3D effects of sharp boundaries at the borders of the African and Pacific Superplumes: Observation and modeling

Earth and Planetary Science Letters

Volumn 233, Issue 1-2, 2005, Pages 137-153

  To, Akiko ^a   Romanowicz, Barbara ^a   Capdeville, Yann ^b   Takeuchi, Nozomu ^c  

^a UNIVERSITY OF CALIFORNIA   (United States)

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

^c UNIVERSITY OF TOKYO   (Japan)

Author keywords

D region; Low velocity structure; Sdiff; Super plume

Indexed keywords

SHDIFF WAVEFORMS; SHEAR VELOCITY; SUPERPLUMES; THREE-DIMENSIONAL (3D) EFFECTS;

GEOLOGIC MODELS; THERMAL PLUMES; TOMOGRAPHY; VELOCITY MEASUREMENT; WAVEFORM ANALYSIS;

EARTH ATMOSPHERE;

CONVECTION; MANTLE; MANTLE CONVECTION; MANTLE PLUME;

BAUHINIA GALPINII;

EID: 17044431710     PISSN: 0012821X     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.epsl.2005.01.037     Document Type: Article

References (31)

1. S.P. Grand Mantle shear-wave tomography and the fate of the subducted slabs Phil. Trans. R. Soc. Lond. 360 2002 475-2491
2. Y.J. Gu A.M. Dziewonski W.J. Su G. Ekstrm Models of the mantle shear velocity and discontinuities in the pattern of lateral heterogeneities J. Geophys. Res. 106 2001 11169-11199
3. C. Mégnin B. Romanowicz The three-dimensional shear velocity structure of the mantle from the inversion of body, surface and higher-mode waveforms Geophys. J. Int. 143 2000 709-728
4. G. Masters G. Laske H. Bolton A.M. Dziewonski The relative behavior of shear velocity, bulk sound speed, and compressional velocity in the mantle: Implications for chemical and thermal structure in: S. Karato A. Forte R. Liebermann G. Masters L. Stixrude (Eds.) Earth's Deep Interior: Mineral Physics and Tomography from the Atomic to the Global Scale, Geophysical Monograph 17 2000 AGU Washington, DC 63-87
5. J. Ritsema H.J. van Heijst J.H. Woodhouse Complex shear wave velocity structure imaged beneath Africa and Iceland Science 286 1999 1925-1928
6. S. Tanaka Very low shear wave velocity at the base of the mantle under the South Pacific superswell Earth Planet. Sci. Lett. 203 2002 879-893
7. E.J. Garnero D.V. Helmberger Travel times of S and SKS: Implications for three-dimensional lower mantle structure beneath the central Pacific J. Geophys. Res. 98 1993 8225-8241
8. M.E. Wysession L. Bartko J. Wilson Mapping the lowermost mantle using core-reflected shear waves J. Geophys. Res. 99 1994 13667-13684
9. J. Ritsema S. Ni D.V. Helmberger H.P. Crotwell Evidence for strong shear velocity reductions and velocity gradients in the lower mantle beneath Africa Geophys. Res. Lett. 25 1998 4245-4248
10. M.E. Wysession K.M. Fischer G.I. Al-eqabi P.J. Shore I. Gurari Using MOMA broadband array ScS-S data to image smaller scale structures at the base of the mantle Geophys. Res. Lett. 28 2001 867-870
11. L. Bréger B. Romanowicz C. Ng The pacific plume as seen by S, ScS, and SKS Geophys. Res. Lett. 28 2001 1859-1862
12. L. Wen Seismic evidence for a rapidly varying compositional anomaly at the base of the Earth's mantle beneath the Indian Ocean Earth Planet. Sci. Lett. 194 2001 83-95
13. S. Ni E. Tan M. Gurnis D.V. Helmberger Sharp sides to the African super plume Science 296 2002 1850-1852
14. A.M. Dziewonski D.L. Anderson Preliminary reference Earth model Phys. Earth Planet. Inter. 25 1981 297-356
15. Sidao Ni, D.V. Helmberger, J. Tromp, 3D structure of the African super plume from waveform modeling, Geophys. J. Int. (in press).
16. L. Bréger B. Romanowicz Three-dimensional structure at the base of the mantle beneath the central Pacific Science 282 1998 718-720
17. B. Hager R.W. Clayton M.A. Richards R.P. Comer A.M. Dziewonski Lower mantle heterogeneity, dynamic topography and the geoid Nature 313 1985 541-545
18. S.G. Robertson J.H. Woodhouse Ratio of relative S to P velocity heterogeneity in the lower mantle J. Geophys. Res. 101 1996 20041-20052
19. W.J. Su A.M. Dziewonski Simultaneous inversion for 3-D variations in shear and bulk velocity in the mantle Phys. Earth Planet. Inter. 100 1997 135-156
20. M. Ishii J. Tromp Normal-mode and free-air gravity constraints on lateral variations in velocity and density of the Earth's mantle Science 285 1999 1231-1236
21. G. Schubert G. Masters P. Olson P. Tackley Superplumes or plume clusters? Phys. Earth Planet. Inter. 146 2004 147-162
22. Y. Capdeville Méthode couplée éléments spectraux-solution modale pour la propagation d'ondes dans la Terre á l'échelle globale Thèse vol. 7 2000 Université Paris
23. Y. Capdeville E. Chaljub J.P. Vilotte J.P. Montagner Coupling the spectral element method with a modal solution for elastic wave propagation in global earth models Geophys. J. Int. 152 2002 34-66
24. Y. Capdeville A. To B. Romanowicz Coupling spectral elements and modes in a spherical earth: An extension to the "sandwich" case Geophys. J. Int. 154 2003 44-57
25. A. To Y. Capdeville B. Romanowicz Waveform modeling of 3D structure of D″ region using a coupled SEM/Normal Mode Approach Fall '03 meeting abstract EOS Trans A. G. U. 2003 S31D-0787
26. B.L.N. Kennett O. Gudmundsson Ellipticity corrections for seismic phases Geophys. J. Int. 127 1996 40-48
27. M. Panning B. Romanowicz Inference on flow at the base of Earth's mantle based on seismic anisotropy Science 303 2004 351-353
28. X.F. Liu J. Tromp A.M. Dziewonski Is there a first-order discontinuity in the lowermost mantle? Earth Planet. Sci. Lett. 160 1998 343-351
29. V.F. Cormier Some problems with S, SKS and ScS observations and implications for the structure of the base of the mantle and outer core J. Geophys. 57 1985 14-22
30. R.A.W. Haddon G.G.R. Buchbinder Wave propagation effects and the Earth's structure in the lower mantle Geophys. Res. Lett. 13 1986 1489-1492
31. L. Bréger B. Romanowicz L. Vinnik Tests of tomographic models in D″ using differential travel times Geophys. Res. Lett. 25 1998 5-8