Efficacy of the post-perovskite phase as an explanation for lowermost-mantle seismic properties

Nature

Volumn 438, Issue 7070, 2005, Pages 1004-1007

  Wookey, James ^a,c   Stackhouse, Stephen ^b   Kendall, J Michael ^c   Brodholt, John ^b   Price, G David ^b  

^a UNIVERSITY OF LEEDS   (United Kingdom)

^b UNIVERSITY COLLEGE LONDON   (United Kingdom)

^c UNIVERSITY OF BRISTOL   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

ELECTROMAGNETISM; MAGNESIUM COMPOUNDS; PHASE TRANSITIONS; PRESSURE EFFECTS; RHEOLOGY; SEISMOLOGY;

EARTH'S MANTLE; POST-PEROVSKITE PHASE; SEISMIC MODELING;

PEROVSKITE;

MAGNESIUM SILICATE; PEROVSKITE;

MANTLE CHEMISTRY; MANTLE DISCONTINUITY; PEROVSKITE;

AB INITIO CALCULATION; ANISOTROPY; ARTICLE; MATHEMATICAL MODEL; PRESSURE; PRIORITY JOURNAL; TEMPERATURE;

EID: 30744438062     PISSN: 00280836     EISSN: 14764687     Source Type: Journal    
DOI: 10.1038/nature04345     Document Type: Article

References (30)

1. Wysession, M. E., et al. in The Core-Mantle Boundary Region (eds Gurnis, M., Wysession, M. E., Knittle, E. & Buffett, B. A.) Vol. 28, 273-297 (American Geophysical Union, Washington DC, 1998).
2. Ringwood, A. E. Phase transformations and their bearing on the constitution and dynamics of the mantle. Geochim. Cosmochim. Acta 55, 2083-2110 (1991).
3. 3. Science 304, 855-857 (2004).
4. Thomas, C., Kendall, J.-M. & Lowman, J. Lower-mantle seismic discontinuities and the thermal morphology of subducted slabs. Earth Planet. Sci. Lett. 225, 105-113 (2004).
5. Herlund, J. W., Thomas, C. & Tackley, P. J. A doubling of the post-perovskite phase boundary and structure of the Earth's lowermost mantle. Nature 434, 882-886 (2005).
6. Hohenberg, P. & Kohn, W. Inhomogeneous electron gas. Phys. Rev. B 136, 864-871 (1964).
7. 3 in Earth's D′ layer. Nature 430, 445-448 (2004).
8. 3 perovskite and geophysical implications. Earth Planet. Sci. Lett. 164, 371-378 (1998).
9. 3. Geophys. Res. Lett. 31, L14603 (2004).
10. 3. Earth Planet. Sci. Lett. 230, 1-10 (2005).
11. 3 post-perovskite phase in the Earth's lowermost mantle. Nature 430, 442-445 (2004).
12. 3 perovskite in the Earth's lower mantle. Earth Planet. Sci. Lett. 224, 241-248 (2004).
13. Masters, G., Laske, G., Bolton, H. & Dziewonski, A. M. in Earth's Deep Interior: Mineral physics and Tomography From the Atomic to the Global Scale (eds Karato, S., Forte, A., Liebermann, R., Masters, G. & Stixrude, L.) Vol. 117, 201-213 (American Geophysical Union, Washington DC, 2000).
14. Trampert, J., Deschamps, F., Resovsky, J. & Yuen, D. Probabilistic tomography maps chemical heterogeneities throughout the lower mantle. Science 306, 853-856 (2004).
15. Kennett, B. L. N., Engdahl, E. R. & Buland, R. Constraints on seismic velocities in the Earth from traveltimes. Geophys. J. Int. 122, 108-124 (1995).
16. Karki, B. B., Wentzcovitch, R. M., Gironcoli, S. d. & Baroni, S. First-principles determination of elastic anisotropy and wave velocities of MgO at lower mantle conditions. Science 286, 1705-1707 (1999).
17. Mueller, G. The reflectivity method; a tutorial. Z. Geophys. 58, 153-174 (1985).
18. Kendall, J.-M. in Earth's Deep Interior: Mineral physics and Tomography From the Atomic to the Global Scale (eds Karato, S., Forte, A., Liebermann, R., Masters, G. & Stixrude, L.) Vol. 117, 133-159 (American Geophysical Union, Washington DC, 2000).
19. Lay, T., Williams, Q., Garnero, E. J., Kellogg, L. & Wysession, M. E. in The Core-Mantle Boundary Region (eds Gurnis, M., Wysession, M. E., Knittle, E. & Buffett, B. A.) Vol. 28, 299-318 (American Geophysical Union, Washington DC, 1998).
20. Panning, M. & Romanowicz, B. Inferences on flow at the base of Earth's mantle based on seismic anisotropy. Science 303, 351-353 (2004).
21. Montagner, J.-P. & Kennett, B. L. N. How to reconcile body-wave and normal-mode reference Earth models. Geophys. J. Int. 125, 229-248 (1996).
22. 3. Nature 428, 837-840 (2004).
23. Hirose, K., Fei, Y., Ma, Y. & Mao, H.-K. The fate of subducted basaltic crust in the Earth's lower mantle. Nature 397, 53-56 (1999).
24. Garnero, E. J., Revenaugh, J., Lay, T. & Kellog, L. H. in The Core-Mantle Boundary Region (eds Gurnis, M., Wysession, M. E., Knittle, E. & Buffett, B. A.) Vol. 28 319-334 (American Geophysical Union, Washington DC, 1998).
25. Thomas, C., Weber, M., Wicks, C. W. & Scherbaum, F. Small scatterers in the lower mantle observed at German broadband arrays. J. Geophys. Res. 104, 15073-15088 (1999).
26. Brana, L. & Helffrich, G. A scattering region near the core-mantle boundary under the North Atlantic. Geophys. J. Int. 158, 625-636 (2004).
27. Tackley, P. J. in The Core-Mantle Boundary Region (eds Gurnis, M., Wysession, M. E., Knittle, E. & Buffett, B. A.) Vol. 28, 231-253 (American Geophysical Union, Washington DC, 1998).
28. Gubbins, D. Geomagnetic polarity reversals: a connection with secular variation and core-mantle interaction? Rev. Geophys. 32, 61-83 (1994).
29. Jellinek, A. M. & Manga, M. The influence of a chemical boundary layer on the fixity, spacing and lifetime of mantle plumes. Nature 418, 760-763 (2002).
30. Kendall, J.-M. & Helffrich, G. SPICED: imaging the deep Earth. Astron. Geophys. 42, 26-29 (2001).