A discontinuity in mantle composition beneath the southwest Indian ridge

Nature

Volumn 421, Issue 6924, 2003, Pages 731-733

  Meyzen, Christine M ^a,c   Toplis, Michael J ^a   Humler, Eric ^b   Ludden, John N ^a   Mével, Catherine ^b  

^a CRPG CNRS   (France)

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

^c DANISH LITHOSPHERE CENTRE   (Denmark)

Author keywords

[No Author keywords available]

Indexed keywords

BASALT; DREDGING; MELTING; RARE EARTH ELEMENTS; SEISMIC WAVES;

RIDGE TOPOGRAPHY;

SEISMOLOGY;

ALUMINUM OXIDE; CALCIUM OXIDE; GLASS; LANTHANIDE; SODIUM; STRONTIUM; TITANIUM DIOXIDE;

DISCONTINUITY; IGNEOUS GEOCHEMISTRY; MANTLE CHEMISTRY; MID-OCEAN RIDGE BASALT; OCEANIC CRUST; SEISMIC VELOCITY;

ARTICLE; BASALT; CHEMICAL COMPOSITION; CORRELATION ANALYSIS; DYNAMICS; GEOCHEMISTRY; GEODYNAMICS; INDIAN OCEAN; MATHEMATICAL MODEL; MELTING POINT; OCEAN ENVIRONMENT; PRIORITY JOURNAL; TOPOGRAPHY;

INDIAN OCEAN;

EID: 0037434771     PISSN: 00280836     EISSN: None     Source Type: Journal    
DOI: 10.1038/nature01424     Document Type: Article

References (23)

1. Klein, E. M. & Langmuir, C. H. Global correlations of ocean ridge basalt chemistry with axial depth and crustal thickness. J. Geophys. Res. 92, 8089-8115 (1987).
2. Langmuir, C. H., Klein, E. M. & Plank, T. in Mantle Flow and Melt Generation at Mid-Ocean Ridges (eds Phipps-Morgan, J., Blackmann, D. K. & Sinton, J. M.) 183-280 Geophysical Monograph series, Vol. 71 (American Geophysical Union, Washington DC, 1992).
3. Humler, E., Thirot, J. L. & Montagner, J. P. Global correlations of mid-ocean-ridge basalt chemistry with seismic tomographic images. Nature 364, 225-228 (1993).
4. Cannat, M., Rommevaux-Jestin, C., Sauter, D., Deplus, C. & Mendel, V. Formation of the axial relief at the very slow spreading Southwest Indian Ridge (49°-69°E). J. Geophys. Res. 104, 22825-22843 (1999).
5. Debayle, E. & Levêque, J. J. Upper mantle heterogeneities in the Indian Ocean from waveform inversion. Geophys. Res. Lett. 24, 245-248 (1997).
6. Muller, M. R., Minshull, T. A. & White, R. S. Segmentation and melt supply at the Southwest Indian Ridge. Geology 27, 867-870 (1999).
7. Shu, D. & Gordon, R. G. Evidence for motion between Nubia and Somalia along the Southwest Indian Ridge. Nature 398, 64-66 (1999).
8. Schilling, J. G. et al. Thermal structure of the mantle beneath the Equatorial Mid-Atlantic Ridge: Inferences from the spatial variation of dredged basalt glass compositions. J. Geophys. Res. 100, 10057-10076 (1995).
9. Bryan, W. B., Humphris, S. E., Thompson, G. & Casey, J. F. Comparative volcanology of small axial eruptive centers in the MARK area. J. Geophys. Res. 99, 2973-2984 (1994).
10. Natland, J. H. in Oceanic Basalts (ed. Floyd, P. A.) 288-310 (Blackie and Son, Glasgow, 1991).
11. Elthon, D., Ross, D. K. & Meen, J. K. Compositional variations of basaltic glasses from the Mid-Cayman Rise spreading center. J. Geophys. Res. 100, 12497-12512 (1995).
12. Elthon, D., Ross, D. K. & Meen, J. K. Correction to "Compositional variations of basaltic glasses from the Mid-Cayman Rise spreading center". J. Geophys. Res. 101, 17577-17579 (1996).
13. Klein, E. M., Langmuir, C. H. & Staudigel, H. Geochemistry of basalts from the Southeast Indian Ridge 115°-138°E. J. Geophys. Res. 96, 2089-2107 (1991).
14. Pyle, D. G., Christie, D. M., Mahoney, J. J. & Duncan, R. A. Geochemistry and geochronology of ancient southeast Indian and southwest Pacific seafloor. J. Geophys. Res. 100, 22261-22282 (1995).
15. Pyle, D. G. Geochemistry of Mid-ocean Ridge Basalt Within and Surrounding the Australian-Antarctic Discordance. Thesis, Oregon State Univ. (1994).
16. White, R. S., Minshull, T. A., Bickle, M. J. & Robinson, C. J. Melt generation at very slow-spreading oceanic ridges: Constraints from geochemical and geophysical data. J. Petrol. 42, 1171-1196 (2001).
17. Robinson, C. J., Bickle, M. J., Minshull, T. A., White, R. S. & Nichols, A. R. L. 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 (2001).
18. Pickering-Witter, J. & Johnston, A. D. The effects of variable bulk composition on the melting systematics of fertile peridotitic assemblages. Contrib. Mineral. Petrol. 140, 190-211 (2000).
19. 2O-undersaturated conditions: Implications for the petrogenesis of high-Ca boninites and influence of subduction components on mantle melting. J. Petrol. 41, 257-283 (2000).
20. Seyler, M., Cannat, M. & Mével, C. Evidence for major-element heterogeneity in the mantle source of abyssal peridotites from the Southwest Indian Ridge (52° to 68°E). Geochem. Geophys. Geosyst. (in the press).
21. Smith, W. H. F. & Sandwell, D. T. Global seafloor topography from satellite altimetry and ship depth soundings. Science 277, 1957-1962 (1997).
22. Patriat, P., Sauter, D., Munschy, M. & Parson, L. A survey of the Southwest Indian Ridge axis between Atlantis P fracture zone and the Indian Ocean triple junction: regional setting and large-scale segmentation. Mar. Geophys. Res. 19, 457-480 (1997).
23. Plank, T. & Langmuir, C. H. Effects of the melting regime on the composition of the oceanic crust. J. Geophys. Res. 97, 19749-19770 (1992).