TY - JOUR
T1 - In situ geological and geochemical study of an active hydrothermal site on the North Fiji Basin ridge
AU - Auzende, Jean Marie
AU - Urabe, Tetsuro
AU - Bendel, Valérie
AU - Deplus, Christine
AU - Eissen, Jean Philippe
AU - Grimaud, Daniel
AU - Huchon, Philippe
AU - Ishibashi, Junishiro
AU - Joshima, Masato
AU - Lagabrielle, Yves
AU - Mével, Catherine
AU - Naka, Jiro
AU - Ruellan, Etienne
AU - Tanaka, Takeo
AU - Tanahashi, Manabu
PY - 1991/6
Y1 - 1991/6
N2 - In June 1989 a diving cruise by the submersible Nautile was carried out on the North Fiji Basin spreading ridge. The objective of the cruise was a geological and geochemical study of the active spreading axis and associated hydrothermal processes. This operation was the third cruise of the French-Japanese Starmer project following the two cruises of the R.V. Kaiyo in 1987 and 1988. Six dives along the spreading axis between 16°58′S and 17°00S show that the axial graben consists of alternating N15-trending horsts and grabens. Extinct hydrothermal sites have been observed all along the graben. These consist of fossil chimneys, oxide staining and dead shells. At 16°59′S an active chimney has been discovered and called the "White Lady" because of its almost exclusively anhydrite composition. This chimney expels a peculiar water characterized by low chlorinity and a 285°C maximum temperature. In the northern extremity of the N15 axis a wide fossil hydrothermal site has been explored and sampled. It is located in an area cut by N15, N140 and N60-trending faults and fissures.
AB - In June 1989 a diving cruise by the submersible Nautile was carried out on the North Fiji Basin spreading ridge. The objective of the cruise was a geological and geochemical study of the active spreading axis and associated hydrothermal processes. This operation was the third cruise of the French-Japanese Starmer project following the two cruises of the R.V. Kaiyo in 1987 and 1988. Six dives along the spreading axis between 16°58′S and 17°00S show that the axial graben consists of alternating N15-trending horsts and grabens. Extinct hydrothermal sites have been observed all along the graben. These consist of fossil chimneys, oxide staining and dead shells. At 16°59′S an active chimney has been discovered and called the "White Lady" because of its almost exclusively anhydrite composition. This chimney expels a peculiar water characterized by low chlorinity and a 285°C maximum temperature. In the northern extremity of the N15 axis a wide fossil hydrothermal site has been explored and sampled. It is located in an area cut by N15, N140 and N60-trending faults and fissures.
UR - http://www.scopus.com/inward/record.url?scp=0026302145&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0026302145&partnerID=8YFLogxK
U2 - 10.1016/0025-3227(91)90106-E
DO - 10.1016/0025-3227(91)90106-E
M3 - Article
AN - SCOPUS:0026302145
SN - 0025-3227
VL - 98
SP - 259
EP - 269
JO - Marine Geology
JF - Marine Geology
IS - 2-4
ER -