Metastable gamet in oceanic crust at the top of the lower mantle

Nature

Volumn 420, Issue 6917, 2002, Pages 803-806

  Kubo, Tomoaki ^a   Ohtani, Eiji ^a   Kondo, Tadashi ^a   Kato, Takumi ^b   Toma, Motomasa ^a   Hosoya, Tomofumi ^a   Sano, Asami ^a   Kikegawa, Takumi ^c   Nagase, Toshiro ^a  

^a TOHOKU UNIVERSITY   (Japan)

^b UNIVERSITY OF TSUKUBA   (Japan)

^c HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION KEK   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

BUOYANCY; DECOMPOSITION; PHASE EQUILIBRIA; SILICATES; TECTONICS;

GAMET; MANTLE;

OCEANOGRAPHY;

PEROVSKITE; SILICATE;

GARNET; LOWER MANTLE; OCEANIC CRUST; PHASE TRANSITION; SLAB; SUBDUCTION;

ARTICLE; BASALT; OBSERVATION; PRIORITY JOURNAL; SEA; TRANSMISSION ELECTRON MICROSCOPY; X RAY ANALYSIS;

EID: 0037180822     PISSN: 00280836     EISSN: None     Source Type: Journal    
DOI: 10.1038/nature01281     Document Type: Article

References (28)

1. Hirose, K., Fei, Y., Mao, H. K. The fate of subducted basaltic crust in the Earth's lower mantle. Nature 397, 53-56 (1999).
2. 12: Transition boundaries with positive pressure-temperature slopes. Phys. Earth Planet. Inter. 114, 129-140 (1999).
3. Irifune, T. & Ringwood, A. E. Phase transformations in subducted oceanic crust and buoyancy relationships at depths of 600-800 km in the mantle. Earth Planet. Sci. Lett. 117, 101-110 (1993).
4. Ringwood, A. E. Role of the transition zone and 660 km discontinuity in mantle dynamics. Phys. Earth Planet. Inter. 86, 5-24 (1994).
5. Kesson, S. E., Fitz Gerald, J. D. & Shelley, J. M. G. Mineral chemistry and density of subducted basaltic crust at lower-mantle pressures. Nature 372, 767-769 (1994).
6. Faust, J. & Knittle, E. The stability and equation of state of majoritic garnet synthesized from natural basalt at mantle conditions. Geophys. Res. Lett. 23, 3377-3380 (1996).
7. 4. Phys. Earth Planet. Inter. 129, 153-171 (2002).
8. Kawai, N. & Endo, S. The generation of ultrahigh hydrostatic pressures by a split sphere apparatus. Rev. Sci. Instrum. 41, 1178-1181 (1970).
9. Ohtani, E. et al. High pressure generartion by a multiple anvil system with sintered diamond anvils. Rev. Sci. Instrum. 60, 922-925, (1989).
10. Kondo, T. et al. Ultrahigh-pressure and high-temperature generation by use of the MA-8 system with sintered-diamond anvils. High Temp. High Press. 25, 105-112 (1993).
11. Kato, T., Ohtani, E., Kamaya, N., Shimomura, O. & Kikegawa, T. High Pressure Research in Mineral Physics: Application to Earth and Planetary Sciences (eds Syono, Y. & Manghnani, M. H.) 33-36 (Geophysical Monograph 67, American Geophysical Union, Washington DC, 1992).
12. 3 perovakite at 25 GPa by double-stage multianvil system. J. Geophys. Res. 100, 20475-20481 (1995).
13. 12: Implications for the nature of the seismic discontinuities in the Earth's mantle. Earth Planet. Sci. Lett. 184, 567-573 (2001).
14. Oguri, K. et al. Post-garnet transition in a natural pyrope: A multi-anvil study based on in situ X-ray diffraction and transmission electron microscopy. Phys. Earth Planet. Inter. 122, 175-186 (2000).
15. Miyajima, N., Fujino, K., Funamori, N., Kondo, T. & Yagi, T. Garnet-perovskite transformation under conditions of the Earth's lower mantle: An analytical transmission electron microscopy. Phys. Earth Planet. Inter. 116, 117-131 (1999).
16. Poirier, J. P., Peyronneau, J., Madon, M., Guyot, F. & Revcolevschi, A. Eutectoid phase transformation of olivine and spinel into perovskite and rock salt structures. Nature 321, 603-605 (1986).
17. 4. Geophys. Res. Lett. 27, 807-810 (2000).
18. Cahn, J. W. The kinetics of grain boundary nucleated reactions. Acta Metall, 4, 449-459 (1956).
19. Kirby, S. H., Stein, S., Okal, E. A. & Rubie, D. C. Metastable mantle phase transformations and deep earthquakes in subducting oceanic lithosphere. Rev. Geophys. 34, 261-306 (1996).
20. Riedel, M. R. & Karato, S. Grain-size evolution in subducted oceanic lithosphere associated with the olivine-spinel transformation and its effects on rheology. Earth Planet. Sci. Lett. 148, 27-43 (1997).
21. Ono, S., Ito, E. & Katsura, T. Mineralogy of subducted basaltic crust (MORB) from 25 to 37 GPa, and chemical heterogeneity of the lower mantle. Earth Planet. Sci. Lett. 190, 57-63 (2001).
22. Karato, S. On the separation of crustal component from subducted oceanic lithosphere near the 660 km discontinuity. Phys. Earth Planet. Inter. 99, 103-111 (1997).
23. Kawakatsu, H. & Niu, F. Seismic evidence for a 920-km discontinuity in the mantle. Nature 371, 301-305 (1994).
24. Niu, F. & Kawakatsu, H. Depth variation of the mid-mantle seismic discontinuity. Geophys. Res. Lett. 24, 429-432 (1997).
25. Pawley, A. R., McMillan, P. F. & Holloway, J. R. Hydrogen in stishovite, with implications for mantle water content. Science 261, 1024-1026 (1993).
26. Irifune, T. et al. Properties of Earth and Planetary Materials at High Pressure and Temperature (eds Manghnani, M. H. & Yagi, T.) 1-8 (Geophysical Monograph 101, American Geophysical Union, Washington DC, 1998).
27. Anderson, O. L., Issak, D. G. & Yamamoto, S. Anharmonicity and the equation state for gold. J. Appl. Phys. 6, 1534-1543 (1989).
28. Dziewonski, A. M. & Anderson, D. L. Preliminary reference Earth model. Phys. Earth Planet. Inter. 25, 297-356 (1981).