A broadband seismic study of the lowermost mantle beneath Mexico: Constraints on ultralow velocity zone elasticity and density

Journal of Geophysical Research: Solid Earth

Volumn 106, Issue B12, 2001, Pages 30809-30820

  Havens, Emily ^a   Revenaugh, Justin ^a  

^a UNIVERSITY OF CALIFORNIA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CORE-MANTLE BOUNDARY; LOWER MANTLE; SEISMIC TOMOGRAPHY; SEISMIC WAVE; STACKING; VELOCITY STRUCTURE;

GULF OF MEXICO; MEXICO;

EID: 0035710507     PISSN: 21699313     EISSN: 21699356     Source Type: Journal    
DOI: 10.1029/2000jb000072     Document Type: Article

References (30)

1. Berryman, J. G., Seismic velocity decrement ratios for regions of partial melt in the lower mantle, Geophys. Res. Lett., 27, 421-424, 2000.
2. Buffett, B., E. Garnero and R. Jeanloz, Sediments at the top of Earth's core, Science, 290, 1338-1342, 2000.
3. Castle, J. C. and R. D. van der Hilst, The core-mantle boundary under the Gulf of Alaska: No ULVZ for shear waves, Earth Planet. Sci. Lett., 176, 311-321, 2000.
4. Dziewonski, A. M. and D. L. Anderson, Preliminary reference Earth model, Phys. Earth Planet. Inter., 25, 297-356, 1981.
5. Dziewonski, A. M., T. A. Chou, and J. H. Woodhouse, Detemination of earthquake source parameters from waveform data for studies of global and regional seismicity, J. Geophys. Res., 86, 2825-2852, 1981.
6. Garcia, R., and A. Souriau, Amplitude of the core-mantle boundary topography estimated by stochastic analysis of core phases, Phys. Earth Planet. Inter., 117, 345-359, 2000.
7. Garnero, E. J., and D. V. Helmberger, A very slow basal layer underlying large-scale low-velocity anomalies in the lower mantle beneath the Pacific: Evidence from core phases, Phys. Earth Planet. Inter., 91, 161-176, 1995.
8. Garnero, E. J. and D. V. Helmberger, Seismic detection of a thin laterally varying boundary layer at the base of the mantle beneath the central-Pacific, Geophys. Res. Lett., 23, 977-980, 1996.
9. Garnero, E. J., and D. V. Helmberger, Further structural constraints and uncertainties of a thin laterally varying ultralow-velocity layer at the base of the mantle, J. Geophys. Res., 103, 12,495-12,509, 1998.
10. Garnero, E. J., and R. Jeanloz, Fuzzy patches on the Earth's core-mantle boundary, Geophys. Res. Lett., 27, 2777-2780, 2000.
11. Garnero, E. J., J. Revenaugh, Q. Williams, T. Lay, and L. H. Kellogg, Ultralow velocity zone at the core-mantle boundary, in The Core-Mantle Boundary Region, Geodyn. Ser., vol. 28, edited by M. Gurnis et al., pp. 319-334, AGU, Washington, D.C., 1998.
12. Grand, D. H., and R. D. van der Hilst, and S. Widiyantoro, Global seismic tomography: A snapshot of convection in the Earth, GSA Today, 7, 1-7, 1997.
13. Helmberger, D., S. Ni, L. Wen, and J. Ritsema, Seismic evidence for ultralow-velocity zones beneath Africa and eastern Atlantic, J. Geophys. Res., 105, 23,865-23,878, 2000.
14. Kennett, B. L. N., and E. R. Engdahl, Traveltimes for global earthquake location and phase identification, Geophys. J. R. Astron. Soc., 105, 429-465, 1991.
15. Knittle, E., and R. Jeanloz, Earth's core-mantle boundary: Results of experiments of high pressures and temperatures, Science, 251, 1438-1443, 1991.
16. Manga, M., and R. Jeanloz, Implications of a metal-bearing chemical boundary layer in D″ for mantle dynamics, Geophys. Res. Lett., 23, 3091-3094, 1996.
17. Mavko, G. M., Velocity and attenuation of partially molten rocks, J. Geophys. Res., 85, 5173-5189, 1980.
18. Mori, J., and D. V. Helmberger, Localized boundary layer below the mid-Pacific velocity anomaly identified from a PcP precursor, J. Geophys. Res., 100, 20,359-20,365, 1995.
19. Müeller, G., The reflectivity method: a tutorial, J. Geophys., 58, 153-174, 1985.
20. Persh, S. E., J. E. Vidale, and P. S. Earle, Absence of short-period ULVZ precursors to PcP and ScP from two regions of the CMB, Geophys. Res. Lett., 28, 287-290, 2001.
21. Reasoner, C., and J. Revenaugh, Short-period P wave constraints on D″ reflectivity, J. Geophys. Res., 104, 955-961, 1999.
22. Revenaugh, J., and R. Meyer, Seismic evidence of partial melt within a possibly ubiquitous low-velocity layer at the base of the mantle, Science, 277, 670-673, 1997.
23. Sidorin, I., M. Gurnis, and D. V. Helmberger, Dynamics of a phase change at the base of the mantle consistent with seismological observations, J. Geophys. Res., 104, 15,005-15,023, 1999.
24. Sleep, N., Hot spots and mantle plumes: Some phenomenology, J. Geophys. Res., 95, 6715-6736, 1990.
25. van der Hilst, R. D., S. Widiyantoro, and E. R. Engdahl, Evidence for deep mantle circulation from global tomography, Nature, 386, 578-584, 1997.
26. Vidale, J. E. and M. A. H. Hedlin, Evidence for partial melt at the core-mantle boundary north of Tonga from the strong scattering of seismic waves, Nature, 391, 682-685, 1998.
27. Wen, L. and D. V. Helmberger, A two-dimensional P-SV hybrid method and its application to modeling localized structures near the core-mantle boundary, J. Geophys. Res., 103, 17,901-17,918, 1998.
28. Williams, Q., and E. J. Garnero, Seismic evidence for partial melt at the base of Earth's mantle, Science, 273, 1528-1530, 1996.
29. Williams, Q., J. Revenaugh, and E. J. Garnero, A correlation between the hot spot distribution and ultra-low basal velocities in the mantle, Nature, 281, 546-549, 1998.
30. Yamada, A., and I. Nakanishi, Detection of P-wave reflector in D″ beneath the south-western Pacific using double-array stacking, Geophys. Res. Lett., 23, 1553-1556, 1996.