Subparallel dipping heterogeneities in the mid-lower mantle

Journal of Geophysical Research: Solid Earth

Volumn 108, Issue 5, 2003, Pages

  Kaneshima, Satoshi ^a   Helffrich, George ^b  

^a TOKYO INSTITUTE OF TECHNOLOGY   (Japan)

^b UNIVERSITY OF BRISTOL   (United Kingdom)

Author keywords

Chemical heterogeneity; Mid lower mantle; S to P converted waves; Subparallel dipping structure

Indexed keywords

HETEROGENEITY; MANTLE STRUCTURE; SEISMIC VELOCITY; SLAB; SUBDUCTION; VELOCITY STRUCTURE;

EID: 0042384498     PISSN: 21699313     EISSN: 21699356     Source Type: Journal    
DOI: None     Document Type: Article

References (52)

1. Aki, K., and P. G. Richards. Quantitative Seismology: Theory, and Methods, W. H. Freeman, New York, 1980.
2. Albarede, F., and R. D. van der Hilst, New mantle convection model may reconcile conflicting evidence, Eos Trans. AGU, 80, 535,537 539,1999.
3. Allegre, C. J., and D. L. Turcotte, Implications of a two-component marble cake mantle, Nature, 323, 123-127, 1986.
4. Anderson, D. L., and J. W. Given, Absorption band Q model for the Earth, J. Geophys. Res., 87, 3893-3904, 1982.
5. Castle, J. C., and K. C. Creager, A steeply dipping discontinuity in the lower mantle beneath Izu-Bonin, J. Geophys. Res., 104, 7279-7292, 1999.
6. Christensen, U. R., and A. W. Hofmann, Segregation of subducted oceanic crust in the convecting mantle, J. Geophys. Rev., 99, 19,867 19,884, 1994.
7. Crosson, R. S., Crustal structure modeling of earthquake data: 2. Velocity structure of the Puget Sound Region, Washington, J. Geophys. Res., 81, 3047 3054, 1976.
8. Davies, G. F., Mantle plumes, mantle stirring and hotspot chemistry, Earth Planet. Sci. Lett., 99, 94-109, 1990.
9. Davies, D. F., and M. A. Richards, Mantle convection, J. Geol, 100, 151 206, 1992.
10. 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.
11. Dziewonski, A. M., and D. L. Anderson, Preliminary reference Earth model, Phys. Earth Planet. Int., 25, 297 356, 1981.
12. Efron, B., and R. J. Tibshirani, An Introduction to the Bootstrap, Chapman and Hall, New York, 1993.
13. Engebretsen, D. C., A. Cox, and R. G. Gordon, Relative motions between oceanic and continental plates in the Pacific basin, Spec. Pap. Geol. Soc. Am., 206, 1-59, 1985.
14. Fuchs, K., and G. Muller, Computation of synthetic seismograms with the reflectivity method and comparison with observation, Geophys. J. R. Astron. Soc., 23, 417-433, 1971.
15. Gaherty, J. B., and B. H. Hager, Compositional vs. thermal buoyancy and the evolution of subducted lithosphere, Geophys. Res. Lett., 21, 141 144, 1994.
16. Grand, S. P., R. D. van der Hilst, and S. Widiyantoro, Global seismic tomography: A snapshot of convection in the Earth, GSA Today, 7, 1-7, 1997.
17. Gurnis, M., Quantitative bounds on the size spectrum of isotopic heterogeneity within the mantle, Nature, 323, 317-320, 1986.
18. Gurnis, M., and G. F. Davies, Mixing in numerical models of mantle convection incorporating plate kinematics, J. Geophys. Res., 91, 6375-6395, 1986.
19. Hedlin, M. A. H., and P. M. Shearer, An analysis of large-scale variations in small-scale mantle heterogeneity using global seismographic network recordings of precursors to PKP, J. Geophys. Res., 105, 13,655-13, 673, 2000.
20. Hedlin, M. A. H., P. M. Shearer, and P. S. Earle, Seismic evidence for small-scale heterogeneity throughout the Earth's mantle, Nature, 387, 145-150, 1997.
21. Helffrich, G. R., Geophys. J. Int, 131, 741, 1998.
22. Hess, P. C., Origins of Igneous Rocks, Harvard Univ. Press, Cambridge, Mass., 1989.
23. Kaneshima, S., and G. Helffrich, Detection of lower mantle scatterers northeast of the Marianna subduction zone using short-period array data, J. Geophys. Res., 103, 4825-4838, 1998.
24. Kaneshima, S., and G. Helffrich, Dipping low-velocity layer in the midlower mantle: Evidence for geochemical heterogeneity, Science, 283, 1888-1891, 1999.
25. Karato, S., A. Zhang, and H.-R. Wenk, Superplasticity int Earth's lower mantle: Evidence from seismic anisotropy and rock physics, Science, 270, 458-461, 1995.
26. Kawakatsu, H., and F. Niu, Seismic evidence for a 920-km discontinuity in the mantle, Nature, 371, 301-305, 1994.
27. Kellogg, L. H., Mixing in the mantle, Annu. Rev. Earth Planet. Sci., 20, 365-388, 1992.
28. Kellogg, L. H., and D. L. Turcotte, Mixing and distribution of heterogeneities in a chaotically convecting mantle, J. Geophys. Res., 95, 421 432, 1990.
29. Kellogg, L. H., B. H. Hager, and R. D. van der Hilst, Compositional stratification in the deep mantle, Science, 283, 1881 1884, 1999.
30. Kennett, B. L. N., and E. R. Engdahl, Travel times for global earthquake location and phase identification, Geophys. J. Int., 105, 429-465, 1991.
31. Kennett, B. L. N., E. R. Engdahl, and R. Buland, Constraints on seismic velocities in the Earth from travel times, Geophys. J. Int., 122, 108-124, 1995.
32. Kind, R., Extensions of the reflectivity method for a buried source, J. Geophys., 45, 373-380, 1979.
33. Kruger, F., M. Baumann, F. Scherbaum, and M. Weber, Mid mantlescatterers near the Mariana slab detected with a double array method, Geophys. Res. Lett., 28, 667-670, 2001.
34. le Stunff, Y., C. W. Wicks, and B. Romanowicz, P′ P′ precursors under Africa: Evidence for mid-mantle reflectors, Science, 270, 74-77, 1995.
35. Li, X.-D., and B. Romanowicz, Global mantle shear velocity model developed using nonlinear asymptotic coupling theory, J. Geophys, Res., 101, 2245 2272, 1996.
36. Meade, C., P. G. Silver, and S. Kaneshima, Laboratory and seismological observations of lower mantle isotropy, Geophys. Res. Lett., 22, 1293-1296, 1995.
37. Neidell, N. S., and M. T. Taner, Semblance and other coherency measures for multichannel data, Geophysics, 36, 482 497, 1971.
38. Niu, F., S. Kaneshima, and H, Kawakatshu, Reflected S-to-P converted wave from a dipping mid-mantle reflector beneath Mariana subduction zone, Eos Trans. AGU, 80(17), Spring Meet. Suppl., S217 D218, 1999.
39. Nolet, G., and T.-J. Moser, Teleseismic delay times in a 3-D Earth and a new look at the S discrepancy, Geophys. J. Int., 114, 185 195, 1993.
40. Nolet, G., S. P Grand, and B. L. N. Kennett, Seismic heterogeneity in the upper mantle, J. Geophys. Res., 99, 23,753 23,766, 1994.
41. Owens, T. J., R. S. Crosson, and M. A. Hendrickson, Constraints on the subduction geometry beneath western Washington from broadband teleseismic waveform modeling, Bull. Seismol. Soc. Am., 78, 1319-1334, 1988.
42. Richards, P. G., Seismic waves reflected from velocity gradient anomalies within the Earth's mantle, J. Geophys., 38, 517 527, 1972.
43. Robertson, G. S., and J. H. Woodhouse, Evidence for proportionality of P and S heterogeneity, Geophys. J. Int., 123, 85 116, 1995.
44. Sakurai, T., Whole mantle P wave tomography and differential PP-P time measurement, Master's thesis, Univ. of Tokyo, Tokyo, 1996.
45. Schmalzl, J., G. A. Houseman, and U. Hansen, Mixing in vigorous, timedependent three-dimensional convection and application to Earth's mantle, J. Geophys. Res., 101, 21,847-21,858, 1996.
46. Shearer, P. M., M. A. H. Hedlin, and P. S. Earle, PKP and PKKP precursor observations: Implications for the small-scale structure of the deep mantle and core, Geodynamics, 28, 37-55, 1998.
47. Stacey, F. D., Physics of the Earth, 3rd ed, Brookfield, Brisbane, 1992.
48. Su, W,-J., and A. M. Dziewonski, Predominance of long-wavelength heterogeneity in the mantle, Nature, 352, 121 126, 1991.
49. van der Hilst, R. D., S. Widiyantoro, and E. R. Engdahl, Evidence for deep mantle circulation from global tomography, Nature, 386, 578 584, 1997.
50. Walzer, U., and R. Hendel, A new convection-fractionation model for the evolution of the principal geochemical reservoirs of the Earth's mantle, Phys. Earth Planet. Inter., 112, 211- 256, 1999.
51. Wessel, P., and W. H. Smith, New version of generic mapping tools, Eos Trans. AGU, 76, 329, 1995.
52. Yuen, D. A., 0. Cadek, A. Chopelas, and C. Matyska, Geophysical inferences of thermo-chemical structure in the lower mantle, Geophys. Res. Lett., 20, 899 902, 1993.