PKP differential travel times: Implications for 3-D lower mantle structure

Geophysical Research Letters

Volumn 24, Issue 15, 1997, Pages 1863-1866

  Song, Xiaodong ^a   Helmberger, Don V ^b,c  

^a Lamont Doherty Earth Observatory of Columbia University   (United States)

^b CALIFORNIA INSTITUTE OF TECHNOLOGY   (United States)

^c CALIFORNIA INSTITUTE OF TECHNOLOGY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

SEISMIC WAVES; SHEAR WAVES; TOMOGRAPHY; GEOLOGIC MODELS;

LOWER MANTLE; LOWERMOST MANTLE; P WAVES; P-VELOCITY; PREDICTED RESIDUALS; S VELOCITY; TOMOGRAPHIC; VARIANCE REDUCTIONS;

VELOCITY; TECTONICS;

DIFFERENTIAL SEISMIC WAVE TRAVEL TIMES; MANTLE TOMOGRAPHIC MODELS; THREE DIMENSIONAL LOWER MANTLE STRUCTURE;

LOWER MANTLE; MANTLE STRUCTURE; PKP TRAVELTIME; SEISMIC TOMOGRAPHY;

EID: 0031200941     PISSN: 00948276     EISSN: None     Source Type: Journal    
DOI: 10.1029/97GL01761     Document Type: Article

References (20)

1. Bolton, H., and G. Masters, Scaling S to P in the mantle: Does it work? (abstract), Eos Trans. AGU, 75(44), Fall Meeting Suppl., 476, 1994.
2. Cormier, V.F., Slab diffraction of S waves, J. Geophys. Res., 94, 3006-3024, 1989.
3. Creager, K.C., Inner-core rotation from differential PKP travel times at COL and the Alaska Seismic Network (abstract), AGU Fall Meeting, December, 1996.
4. Ding, X., and D.V. Helmberger, Modeling D″ structure beneath Central America with broadband seismic data, Phys. Earth Planet. Inter., in press, 1997.
5. Dziewonski, A.M., Mapping the lower mantle: Determination of Lateral Heterogeneity in P velocity up to Degree and Order 6, J. Geophys. Res., 89, 5929-5952, 1984.
6. Dziewonski, A.M., and D.L. Anderson, Preliminary reference Earth model, Phys. Earth Planet. Inter., 25, 297-356, 1981.
7. Engdahl, E.R., R.D. van der Hilst, and R.P. Buland, Global teleseismic earthquake relocation with improved travel times and procedures for depth determination, submitted to Bull. Seismol. Soc. Am., 1997.
8. Gamero, E.J., D.V. Helmberger, Travel times of S and SKS: Implications for three-dimensional lower mantle structure beneath the central Pacific, J. Geophys. Res., 98, 8225-8241, 1993.
9. Grand, S.P., R.D. van der Hilst, and S. Widiyantoro, Global seismic tomography: a snapshot of convection in the Earth, GSA Today, 7(4), 1-7, 1997.
10. Gubbins, D. and R. Snieder, Dispersion of P waves in subducted lithosphere: Evidence for an eclogite layer, J. Geophys. Res., 96, 6321-6334, 1991.
11. Helffrich, G., and S. Sacks, Scatter and bias in differential PKP travel times and implications for mantle and core phenomena, Geophys. Res. Lett., 21, 2167-2170, 1994.
12. Inoue, H., Y. Fukao, K. Tanabe, and Y. Ogata, Whole mantle P-wave travel time tomography, Phys. Earth Planet. Inter., 59, 294-328, 1990.
13. Poupinet, G., A. Souriau, and L. Jenatton, A test on the Earth's core-mantle boundary structure with antipodal data: example of Fiji-Tonga earthquakes recorded in Tamanrasset, Algeria, Geophys. J. Int., 113, 684-692, 1993.
14. Richards, M.A., and D.O. Engebretson, Large-scale mantle convection and the history of subduction, Nature, 355, 437-440, 1992.
15. Robertson, G.S., and J.H. Woodhouse, Evidence for proportionality of P and S heterogeneity in the lower mantle, Geophys. J. Int., 123, 85-116, 1995.
16. Song, X.D., and D.V. Helmberger, Effect of velocity structure in D″ on PKP phases Geophys. Res. Lett., 20, 285-288, 1993.
17. Vinnik, L., B. Romanowicz, and L. Breger, Anisotropy in the center of the inner core, Geophys. Res. Lett. , 21, 1671-1674, 1994.
18. Wysession, M.E., E.A. Okal, and C.R. Bina, The structure of the core-mantle boundary from diffracted waves, J. Geophys. Res., 97, 8749-8764, 1992.
19. Wysession, M.E., Long-wavelength structure of the core-mantle boundary from differential core-diffracted and core-refracted seismic waves, Nature, 382, 244-248, 1996.
20. Yuen, D.A., and W.R. Peltier, Mantle plumes and the thermal stability of the D″ layer, Geophys. Res. Lett., 7, 625-628, 1980.