Investigating D″ structure beneath the North Atlantic

Physics of the Earth and Planetary Interiors

Volumn 151, Issue 1-2, 2005, Pages 115-127

  Wallace, Margaret ^a   Thomas, Christine ^a  

^a UNIVERSITY OF LIVERPOOL   (United Kingdom)

Author keywords

D structure; Lower mantle; S waves; Synthetic seismograms

Indexed keywords

ASTROPHYSICS; DATA REDUCTION; EARTH (PLANET); SEISMOLOGY; SURFACE STRUCTURE; SURFACE TOPOGRAPHY;

HIGH-VELOCITY LAMELLAE; NORTH ATLANTIC OCEAN; SEISMIC VELOCITY; SYNTHETIC SEISMOGRAMS;

OCEANOGRAPHY;

LOWER MANTLE; S-WAVE; SEISMIC VELOCITY; SEISMOMETRY; SYNTHETIC SEISMOGRAM;

ATLANTIC OCEAN; ATLANTIC OCEAN (NORTH); OCEANIC REGIONS; WORLD;

EID: 18844450494     PISSN: 00319201     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.pepi.2005.02.001     Document Type: Article

References (57)

1. L.P. Braña G. Helffrich A discrete scatterer near the core-mantle boundary under the North Atlantic Geophys. J. Int. 158 2004 625-636
2. K.E. Bullen Compressibility-pressure hypothesis and the earth's interior Month. Not. R. Astr. Soc., Geophys. Suppl. 5 1949 355-368
3. J.B. Gaherty T. Lay Investigation of laterally heterogeneous shear velocity structure in D″ beneath Eurasia J. Geophys. Res. 97 1992 417-435
4. E.J. Garnero Heterogeneity of the lowermost mantle Annu. Rev. Earth Planet. Sci. 28 2000 509-537
5. E.J. Garnero S.P. Grand D.V. Helmberger Low P-wave velocity at the base of the mantle Geophys. Res. Lett. 20 17 1993 1843-1846
6. E.J. Garnero 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 1996 977-980
7. E.J. Garnero M.M. Moore T. Lay M. Fouch Isotropy or weak vertical transverse isotropy in D ″ beneath the Atlantic Ocean J. Geophys. Res. 109 2004
8. E.J. Garnero J. Revenaugh Q. Williams T. Lay L.H. Kellogg Ultralow velocity zone at the core-mantle boundary In: M. Gurnis M.E. Wysession E. Knittle B.A. Buffett (Eds.) The Core-Mantle Boundary Region 1998 Am. Geophys. Union 319-334
9. S.P. Grand Mantle shear-wave tomography and the fate of subducted slabs Phil. Trans. R. Soc. London A 360 2002 2475-2491
10. R.A.W. Haddon G.G.R. Buchbinder S-wave scattering by 3D heterogeneities at the base of the mantle Geophys. Res. Lett. 14 9 1987 891-894
11. M.A.H. Hedlin 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. Solid Earth 105 2000 13655-13673
12. R. Hide Interaction between the Earth's liquid core and solid mantle Nature 222 1969 1055-1056
13. R. Holme Electromagnetic core-mantle coupling. I. Explaining decadal variations in the Earth's length of day Geophys. J. Int. 132 1998 167-189
14. D. Jault J.L. Le Mouel Exchange of angular momentum between the core and the mantle J. Geomag. Geoelect. 43 1991 111-129
15. J.-M. Kendall Seismic anisotropy in the boundary layers of the mantle In: S. Karato (Ed.) Earth's Deep Interior, Mineral Physics and Tomography from the Atomic to the Global Scale 2000 Am. Geophys. Union 133-159
16. J.-M. Kendall G. Helffrich SPICeD: Imaging the deep earth Astron. Geophys. 42 2001 326-329
17. J.-M. Kendall C. Nangini Lateral variations in D″ below the Caribbean Geophys. Res. Lett. 23 1996 399-402
18. J.-M. Kendall P.M. Shearer On the structure of the lowermost mantle beneath the southwest Pacific, southeast Asia and Australasia Phys. Earth Planet. Int. 92 1995 85-98
19. J.-M. Kendall P.G. Silver Investigating causes of D″ anisotropy In: M. Gurnis M.E. Wysession E. Knittle B.A. Buffett (Eds.) The Core-Mantle Boundary Region 1998 Am. Geophys. Union 97-118
20. B.N.L. Kennett E.R. Engdahl R. Buland Constraints on seismic velocities in the Earth from travel times Geophys. J. Int. 122 1995 108-124
21. F. Krüger M. Weber F. Scherbaum J. Schlittenhardt Evidence for normal and inhomogeneous lowermost mantle and core-mantle boundary structure under the Arctic and Northern Canada Geophys. J. Int. 122 1995 637-657
22. T. Lay E.J. Garnero Q. Williams Partial melting in a thermo-chemical boundary layer at the base of the mantle Phys. Earth Planet. Int. 146 2004 441-467
23. T. Lay D.V. Helmberger A lower mantle S-wave triplication and the velocity structure of D″ Geophys. J. R. Astron. Soc. 75 1983 799-837
24. T. Lay Q. Williams E.J. Garnero The core-mantle boundary layer and deep Earth dynamics Nature 392 1998 461-468
25. T. Lay Q. Williams E.J. Garnero L. Kellogg M.E. Wysession Seismic wave anisotropy in the D″ region and its implications In: M. Gurnis M.E. Wysession E. Knittle B.A. Buffett (Eds.) The Core-Mantle Boundary Region 1998 Am. Geophys. Union 299-318
26. T. Lay C.J. Young Imaging scattering structures in the lower mantle by migration of long-period S waves J. Geophys. Res. 101 1996 20023-21040
27. C. Lithgow-Bertelloni M.A. Richards The dynamics of Cenozoic and Mesozoic plate motions: Reviews of geophysics Am. Geophys. Union 36 1998 27-78
28. X.-F. Liu J. Tromp A.M. Dziewonski Is there a first order discontinuity in the lowermost mantle? Earth and Planet Sci. Lett. 160 1998 343-351
29. D. Mainprice G. Barruol W. Ben Ismail The seismic anisotropy of the earth's mantle: From single crystal to polycrystal In: S. Karato (Ed.) Earth's Deep Interior, Mineral Physics and Tomography from the Atomic to the Global Scale 2000 Am. Geophys. Union 237-264
30. E. Matzel M.K. Sen S.P. Grand Evidence for anisotropy in the deep mantle beneath Alaska Geophys. Res. Lett. 23 18 1996 2417-2420
31. J.-P. Montagner Where can seismic anisotropy be detected in the Earth's Mantle? In boundary layers... Pure Appl. Geophys. 151 1998 223-256
32. G. Müller The reflectivity method: A tutorial J. Geophys. 58 1985 153-174
33. H.-C. Nataf S. Houard Seismic discontinuities at the top of D″: A world-wide feature? Geophys. Res. Lett. 20 1993 2371-2374
34. J.P. Poirier V. Malavergne J.L. Le Mouel Is there a thin electrically conducting layer at the base of the mantle? In: M. Gurnis M.E. Wysession E. Knittle B.A. Buffett (Eds.) The Core-Mantle Boundary Region 1998 Am. Geophys. Union 131-138
35. S. Rost J. Revenaugh Small-scale ultra-low velocity zone structure resolved by ScP J. Geophys. Res. Solid Earth 108 2003 2056-2065
36. F. Scherbaum F. Krüger M. Weber Double beam imaging: Mapping lower mantle heterogeneities using combinations of source and receiver arrays J. Geophys. Res. 102 1997 507-522
37. P.M. Shearer A.H. Hedlin P.S. Earle PKP and PKKP precursor observations: implications for the small-scale structure of the deep mantle and core In: M. Gurnis M.E. Wysession E. Knittle B.A. Buffett (Eds.) The Core-Mantle Boundary Region 1998 Am. Geophys. Union 37-56
38. I. Sidorin M. Gurnis Geodynamically consistent seismic velocity predictions at the base of the mantle In: M. Gurnis M.E. Wysession E. Knittle B.A. Buffett (Eds.) The Core-Mantle Boundary Region 1998 Am. Geophys. Union 209-230
39. P.G. Silver W.W. Chan Shear wave splitting and subcontinental mantle deformation J. Geophys. Res. 96 1991 16429-16454
40. P.J. Tackley Three-dimensional simulations of mantle convection with a thermo-chemical basal boundary layer: D ″? In: M. Gurnis M.E. Wysession E. Knittle B.A. Buffett (Eds.) The Core-Mantle Boundary Region 1998 Am. Geophys. Union 138-254
41. C. Thomas T. Heesom J.-M. Kendall Anisotropy and heterogeneity in the D″ region beneath the northern Pacific J. Geophys. Res. 107 2002 2274-2280
42. C. Thomas E.J. Garnero T. Lay High-resolution imaging of lowermost mantle structure under the Cocos plate J. Geophys. Res. 109 2004
43. C. Thomas J.-M. Kendall The lowermost mantle beneath northern Asia: Evidence for lower mantle anisotropy Geophys. J. Int. 151 2002 296-308
44. C. Thomas J.-M. Kendall J. Lowmann Lower mantle seismic discontinuities and the thermal morphology of subducted slabs Earth Planet. Sci. Lett. 225 2004 105-113
45. C. Thomas M. Weber R. Hofstetter A. Agnon A low velocity lamella in D ″. Geophys. Res. Lett. 25 1998 2885-2888
46. M.S. Thorne E.J. Garnero Inferences on ultralow-velocity zone structure from a global analysis of SPdKS waves J. Geophys. Res. 109 2004
47. R.W. Valenzuela M.E. Wysession Illuminating the base of the mantle with diffracted waves In: M. Gurnis M.E. Wysession E. Knittle B.A. Buffett (Eds.) The Core-Mantle Boundary Region 1998 Am. Geophys. Union 57-72
48. J.E. Vidale 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 6668 1998 682-685
49. M. Weber P-wave and S-wave reflections from anomalies in the lowermost mantle Geophys. J. Int. 115 1 1993 183-210
50. M. Weber Lamellae in D″? An alternative model for lower mantle anomalies Geophys. Res. Lett. 21 1994 2532-2534
51. M. Weber M. Körnig A search for anomalies in the lowermost mantle using seismic bulletins Phys. Earth Planet. Int. 73 1992 1-28
52. P. Wessel W.H.F. Smith Free software helps map and display data EOS Trans. Am. Geophys. Union 72 441 1991 445-446
53. Q. Williams E. Garnero Seismic evidence for partial melting at the base of Earth's mantle Science 273 1996 1528-1530
54. Q. Williams J. Revenaugh E. Garnero A correlation between ultra-low basal velocities in the mantle and hot spots Science 281 1998 546-549
55. C. Wright K.J. Muirhead A.E. Dixon The P wave velocity structure near the base of the mantle J. Geophys. Res. 90 1985 623-634
56. M.E. Wysession Imaging cold rocks at the base of the mantle: The sometimes fate of slabs? In: G.E. Bebout D. Scholl S. Kirby J.P. Platt (Eds.) Subduction: Top to Bottom 1996 Am. Geophys. Union 369-384
57. M.E. Wysession T. Lay J. Revenaugh Q. Williams E.J. Garnero R. Jeanloz L.H. Kellogg The D″ discontinuity and its implications In: M. Gurnis M.E. Wysession E. Knittle B.A. Buffett (Eds.) The Core-Mantle Boundary Region 1998 Am. Geophys. Union 273-298