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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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