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| Registros recuperados: 61 | |
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| Feraud, Gilbert; Gastaud, Janine; Auzende, Jean-marie; Olivet, Jean-louis; Cornen, Guy. |
| Gorringe Bank is situated on the Europe-Africa plate boundary at the eastern end of the Azores-Gibraltar fracture zone. It has two summits. Gettysburg Bank to the southwest and Ormonde Bank to the northeast. We applied the 40Ar/39AR stepwise heating method to date six samples of the alkaline volcanic rocks. Two gabbros from the Ormonde Bank and a dolerite from the Gettysburg Bank. The results suggest that the alkaline volcanism lasted probably for less than 6 Ma(66-60 Ma). Although the nature of this volcanism precludes any subduction feature during its setting. the alkaline volcanism of Ormonde is probably linked to Upper Cretaceous/Eocene compressive tectonic events. The basement rocks of Gorringe Bank reveal disturbed 40Ar/39Ar age spectra. One... |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1981 |
URL: http://archimer.ifremer.fr/doc/1981/publication-5365.pdf |
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| Sibuet, Jean-claude; Mathis, B; Pastouret, Léo; Auzende, Jean-marie; Foucher, Jean-paul; Hunter, Peter; Guennoc, P; De Graciansky, Pc; Montadert, L; Masson, Douglas. |
| Tipo: Text |
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| Ano: 1985 |
URL: http://archimer.ifremer.fr/doc/00184/29494/27815.pdf |
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| Auzende, Jean-marie; Eissen, Jean-philippe; Caprais, Marie-paule; Gente, Pascal; Gueneley, S; Harmegnies, Francois; Lagabrielle, Yves; Lapouille, A; Lefevre, C; Maillet, P; Maze, Jean-pierre; Ondreas, Helene; Schaaf, A; Singh, R. |
| Seismic, Seabeam, magnetic and gravimetrie surveys in the southern part of the N-Fiji basin were conducted during the SEAPSO LEG III Cruise. The active spreading axis was recognized between 17°30'S and 21°S. It consists of a continuous N-S Ridge cross-cut by transverse directions oriented N25 and N45. North of 17°30'S, the spreading System is more complex due to the existence of a possible triple junction located around 15° S. The eastern part of the N-Fiji basin, west of Viti Levu is mostly characterized by alternating highs and deeps (<4,000 m). This area must be regarded no more as a spreading center, but as complex boundary suffering transverse tectonics. |
| Tipo: Text |
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| Ano: 1986 |
URL: http://archimer.ifremer.fr/doc/00184/29492/27835.pdf |
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| Auzende, Jean-marie; Ballu, Valerie; Batiza, R; Bideau, Daniel; Cormier, Mh; Fouquet, Yves; Geistdoerfer, Patrick; Lagabrielle, Yves; Sinton, J; Spadea, P. |
| The submersible-study of four segments of the East Pacific Rise between 17 degrees and 18 degrees 40'S, where the spreading rate is greater than 150 mm/a, allows us to confirm the variability of the accretion processes. The segment between 17 degrees and 17 degrees 30'S shows an intense present-day magmatic activity. The one between 18 degrees 10' and 18 degrees 22'S shows a mainly tectonic activity. The segment between 18 degrees 22' and 18 degrees 37'S is an intermediate stage with an axial graben in which fresh lavas were emplaced by an extremely young eruption. On all the segments the hydrothermal activity exists ranging from shimmering water up to black smokers, It is associated with different stages of animal colonization. |
| Tipo: Text |
Palavras-chave: Océan Pacifique; Dorsale ultra-rapide; Magmatisme; Tectonique; Hydrothermalisme.; PACIFIC OCEAN; ULTRA-FAST SPREADING RIDGE; MAGMATISM; TECTONICS; HYDROTHERMALISM. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00183/29458/27840.pdf |
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| Auzende, Jean-marie; Halbach, P; Allspach, A; Becker, K; Blum, N; Bonnier, Olga; Van Gerven, M; Halbach, M; Koschinsky, A; Lange, D; Madureira, Mj; Manoutsoglou, E; Mrazek, J; Munch, U; Pratt, C; Rahders, E; Van Reusel, A; Richter, S; Seifert, T; Spangenberg, T; Stenzler, J; Thiermann, F; Turkay, M; Windoffer, R. |
| The aim of the HYFIFLUX-SONNE 99 cruise was the geological, biological and chemical study of the 2 triple-junctions characterizing the oceanic accretion in the North Fiji Basin. Multibeam bathymetric coverage, in situ observations and sampling confirmed the existence of an active spreading ridge immediately west of the Fiji islands (WFR), and gave an evaluation of the magmatic and hydrothermal activity of the central ridge (CSR). New hydrothermal sites have been discovered and sampled. |
| Tipo: Text |
Palavras-chave: SW Pacifique; Dorsales; Magmatisme; Tectonique; Hydrothermalisme.; SW PACIFIC; RIDGES; MAGMATISM; TECTONISM; HYDROTHERMALISM. |
| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/00183/29453/27843.pdf |
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| Auzende, Jean-marie; Cannat, M; Gente, Pascal; Henriet, Jean-pierre; Juteau, Thierry; Karson, J; Lagabrielle, Yves; Mevel, Christophe; Tivey, M. |
| The aim of the 20 Nautile dives of the recent Kanaut cruise was the study of the Kane Fracture Zone from its intersection with the Mid-Atlantic Ridge up to 80 km to the west. The dives have been conducted along four massifs located along the southern wall of the fracture valley. The flanks of the massifs consist of slightly tilted peridotites, gabbros and basalts, which have been exposed along normal and strike-slip major faults. No dike complex similar to that observed along the ZF Vema was observed The observed sections show pervasive cataclastic deformation and greenschist-facies metamorphic overprint. |
| Tipo: Text |
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| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/00183/29470/27886.pdf |
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| Le Lann, Alain; Auzende, Jean-marie; Olivet, Jean-louis. |
| We present in this paper raw data and preliminary results of CYAGOR dives (July-August 1977) on Gorringe bank (SW Portugal). A series of eight dives with submersible SP 3000 Cyana, from 2 600 to 40 m depth, enabled us to observe the outcrop of the bank flanks, a nearly complete cross-section of oceanic crust and upper mantle. The structure seems to be little affected by fracturing and is slightly rocked to the NE. Cross-sections made during the dives show characteristics similar to those of an ophiolitic complex. |
| Tipo: Text |
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| Ano: 1979 |
URL: https://archimer.ifremer.fr/doc/00418/52940/53880.pdf |
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| Jolivet, J.l.; Bonnin, J; Beuzart, Paul; Auzende, Jean-marie. |
| The three central chapters of this work constitute an explanatory comment of the jointed Central North Atlantic reconstruction maps. In the first chapter, the model is situated relatively to other works devoted to the evolution of the Atlantic ocean, the data used and the methods followed are exposed. In th fifth chapter, we discuss some of the several implications of the model. The main characteristic of this approach is that it aims to integrate from the beginningthe major plate system constituted by: the North American, Eurasian and African plates. For each geological period, results of the detailed regional studies are referred to the evolution of the whole system and evaluated according to it. [NOT CONTROLLED OCR] |
| Tipo: Text |
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| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/publication-7439.pdf |
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| Olivet, Jean-louis; Auzende, Jean-marie; Mascle, Jean; Monti, S.; Pastouret, Léo; Pautot, Guy. |
| Recent data on the western Mediterranean basin (Joides cruise, Montadert et al., 1970, Auzende et al., 1971, Le Borgne et al., 1971) and its connection with the evolution of the Atlantic area (Le Pichon et al., 1970, Talwani et al., 1971, Le Pichon et al. in writing) lead us, like other authors (Dubourdieu, 1962, Stanley and Mutti, 1968, Ryan, 1969 amongst others) to admit the theory of an opening of the Algero-provencal basin during the Cenozoic era. A series of arguments drove us to formulate the hypothesis of an Oligocene age (in process). This work is in line with this perspective. [...] |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1971 |
URL: http://archimer.ifremer.fr/doc/1971/publication-4907.pdf |
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| Auzende, Jean-marie; Ishibashi, J; Beaudouin, Y; Charlou, Jean-luc; Delteil, J; Donval, Jean-pierre; Fouquet, Yves; Gouillou, Jp; Ildefonse, B; Kimura, H; Nishio, Y; Knoery, Joel; Ruollan, E. |
| In 1995, a joint French‐Japanese cruise (ManusFlux) explored the Manus Spreading Center and some sites of the South Eastern Rift in the Manus Basin off the coast of Papua New Guinea (Figure 1) with the Japanese submersible [Auzende et al., 1996; Gamo et al., 1997]. In the framework of this joint project, called New STARMER, the French and Japanese teams completed the Manaute cruise with the R/V LAtalante and the Ifremer submersible Nautile in April and May 2000. The Manaute cruise explored and sampled volcanic and hydrothermal sites in the eastern part of Manus Basin and on the spreading axis of the Western Ridge (WR). The eastern part of the Manus Basin (Figure 2) was interpreted as a stretched‐back arc basin crust showing alternatively elongated ridges... |
| Tipo: Text |
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| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00069/18055/15597.pdf |
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| Auzende, Jean-marie; Boespflug, Xavier; Bougault, Henri; Dosso, Laure; Foucher, Jean-paul; Joron, Jean-louis; Ruellan, Etienne; Sibuet, Jean-claude. |
| Three cruises (POP 1, SEAPSO 3 and SEAPSO 4) carried out during the "Tour du Monde" of the R.V. Jean Charcot allow us to obtain new structural and geochemical data for the Okinawa, North Fiji and Lau basins. Taken together, the structural and geochemical data illustrate a difference in evolution stages of these sites. The less evolved stage is represented by the Okinawa basin, where accretion is evidenced only by volcanic intrusion into a thinned continental crust. The most evolved stage is illustrated in the North Fiji basin, where the present-day accretion can be directly compm·ed to the East Pacific Ridge. The Lau basin displays an intem1ediate stage with a complex system of accretionary ridges. This difference in the evolution stage is translated in... |
| Tipo: Text |
Palavras-chave: Ouest Pacifique; Bassins arriere arc; Structure; Accretion; Geochimie; West Pacific; Back arc basins; Structure; Accretion; Geochemistry. |
| Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/00119/23058/20893.pdf |
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| Auffret, Gerard; Auzende, Jean-marie; Cousin, Michel; Coutelle, Alain; Dobson, M; Geoghegan, M; Masson, D.; Rolet, J; Vaillant, P. |
| The aim of the joint French-British CYAPORC submersible cruise was the exploration and sampling of the Porcupine and Goban Escarpments. A paleozoic mesozoic sedimentary cover has been evidenced abov ea caledonian or older cristalline basement on the Porcupine scarp. On the Goban scarp, the observed outcrops are mainly lower Cretaceous carbonates overlying paleozoic sandstones |
| Tipo: Text |
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| Ano: 1987 |
URL: http://archimer.ifremer.fr/doc/00184/29489/27853.pdf |
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| Geistdoerfer, P; Auzende, Jean-marie; Batiza, R; Bideau, Daniel; Cormier, Mh; Fouquet, Yves; Lagabrielle, Yves; Sinton, J; Spadea, P. |
| 70 hydrothermal sites were observed during the 23 dives of the French submersible Nautile (''Naudur'' cruise, December 1993), at 17-degrees-19-degrees-S on the East Pacific Rise. Large vent-animal communities are present around these sites. The zoological composition of these communities is the same as that of the communities at 11-degrees-13-degrees-N and 21-degrees-N on the East Pacific Rise. However, the distribution of the species on the sites is different from all the other hydrothermal communities; large anemone fields of several hundred square metres, associated with colonies of Bathymodiolus and Calyptogena, have been observed. Fresh lava areas seem to bear the most important biological activity. |
| Tipo: Text |
Palavras-chave: Hydrothermalisme; Dorsale Est Pacifique; Communautés animales.; HYDROTHERMAL VENTS; EAST PACIFIC RISE; ANIMAL COMMUNITIES. |
| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/00183/29454/27856.pdf |
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| Auzende, Jean-marie; Urabe, T.; Tanahashi, M.; Ruellen, E.; Bendel, V.; Fiala-medioni, A.; Fujikura, K.; Geistdoerfer, P.; Gracia-mont, E.; Grimaud, D.; Ihibashi, J. I.; Joshima, M.; Kisimoto, K.; Kojima, S.; Maillet, P.; Matsumoto, T.; Mitsuzawa, K.; Murai, M.; Naka, J.; Nargeolet, P. H.; Nojiri, Y.; Ohta, S.; Pranal, V.; Pratt, C.. |
| Since 1987, Japanese and French geologists, geophysicists, and biologists have been studying the North Fiji Basin Ridge within the framework of a joint project named STARMER (Science and Technology Agency of Japan—IFREMER of France). This ridge was first geologically, geophysically, and geochemically surveyed during the 1985 SEAPSO 3 cruise of the R/V Jean Charcot [Auzende et al., 1988]. At that time, water sampling and morphotectonic analysis indicated that the North Fiji Basin Ridge was technically and hydrothermally active. Within the STARMER project, four surface ship cruises have been conducted {Kaiyo 87‐88‐89 and Yokosuka 90). One significant result of these surveys is the complete mapping of the entire ridge between 14°S and 22°S (Figure 1), an area... |
| Tipo: Text |
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| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/00451/56267/57838.pdf |
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| Registros recuperados: 61 | |
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