New advances in using seismic anisotropy, mineral physics and geodynamics to understand deformation in the lowermost mantle

Journal of Geodynamics

Volumn 52, Issue 3-4, 2011, Pages 205-228

  Nowacki, Andy ^a   Wookey, James ^a   Kendall, J Michael ^a  

^a UNIVERSITY OF BRISTOL   (United Kingdom)

Author keywords

Anisotropy; D ; Lowermost mantle; Mantle flow

Indexed keywords

DEFORMATION; GEODYNAMICS; LOWER MANTLE; MINERALOGY; PHYSICAL PROPERTY; SEISMIC ANISOTROPY; SEISMIC TOMOGRAPHY; SEISMIC VELOCITY; SEISMOLOGY;

EID: 79960625929     PISSN: 02643707     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.jog.2011.04.003     Document Type: Review

References (172)

1. Adams D., Oganov A. Ab initio molecular dynamics study of CaSiO3 perovskite at P-T conditions of Earth's lower mantle. Phys. Rev. B 2006, 73:184106.
2. Ammann M.W., Brodholt J.P., Wookey J., Dobson D.P. First-principles constraints on diffusion in lower-mantle minerals and a weak D″ layer. Nature 2010, 465:462-465.
3. Andrault D., Muñoz M., Bolfan-Casanova N., Guignot N., Perrillat J.P., Aquilanti G., Pascarelli S. Experimental evidence for perovskite and post-perovskite coexistence throughout the whole D″ region. Earth Planet. Sci. Lett. 2010, 293:90-96.
4. Becker T.W., Boschi L. A comparison of tomographic and geodynamic mantle models. Geochem. Geophys. Geosyst. 2002, 3:1003.
5. Blackman D., Kendall J.M., Dawson P., Wenk H.R., Boyce D., Morgan J. Teleseismic imaging of subaxial flow at mid-ocean ridges: traveltime effects of anisotropic mineral texture in the mantle. Geophys. J. Int. 1996, 127:415-426.
6. Bull A.L., McNamara A.K., Becker T.W., Ritsema J. Global scale models of the mantle flow field predicted by synthetic tomography models. Phys. Earth Planet. Inter. 2010, 182:129-138.
7. Bullen K. The problem of the Earth's density variation. B. Seismol. Soc. Am. 1940, 30:235-250.
8. Bullen K. An Earth Model Based on a Compressibility-Pressure Hypothesis. Mon. Not. R. Astron. Soc. 1949, 109:720.
9. Carrez P., Ferré D., Cordier P. Implications for plastic flow in the deep mantle from modelling dislocations in MgSiO3 minerals. Nature 2007, 446:68-70.
10. Carrez P., Ferré D., Cordier P. Peierls-Nabarro modelling of dislocations in MgO from ambient pressure to 100GPa. Model. Simul. Mater. Sci. Eng. 2009, 17:035010.
11. Catalli K., Shim S.H., Prakapenka V.B. Thickness and Clapeyron slope of the post-perovskite boundary. Nature 2009, 462. 782-U101.
12. Chevrot S. Multichannel analysis of shear wave splitting. J. Geophys. Res. 2000, 105:21579-21590.
13. Cordier P., Ungar T., Zsoldos L., Tichy G. Dislocation creep in MgSiO3 perovskite at conditions of the Earth's uppermost lower mantle. Nature 2004, 428:837-840.
14. Ding X., Helmberger D. Modelling D″ structure beneath Central America with broadband seismic data. Phys. Earth Planet. Inter. 1997, 101:245-270.
15. Durham W., Weidner D., Karato S., Wang Y. New developments in deformation experiments at high pressure. Reviews in Mineralogy & Geochemistry 2002, vol. 51:21-49. Mineralogical Society of America, San Francisco, USA. S. Karato, H. Wenk (Eds.).
16. Dziewonski A., Anderson D. Preliminary reference Earth model. Phys. Earth Planet. Inter. 1981, 25:297-356.
17. Ford S., Garnero E.J., McNamara A.K. A strong lateral shear velocity gradient and anisotropy heterogeneity in the lowermost mantle beneath the southern Pacific. J. Geophys. Res. 2006, 111:B03306.
18. Fouch M.J., Fischer K.M., Wysession M. Lowermost mantle anisotropy beneath the Pacific: imaging the source of the Hawaiian plume. Earth Planet. Sci. Lett. 2001, 190:167-180.
19. Fukao Y. Evidence from core-reflected shear-waves for anisotropy in the Earth's mantle. Nature 1984, 309:695-698.
20. Garnero E.J., Lay T. Lateral variations in lowermost mantle shear wave anisotropy beneath the north Pacific and Alaska. J. Geophys. Res. 1997, 102:8121-8135.
21. Garnero E.J., Lay T. D″ shear velocity heterogeneity, anisotropy and discontinuity structure beneath the Caribbean and Central America. Phys. Earth Planet. Inter. 2003, 140:219-242.
22. Garnero E.J., Maupin V., Lay T., Fouch M.J. Variable azimuthal anisotropy in Earth's lowermost mantle. Science 2004, 306:259-261.
23. Garnero E.J., Moore M., Lay T., Fouch M.J. Isotropy or weak vertical transverse isotropy in D″ beneath the Atlantic Ocean. J. Geophys. Res. 2004, 109:B08308.
24. Garnero E.J., Revenaugh J., Williams Q., Lay T., Kellogg L. Ultralow velocity zone at the core-mantle boundary. Geodynamics Series 1998, 28:319-334. American Geophysical Union, Washington, D.C., USA. M. Gurnis, M.E. Wysession, E. Knittle, B.A. Buffett (Eds.).
25. Guignot N., Andrault D., Morard G., Bolfan-Casanova N., Mezouar M. Thermoelastic properties of post-perovskite phase MgSiO3 determined experimentally at core-mantle boundary P-T conditions. Earth Planet. Sci. Lett. 2007, 256:162-168.
26. Hall S., Kendall J.M. Constraining the interpretation of AVOA for fracture characterisation. Anisotropy 2000: Fractures Converted Waves, and Case Studies. Proceedings of 9th International Workshop on Seismic Anisotropy (9IWSA), vol. 6 2001, 107-144. Open File Publications. L. Ikelle, A. Gangi (Eds.).
27. Hall S., Kendall J.M., van der Baan M. Some comments on the effects of lower-mantle anisotropy on SKS and SKKS phases. Phys. Earth Planet. Inter. 2004, 146:469-481.
28. Hedlin M., Shearer P., Earle P. Seismic evidence for small-scale heterogeneity throughout the Earth's mantle. Nature 1997, 387:145-150.
29. Hernlund J.W. On the interaction of the geotherm with a post-perovskite phase transition in the deep mantle. Phys. Earth Planet. Inter. 2010, 180:222-234.
30. Hernlund J.W., Thomas C., Tackley P.J. A doubling of the post-perovskite phase boundary and structure of the Earth's lowermost mantle. Nature 2005, 434:882-886.
31. Hirose K. Postperovskite phase transition and its geophysical implications. Rev. Geophys. 2006, 44:RG3001.
32. Hirose K. Discovery of post-perovskite phase transition and the nature of D″ layer. Post-Perovksite: The Last Mantle Phase Transition 2007, 19-35. American Geophysical Union. Geophysical Monograph. K. Hirose, J. Brodholt, T. Lay, D.A. Yuen (Eds.).
33. Hirose K., Fei Y., Ma Y., Mao H. The fate of subducted basaltic crust in the Earth's lower mantle. Nature 1999, 397:53-56.
34. Hirose K., Nagaya Y., Merkel S., Ohishi Y. Deformation of MnGeO3 post-perovskite at lower mantle pressure and temperature. Geophys. Res. Lett. 2010, 37:1-5.
35. Hirose K., Sinmyo R., Sata N., Ohishi Y. Determination of post-perovskite phase transition boundary in MgSiO3 using Au and MgO pressure standards. Geophys. Res. Lett. 2006, 33:L01310.
36. Hirose K., Takafuji N., Sata N., Ohishi Y. Phase transition and density of subducted MORB crust in the lower mantle. Earth Planet. Sci. Lett. 2005, 237:239-251.
37. Holtzman B., Groebner N., Zimmerman M., Ginsberg S., Kohlstedt D. Stress-driven melt segregation in partially molten rocks. Geochem. Geophys. Geosyst. 2003, 4:8607.
38. Holtzman B., Kohlstedt D., Zimmerman M., Heidelbach F., Hiraga T., Hustoft J.W. Melt segregation and strain partitioning: Implications for seismic anisotropy and mantle flow. Science 2003, 301:1227-1230.
39. Holtzman B.K., Kendall J.M. Organized melt, seismic anisotropy, and plate boundary lubrication. Geochem. Geophys. Geosyst. 2010, 11. Q0AB06.
40. Hudson J. The Excitation and Propagation of Elastic Waves 1980, Cambridge University Press, Cambridge, U.K.
41. Hudson J. Overall properties of a cracked solid. Math. Proc. Camb. Phil. Soc. 1980, 88:371-384.
42. Iitaka T., Hirose K., Kawamura K., Murakami M. The elasticity of the MgSiO3 post-perovskite phase in the Earth's lowermost mantle. Nature 2004, 430:442-445.
43. Karato S. Some remarks on the origin of seismic anisotropy in the D″ layer. Earth Planets Space 1998, 50:1019-1028.
44. Karki B., Stixrude L., Crain J. Ab initio elasticity of three high-pressure polymorphs of silica. Geophys. Res. Lett. 1997, 24:3269-3272.
45. Karki B., Warren M., Stixrude L., Ackland G., Crain J. Ab initio studies of high-pressure structural transformations in silica. Phys. Rev. B 1997, 55:3465-3471.
46. Karki B., Wentzcovitch R., de Gironcoli S., Baroni S. First-principles determination of elastic anisotropy and wave velocities of MgO at lower mantle conditions. Science 1999, 286:1705-1707.
47. Kawai K., Geller R.J. The vertical flow in the lowermost mantle beneath the Pacific from inversion of seismic waveforms for anisotropic structure. Earth Planet. Sci. Lett. 2010, 297:190-198.
48. Kendall J.M. Seismic anisotropy in the boundary layers of the mantle. Geophysical Monograph 2000, vol. 17:133-159. American Geophysical Union, Washington, D.C., USA. S. Karato, A. Forte, R.C. Liebermann, G. Masters, L. Stixrude (Eds.).
49. Kendall J.M., Nangini C. Lateral variations in D″ below the Caribbean. Geophys. Res. Lett. 1996, 23:399-402.
50. Kendall J.M., Silver P.G. Constraints from seismic anisotropy on the nature of the lowermost mantle. Nature 1996, 381:409-412.
51. Kendall J.M., Silver P.G. Investigating causes of D″ anisotropy. Geodynamics Series 1998, 28:97-118. American Geophysical Union, Washington, D.C., USA. M. Gurnis, M.E. Wysession, E. Knittle, B.A. Buffett (Eds.).
52. Kennett B., Engdahl E., Buland R. Constraints on seismic velocities in the Earth from travel-times. Geophys. J. Int. 1995, 122:108-124.
53. Kesson S., Gerald J.F., Shelley J. Mineralogy and dynamics of a pyrolite lower mantle. Nature 1998, 393:252-255.
54. Knittle E., Jeanloz R. Synthesis and equation of state of (Mg,Fe)SiO3 perovskite to over 100 gigapascals. Science 1987, 235:668-670.
55. Koci L., Vitos L., Ahuja R. Ab initio calculations of the elastic properties of ferropericlase Mg1-xFexO (x ≤ 0.25). Phys. Earth Planet. Inter. 2007, 164:177-185.
56. Kohlstedt D., Zimmerman M. Rheology of partially molten mantle rocks. Annu. Rev. Earth Planet. Sci. 1996, 24:41-62.
57. Kohn W., Sham L. Self-consistent equations including exchange and correlation effects. Phys. Rev. 1965, 140:A1133-A1138.
58. Komabayashi T., Hirose K., Nagaya Y., Sugimura E., Ohishi Y. High-temperature compression of ferropericlase and the effect of temperature on iron spin transition. Earth Planet. Sci. Lett. 2010, 297:691-699.
59. Komatitsch D., Vinnik L.P., Chevrot S. SHdiff-SVdiff splitting in an isotropic Earth. J. Geophys. Res. 2010, 115:B07312.
60. Kubo A., Kiefei B., Shim S.H., Shen G., Prakapenka V.B., Duffy T.S. Rietveld structure refinement of MgGeO3 post-perovskite phase to 1Mbar. Am. Mineral. 2008, 93:965-976.
61. Kustowski B., Ekstrom G., Dziewonski A. Anisotropic shear-wave velocity structure of the Earth's mantle: a global model. J. Geophys. Res.-Sol. Earth Planets 2008, 113:B06306.
62. Lay T., Helmberger D. The shear-wave velocity-gradient at the base of the mantle. J. Geophys. Res. 1983, 88:8160-8170.
63. Lay T., Williams Q., Garnero E.J., Kellogg L., Wysession M.E. Seismic wave anisotropy in the D″ region and its implications. Geodynamics Series 1998, vol. 28:299-318. American Geophysical Union, Washington, D.C., USA. M. Gurnis, M.E. Wysession, E. Knittle, B.A. Buffett (Eds.).
64. Lay T., Young C. Analysis of seismic SV waves in the core's penumbra. Geophys. Res. Lett. 1991, 18:1373-1376.
65. Lebensohn R., Tomé C. A self-consistent anisotropic approach for the simulation of plastic-deformation and texture development of polycrystals-application to zirconium alloys. Acta Metall. Mater. 1993, 41:2611-2624.
66. Lekić V., Panning M., Romanowicz B. A simple method for improving crustal corrections in waveform tomography. Geophys. J. Int. 2010, 182:265-278.
67. Li L., Weidner D.J., Brodholt J.P., Alfe D., Price G.D., Caracas R., Wentzcovitch R. Elasticity of CaSiO3 perovskite at high pressure and high temperature. Phys. Earth Planet. Inter. 2006, 155:249-259.
68. Li L., Weidner D.J., Brodholt J.P., Alfe D., Price G.D., Caracas R., Wentzcovitch R. Phase stability of CaSiO3 perovskite at high pressure and temperature: Insights from ab initio molecular dynamics. Phys. Earth Planet. Inter. 2006, 155:260-268.
69. Lin J.F., Tsuchiya T. Spin transition of iron in the Earth's lower mantle. Phys. Earth Planet. Inter. 2008, 170:248-259.
70. Lithgow-Bertelloni C., Richards M. The dynamics of Cenozoic and Mesozoic plate motions. Rev. Geophys. 1998, 36:27-78.
71. Long M.D. Complex anisotropy in D″ beneath the eastern Pacific from SKS-SKKS splitting discrepancies. Earth Planet. Sci. Lett. 2009, 283:181-189.
72. Long M.D., Xiao X., Jiang Z., Evans B., Karato S. Lattice preferred orientation in deformed polycrystalline (Mg,Fe)O and implications for seismic anisotropy in D″. Phys. Earth Planet. Inter. 2006, 156:75-88.
73. Mainprice D., Silver P. Interpretation of SKS-waves using samples from the subcontinental lithosphere. Phys. Earth Planet. Inter. 1993, 78:257-280.
74. Mainprice D., Tommasi A., Ferré D., Carrez P., Cordier P. Predicted glide systems and crystal preferred orientations of polycrystalline silicate Mg-perovskite at high pressure: implications for the seismic anisotropy in the lower mantle. Earth Planet. Sci. Lett. 2008, 271:135-144.
75. Mao W.L., Meng Y., Mao H. Elastic anisotropy of ferromagnesian post-perovskite in Earth's D″ layer. Phys. Earth Planet. Inter. 2010, 180:203-208.
76. Marquardt H., Speziale S., Reichmann H.J., Frost D.J., Schilling F.R. Single-crystal elasticity of (Mg0.9Fe0.1)O to 81GPa. Earth Planet. Sci. Lett. 2009, 287:345-352.
77. Matzel E., Sen M., Grand S.P. Evidence for anisotropy in the deep mantle beneath Alaska. Geophys. Res. Lett. 1996, 23:2417-2420.
78. Maupin V. On the possibility of anisotropy in the D″ layer as inferred from the polarization of diffracted S waves. Phys. Earth Planet. Inter. 1994, 87:1-32.
79. Maupin V., Garnero E.J., Lay T., Fouch M.J. Azimuthal anisotropy in the D″ layer beneath the Caribbean. J. Geophys. Res. 2005, 110:B08301.
80. McDonough W., Sun S. The composition of the Earth. Chem. Geol. 1995, 120:223-253.
81. McNamara A., van Keken P., Karato S. Development of anisotropic structure in the Earth's lower mantle by solid-state convection. Nature 2002, 416:310-314.
82. McNamara A.K., van Keken P., Karato S. Development of finite strain in the convecting lower mantle and its implications for seismic anisotropy. J. Geophys. Res. 2003, 108:2230.
83. Meade C., Silver P.G., Kaneshima S. Laboratory and seismological observations of lower mantle isotropy. Geophys. Res. Lett. 1995, 22:1293-1296.
84. Merkel S., Kubo A., Miyagi L., Speziale S., Duffy T.S., Mao H., Wenk H.R. Plastic deformation of MgGeO3 post-perovskite at lower mantle pressures. Science 2006, 311:644-646.
85. Merkel S., McNamara A.K., Kubo A., Speziale S., Miyagi L., Meng Y., Duffy T.S., Wenk H.R. Deformation of (Mg,Fe)SiO3 post-perovskite and D″ anisotropy. Science 2007, 316:1729-1732.
86. Merkel S., Wenk H.R., Badro J., Montagnac G., Gillet P., Mao H., Hemley R. Deformation of (Mg0.9Fe0.1)SiO3 perovskite aggregates up to 32GPa. Earth Planet. Sci. Lett. 2003, 209:351-360.
87. Merkel S., Wenk H.R., Shu J., Shen G., Gillet P., Mao H., Hemley R. Deformation of polycrystalline MgO at pressures of the lower mantle. J. Geophys. Res.-Sol. Earth Planets 2002, 107:2271.
88. Metsue, A., Carrez, P., Mainprice, D., Cordier, P., 2009. Numerical modelling of dislocations and deformation mechanisms in CaIrO3 and MgGeO3 post-perovskites-comparison with MgSiO3 post-perovskite. Phys. Earth Planet. Inter. 174, 165-173.
89. Mitrovica J.X., Forte A.M. A new inference of mantle viscosity based upon joint inversion of convection and glacial isostatic adjustment data. Earth Planet. Sci. Lett. 2004, 225:177-189.
90. Miyagi L., Kanitpanyacharoen W., Kaercher P., Lee K.K.M., Wenk H.R. Slip systems in MgSiO3 post-perovskite: implications for D″ anisotropy. Science 2010, 329:1639-1641.
91. Miyagi L., Nishlyama N., Wang Y., Kubo A., West D.V., Cava R.J., Duffy T.S., Wenk H.R. Deformation and texture development in CaIrO3 post-perovskite phase up to 6GPa and 1300K. Earth Planet. Sci. Lett. 2008, 268:515-525.
92. Montagner J.P., Kennett B. How to reconcile body-wave and normal-mode reference earth models. Geophys. J. Int. 1996, 125:229-248.
93. Montelli R., Nolet G., Dahlen F., Masters G., Engdahl E., Hung S. Finite-frequency tomography reveals a variety of plumes in the mantle. Science 2004, 303:338-343.
94. Moore M., Garnero E.J., Lay T., Williams Q. Shear wave splitting and waveform complexity for lowermost mantle structures with low-velocity lamellae and transverse isotropy. J. Geophys. Res. 2004, 109:B02319.
95. Murakami M., Hirose K., Kawamura K., Sata N., Ohishi Y. Post-perovskite phase transition in MgSiO3. Science 2004, 304:855-858.
96. Murakami M., Hirose K., Sata N., Ohishi Y. Post-perovskite phase transition and mineral chemistry in the pyrolitic lowermost mantle. Geophys. Res. Lett. 2005, 32:L03304.
97. Niu F., Perez A. Seismic anisotropy in the lower mantle: a comparison of waveform splitting of SKS and SKKS. Geophys. Res. Lett. 2004, 31:L24612.
98. Niwa K., Yagi T., Ohgushi K., Merkel S., Miyajima N., Kikegawa T. Lattice preferred orientation in CaIrO3 perovskite and post-perovskite formed by plastic deformation under pressure. Phys. Chem. Miner. 2007, 34:679-686.
99. Nowacki A., Wookey J., Kendall J.M. Deformation of the lowermost mantle from seismic anisotropy. Nature 2010, 467:1091-1094.
100. Nye J. Physical Properties of Crystals: Their Representation by Tensors and Matrices 1985, Oxford Science Publications/Clarendon Press.
101. Oganov A., Brodholt J., Price G. The elastic constants of MgSiO3 perovskite at pressures and temperatures of the Earth's mantle. Nature 2001, 411:934-937.
102. Oganov A., Martonak R., Laio A., Raiteri P., Parrinello M. Anisotropy of Earth's D″ layer and stacking faults in the MgSiO3 post-perovskite phase. Nature 2005, 438:1142-1144.
103. Oganov A., Ono S. Theoretical and experimental evidence for a post-perovskite phase of MgSiO3 in Earth's D″ layer. Nature 2004, 430:445-448.
104. Ohta K., Hirose K., Lay T., Sata N., Ohishi Y. Phase transitions in pyrolite and MORB at lowermost mantle conditions: Implications for a MORB-rich pile above the core-mantle boundary. Earth Planet. Sci. Lett. 2008, 267:107-117.
105. Ohtani E., Sakai T. Recent advances in the study of mantle phase transitions. Phys. Earth Planet. Inter. 2008, 170:240-247.
106. Okada T., Yagi T., Niwa K., Kikegawa T. Lattice-preferred orientations in post-perovskite-type MgGeO3 formed by transformations from different pre-phases. Phys. Earth Planet. Inter. 2010, 180:195-202.
107. Ono S., Ito E., Katsura T. Mineralogy of subducted basaltic crust (MORB) from 25 to 37GPa, and chemical heterogeneity of the lower mantle. Earth Planet. Sci. Lett. 2001, 190:57-63.
108. Ono S., Oganov A. In situ observations of phase transition between perovskite and CaIrO3-type phase in MgSiO3 and pyrolitic mantle composition. Earth Planet. Sci. Lett. 2005, 236:914-932.
109. Panning M., Romanowicz B. Inferences on flow at the base of Earth's mantle based on seismic anisotropy. Science 2004, 303:351-353.
110. Panning M., Romanowicz B. A three-dimensional radially anisotropic model of shear velocity in the whole mantle. Geophys. J. Int. 2006, 167:361-379.
111. Perdew J.P., Ruzsinszky A. Density functional theory of electronic structure: a short course for mineralogists and geophysicists. Reviews in Mineralogy & Geochemistry 2010, vol. 71:1-18. R. Wentzcovitch, L. Stixrude (Eds.).
112. Pulliam J., Sen M. Seismic anisotropy in the core-mantle transition zone. Geophys. J. Int. 1998, 135:113-128.
113. Restivo A., Helffrich G. Core-mantle boundary structure investigated using SKS and SKKS polarization anomalies. Geophys. J. Int. 2006, 165:288-302.
114. Ricolleau A., Fei Y., Cottrell E., Watson H., Deng L., Zhang L., Fiquet G., Auzende A.L., Roskosz M., Morard G., Prakapenka V.B. Density profile of pyrolite under the lower mantle conditions. Geophys. Res. Lett. 2009, 36:L06302.
115. Ringwood A. A model for the upper mantle. J. Geophys. Res. 1962, 67:857-867.
116. Ritsema J. Evidence for shear velocity anisotropy in the lowermost mantle beneath the Indian Ocean. Geophys. Res. Lett. 2000, 27:1041-1044.
117. Ritsema J., van Heijst H., Woodhouse J.H. Complex shear wave velocity structure imaged beneath Africa and Iceland. Science 1999, 286:1925-1928.
118. Ritsema J., Lay T., Garnero E.J., Benz H. Seismic anisotropy in the lowermost mantle beneath the Pacific. Geophys. Res. Lett. 1998, 25:1229-1232.
119. Rokosky J.M., Lay T., Garnero E.J. Small-scale lateral variations in azimuthally anisotropic D″ structure beneath the Cocos Plate. Earth Planet. Sci. Lett. 2006, 248:411-425.
120. Rokosky J.M., Lay T., Garnero E.J., Russell S. High-resolution investigation of shear wave anisotropy in D″ beneath the Cocos Plate. Geophys. Res. Lett. 2004, 31:L07605.
121. Royer D., Dieulesaint E. Elastic Waves in Solids I: Free and Guided Propagation. Advanced Texts in Physics 2000, Springer.
122. Russell S., Lay T., Garnero E.J. Seismic evidence for small-scale dynamics in the lowermost mantle at the root of the Hawaiian hotspot. Nature 1998, 396:255-258.
123. Russell S., Lay T., Garnero E.J. Small-scale lateral shear velocity and anisotropy heterogeneity near the core-mantle boundary beneath the central Pacific imaged using broadband ScS waves. J. Geophys. Res. 1999, 104:13183-13199.
124. Rümpker G., Tommasi A., Kendall J.M. Numerical simulations of depth-dependent anisotropy and frequency-dependent wave propagation effects. J. Geophys. Res. 1999, 104:23141-23153.
125. Savage M. Seismic anisotropy and mantle deformation: What have we learned from shear wave splitting?. Rev. Geophys. 1999, 37:65-106.
126. Sayers C. Elastic anisotropy of short-fibre reinforced composites. Int. J. Solids Struct. 1992, 100:4149-4156.
127. Shim S.H. The postperovskite transition. Annu. Rev. Earth Planet. Sci. 2008, 36:569-599.
128. Silver P.G., Chan W.W. Shear-wave splitting and subcontinental mantle deformation. J. Geophys. Res. 1991, 96:16429-16454.
129. Silver P.G., Savage M. The interpretation of shear-wave splitting parameters in the presence of two anisotropic layers. Geophys. J. Int. 1994, 119:949-963.
130. Simmons N.A., Forte A.M., Grand S.P. Joint seismic, geodynamic and mineral physical constraints on three-dimensional mantle heterogeneity: implications for the relative importance of thermal versus compositional heterogeneity. Geophys. J. Int. 2009, 177:1284-1304.
131. Sinmyo R., Hirose K., Nishio-Hamane D., Seto Y., Fujino K., Sata N., Ohishi Y. Partitioning of iron between perovskite/postperovskite and ferropericlase in the lower mantle. J. Geophys. Res. 2008, 113:B11204.
132. Speziale S., Zha C., Duffy T., Hemley R., Mao H. Quasi-hydrostatic compression of magnesium oxide to 52 GPa: Implications for the pressure-volume-temperature equation of state. J. Geophys. Res. 2001, 106:515-528.
133. Stackhouse S., Brodholt J.P., Price G.D. High temperature elastic anisotropy of the perovskite and post-perovskite Al2O3. Geophys. Res. Lett. 2005, 32:L13305.
134. Stackhouse S., Brodholt J.P., Price G.D. Elastic anisotropy of FeSiO3 end-members of the perovskite and post-perovskite phases. Geophys. Res. Lett. 2006, 33:L01304.
135. Stackhouse S., Brodholt J.P., Wookey J., Kendall J.M., Price G.D. The effect of temperature on the seismic anisotropy of the perovskite and post-perovskite polymorphs of MgSiO3. Earth Planet. Sci. Lett. 2005, 230:1-10.
136. Stixrude L., de Koker N., Sun N., Mookherjee M., Karki B.B. Thermodynamics of silicate liquids in the deep Earth. Earth Planet. Sci. Lett. 2009, 278:226-232.
137. Stixrude L., Lithgow-Bertelloni C., Kiefer B., Fumagalli P. Phase stability and shear softening in CaSiO3 perovskite at high pressure. Phys. Rev. B 2007, 75:024108.
138. Tackley P. Mantle convection and plate tectonics: toward an integrated physical and chemical theory. Science 2000, 288:2002-2007.
139. Tanaka S. Constraints on the core-mantle boundary topography from P4KP-PcP differential travel times. J. Geophys. Res. 2010, 115:B04310.
140. Tandon G., Weng G. The effect of aspect ratio of inclusions on the elastic properties of unidirectionally aligned composites. Polym. Compos. 1984, 5:327-333.
141. Tateno S., Hirose K., Sata N., Ohishi Y. Determination of post-perovskite phase transition boundary up to 4400K and implications for thermal structure in D″ layer. Earth Planet. Sci. Lett. 2009, 277:130-136.
142. Teanby N., Kendall J.M., der Baan M.V. Automation of shear-wave splitting measurements using cluster analysis. B. Seismol. Soc. Am. 2004, 94:453-463.
143. Thomas C., Kendall J.M. The lowermost mantle beneath northern Asia-II. Evidence for lower-mantle anisotropy. Geophys. J. Int. 2002, 151:296-308.
144. Thomas C., Wookey J., Simpson M. D″ anisotropy beneath Southeast Asia. Geophys. Res. Lett. 2007, 34:L04301.
145. Thomsen L. Weak elastic anisotropy. Geophysics 1986, 51:1954-1966.
146. Tikoff B., Fossen H. Three-dimensional reference deformations and strain facies. J. Struct. Geol. 1999, 21:1497-1512.
147. Trampert J., Deschamps F., Resovsky J., Yuen D. Probabilistic tomography maps chemical heterogeneities throughout the lower mantle. Science 2004, 306:853-856.
148. Tromp J. Inner-core anisotropy and rotation. Annu. Rev. Earth Planet. Sci. 2001, 29:47-69.
149. Trønnes R.G. Structure, mineralogy and dynamics of the lowermost mantle. Miner. Petrol. 2010, 99:243-261.
150. Tsuchiya T. First-principles prediction of the P-V-T equation of state of gold and the 660-km discontinuity in Earth's mantle. J. Geophys. Res. 2003, 108:2462.
151. Tsuchiya T., Tsuchiya J., Umemoto K., Wentzcovitch R. Phase transition in MgSiO3 perovskite in the earth's lower mantle. Earth Planet. Sci. Lett. 2004, 224:241-248.
152. Usui Y., Hiramatsu Y., Furumoto M., Kanao M. Evidence of seismic anisotropy and a lower temperature condition in the D″ layer beneath Pacific Antarctic Ridge in the Antarctic Ocean. Phys. Earth Planet. Inter. 2008, 167:205-216.
153. Vinnik L.P., Breger L., Romanowicz B. Anisotropic structures at the base of the Earth's mantle. Nature 1998, 393:564-567.
154. Vinnik L.P., Kind R., Kosarev G., Makeyeva L. Azimuthal anisotropy in the lithosphere from observations of long-period S-waves. Geophys. J. Int. 1989, 99:549-559.
155. Vinnik L.P., Romanowicz B., Stunff Y.L., Makeyeva L. Seismic anisotropy in the D″ layer. Geophys. Res. Lett. 1995, 22:1657-1660.
156. Walker A., Carrez P., Cordier P. Atomic-scale models of dislocation cores in minerals: progress and prospects. Mineral. Mag. 2010, 74:381-413.
157. Walte N.P., Heidelbach F., Miyajima N., Frost D.J. Texture development and TEM analysis of deformed CaIrO3: Implications for the D″ layer at the core-mantle boundary. Geophys. Res. Lett. 2007, 34:L08306.
158. Walte N.P., Heidelbach F., Miyajima N., Frost D.J., Rubie D.C., Dobson D.P. Transformation textures in post-perovskite: Understanding mantle flow in the D″ layer of the Earth. Geophys. Res. Lett. 2009, 36:L04302.
159. Wang Y., Wen L. Complex seismic anisotropy at the border of a very low velocity province at the base of the Earth's mantle. J. Geophys. Res. 2007, 112:B09305.
160. Wenk H.R., Bennett K., Canova G., Molinari A. Modeling plastic-deformation of peridotite with the self-consistent theory. J. Geophys. Res. 1991, 96:8337-8349.
161. Wenk H.R., Speziale S., McNamara A.K., Garnero E.J. Modeling lower mantle anisotropy development in a subducting slab. Earth Planet. Sci. Lett. 2006, 245:302-314.
162. Wentzcovitch R., Karki B., Cococcioni M., de Gironcoli S. Thermoelastic properties of MgSiO3-perovskite: insights on the nature of the Earth's lower mantle. Phys. Rev. Lett. 2004, 92:018501.
163. Wentzcovitch R., Tsuchiya T., Tsuchiya J. MgSiO3 postperovskite at D″ conditions. Proc. Natl. Acad. Sci. U.S.A. 2006, 103:543-546.
164. Wookey J., Kendall J.M. Seismic anisotropy of post-perovskite and the lowermost mantle. Post-Perovksite: The Last Mantle Phase Transition 2007, 171-189. Geophysical Monograph 174, American Geophysical Union, Washington, D.C., USA. K. Hirose, J. Brodholt, T. Lay, D.A. Yuen (Eds.).
165. Wookey J., Kendall J.M. Constraints on lowermost mantle mineralogy and fabric beneath Siberia from seismic anisotropy. Earth Planet. Sci. Lett. 2008, 275:32-42.
166. Wookey J., Kendall J.M., Rumpker G. Lowermost mantle anisotropy beneath the north Pacific from differential S-ScS splitting. Geophys. J. Int. 2005, 161:829-838.
167. Wookey J., Stackhouse S., Kendall J.M., Brodholt J.P., Price G.D. Efficacy of the post-perovskite phase as an explanation for lowermost-mantle seismic properties. Nature 2005, 438:1004-1007.
168. Wysession M., Langenhorst A., Fouch M.J., Fischer K.M., Al-Eqabi G., Shore P., Clarke T. Lateral variations in compressional/shear velocities at the base of the mantle. Science 1999, 284:120-125.
169. Wysession M.E., Lay T., Revenaugh J., Williams Q., Garnero E.J., Jeanloz R., Kellogg L. The D″ discontinuity and its implications. Geodynamics Series 1998, 28:273-298. American Geophysical Union, Washington, D.C., USA. M. Gurnis, M.E. Wysession, E. Knittle, B.A. Buffett (Eds.).
170. Yamazaki D., Karato S. Fabric development in (Mg,Fe)O during large strain, shear deformation: implications for seismic anisotropy in Earth's lower mantle. Phys. Earth Planet. Inter. 2002, 131:251-267.
171. Yamazaki, D., Karato, S., 2007. Lattice-preferred orientation of lower mantle materials and seismic anisotropy in the D″ layer. In: Post-Perovksite: The Last Mantle Phase Transition. Geophysical Monograph 174. American Geophysical Union, Washington, D.C., USA, pp. 69-78.
172. Yamazaki D., Yoshino T., Ohfuji H., Ando J., Yoneda A. Origin of seismic anisotropy in the D′′ layer inferred from shear deformation experiments on post-perovskite phase. Earth Planet. Sci. Lett. 2006, 252:372-378.