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| Auzende, Jean-marie; Tanahashi, M; Bendel, V; Fujikura, K; Geistdoerfer, P; Gracia Mont, Eulalia; Joshima, M; Kisimoto, K; Mitsuzawa, K; Murai, M; Nojiri, Y; Ondreas, Helene; Pratt, C; Ruellan, Etienne. |
| The aim of the YOKOSUKA 91 cruise (October 1991) of the Japanese submersible Shinkai 6500 was to come back on two hydrothermal sites of the axis of the North Fiji Basin ridge which had already been explored by the submersible Nautile in 1989. This cruise gave us the opportunity to show that the hydrothermal manifestations vary a lot in terms of geology, geochemistry or biology during a very short time. A new site which is located in a deep graben of the N 160 ridge axis showed only activity along a fault system marked by sulphide deposits. |
| Tipo: Text |
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| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/00184/29486/27854.pdf |
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| Ondreas, Helene; Ruellan, Etienne; Auzende, Jean-marie; Bendel, V; De Alteriis, G; Gracia Mont, Eulalia; Tanahashi, M. |
| During the STARMER programme the submersibles Nautile and Shinkai-6500 carried out 14 dives on the NS segment of the North Fiji Basin Ridge (Station 14 at 18-degrees-50 S). From structural point of view, two types of morphology appear: in the northern part, the axis is not tectonically well expressed hut the hydrothermal activity is important. in the southern part, a graben structure 150 m wide exists, with both a.fossil and a present-day hydrothermal activity. The station 14 shows a morphostructural variability of the spreading axis which can be related to the different stages of the volcanic and tectonic cycles. Another station explored at 19-degrees-S, a few kilometres to the south, confirms the fact that different stages of tectonic and magmatic... |
| Tipo: Text |
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| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/00184/29476/27855.pdf |
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