Seismic evidence for a global low-velocity layer within the Earth's upper mantle

Nature Geoscience

Volumn 3, Issue 10, 2010, Pages 718-721

  Tauzin, Benoît ^a   Debayle, Eric ^b   Wittlinger, Gérard ^c  

^a UTRECHT UNIVERSITY   (Netherlands)

^b UNIVERSITÉ LYON 1   (France)

^c CNRS   (France)

Author keywords

[No Author keywords available]

Indexed keywords

DEHYDRATION; GEOCHEMICAL SURVEY; GEOPHYSICS; MANTLE PLUME; MELTING; MINERAL; NUMERICAL MODEL; SEISMIC ANISOTROPY; SEISMIC WAVE; SILICATE; TRANSFORMATION; TRANSITION ZONE; UPPER MANTLE; VELOCITY;

EID: 77957585280     PISSN: 17520894     EISSN: 17520908     Source Type: Journal    
DOI: 10.1038/ngeo969     Document Type: Article

References (30)

1. Revenaugh, J. & Sipkin, S. Seismic evidence for silicate melt atop the 410-km discontinuity. Nature 369, 474-476 (1994).
2. Vinnik, L. & Farra, V. Low velocity atop the 410-km discontinuity and mantle plumes. Earth Planet. Sci. Lett. 262, 398-412 (2007).
3. Bercovici, D. & Karato, S. Whole mantle convection and transition-zone water filter. Nature 425, 39-44 (2003).
4. Leahy, G. M. & Bercovici, D. On the dynamics of a hydrous melt layer above the transition zone. J. Geophys. Res. 112, B07401 (2007).
5. Dasgupta, E. & Hirschmann, M. Melting in the Earth's deep upper mantle caused by carbon dioxide. Nature 440, 659-662 (2006).
6. Wang, W. & Takahashi, E. Subsolidus and melting experiments of K-doped peridotite KLB-1 to 27 GPa: Its geophysical and geochemical implications. J. Geophys. Res. 105, 2855-2868 (2000).
7. Suzuki, A. & Ohtani, E. Density of peridotite melts at high pressure. Phys. Chem. Mineral. 30, 449-456 (2003).
8. Matsukage, K., Jing, Z. & Karato, S. Density of Hydrous silicate melt at the condition of Earth's deep upper mantle. Nature 438, 488-491 (2005).
9. Song, T., Helmberger, D. & Grand, S. Low-velocity zone atop the 410-km seismic discontinuity in the northwestern United States. Nature 427, 530-533 (2004).
10. Vinnik, L., Ren, Y., Stutzmann, E., Farra, V. & Kiselev, S. Observations of S410p and S350p at seismograph stations in California. J. Geophys. Res. 115, B05303 (2010).
11. Schaeffer, A. J. & Bostock, M. G. A low-velocity zone atop the transition zone in Northwestern Canada. J. Geophys. Res. 115, B06302 (2010).
12. Vinnik, L. & Farra, V. Subcratonic low-velocity layer and flood basalts. Geophys. Res. Lett. 29, 1049-1052 (2002).
13. Vinnik, L., Kumar, M., Kind, R. & Farra, V. Super-deep low velocity layer beneath the Arabian plate. Geophys. Res. Lett. 30, 1415-1418 (2003).
14. Fee, D. & Dueker, K. Mantle transition zone topography and structure beneath the Yellowstone hotspot. Geophys. Res. Lett. 31, L18603 (2004).
15. Jasbinsek, J. & Dueker, K. Ubiquitous low-velocity layer atop the 410-km discontinuity in the northern Rocky Mountains. Geochem. Geophys. Geosys. 8, Q10004 (2007).
16. Wittlinger, G. & Farra, V. Converted waves reveal a thick and layered tectosphere beneath the Kalahari super-craton. Earth Planet. Sci. Lett. 254, 404-415 (2007).
17. Bagley, B., Courtier, A. & Revenaugh, J. Melting in the deep upper mantle oceanward of the Honshu slab. Phys. Earth Planet. Inter. 175, 137-144 (2009).
18. Gao, W., Matzel, E. & Grand, S. Upper mantle structure beneath eastern Mexico determined from P and S waveform inversion and its implications. J. Geophys. Res. 111, B08307 (2006).
19. Obayashi, M., Sugioka, H., Yoshimitsu, J. & Fukao, Y. High temperature anomalies oceanward of subducting slabs at the 410-km discontinuity. Earth Planet. Sci. Lett. 239, 9-17 (2006).
20. Tauzin, B., Debayle, E. & Wittlinger, G. The mantle transition zone as seen by global Pds phases: No clear evidence for a thin transition zone beneath hotspots. J. Geophys. Res. 113, B08309 (2008).
21. Kennett, B. L. N. & Engdahl, E. R. Travel times for global earthquake location and phase identification. Geophys. J. Int. 105, 429-465 (1991).
22. Revenaugh, J. & Jordan, T. Mantle layering from ScS reverberations : 3. The upper mantle. J. Geophys. Res. 96, 19781-19810 (1991).
23. Rychert, C. A. & Shearer, P. M. A global view of the lithosphere-asthenosphere boundary. Science 324, 495-498 (2009).
24. Jordan, T. H. Global tectonic regionalization for seismological data analysis. Bull. Seismol. Soc. Am. 71, 1131-1141 (1981).
25. 4. Contrib. Mineral. Petrol. 123, 345-357 (1996).
26. Demouchy, S., Deloule, E., Frost, D. & Keppler, H. Pressure and temperature-dependence of water solubility in iron-free wadsleyite. Am. Mineral. 90, 1048-1091 (2005).
27. Blackman, D. K. & Kendall, J. M. Sensitivity of teleseismic body waves to mineral texture and melt in the mantle beneath a mid-ocean ridge. Phil. Trans. R. Soc. Lond. 355, 217-231 (1997).
28. Hier-Majumder, S., Ricard, Y. & Bercovici, D. Role of grain boundaries in magma migration and storage. Earth Planet. Sci. Lett. 248, 735-749 (2006).
29. Debayle, E., Kennett, B. & Priestley, K. Global azimuthal seismic anisotropy and the unique plate-motion deformation of Australia. Nature 433, 509-512 (2005).
30. Efron, B. & Tibshirani, R. Statistical data analysis in the computer age. Science 253, 390-395 (1991).