONE FRACTURE.
Ano: 1986 URL: http://www.documentation.ird.fr/hor/fdi:23294
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From oblique subduction to intra-continental transpression : structures of the southern Kermadec-Hikurangi margin from multibeam bathymetry, side-scan sonar and seismic reflection IRD
Collot, Jean-Yves; Delteil, J.; Lewis, K.B.; Davy, B.; Lamarche, Geoffroy; Audru, J.C.; Barnes, P.; Charnier, F.; Chaumillon, E.; Lallemand, S.; Mercier de Lepinay, B.; Orpin, A.; Pelletier, Bernard; Sosson, M.; Toussaint, Bertrand; Uruski, C..
The southern Kermadec-Hikurangi convergent margin, east of New Zealand, accommodates the oblique subduction of the oceanic Hikurangi Plateau at rates of 4-5 cm/yr. Swath bathymetry and sidescan data, together with seismic reflection and geopotential data obtained during the GEODYNZ-SUD cruise, showed major changes in tectonic style along the margin. The changes reflect the size and abundance of seamounts on the subducting plateau, the presence and thickness of trench-fill turbidites, and the change to increasing obliquity and intracontinental transpression towards the south. In this paper, we provide evidence that faulting with a significant strike-slip component is widespread along the entire 1000 km margin. Subduction of the northeastern scarp or the...
Tipo: Text Palavras-chave: TECTONIQUE DE PLAQUES; SUBDUCTION; GEOLOGIE STRUCTURALE; BATHYMETRIE; SONAR; SISMIQUE A REFLEXION; GEODYNAMIQUE; FAILLE.
Ano: 1996 URL: http://www.documentation.ird.fr/hor/fdi:010009470
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Géodiversité sous-marine de la Nouvelle-Calédonie. 2ème partie ArchiMer
Collot, Julien; Patriat, Martin; Rouillard, Pierrick; Samadi, Sarah; Gardes, Lionel; Pelletier, Bernard; Loubersac, Lionel.
This article of the number 10 of Tai Kona is the natural complement to the article appeared under the number 8, dedicated to the submarine geodiversity of the New Caledonian EEZ. The first article notably put the bases of knowledge on the history, the origins and the specificities of the geodiversity of the maritime spaces of the New Caledonian EEZ. The present article focuses on four of the major stakes which are put: 1/ the scientific ones relative to an exceptional submarine geologic context, 2 /the economic ones connected to such a favorable geologic context and to mineral resources exploitation perspectives which are no more domain of the utopia, 3/ the major environmental ones with the existence of a semi deep and deep major biodiversity and 4/ the...
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Ano: 2014 URL: http://archimer.ifremer.fr/doc/00209/32013/30443.pdf
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Géodiversité sous-marine de Nouvelle-Calédonie. 1ère partie ArchiMer
Collot, Julien; Patriat, Martin; Rouillard, Pierrick; Pelletier, Bernard; Loubersac, Lionel.
The object of this article is to offer a synthesis of the knowledge clarifying the originality and the diversity of the submarine geological formations of the New Caledonian EEZ. A reminder is given onto the geologic history of the region, based upon the dislocation of the Gondwana Continent, the opening of the Tasman Sea, the presence of submarine volcanism, the setting up of heavy peridotitic rocks, the building up of the Fairway and Lord Howe Ridges and of sedimentary basins, the formation of volcanic domes and sea-mounts or guyots, the subduction along the Vanuatu Trench, the uplift of the Loyalty Islands, the development of carbonated ptatforms around the islands etc.... Of this complex history ensues an exceptional submarine geo-diversity. After this...
Tipo: Text
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00194/30574/29098.pdf
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Géologie, géochimie et évolution géodynamique du bassin Nord Fidjien IRD
Auzende, Jean-Marie; Pelletier, Bernard; Eissen, Jean-Philippe.
Tipo: Text Palavras-chave: TECTONIQUE DE PLAQUES; ACCRETION; GEOLOGIE STRUCTURALE.
Ano: 1993 URL: http://www.documentation.ird.fr/hor/fdi:40547
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Geology of the d'Entrecasteaux - New Hebrides arc collision zone : results from a deep submersible survey IRD
Collot, Jean-Yves; Lallemand, S.; Pelletier, Bernard; Eissen, Jean-Philippe; Glaçon, G.; Fisher, M.A.; Greene, H.G.; Boulin, J.; Daniel, Jacques; Monzier, Michel.
Tipo: Text Palavras-chave: TECTONIQUE DE PLAQUES; GEOLOGIE STRUCTURALE; LITHOLOGIE; STRATIGRAPHIE.
Ano: 1992 URL: http://www.documentation.ird.fr/hor/fdi:43396
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Geometry and structure of the Vitiaz trench lineament (SW Pacific) IRD
Pelletier, Bernard; Auzende, Jean-Marie.
Swath bathymetric, sonar imagery and seismic reflection data dollected during thee SOPACMAPS cruise Leg 3 over segments of the Vitiaz Trench Lineament and adjacent areas provide new insights on the geometry and the structural evolution of this seismically inactive lineament. The Vitiaz Trench Lineament, although largely unknown, is one of the most important tectonic feature in the SW Pacific because it separates the Cretaceous crust of the Pacific Plate to the north from the Cenozoic lithosphere of the North Fiji and Lau Basins to the south. The lineament is considered to be the convergent plate boundary between the Pacific and Australian Plates during middle to late Tertiary time when the Vitiaz Arc was a continuous east-facing arc from the Tonga to the...
Tipo: Text Palavras-chave: TECTONIQUE DE PLAQUES; SUBDUCTION; CROUTE OCEANIQUE; GEOLOGIE STRUCTURALE; TECTONIQUE; VOLCANISME; BATHYMETRIE; SISMIQUE A REFLEXION; GEODYNAMIQUE.
Ano: 1996 URL: http://www.documentation.ird.fr/hor/fdi:010009466
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Impact of oceanic asperities on the tectogenesis of modern convergent margins IRD
Lallemand, S.; Collot, Jean-Yves; Pelletier, Bernard; Rangin, C.; Cadet, J.P..
A partir des données géophysiques récoltées lors du tour du monde du N/O Jean Charcot, cet article présente une première synthèse des effets produits par la subduction d'aspérités sur la structuration des marges convergentes. Les exemples de zones de subduction étudiées sur le pourtour de l'Océan Pacifique (Japon, Philippines, Nouvelles-Hébrides, Tonga-Kermadec et Amérique Centrale) ont permis de reconnaître quatre types d'effets: impact morphologique, érosion tectonique, déformation interne de la marge et accrétion subcrustale
Tipo: Text Palavras-chave: SUBDUCTION; MARGE CONTINENTALE ACTIVE; TECTONIQUE DE PLAQUES; ACCRETION; GEOLOGIE STRUCTURALE; EROSION TECTONIQUE; MONT SOUSMARIN.
Ano: 1990 URL: http://www.documentation.ird.fr/hor/fdi:31929
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Instabilités des terminaisons des zones de subduction et créations de "terranes" dans le Sud-Ouest Pacifique (Tonga et Nouvelles-Hébrides) IRD
Dupont, Jacques; Monzier, Michel; Grzesczyk, Alain; Louat, Rémy; Maillet, Patrick; Pelletier, Bernard.
Tipo: Text Palavras-chave: TECTONIQUE DE PLAQUES; SUBDUCTION; GEODYNAMIQUE; TERRANE.
Ano: 1990 URL: http://www.documentation.ird.fr/hor/fdi:30966
Registros recuperados: 46
Primeira ... 123 ... Última
 

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