A low-velocity lamella in D″

Geophysical Research Letters

Volumn 25, Issue 15, 1998, Pages 2885-2888

  Thomas, Carsten ^a   Weber, Michael ^b   Agnon, Amotz ^c   Hofstetter, Abraham ^d  

^a UNIVERSITY OF GÖTTINGEN   (Germany)

^b GFZ GERMAN RESEARCH CENTRE FOR GEOSCIENCES   (Germany)

^c HEBREW UNIVERSITY OF JERUSALEM   (Israel)

^d GII   (Israel)

Author keywords

Mantle structure; Russian Federation; Seismic velocity; Siberia; Velocity structure

Indexed keywords

BOUNDARY LAYERS; EARTHQUAKES; MATHEMATICAL MODELS; ONE DIMENSIONAL; SEISMOLOGY; VELOCITY; COMPLEX NETWORKS; SEISMIC WAVES; WAVE PROPAGATION;

CORE MANTLE BOUNDARY; LOW VELOCITY LAMELLA; CORE-MANTLE BOUNDARY; HIGH AMPLITUDES; KURILE ISLANDS; LOCAL VARIATIONS; P-WAVE VELOCITY STRUCTURE; REGIONAL FEATURE; SEISMIC NETWORKS; WESTERN SIBERIA;

SEISMIC WAVES; VELOCITY;

MANTLE STRUCTURE; SEISMIC VELOCITY; VELOCITY STRUCTURE;

RUSSIAN FEDERATION; SIBERIA;

EID: 0032148187     PISSN: 00948276     EISSN: None     Source Type: Journal    
DOI: 10.1029/98GL52103     Document Type: Article

References (20)

1. Christensen, U.R., & A.W. Hofmann, Segregation of subducted oceanic crust in the converting mantle, J. geophys. Res., 99, 19867-19884, 1994.
2. Engdahl, R.E., R.v.d. Hilst, & R.P. Buland, Global teleseismic earthquake relocation with improved travel times and procedures for depth determination, Bull. Seismol. Soc. Am., submitted, 1997.
3. Emmerich, H., Theoretical study on the influence of CMB topography on the core reflection ScS, Phys. Earth Planet. Inter., 80, 125-134, 1993.
4. Gaherty, J.B., & T. Lay, Investigation of laterally heterogeneous shear velocity structure in D″ beneath Eurasia, J. geophys. Res., 97, 417-436, 1992.
5. Garnero, E., & D. 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.
6. Grand, S., R.v.d. Hilst, & S. Widiyantoro, Global seismic tomography; a snapshot of convection in the Earth, GSA Today, 7, 1-7, 1997.
7. Houard, S., & H.-C. Nataf, Laterally varying reflector at the top of D″ beneath Northern Siberia, Geophys. J. Int., 115, 168-182, 1993.
8. Kampfmann, W., & G. Müller, PcP amplitude calculations for a core-mantle boundary with topography, Geophys. Res. Lett., 16, 653-656, 1989.
9. Kendall, J.-M., & P.M. Shearer, Lateral variations in D″ thickness from long-period shear-wave data, J. geophys. Res., 99, 11575-11590, 1994.
10. Kennett, B.L.N., & E.R. Engdahl, Traveltimes for global earthquake location and phase identification, Geophys. J. Int., 105, 429-465, 1991.
11. Lay, T., & D.V. Helmberger, A lower mantle S wave triplication and the shear velocity structure of D″, Geophys. J. R. astron Soc., 75, 799-837, 1983.
12. Loper, D.E., & T. Lay, The core-mantle boundary region, J. geophys. Res., 100, 6397-6420, 1995.
13. Scherbaum, F., F. Krüger, & M. Weber, Double beam imaging: Mapping lower mantle heterogeneities using combinations of source and receiver arrays, J. geophys. Res., 102, 507-522, 1997.
14. Thomas, Ch., & M. Weber, P velocity heterogeneities in the lower mantle determined with the German Regional Seismic Network: Improvement of previous models and results of 2D modeling, Phys. Earth Planet. Inter., 101, 105-117, 1997.
15. v.d.Hilst, R., S. Widiyantoro, & E.R. Engdahl, Evidence for deep mantle circulation from global tomography, Nature, 386, 578-584, 1997.
16. Weber, M., & J.P. Davis, Evidence of a laterally variable lower mantle structure from P- and S-waves, Geophys. J. Int., 102, 231-255, 1990.
17. Weber, M., & M. Körnig, A search for anomalies in the lowermost mantle using seismic bulletins, Phys. Earth Planet. Inter., 73, 1-28, 1992.
18. Weber, M., Lamellae in D″ ?, An alternative model for lower mantle anomalies, Geophys. Res. Lett., 21, 2531-2534, 1994.
19. Williams, Q., & E. Garnero, Seismic evidence for partial melt at the base of earth's mantle, Science, 273, 1528-1530, 1996
20. Wysession, M.E., E.A. Okal, & C.R. Bina, The structure of the core-mantle boundary from diffracted waves, J. geophys. Res., 97, 8749-8764, 1992.