Detailed Study of Three Contiguous Segments of the Mid-Atlantic Ridge, South of the Azores (37° N to 38°30′ N), Using Acoustic Imaging Coupled with Submersible Observations

Marine Geophysical Research

Volumn 19, Issue 3, 1997, Pages 231-255

  Ondréas, Hélène ^a   Fouquet, Yves ^a   Voisset, Michel ^a   Radford Knoery, Joël ^a  

^a IFREMER   (France)

Author keywords

Acoustic imaging; Azores; Explosive dynamics; Mid Atlantic Ridge; Morphostructure; Submersible study; Volcanism

Indexed keywords

ACOUSTIC IMAGERY; ACOUSTIC IMAGING; MARINE GEOPHYSICS; MID-OCEAN RIDGES; MORPHOLOGY; OCEAN FLOOR; SEA FLOOR; SEAFLOOR; SONAR IMAGE; SUBMERSIBLE OBSERVATIONS; SUBMERSIBLE STUDY; VOLCANISM;

ATLANTIC, MID-ATLANTIC RIDGE;

EID: 0031422215     PISSN: 00253235     EISSN: None     Source Type: Journal    
DOI: 10.1023/A:1004230708943     Document Type: Article

References (36)

1. Auffret G. A., Deloule E., Dennielou B., Gaillard J. F., Grousset F., Muller C., Needham D., Organo C., Reyss J. L., Richter T., Thomas B., and Watremez P., 1995, GEOFAR Record of Present and Past Hydrothermal Activity in the Sediment of the MAR South of the Azores, Terra Nova 7, 284.
2. Augustin, J. M., Edy, C., Savoye, B., and Le Drezen, E., 1994, Sonar Mosaic Computation from Multibeam Echo Sounder, Proc. IEEE Oceans 94 - Brest II, 433-438.
3. Ballard, R. D. and Moore, J. G., 1977, Photographic Atlas of the Mid-Atlantic Ridge, Springer, New York, 114 pp.
4. Ballard, R. D., Holcomb, R. T., and Van Andel, T., 1979, The Galapagos Rift at 86°W: Sheet-Flows, Collapse Pits and Lava Lakes of the Rift Valley, J. Geophys. Res. 84, 5407-5422.
5. Binard, N., Hékinian, R., Cheminée, J. L., and Stoffers, P., 1992, Styles of Eruptive Activity on Intraplate Volcanoes in the Society and Austral Hot Spot Regions: Bathymetry, Petrology and Submersible Observations, J. Geophys. Res. 97, 13999-14015.
6. Bonatti, E., 1990, No So Hot 'Hot Spots' in the Oceanic Mantle, Science 250, 107-111.
7. Bougault, H. and Treuil, M., 1980, Ride médio-atlantique: variations géochimique à âge zéro entre les acores et 22° N, Comptes Rendus de L'Académie des Sciences de Paris (D) 290 (22), 1389-1392.
8. Bourillet, J. F., Edy, C., Rambert, F., Satra, C., and Loubrieu, B., 1996, Swath Mapping System Processing: Bathymetry and Cartography, Marine Geophys. Res. 18, 487-506.
9. DeMets, C., Gordon, R. G., Argus, D. F., and Stein, S., 990, Current Plate Motions, Geophys. J. R. Astron. Soc. London 101, 425-478.
10. Dennielou, B., Richter, T., Ondréas, H., Boelaert, A., Auffret, G., Garlan, T., and Needham, D., 1995, Variabilité des dépôts sédimentaires sur la dorsale médio-Atlantique entre 37° N et 39° N: role de la morphologie et du volcanisme, Journées Spécialisées de la Société Géologique Française, 18 et 19 Décembre, Brest, p. 27.
11. Detrick, R. S., Needham, H. D., and Renard, V., 1995, Gravity Anomalies and Crustal Thickness Variations Along the Mid-Atlantic Ridge Between 33° N and 40° N, J. Geophys. Res. 100, 3767-3787.
12. Dugelay, S., Lurton, X., and Augustin, J. M., 1996, A New Method for Seafloor Characterization with Multibeam Echosounders: Image Segmentation using Angular Backscattering, 3rd European Conference on Underwater Acoustics, Heraklion, Crete, Greece 24-28 June, pp. 439-444.
13. Fouquet, Y., Stackelberg, U., Charlou, J. L., Erzinger, J., Herzig, P. M., Mühe, R., and Wiedicke, M., 1993, Metallogenesis in Back-Arc Environments: The Lau Basin Example, Econ. Geol. 88, 2154-2181.
14. Fouquet, Y., Ondréas, H., Charlou, J. L., Donval, J. P., Radford-Knoery, J., Costa, I., Lourenço, N., and Tivey, M. K., 1995, Atlantic Lava Lakes and Hot Vents, Nature 377, 201.
15. Fouquet, Y., Charlou, J. L., Donval, J. P., Radford-Knoery, J., Ondréas, H., Cambon, P., Bougault, H., Etoubleau, J., Barriga, F., Costa, I., Lourenco, N., and Tivey, M., Hydrothermal Processes on Shallow Volcanic Segments: MAR Near the Azores Triple Junction, J. Geophys. Res. (submitted).
16. Fouquet, Y., Eissen, J. P., Ondréas, H., and Danyushevsky, L., Deep Water (1700 m) Explosive Basalt Volcanism at the Mid-Atlantic Ridge, Terra Nova (submitted).
17. Francheteau, J., Juteau, T., and Rangin, C., 1979, Basaltic Pillars in Collapsed Lava-Pools on the Deep Ocean Floor, Nature 281 (5728), 209-211.
18. Freire Luis, J., Miranda, J. M., Galdeano, A., Patriat, P., Rossignol, J. C., and Mendes Victor, L. A., 1994, The Azores Triple Junction Evolution Since 10 Ma From an Aeromagnetic Survey of the Mid-Atlantic Ridge, Earth Planet. Sci. Lett. 125, 439-459.
19. Gente, P., 1987, Étude morphostructurale comparative de dorsales océaniques à taux d'expansion variés. Schéma d'évolution morphologique de l'axe des dorsales: liaisons avec l'hydrothermalisme, Thèse de Doctorat, Université de Bretagne Occidentale, 371 pp.
20. Gill, J., Torssander, P., Lapierre, H., Taylor, R., Kaiho, K., Koyama, M., Kusakabe, M., Aitchison, J., Cisowski, S., Dadey, K, Fujioka, K., Klaus, A., Lovell, M., Marsaglia, K., Pezard, P., Taylor, B., and Tazaki, K., 1990, Explosive Deep Water Basalt in the Sumisu Backarc Rift, Science 248, 1214-1217.
21. Herzig, P., Hannington, M., McInnes, B., Stoffers, P., Villinger, H., Seifert, R., Binns, R., and Liebe, T., 1994, Submarine Volcanism and Hydrothermal Venting Studied in Papua, New Guinea, EOS Trans. 75 (44), 513-516.
22. Kappel, E. S. and Ryan, W B. F., 1986, Volcanic Episodicity and a Non Steady-State Rift Valley Along the Northeast Pacific Spreading Centers: Evidence From Sea-Marc I, J. Geophys. Res. 91, 13925-13940.
23. Langmuir, C. H., Fornari, D., Colodner, D., Charlou, J. L., Costa, I., Desbruyeres, D., Desonie, D., Emerson, T., Fiala-Medioni, A., Fouquet, Y., Humphris, S., Saldanha, L., Sours-Page, R., Thatcher, M., Tivey, M., Van Dover, C., Von Damm, K., Wiese, K., and Wilson, C., 1993, Geological Setting and Characteristics of the Lucky Strike Vent Field at 37°17′ N on the Mid-Atlantic Ridge, EOS Trans AGU, Fall Meeting, 99 (Abstract).
24. Langmuir, C., Humphris, S., Fornari, D., Van Dover, C., Von Damm, K., Tivey, M. K., Colodner, D., Charlou, J. L., Desonie, D., Wilson, C., Fouquet, Y., Klinkhammer, G., and Bougault, H., 1997, Hydrothermal Vents Near a Mantle Hot Spot: The Lucky Strike Vent Field at 37°N on the Mid-Atlantic Ridge, Earth Planet. Sci. Lett. 148, 69-91.
25. Le Douaran, S. and Francheteau, J., 1981, Axial Depth Anomalies From 10° to 50° North Along the Mid-Atlantic Ridge: Correlation With Other Mantle Properties, Earth Planet. Sci. Lett. 54, 29-47.
26. Mac Birney, A. R., 1963, Factors Governing the Nature of Submarine Volcanism, Bull. Volcanol. 26, 455-469.
27. Macdonald, K. C., 1982, Mid-Ocean Ridges: Fine Scale Tectonic, Volcanic and Hydrothermal Processes within the Plate Boundary Zone, Annu. Rev. Earth Planet. Sci. 10, 155-190.
28. Macdonald, K. C., Scheirer, D. S., and Carbotte, S. M., 1991, Mid-Ocean Ridges: Discontinuities, Segments and Giant Cracks, Science 253, 986-994.
29. Menard, H. W., 1967, Seafloor Spreading, Topography and the Second Layer, Science 157, 923-924.
30. Needham, H. D., Voisset, M., Renard, V., and Bougault, H., 1992, Structural and Volcanic Features of the Mid-Atlantic Rift Zone Between 40° N and 33° N, EOS Trans AGU, Fall Meeting, 552 (Abstract).
31. Ondréas, H., Fouquet, Y., Charlou, J. L., Costa, I., Donval, J. P., Knoery, J., Lourenço, N., Pelle, H., Segonzac, M., and Tivey, M., 1995, Diva 1 Cruise: In Situ Observation of the Limit between Effusive and Explosive Submarine Volcanism on the Menez-Gwen and 38°20′ N Segments of the Mid-Atlantic Ridge, Terra Nova 7, 209.
32. Peckover, R. S., Buchanan, D. J., and Ashby, D. E. T. F., 1973, Fuel-Coolant Interactions in Submarine Volcanism, Nature 245, 307-308.
33. Radford-Knoery, J., Aballea, M., Charlou, J. L., Donval, J. P., Fouquet, Y., Ondréas, H., and Pelle, H., Near Seafloor Distribution of Sulfide, Methane and Manganese at the Menez-Gwen and Lucky Strike Hydrothermal Sites (Mid-Atlantic Ridge), Deep-Sea Research (in press).
34. Schilling, J. G., 1975, Azores Mantle Blob: Rare-Earth Evidence, Earth Planet. Sci. Lett. 25, 103-115.
35. 2O-NACl at Elevated Temperatures and Pressures, Amer. J. Sci. 260, 115-141.
36. Wright, J. V., Smith, A. L., and Self, S., 1980, A Working Terminology of Pyroclastic Deposits, J. Volcanol. Geothermal Res. 8, 315-336.