Thin crust on the flanks of the slow-spreading Southwest Indian Ridge

Geophysical Journal International

Volumn 125, Issue 1, 1996, Pages 139-148

  Minshull, T A ^a   White, R S ^a  

^a UNIVERSITY OF CAMBRIDGE   (United Kingdom)

Author keywords

Crustal structure; Mid ocean ridges; Oceanic crust; Seismic refraction; Southwest Indian Ridge

Indexed keywords

CRUSTAL STRUCTURE; MID OCEAN RIDGE; MID-OCEAN RIDGES; OCEANIC CRUST; SEAFLOOR SPREADING; SEISMIC REFRACTION; THIN CRUST;

INDIAN OCEAN, SOUTHWEST INDIAN RIDGE;

EID: 0029750628     PISSN: 0956540X     EISSN: None     Source Type: Journal    
DOI: 10.1111/j.1365-246X.1996.tb06541.x     Document Type: Article

References (37)

1. Bassias, Y. & Triboulet, C., 1992. Petrology and P-T-t evolution of the South West Indian Ridge peridotites, A case study: east of the Melville Fracture Zone at 62°E, Lithos, 28, 1-19.
2. Bown, J.W. & White, R.S., 1994. Variation of oceanic crustal thickness with spreading rate, Earth planet. Sci. Lett., 121, 435-449.
3. Bown, J.W. & White, R.S., 1995. The effect of finite extension rate on melt generation at rifted continental margins, J. geophys. Res., 100, 18011-18029.
4. Cande, S.C. & Kent, D.V., 1995. Revised calibration of the geomagnetic polarity timescale for the Late Cretaceous and Cenozoic, J. geophys. Res., 100, 6093-6095.
5. Castagna, J.P., Batzle, M.L. & Eastwood, R.L., 1985. Relationships between compressional-wave and shear-wave velocities in clastic silicate rocks, Geophysics, 50, 571-581.
6. Christensen, N.I., 1966. Elasticity of ultrabasic rocks, J. geophys. Res., 71, 5921-5931.
7. Cordery, M.J. & Phipps Morgan, J., 1993. Convection and melting at mid-ocean ridges, J. geophys. Res., 98, 19477-19504.
8. Dick, H.J.B., 1989. Abyssal peridotites, very slow spreading ridges and ocean ridge magmatism, Spec. Publ. Geol. Soc. Lond., 42, 71-105.
9. Fisher, R.L. & Sclater, J.G., 1983. Tectonic evolution of the Southwest Indian Ocean since the Mid-Cretaceous: plate motions and stability of the pole of Antarctica/Africa for at least 80 Myr, Geophys J. R. astr. Soc., 73, 553-576.
10. Francis, T.J.G. & Raitt, R. W., 1967. Seismic refraction measurements in the southern Indian Ocean, J. geophys. Res., 72, 3015-3041.
11. Harland, W.B., Armstrong, R., Cox, A., Craig, L., Smith, A. & Smith, D, 1990. A Geologic Time Scale 1989, Cambridge University Press, New York, NY.
12. Houtz, R. & Ewing, J., 1976. Upper crustal structure as a function of plate age, J. geophys. Res., 81, 2490-2498.
13. Marks, K.M., McAdoo, D.C. & Smith, W.H.F., 1993. Mapping the Southwest Indian Ridge with Geosat, EOS Trans, Am. geophys. Un., 74, 81-86.
14. McKenzie, D.P. & Bickle, M.J., 1988. The volume and composition of melt generated by extension of the lithosphere, J. Petrol., 29, 625-679.
15. Minshull, T.A., 1993. Poisson's ratio of a seaward-dipping reflector series, Hatton Bank, Geophys. J. Int., 115, 332-335.
16. Minshull, T.A., White, R.S, Mutter, J.C., Buhl, P., Detrick, R.S., Williams, C.A. & Morris, E., 1991. Crustal structure at the Blake Spur Fracture Zone from expanding spread profiles, J. geophys. Res., 96, 9955-9984.
17. Mitchell, N.C., 1991. An evolving ridge system around the Indian Ocean Triple Junction, Mar. geophys. Res., 13, 173-201.
18. Mitchell, N.C. & Parson, L.M., 1993. The tectonic evolution of the Indian Ocean Triple Junction, anomaly 6 to present, J. geophys. Res., 98, 1793-1812.
19. Müller, S., Stein, A. & Vees, R., 1962. Seismic scaling laws for explosions on a fake bottom, Z. Geophys, 28, 258-280.
20. Neprochnov, Y., Yel'nikov, I.N. & Kholopov, B.V., 1967. Structure of the Earth's crust in the Indian Ocean on the basis of seismic data obtained during the 36th sailing of the 'Vityaz', Dokl Akad. Nauk SSR, 174, 429-432.
21. Patriat, P. & Parson, L., 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.
22. Patriat, P. & Segoufin, J., 1988. Reconstruction of the Central Indian Ocean, Tectonophysics, 155, 211-234.
23. Reid, I. & Jackson, H.R., 1981. Oceanic spreading rate and crustal structure, Mar. geophys. Res., 5, 165-172.
24. Sandmeier, K.-J. & Wenzel, F., 1986. Synthetic seismograms for a complex crustal model, Geophys. Res. Lett., 13, 22-25.
25. Sandwell, D.T., 1986. Thermal stresses and the spacings of transform faults, J. geophys. Res., 91, 6405-6417.
26. Sandwell, D.T. & Smith, W.H.F., 1992. Global marine gravity from ERS-1, Geosat and Seasat reveals new tectonic fabric, EOS Trans. Am. geophys. Un. Fall Meeting Suppi, 73, 133.
27. Sclater, J.G., Fisher, R.L., Patriat, P., Tapscott, C. & Parsons, B., 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. astr. Soc., 64, 587-604.
28. Scott, D.R., 1992. Small-scale convection and mantle melting beneath mid-ocean ridges, in Mantle Flow and Melt Generation at Mid-Ocean Ridges, Geophys. Monograph Vol. 71, pp. 327-352, eds Phipps Morgan, J., Blackman, D.K. & Sinton, J.M., Am. Geophys. Un., Washington, DC.
29. Shen, Y. & Forsyth, D.W., 1992. The effects of temperature and pressure-dependent viscosity on three-dimensional passive flow of the mantle beneath a ridge-transform system, J. geophys. Res., 97, 19,717-19,728.
30. Skilbeck, J. N., 1975. In the fluid dynamics of ridge crests, in Notes on the 1975 Summer Study Program in Geophysical Fluid Dynamics at the Woods Hole Oceanographic Institution 2, Woods Hole Ocean. Inst. Ref. No. 75-58, 113-122.
31. Sparks, D.W. & Parmentier, E.M., 1993. The structure of three-dimensional convection beneath oceanic spreading centres, Geophys. J. Int., 112, 81-91.
32. Spiegelman, M. & McKenzie, D., 1987. Simple 2-D models for melt extraction at mid-ocean ridges and island arcs, Earth planet. Sci. Lett., 83, 137-152.
33. Spudich, P. & Orcutt, J.A., 1980. Petrology and porosity of an oceanic crustal site: Results from waveform modeling of seismic refraction data, J. geophys. Res., 85, 1409-1433.
34. Su, W. & Buck, W.R., 1992. Buoyancy effects on mantle flow under mid-ocean ridges, J. geophys. Res., 98, 12191-12205.
35. White, R.S. & Bunch, A.W.H., 1979. Explosive sink rates, Geophys. J. R. astr. Soc., 56, 473-476.
36. White, R.S., Detrick, R.S., Sinha, M.C. & Cormier, M.-H., 1984. Anomalous seismic structure of oceanic fracture zones, Geophys. J. R. astr. Soc., 79, 779-798.
37. White, R.S., McKenzie, D.P. & O'Nions, R.K., 1992. Oceanic crustal thickness from seismic measurements and rare earth element inversions, J. geophys. Res., 97, 19683-19715.