Bulldozing the core-mantle boundary: Localized seismic scatterers beneath the Caribbean Sea

Physics of the Earth and Planetary Interiors

Volumn 170, Issue 1-2, 2008, Pages 89-94

  Miller, Meghan S ^a   Niu, Fenglin ^a  

^a RICE UNIVERSITY   (United States)

Author keywords

Core mantle boundary; Farallon slab; PKIKP precursors; Seismic scatterers

Indexed keywords

STRUCTURAL GEOLOGY;

CORE-MANTLE BOUNDARY; FARALLON SLAB; PKIKP PRECURSORS; SEISMIC SCATTERERS;

SEISMOLOGY;

CORE-MANTLE BOUNDARY; OCEANIC CRUST; PLATE TECTONICS; SEISMIC MIGRATION; SEISMIC VELOCITY; SEISMIC WAVE; SUBDUCTION ZONE; WAVE SCATTERING;

ATLANTIC OCEAN; CARIBBEAN SEA;

EID: 53249117144     PISSN: 00319201     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.pepi.2008.07.044     Document Type: Article

References (29)

1. Aki K., and Richards P.G. Quantitative Seismology: Theory and Methods (1980), W.H. Freeman and Co., San Francisco 932 pp.
2. Cao A., and Romanowicz B. Locating scatterers in the mantle using array analysis of PKIKP precursors from an earthquake doublet. Earth Planet. Sci. Lett. 255 (2007) 22-31
3. Cleary J.R., and Haddon R.A. Seismic wave scattering near the core-mantle boundary: a new interpretation of precursors to PKP. Nature 240 (1972) 549-551
4. Garnero E.J., and Lay T. D″ shear velocity heterogeneity, anisotropy, and discontinuity structure beneath the Caribbean and Central America. Phys. Earth Planet. Inter. 140 (2003) 219-242
5. Garnero E.J., Revenaugh J.S., Williams Q., Lay T., and Kellogg L.H. Ultralow velocity zone at the core-mantle boundary. In: Gurnis M., Wysession M.E., Knittle E., and Buffett B.A. (Eds). The Core-Mantle Boundary Region (1998), American Geophysical Union, Washington, DC 319-334
6. Grand S.P. Mantle shear-wave tomography and the fate of subducted slabs. Philos. Trans. R. Soc. Lond. A 360 (2002) 2475-2491
7. Haddon R.A., and Cleary J.R. Evidence for scattering of seismic PKP waves near the core-mantle boundary. Phys. Earth Planet. Inter. 8 (1974) 211-234
8. Hedlin M.A.H., Shearer P.M., and Earle P.S. Seismic evidence for small-scale heterogeneity throughout the Earth's mantle. Nature 387 (1997) 145-150
9. Hedlin M.A.H., and Shearer P.M. An analysis of large scale variations in small-scale mantle heterogeneity using GSN recordings of precursors to PKP. J. Geophys. Res. 105 (2000) 1870-1882
10. Hirose K., Fei Y., Ma Y., and Mao H.-K. The fate of subducted basaltic crust in the Earth's lower mantle. Nature 397 (1999) 53-56
11. Hung S.-H., Garnero E.J., Chiao L.-Y., Kuo B.-Y., and Lay T. Finite frequency tomography of D″ shear velocity heterogeneity beneath the Caribbean. J. Geophys. Res. 110 (2005) 10.1029/2004JB003373
12. Husebye E.S., King D.W., and Haddon R.A. Precursors to PKIKP and seismic wave scattering near the mantle-core boundary. J. Geophys. Res. 81 (1976) 170-182
13. Hutko A.R., Lay T., Garnero E.J., and Ravenaugh J. Seismic detection of folded, subducted lithosphere at the core-mantle boundary. Nature 441 (2006) 333-336
14. Kaneshima S., and Helffrich G. Detection of lower mantle scatterers northeast of the Mariana subduction zone using short-period array data. J. Geophys. Res. 103 (1998) 4825-4838
15. Kennett B.L.N., and Engdahl E.R. Travel times for global earthquake location and phase identification. Geophys. J. Int. 105 (1991) 429-465
16. Lay T., and Garnero E.J. Core-mantle boundary structures and processes. In: Sparks R.S.J., and Hawkesworth C.J. (Eds). The State of the Planet: Frontiers and Challenges in Geophysics. Geophysical Monograph Series, 150, IUGG vol. 19 (2004), American Geophysical Union, Washington, DC 25-41
17. Lee C.-T.A., and Chen W.-P. Possible density segregation of subducted oceanic lithosphere along a weak serpentinite layer and implications for compositional stratification of the Earth's mantle. Earth Planet. Sci. Lett. 255 (2007) 357-366
18. Levander A., Schmitz M., Lallemant H.G., Zelt C.A., Sawyer D.S., Magnani M.B., Mann P., Christeson G.L., Wright J.E., Pavlis G.L., and Pindell J. Evolution of the southern Caribbean Plate boundary. EOS Trans. 87 (2006) 97
19. Muirhead K.J. Eliminating false alarms when detecting seismic events automatically. Nature 217 (1968) 533-534
20. Niu F., and Kawakatsu H. Depth variation of the mid-mantle seismic discontinuity. Geophys. Res. Lett. 24 (1997) 429-432
21. Niu F., and Wen L. Strong seismic scatterers near the core-mantle boundary west of Mexico. Geophys. Res. Lett. 28 (2001) 3557-3560
22. Pindell J., Kennan L., Maresch W.V., Stanek K.-P., Draper G., and Higgs R. Plate-kinematics and crustal dynamics of circum-Caribbean arc-continent interactions: tectonic controls on basin development in Proto-Caribbean margins. In: Lallemant H.G., and Sisson V.B. (Eds). Caribbean-South American Plate Interactions, Venezuela (2005), Geological Society of America, Boulder, CO 7-52
23. Ren Y., Stutzmann E., van der Hilst R., and Besse J. Understanding seismic heterogeneities in the lower mantle beneath the Americas from seismic tomography and plate tectonic history. J. Geophys. Res. 112 (2007) B01302 10.1029/2005JB004154
24. Sun D., Song T.R.A., and Helmberger D.V. Complexity of D″ in the presence of slab-debris and phase changes. Geophys. Res. Lett. 33 (2006) 10.1029/2005GL025384
25. Tan, E., Gurnis, M., Han, L., 2002. Slabs in the lower mantle and their modulation of plume formation. Geochemistry, Geophysics, Geosystems 3(11), 1067, doi:10.1029/2001GC000238.
26. Thomas C., Weber M., Wicks C.W., and Scherbaum F. Small scatterers in the lower mantle observed at German broadband arrays. J. Geophys. Res. 104 (1999) 15073-15088
27. Vidale J.E., and Hedlin M.A.H. Evidence for partial melt at the core-mantle boundary north of Tonga from the strong scattering of seismic waves. Nature 391 (1998) 682-684
28. Wen L. Intense seismic scattering near the Earth's core-mantle boundary beneath the Comoros hotspot. Geophys. Res. Lett. 27 (2000) 3627-3630
29. Wen L., and Helmberger D.V. Ultra-low velocity zones near the core-mantle boundary from broadband PKIKP precursors. Science 279 (1998) 1701-1703