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| Bougault, H; Appriou, P; Birolleau, A; Charlou, J L; Gane, K; Etoubleau, J; Fouquet, Y; Sichler, B; Voisset, M. |
| Hydrofast Cruise of the R.V. Jean Charcot addressed the important problem of the variation of hydrothermal activity along the strike of the Ridge over a distance of 100 km with respect to the structure of the ridge axis. This cruise was conducted along the East Pacific Rise between the OSC at 11 degree 45'N and the topographic high at 13 degree N. To reach that objective, a new tool, the dynamic hydrocast, was used. This technique obtains average samples mile per mile, horizontally, at 4 different depths above the bottom. Temperature is recorded at the same time. In addition, the side-scan sonar SAR gave a continuous picture of the fissures along the strike and of the different facies within the 300 to 400 m width of the axial graben. A magnetometer and a... |
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| Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/00268/37914/35995.pdf |
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| Foucher, J P; Bouysse, P; Davagnier, M; Dupont, J; Eissen, J P; Fouquet, Y; Gueneley, S; Harmegnies, F; Lapouille, A. |
| The Lau Basin lies between the Lau and Tonga ridges and extends over more than 1000 km. Its width decreases from 300 km near 16 degree S to less than 100 km near 24S. It is an actively spreading oceanic back-arc basin created in the Plio-Pleistocene the Tonga Trench. The part of the Valu Fa ridge North of 22 degree S was investigated during the Seapso 4 cruise of R/V Jean Charcot in Jan 1986 and complementary data were obtained during the Papnoum transit (Apr 1987). The techniques used included multibeam bathymetry, single-channel seismic reflection, magnetic and gravity field measurements. |
| Tipo: Text |
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| Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/00268/37933/36014.pdf |
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