The Ultraslow Spreading Southwest Indian Ridge

Diversity of Hydrothermal Systems on Slow Spreading Ocean Ridges

Volumn , Issue , 2013, Pages 153-173

  Sauter, Daniel ^a   Cannat, Mathilde ^b  

^a UNIVERSITÉ DE STRASBOURG EOST   (France)

^b INSTITUT DE PHYSIQUE DU GLOBE DE PARIS   (France)

Author keywords

Chemical oceanography; Focusedmagmatism; Hydrothermal deposits; Hydrothermal vents; Meltsupply; Mid oceanridgesegmentation; Nonvolcanicspreading; Ridge hotspotinteraction; Sea floor spreading

Indexed keywords

HOT SPRINGS; OCEANOGRAPHY; ORE DEPOSITS;

CHEMICAL OCEANOGRAPHY; FOCUSEDMAGMATISM; HYDROTHERMAL DEPOSITS; HYDROTHERMAL VENT; MELTSUPPLY; MID-OCEANRIDGESEGMENTATION; NONVOLCANICSPREADING; RIDGE-HOTSPOTINTERACTION; SEAFLOOR SPREADING;

VOLCANOES;

EID: 84952943538     PISSN: None     EISSN: None     Source Type: Book    
DOI: 10.1029/2008GM000843     Document Type: Chapter

References (139)

1. Baines, A. G., M. J. Cheadle, H. J. B. Dick, A. H. Scheirer, B. E. John, N. J. Kusznir, and T. Matsumoto (2007), Evolution of the Southwest Indian Ridge from 55°45'E to 62°E: Changes in plateboundary geometry since 26 Ma, Geochem. Geophys. Geosyst., 8(6), Q06022, doi:10.1029/2006GC001559.
2. Ben-Avraham, Z., C. J. H. Hartnady, and A. P. L. Roex (1995), Neotectonic activity on continental fragments in the Southwest Indian Ocean: Agulhas Plateau and Mozambique Ridge, J. Geophys. Res., 100(B4), 6199-6211.
3. Bergh, H. W., and D. M. Barrett (1980), Aghulas Basin magnetic bight, Nature, 287, 591-595).
4. Bernard, A., M. Munschy, Y. Rotstein, and D. Sauter (2005), Refined spreading history at the Southwest Indian Ridge for the last 96 Ma, with the aid of satellite gravity data, Geophys. J. Int., 162(3), 765-778.
5. Bonatti, E. (1990), Not so hot "hot spots" in the oceanic mantle, Science, 250, 107-111.
6. Bown, J. W., and R. S. White (1994), Variation with spreading rate of oceanic crustal thickness and geochemistry, Earth Planet. Sci. Lett., 121, 435-449.
7. Brunelli, D., A. Cipriani, L. Ottolini, A. Peyve, and E. Bonatti (2003), Mantle peridotites from the Bouvet Triple Junction Region, South Atlantic, Terra Nova, 15, 194-203, doi: 110.1046/j.1365-3121.2003.00482.x.
8. Buck, W. R., L. L. Lavier, and A. N. B. Poliakov (2005), Modes of faulting at mid-ocean ridges, Nature, 434, 719-723.
9. Cande, S. C., and D. V. Kent (1995), Revised calibration of the geomagnetic polarity timescale for the Late Cretaceous and Cenozoic, J. Geophys. Res., 100(B4), 6093-6095.
10. Cann, J. R., D. K. Blackman, D. K. Smith, E. McAllister, B. Janssen, S. Mello, E. Avgerinos, A. R. Pascoe, and J. Escartín (1997), Corrugated slip surfaces formed at North Atlantic ridgetransform intersections, Nature, 385, 329-332.
11. Cannat, M. (1996), How thick is the magmatic crust at slow spreading oceanic ridges?, J. Geophys. Res., 101(B2), 2847-2857.
12. Cannat, M., Y. Lagabrielle, H. Bougault, J. Casey, N. de Coutures, L. Dmitriev, and Y. Fouquet (1997), Ultramafic and gabbroic exposures at the Mid-Atlantic Ridge: Geological mapping in the 15°N region, Tectonophysics, 279, 193-213.
13. Cannat, M., C. Rommevaux-Jestin, D. Sauter, C. Deplus, and V. Mendel (1999), Formation of the axial relief at the very slow spreading Southwest Indian Ridge (49°-69°E), J. Geophys. Res., 104(B10), 22,825-22,843.
14. Cannat, M., C. Rommevaux-Jestin, and H. Fujimoto (2003), Melt supply variations to a magma-poor ultra-slow spreading ridge (Southwest Indian Ridge 61° to 69°E), Geochem. Geophys. Geosyst., 4(8), 9104, doi:10.1029/2002GC000480.
15. Cannat, M., J. Cann, and J. Maclennan (2004), Some hard rock constraints on the supply of heat to mid-ocean ridges, in The Thermal Structure of the Ocean Crust and Dynamics of Hydrothermal Circulation, edited by C. German et al., pp. 111-149, AGU, Washington, D. C.
16. Cannat, M., D. Sauter, V. Mendel, E. Ruellan, K. Okino, J. Escartin, V. Combier, and M. Baala (2006), Modes of seafloor generation at a melt-poor ultraslow-spreading ridge, Geology, 34(7), 605-608.
17. Cannat, M., D. Sauter, A. Bezos, C. Meyzen, E. Humler, and M. Le Rigoleur (2008a), Spreading rate, spreading obliquity, and melt supply at the ultraslow spreading Southwest Indian Ridge, Geochem. Geophys. Geosyst., 9, Q04002, doi:10.1029/2007GC001676.
18. Cannat, M., D. Sauter, L. Lavier, and J. Escartin (2008b), Oceanic corrugated surfaces and the strength of the axial lithosphere at slow spreading ridges, Eos Trans. AGU, 89(53), Fall Meet.Suppl., Abstract T34A-01.
19. Cannat, M., D. Sauter, J. Escartín, L. Lavier, and S. Picazo (2009), Oceanic corrugated surfaces and the strength of the axial lithosphere at slow spreading ridges, Earth Planet.Sci. Lett., 288, 174-183.
20. Chu, D., and R. G. Gordon (1999), Evidence for motion between Nubia and Somalia along the Southwest Indian Ridge, Nature, 398, 64-67.
21. Debayle, E., and J. J. Lévêque (1997), Upper mantle heterogeneities in the Indian Ocean from waveform inversions, Geophys. Res. Lett., 24(3), 245-248.
22. Debayle, E., B. Kennett, and K. Priestley (2005), Global azimuthal seismic anisotropy and the unique plate-motion deformation of Australia, Nature, 433, 509-512.
23. Dick, H. J. B. (1989), Abyssal peridotites, very slow spreading ridges and ocean ridge magmatism, in Magmatism in the Ocean Basins,Geol. Soc. Spec. Publ., vol. 42, edited by A. D. Saunders and M. J. Norry, pp. 71-105.
24. Dick, H. J. B., H. Schouten, P. S. Meyer, D. G. Gallo, H. Bergh, R. Tyce, P. Patriat, K. T. M. Johnson, J. Snow, and A. Fischer (1991), Tectonic evolution of the Atlantis II Fracture Zone, in Proc. Ocean Drill. Program Sci. Results, vol. 118, edited by R. P. Von Herzeen et al., pp. 359-398, Ocean Drill. Program, College Station, TX.
25. Dick, H. J. B., P. T. Robinson, and P. S. Meyer (1992), The plutonic foundation of a slow-spreading ridge, in Synthesis of Results from Scientific Drilling in the Indian Ocean,Geophys. Monogr. Ser., vol. 70, edited by R. A. Duncan et al., pp. 1-39, AGU, Washington, D. C.
26. Dick, H. J. B., J. E. Georgen, A. P. L. Roex, J. Lin, and J. A. Madsen (1998), The influence of ridge geometry on mantle melting at an ultra-slow spreading ridge, Eos Trans. AGU, 79, Fall Meet. Suppl., Abstract F919.
27. Dick, H. J. B., et al. (2000), A long in situ section of the lower oceanic crust: Results of ODP leg 176 drilling at the Southwest Indian Ridge, Earth Planet. Sci. Lett., 179, 31-51.
28. Dick, H. J. B., J. Lin, and H. Schouten (2003), An ultraslowspreading class of ocean ridge, Nature, 426, 405-412.
29. Dyment, J. (1993), Evolution of the Indian Ocean triple junction between 65 and 49 Ma (Anomalies 28 to 21), J. Geophys. Res., 98(B8), 13,863-13,877.
30. Dziewonski, A. M., and D. L. Anderson (1981), Preliminary reference earth model, Phys. Earth Planet. Inter., 25(4), 297-356.
31. Eagles, G., and M. Konig (2008), A model of plate kinematics in Gondwana breakup, Geophys. J. Int., 137(2), 703-717.
32. Escartín, J., and M. Cannat (1999), Ultramafic exposures and the gravity signature of the lithosphere near the Fifteen-Twenty Fracture Zone (Mid-Atlantic Ridge, 14°-16.5°N), Earth Planet. Sci. Lett., 171, 411-424.
33. Fisher, R. L., and A. M. Goodwillie (1997), The physiography of the Southwest Indian Ridge, Mar. Geophys. Res., 19, 451-455.
34. Font, L., B. J. Murton, S. Roberts, and A. G. Tindle (2007), Variations in melt productivity and melting conditions along SWIR (70°E-49°E): Evidence from olivine-hosted and plagioclasehosted melt inclusions, J. Petrol., 48(8), 1471-1494.
35. Fujimoto, H., et al. (1999), First submersible investigations of midocean ridges in the Indian Ocean, InterRidge News, 8, 22-24.
36. Georgen, J. E. (2008), Mantle flow and melting beneath oceanic ridge-ridge-ridge triple junctions, Earth Planet. Sci. Lett., 270, 231-240.
37. Georgen, J. E., and J. Lin (2002), Three-dimensional passive flow and temperature structure beneath ridge-ridge-ridge triple junctions, Earth Planet. Sci. Lett., 204, 115-132.
38. Georgen, J. E., J. Lin, and H. J. B. Dick (2001), Evidence from gravity anomalies for interactions of the Marion and Bouvet hotspots with the Southwest Indian Ridge: Effects of transform offsets, Earth Planet. Sci. Lett., 187, 283-300.
39. Gomez, O., A. Briais, D. Sauter, and V. Mendel (2006), Tectonics at the axis of the very slow spreading Southwest Indian Ridge: Insights from TOBI side-scan sonar imagery, Geochem. Geophys. Geosyst., 7(5), Q05K12, doi:10.1029/2005GC000955.
40. Gràcia, E., J. L. Charlou, J. R. Radford-Knoery, and L. M. Parson (2000), Non-transform offsets along the Mid-Atlantic Ridge south of the Azores (38°N-34°N): Ultramafic exposures and hosting of hydrothermal vents, Earth Planet. Sci. Lett., 177, 89-103.
41. Grindlay, N. R., J. A. Madsen, C. Rommevaux, and J. Sclater (1998), A different pattern of ridge segmentation and mantle Bouguer gravity anomalies along the ultra-slow spreading Southwest Indian Ridge (15°30'E to 25°E), Earth Planet. Sci. Lett., 161, 243-253.
42. Honsho, C., K. Tamaki, and H. Fujimoto (1996), Three-dimensional magnetic and gravity studies of the Rodriguez Triple Junction in the Indian Ocean, J. Geophys. Res., 101(B7), 15,837-15,848.
43. Hooft, E. E. E., R. S. Detrick, D. R. Toomey, J. A. Collins, and J. Lin (2000), Crustal thickness and structure along three contrasting spreading segments of the Mid-Atlantic Ridge, 33.5°-35°N, J. Geophys. Res., 105(B4), 8205-8226.
44. Horner-Johnson, B. C., R. G. Gordon, S. M. Cowles, and D. F. Argus (2005), The angular velocity of Nubia relative to Somalia and the location of the Nubia-Somalia-Antarctica triple junction, Geophys. J. Int., 162(1), 221-238.
45. Horner-Johnson, B. C., R. G. Gordon, and D. F. Argus (2007), Plate kinematic evidence for the existence of a distinct plate between the Nubian and Somalian plates along the Southwest Indian Ridge, J. Geophys. Res., 112, B05418, doi:10.1029/2006JB004519.
46. Hosford, A., M. Tivey, T. Matsumoto, H. Dick, H. Schouten, and H. Kinoshita (2003), Crustal magnetization and accretion at the Southwest Indian Ridge near the Atlantis II fracture zone, 0-25 Ma, J. Geophys. Res., 108(B3), 2169, doi:10.1029/2001JB000604.
47. Janney, P. E., A. P. L. Roex, and R. W. Carlson (2005), Hafnium isotope and trace element constraints on the nature of mantle heterogeneity beneath the Central Southwest Indian Ridge (13°E to 47°E), J. Petrol., 46(12), 2427-2464.
48. Jokat, W., and M. C. Schmidt-Aursch (2007), Geophysical characteristics of the ultraslow spreading Gakkel Ridge, Arctic Ocean, Geophys. J. Int., 168(3), 983-998.
49. Jokat, W., O. Ritzmann, M. C. Schmidt-Aursch, S. Drachev, S. Gauger, and J. Snow (2003), Geophysical evidence for reduced melt production on the Arctic ultraslow Gakkel mid-ocean ridge, Nature, 423(26), 962-965.
50. Klein, E. M., and C. H. Langmuir (1987), Global correlations of ocean ridge basalt chemistry with axial depth and crustal chemistry, J. Geophys. Res., 92(B8), 8089-8115.
51. Kuhn, T., D. Burger, D. Castradori, and P. Halbach (2000), Volcanic and hydrothermal history of ridge segments near the Rodrigues Triple Junction (Central Indian Ocean) deduced from sediment geochemistry, Mar. Geol., 169(3-4), 391-409.
52. Langmuir, C. H., E. M. Klein, and T. Plank (1992), Petrological systematics of mid-ocean ridge basalts: Constraints on melt generation beneath mid-ocean ridges, in Mantle Flow and Melt Generation at Mid-Ocean Ridges, edited by J. Phipps Morgan et al., pp. 183-280, AGU, Washington, D. C.
53. Lehnert, K., Y. Su, C. H. Langmuir, B. Sarbas, and U. Nohl (2000), A global geochemical database structure for rocks, Geochem. Geophys. Geosyst., 1(5), 1012, doi:10.1029/1999GC000026.
54. Lemaux, J., R. G. Gordon, and J. Y. Royer (2002), Location of the Nubia-Somalia boundary along the Southwest Indian Ridge, Geology, 30(4), 339-342.
55. LeRoex, A. P., H. J. B. Dick, A. J. Erlank, A. M. Reid, F. A. Frey, and S. R. Hart (1983), Geochemistry, mineralogy and petrogenesis of lavas erupted along the Southwest Indian Ridge between the Bouvet Triple Junction and 11°E, J. Petrol., 24, 267-318.
56. LeRoex, A. P., H. J. B. Dick, and R. T. Watkins (1992), Petrogenesis of anomalous K-enriched MORB from the Southwest Indian Ridge: 11°53' to 14°38'E, Contrib. Mineral. Petrol., 110, 253-268.
57. Ligi, M., E. Bonatti, G. Bortoluzzi, G. Carrara, P. Fabretti, D. Penitenti, D. Gilod, A. A. Peyve, S. Skolotnev, and N. Turko (1997), Death and transfiguration of a triple junction in the South Atlantic, Science, 276, 243-245.
58. Ligi, M., E. Bonatti, G. Bortoluzzi, G. Carrara, P. Fabretti, D. Gilod, A. A. Peyve, S. Skolotnev, and N. Turko (1999), Bouvet Triple Junction in the South Atlantic: Geology and evolution, J. Geophys. Res., 104(B12), 29,365-29,386.
59. Lin, J., G. M. Purdy, H. Schouten, J. C. Sempéré, and C. Zervas (1990), Evidence from gravity data for focused magmatic accretion along the Mid-Atlantic Ridge, Nature, 344, 627-632.
60. Livermore, R. A., and R. J. Hunter (1996), Mesozoic seafloor spreading in the southern Weddell Sea, Geol. Soc. Spec. Publ., 108(1), 227-241.
61. Mahoney, J., J. H. Natland, W. M. White, R. Poreda, S. H. Bloomer, R. L. Fisher, and A. N. Baxter (1989), Isotopic and geochemical provinces of the western Indian Ocean spreading centers, J. Geophys. Res., 94(B4), 4033-4052.
62. Mahoney, J., A. P. LeRoex, Z. Peng, R. L. Fisher, and J. H. Natland (1992), Southwestern limits of Indian Ocean ridge mantle and origin of low 206Pb/204Pb mid-ocean ridge basalt: Isotope systematics of the Central Southwest Indian Ridge (17°-50°E), J. Geophys. Res., 97(B13), 19,771-19,790.
63. Marks, K. M., and A. A. Tikku (2001), Cretaceous reconstructions of East Antarctica, Africa and Madagascar, Earth Planet. Sci. Lett., 186, 479-495.
64. McAdoo, D., and K. M. Marks (1992), Gravity fields from Geosat and ERS-1 satellite altimetry for geodynamic applications, Eos Trans. AGU, 73, 133.
65. Mendel, V., and D. Sauter (1997), Seamount volcanism at the superslow spreading Southwest Indian Ridge between 57°E and 70°E, Geology, 25(2), 99-102.
66. Mendel, V., D. Sauter, L. Parson, and J.-R. Vanney (1997), Segmentation and morphotectonic variations along a super-slow spreading center: the Southwest Indian Ridge (57°E-70°E), Mar. Geophys. Res., 19, 505-533.
67. Mendel, V., D. Sauter, P. Patriat, and M. Munschy (2000), Relationship of the Central Indian Ridge segmentation with the evolution of the Rodrigues triple junction for the past 8 Ma, J. Geophys. Res., 105(B7), 16,563-16,576.
68. Mendel, V., D. Sauter, C. Rommevaux-Jestin, P. Patriat, F. Lefebvre, and L. M. Parson (2003), Magmato-tectonic cyclicity at the ultra-slow spreading Southwest Indian Ridge: Evidence from variations of axial volcanic ridge morphology and abyssal hills pattern, Geochem. Geophys. Geosyst., 4(5), 9102, doi:10.1029/2002GC000417.
69. Mendel, V., M. Munschy, and D. Sauter (2005), MODMAG, a MATLAB program to model marine magnetic anomalies, Comput.Geosci., 31, 589-597.
70. Mével, C., et al. (1997), Sampling the Southwest Indian Ridge: First results of the EDUL cruise (R/V Marion Dufresne II, August 1997), InterRidge News, 6(2), 25-26.
71. Meyzen, C. M., M. J. Toplis, E. Humler, J. N. Ludden, and C. Mével (2003), A discontinuity in mantle composition beneath the southwest Indian Ridge, Nature, 421, 731-733.
72. Meyzen, C. M., J. N. Ludden, E. Humler, B. Luais, M. J. Toplis, C. Mével, and M. Storey (2005), New insights into the origin and distribution of the DUPAL isotope anomaly in the Indian Ocean mantle from MORB of the Southwest Indian Ridge, Geochem. Geophys. Geosyst., 6(11), Q11K11, doi:10.1029/2005GC000979.
73. Meyzen, C. M., J. Blichert-Toft, J. N. Ludden, E. Humler, C. Mével, and F. Albarède (2007), Isotopic portrayal of the Earth's upper mantle flow field, Nature, 447, 1069-1074.
74. Michard, A., R. Montigny, and R. Schlich (1986), Geochemistry of the mantle beneath the Rodriguez Triple Junction and the South-East Indian Ridge, Earth Planet. Sci. Lett., 78, 104-114.
75. Minshull, T. A., and R. S. White (1996), Thin crust on the flanks of the slow-spreading Southwest Indian Ridge, Geophys. J. Int., 125, 139-148.
76. Minshull, T. A., M. R. Muller, and R. S. White (2006), Crustal structure of the Southwest Indian Ridge at 66°E: seismic constraints, Geophys. J. Int., 166, 135-147.
77. Mitchell, N. C. (1991a), An evolving ridge system around the Indian Ocean triple junction, Mar. Geophys. Res., 13, 173-201.
78. Mitchell, N. C. (1991b), Distributed extension at the Indian Ocean triple junction, J. Geophys. Res., 96(B5), 8019-8043.
79. Mitchell, N. C., and L. M. Parson (1993), The tectonic evolution of the Indian ocean triple junction, anomaly 6 to present, J. Geophys. Res., 98(B2), 1793-1812.
80. Mitchell, N. C., and R. A. Livermore (1998a), The present configuration of the Bouvet Triple junction, Geology, 26(3), 267-270.
81. Mitchell, N. C., and R. A. Livermore (1998b), Spiess Ridge: An axial high on the slow spreading Southwest Indian Ridge, J. Geophys. Res., 103(B7), 15,457-15,471.
82. Mitchell, N. C., R. A. Livermore, P. Fabretti, and G. Carrara (2000), The Bouvet Triple Junction, 20 to 10 Ma, and extensive transtensional deformation adjacent to the Bouvet and Conrad transforms, J. Geophys. Res., 105(B4), 8279-8296.
83. Montési, L. G. J., and M. D. Behn (2007), Mantle flow and melting underneath oblique and ultraslow mid-ocean ridges, Geophys. Res. Lett., 34, L24307, doi:10.1029/2007GL031067.
84. Muller, M. R., C. J. Robinson, T. A. Minshull, R. S. White, and M. J. Bickle (1997), Thin crust beneath Ocean Drilling Program borehole 735B at the Southwest Indian Ridge?, Earth Planet. Sci. Lett., 148, 93-107.
85. Muller, M. R., T. A. Minshull, and R. S. White (1999), Segmentation and melt supply at the Southwest Indian Ridge, Geology, 27(10), 867-870.
86. Muller, M. R., T. A. Minshull, and R. S. White (2000), Crustal structure of the South West Indian ridge at the Atlantis II Fracture Zone, J. Geophys. Res., 105(B11), 25,809-25,828.
87. Müller, R. D., C. Gaina, A. Tikku, D. Mihut, S. C. Cande, and J. M. Stock (2000), Mesozoic/Cenozoic tectonic events around Australia, in The History and Dynamics of Global Plate Motions,Geophys. Monogr. Ser., vol. 121, edited by M. A. Richards et al., pp. 161-188, AGU, Washington, D. C.
88. Munschy, M., and R. Schlich (1989), The Rodriguez triple junction (Indian Ocean): Structure and evolution for the past one million years, Mar. Geophys. Res., 11, 1-14.
89. Munschy, M., and R. Schlich (1990), Etude géophysique des dorsales de l'océan Indien dans la région du point triple de Rodriguez, Oceanologica Acta, 10, 119-128.
90. Natland, J. H., and H. J. B. Dick (2001), Formation of the lower oceanic crust and the crystallization of gabbroic cumulates at a very slowly spreading ridge, J. Volcanol. Geotherm. Res., 110, 191-233.
91. Niu, Y., and M. J. O'Hara (2008), Global correlations of ocean ridge basalt chemistry with axial depth: A new perspective, J. Petrol., 49(4), 633-664.
92. Parson, L., E. Gràcia, D. Coller, C. German, and D. Needham (2000), Second order segmentation; the relationship between volcanism and tectonism at the MAR, 38°-35°40'N, Earth Planet. Sci. Lett., 178, 231-251.
93. Parson, L. M., D. Sauter, V. Mendel, P. Patriat, and R. C. Searle (1997), Evolution of the axial geometry of the southwest Indian Ocean ridge between the Melville Fracture Zone and the Indian Ocean Triple Junction-Implications for segmentation on very slow-spreading ridges, Mar. Geophys. Res., 19, 535-552.
94. Patriat, P., and V. Courtillot (1984), On the stability of the triple junctions and its relation to episodity in spreading, Tectonics, 3, 317-332.
95. Patriat, P., and L. M. Parson (1989), A survey of the Indian Ocean triple junction trace within the Antarctic plate implications for the junction evolution since 15 Ma, Mar. Geophys. Res., 11, 89-100.
96. Patriat, P., and J. Segoufin (1988), Reconstruction of the Central Indian Ocean, Tectonophysics, 155, 211-234.
97. Patriat, P., J. Segoufin, J. Goslin, and P. Beuzart (1985), Relative positions of Africa and Antarctica in the Upper Cretaceous: Evidence from non-stationary behaviour of fracture zones, Earth Planet. Sci. Lett., 75, 204-214.
98. Patriat, P., D. Sauter, M. Munschy, and L. M. Parson (1997), A survey of the Southwest Indian Ridge axis between Atlantis II Fracture Zone and the Indian Triple Junction: Regional setting and large scale segmentation, Mar. Geophys. Res., 19, 457-480.
99. Patriat, P., H. Sloan, and D. Sauter (2008), From slow to ultra-slow: A previously undetected event at the Southwest Indian Ridge at ~24Ma, Geology, 36(3), 207-210.
100. Phipps Morgan, J., E. Parmentier, and J. Lin (1987), Mechanisms for the origin of mid-ocean ridge axial topography: Implications for the thermal and mechanical structure of accreting plate boundaries, J. Geophys. Res., 92(B12), 12,823-12,836.
101. Price, R. C., A. K. Kennedy, M. Riggs-Sneeringer, and F. A. Frey (1986), Geochemistry of basalts from the Indian Ocean triple junction: Implications for the generation and evolution of Indian Ocean ridge basalts, Earth Planet. Sci. Lett., 78, 379-396.
102. Raitt, R. W. (1963), The crustal rocks, in The Sea, edited by M. N. Hill, pp. 85-102, Wiley-Interscience, New York.
103. Ravilly, M., J. Dyment, P. Gente, and R. Thibaud (1998), Axial magnetic anomaly amplitude along the Mid-Atlantic Ridge between 20°N and 40°N, J. Geophys. Res., 103(B10), 24,201-24,221.
104. Reid, I., and H. R. Jackson (1981), Oceanic spreading rate and crustal thickness, Mar. Geophys. Res., 5, 165-172.
105. Robinson, C. J., M. J. Bickle, T. A. Minshull, R. S. White, and A. R. L. Nichols (2001), Low degree melting under the Southwest Indian Ridge: The roles of mantle temperature, conductive cooling and wet melting, Earth Planet. Sci. Lett., 188, 383-398.
106. Rommevaux-Jestin, C., C. Deplus, and P. Patriat (1997), Mantle Bouguer anomaly along a super-slow spreading ridge: Comparison with central Mid-Atlantic ridge and implications on the accretionary process, Mar. Geophys. Res., 19, 481-503.
107. Royer, J. Y., P. Patriat, H. W. Bergh, and C. R. Scotese (1988), Evolution of the Southwest Indian Ridge from the late cretaceous (anomaly 34) to the middle Eocene (anomaly 20), Tectonophysics, 155, 235-260.
108. Royer, J. Y., R. G. Gordon, and B. C. Horner-Johnson (2006), Motion of Nubia relative to Antarctica since 11 Ma: Implications for Nubia-Somalia, Pacific-North America, and India-Eurasia motion, Geology, 34(6), 501-504.
109. Salters, V. J. M., and H. J. B. Dick (2002), Mineralogy of the midocean-ridge basalt source from neodymium isotopic composition of abyssal peridotites, Nature, 418, 68-72.
110. Sandwell, D. T., and W. H. F. Smith (1997), Marine gravity anomaly from Geosat and ERS-1 satellite altimetry, J. Geophys. Res., 102(B5), 10,039-10,054.
111. Sauter, D., and V. Mendel (1997), Variations in backscatter strength along the super slow-spreading Southwest Indian Ridge between 57°E and 70°E, Mar. Geol., 140, 237-248.
112. Sauter, D., V. Mendel, C. Rommevaux-Jestin, P. Patriat, and M. Munschy (1997), Propagation of the South West Indian Ridge at the Rodrigues triple junction, Mar. Geophys. Res., 19, 553-567.
113. Sauter, D., P. Patriat, C. Rommevaux-Jestin, M. Cannat, A. Briais, and the Gallieni Shipboard and Scientific Party (2001), The Southwest Indian Ridge between 49°15'E and 57°E: Focused accretion and magma redistribution, Earth Planet. Sci. Lett., 192, 303-317.
114. Sauter, D., L. M. Parson, V. Mendel, C. Rommevaux-Jestin, O. Gomez, A. Briais, C. Mével, K. Tamaki, and F. S. team (2002), TOBI sidescan sonar imagery of the very slow-spreading Southwest Indian Ridge: Evidence for along-axis magma distribution, Earth Planet. Sci. Lett., 199, 81-95.
115. Sauter, D., H. Carton, V. Mendel, M. Munschy, C. Rommevaux-Jestin, J.-J. Schott, and H. Whitechurch (2004a), Ridge segmentation and the magnetic structure of the Southwest Indian Ridge (at 55°30'E, 55°30'E and 66°20'E): Implications for magmatic processes at ultraslow-spreading centers, Geochem. Geophys. Geosyst., 5, Q05K08, doi:10.1029/2003GC000581.
116. Sauter, D., V. Mendel, C. Rommevaux-Jestin, L. M. Parson, H. Fujimoto, C. Mével, M. Cannat, and K. Tamaki (2004b), Focused magmatism versus amagmatic spreading along the ultra-slow spreading Southwest Indian Ridge: Evidence from TOBI side scan sonar imagery, Geochem. Geophys. Geosyst., 5, Q10K09, doi:10.1029/2004GC000738.
117. Sauter, D., M. Cannat, and V. Mendel (2008), Magnetization of 0-26.5 Ma seafloor at the ultraslow spreading Southwest Indian Ridge 61-67°E, Geochem. Geophys. Geosyst., 9, Q04023, doi:10.1029/2007GC001764.
118. Sauter, D., M. Cannat, C. Meyzen, A. Bezos, P. Patriat, E. Humler, and E. Debayle (2009), Propagation of a melting anomaly along the ultra-slow Southwest Indian Ridge between 46°E and 52°20'E: Interaction with the Crozet hot-spot?, Geophys. J. Int., in press.
119. Sclater, J. G., H. Dick, I. O. Norton, and D. Woodroffe (1978), Tectonic structure and petrology of Antarctic plate boundary near the Bouvet Triple Junction, Earth Planet. Sci. Lett., 37, 393-400.
120. Sclater, J. G., R. L. Fisher, P. Patriat, C. R. Tapscott, and B. Parsons (1981), Eocene to recent development of the south-west Indian Ridge, a consequence of the evolution of the Indian Ocean triple junction, Geophys. J. R. Astron. Soc., 64, 587-604.
121. Sclater, J. G., N. R. Grindlay, J. A. Madsen, and C. Rommevaux-Jestin (2005), Tectonic interpretation of the Andrew Bain transform fault: Southwest Indian Ocean, Geochem. Geophys. Geosyst., 6, Q09K10, doi:10.1029/2005GC000951.
122. Searle, R. C., and A. Bralee (2007), Asymmetric generation of oceanic crust at the ultra-slow spreading Southwest Indian Ridge, 64°E, Geochem. Geophys. Geosyst., 8, Q05015, doi:10.1029/2006GC001529.
123. Searle, R. C., K. Fujioka, M. Cannat, C. Mével, H. Fujimoto, and L. M. Parson (1999), FUJI Dome: A large detachment fault near 64°E on the very slow spreading South West Indian Ridge, Eos Trans. AGU, 80(46), Fall Meet. Suppl., Abstract F956.
124. Ségoufin, J., and P. Patriat (1980), Existence d'anomalies mesozoiques dans le basin de Somalie. Implications pour les relations Afrique-Antarctique-Madagascar, C. R. Seances Acad. Sci., Ser. B, 291, 85-88.
125. Seyler, M., M. Cannat, and C. Mével (2003), Evidence for majorelement heterogeneity in the mantle source of abyssal peridotites from the Southwest Indian Ridge (52° to 69°E), Geochem. Geophys. Geosyst., 4(2), 9101, doi:10.1029/2002GC000305.
126. Seyler, M., J. P. Lorand, M. J. Toplis, and G. Godard (2004), Asthenospheric metasomatism beneath the mid-ocean ridge: Evidence from depleted abyssal peridotites, Geology, 32(4), 301-304.
127. Simonov, V. A., A. A. Peyve, V. Y. Kolobov, A. A. Milosnov, and S. V. Kovyazin (1996), Magmatic and hydrothermal processes in the Bouvet Triple Junction Region (South Atlantic), Terra Nova, 8(5), 415-424.
128. Sleep, N. H. (1975), Formation of ocean crust: Some thermal constraints, J. Geophys. Res., 80(29), 4037-4042.
129. Smith, D. K., J. R. Cann, and J. Escartin (2006), Widespread active detachment faulting and core complex formation near 13°N on the Mid-Atlantic Ridge, Nature, 442, 440-443.
130. Smith, D. K., J. Escartín, H. Schouten, and J. R. Cann (2008), Fault rotation and core complex formation: Significant processes in seafloor formation at slow-spreading mid-ocean ridges (Mid-Atlantic Ridge, 13°-15°N), Geochem. Geophys. Geosyst., 9, Q03003, doi:10.1029/2007GC001699.
131. Sparks, D. W., and E. M. Parmentier (1991), Melt extraction from the mantle beneath spreading centers, Earth Planet. Sci. Lett., 105, 368-377.
132. Stamps, D. S., E. Calais, E. Saria, C. Hartnady, J.-M. Nocquet, C. J. Ebinger, and R. M. Fernandes (2008), A kinematic model for the East African Rift, Geophys. Res. Lett., 35, L05304, doi:10.1029/2007GL032781.
133. Standish, J. J., H. J. B. Dick, P. J. Michael, W. G. Melson, and T. O'Hearn (2008), MORB generation beneath the ultraslowspreading Southwest Indian Ridge (9°-25° E): Major element chemistry and the importance of process versus source, Geochem. Geophys. Geosyst., 9, Q05004, doi:10.1029/2008GC001959.
134. Tucholke, B. E., J. Lin, and M. C. Kleinrock (1998), Megamullions and mullion structure defining oceanic metamorphic core complexes on the Mid-Atlantic Ridge, J. Geophys. Res., 103(B5), 9857-9866.
135. Tucholke, B. E., M. D. Behn, W. R. Buck, and J. Lin (2008), Role of melt supply in oceanic detachment faulting and formation of megamullions, Geology, 36(6), 455-458.
136. Wang, X., and J. R. Cochran (1995), Along-axis gravity gradients at mid-ocean ridges: Implications for mantle flow and axial morphology, Geology, 23(1), 29-32.
137. Wessel, P., and W. H. F. Smith (1995), New version of Generic Mapping Tools released, Eos Trans. AGU, 76, 329.
138. West, B. P., H. Fujimoto, C. Honsho, K. Tamaki, and J.-C. Sempéré (1995), A three-dimensional study of the Rodrigues triple junction and Southwest Indian Ridge, Earth Planet. Sci. Lett., 133, 175-184.
139. White, R. S., T. A. Minshull, M. J. Bickle, and C. J. Ronbinson (2001), Melt generation at very slow-spreading oceanic ridges: Constraints from geochemical and geophysical data, J. Petrol., 42(6), 1171-1196.