-
2
-
-
0029666565
-
-
diffKS and short-period PcP precursors) over extended distance ranges.
-
(1996)
Geophys. Res. Lett.
, vol.23
, pp. 977
-
-
-
9
-
-
0025665976
-
-
2 is unlikely to be present in mantle assemblages that have not undergone reactions with core material (16).
-
(1990)
Nature
, vol.347
, pp. 267
-
-
Tsuchida, Y.1
Yagi, T.2
-
11
-
-
0000267690
-
-
2 content increases the average K of silicate liquids, whereas more magnesian melts are likely to be more compressible (23). Therefore, we consider that such estimates of the elasticity of the melt may provide a lower bound on the true value of K. As the K of the solid mantle at CMB conditions in the Preliminary Reference Earth Model model is about 653 GPa (12), we treat the K of the liquid as equivalent to that of the mantle at these depths. Our simulations are not particularly sensitive to this assumption.
-
(1987)
J. Geophys. Res.
, vol.92
, pp. 9247
-
-
Rivers, M.L.1
Carmichael, I.S.E.2
-
12
-
-
0026306606
-
-
2 content increases the average K of silicate liquids, whereas more magnesian melts are likely to be more compressible (23). Therefore, we consider that such estimates of the elasticity of the melt may provide a lower bound on the true value of K. As the K of the solid mantle at CMB conditions in the Preliminary Reference Earth Model model is about 653 GPa (12), we treat the K of the liquid as equivalent to that of the mantle at these depths. Our simulations are not particularly sensitive to this assumption.
-
(1991)
Geophys. Res. Lett.
, vol.18
, pp. 1397
-
-
Secco, R.A.1
Manghnani, M.H.2
Liu, T.C.3
-
13
-
-
0025244742
-
-
2 content increases the average K of silicate liquids, whereas more magnesian melts are likely to be more compressible (23). Therefore, we consider that such estimates of the elasticity of the melt may provide a lower bound on the true value of K. As the K of the solid mantle at CMB conditions in the Preliminary Reference Earth Model model is about 653 GPa (12), we treat the K of the liquid as equivalent to that of the mantle at these depths. Our simulations are not particularly sensitive to this assumption.
-
(1990)
Geophys. Res. Lett.
, vol.17
, pp. 635
-
-
Williams, Q.1
-
14
-
-
0003163831
-
-
M. Manghnani and Y. Syono, Eds. American Geophysical Union, Washington, DC
-
2 content increases the average K of silicate liquids, whereas more magnesian melts are likely to be more compressible (23). Therefore, we consider that such estimates of the elasticity of the melt may provide a lower bound on the true value of K. As the K of the solid mantle at CMB conditions in the Preliminary Reference Earth Model model is about 653 GPa (12), we treat the K of the liquid as equivalent to that of the mantle at these depths. Our simulations are not particularly sensitive to this assumption.
-
(1992)
High Pressure Research in Earth and Planetary Sciences
, pp. 315-322
-
-
Ito, E.1
Katsura, T.2
-
19
-
-
0011264624
-
-
M. Manghnani and Y. Syono, Eds, American Geophysical Union, Washington, DC
-
J. M. Brown, M. D. Furnish, R. G. McQueen, in High Pressure Research in Mineral Physics, M. Manghnani and Y. Syono, Eds, (American Geophysical Union, Washington, DC, 1987), pp. 373-384; S. M. Rigden, T. J. Ahrens, E. M. Stolper. Science 226, 1071 (1984). The relative density of the liquid will also be increased if Fe partitions into the melt relative to coexisting solids, as it does to pressures of 25 GPa [C. Herzberg and J. Zhang, J. Geophys. Res. 101, 8271 (1996)]. The small changes in volume observed on melting of silicates under shock loading, coupled with possible Fe enrichment of the liquid, are consistent with neutrally or negatively buoyant silicate liquids under deep mantle conditions.
-
(1987)
High Pressure Research in Mineral Physics
, pp. 373-384
-
-
Brown, J.M.1
Furnish, M.D.2
McQueen, R.G.3
-
20
-
-
0021561106
-
-
J. M. Brown, M. D. Furnish, R. G. McQueen, in High Pressure Research in Mineral Physics, M. Manghnani and Y. Syono, Eds, (American Geophysical Union, Washington, DC, 1987), pp. 373-384; S. M. Rigden, T. J. Ahrens, E. M. Stolper. Science 226, 1071 (1984). The relative density of the liquid will also be increased if Fe partitions into the melt relative to coexisting solids, as it does to pressures of 25 GPa [C. Herzberg and J. Zhang, J. Geophys. Res. 101, 8271 (1996)]. The small changes in volume observed on melting of silicates under shock loading, coupled with possible Fe enrichment of the liquid, are consistent with neutrally or negatively buoyant silicate liquids under deep mantle conditions.
-
(1984)
Science
, vol.226
, pp. 1071
-
-
Rigden, S.M.1
Ahrens, T.J.2
Stolper, E.M.3
-
21
-
-
0029772078
-
-
J. M. Brown, M. D. Furnish, R. G. McQueen, in High Pressure Research in Mineral Physics, M. Manghnani and Y. Syono, Eds, (American Geophysical Union, Washington, DC, 1987), pp. 373-384; S. M. Rigden, T. J. Ahrens, E. M. Stolper. Science 226, 1071 (1984). The relative density of the liquid will also be increased if Fe partitions into the melt relative to coexisting solids, as it does to pressures of 25 GPa [C. Herzberg and J. Zhang, J. Geophys. Res. 101, 8271 (1996)]. The small changes in volume observed on melting of silicates under shock loading, coupled with possible Fe enrichment of the liquid, are consistent with neutrally or negatively buoyant silicate liquids under deep mantle conditions.
-
(1996)
J. Geophys. Res.
, vol.101
, pp. 8271
-
-
Herzberg, C.1
Zhang, J.2
-
22
-
-
0001907554
-
-
M. Manghnani and Y. Syono, Eds. American Geophysical Union, Washington, DC
-
S. Urukawa, M. Kato, M. Kumazawa, in High Pressure Research in Mineral Physics, M. Manghnani and Y. Syono, Eds. (American Geophysical Union, Washington, DC, 1987), pp. 95-111; W. G. Minarik, F. J. Ryerson, E. B. Watson, Science 272, 530 (1996).
-
(1987)
High Pressure Research in Mineral Physics
, pp. 95-111
-
-
Urukawa, S.1
Kato, M.2
Kumazawa, M.3
-
23
-
-
0029751149
-
-
S. Urukawa, M. Kato, M. Kumazawa, in High Pressure Research in Mineral Physics, M. Manghnani and Y. Syono, Eds. (American Geophysical Union, Washington, DC, 1987), pp. 95-111; W. G. Minarik, F. J. Ryerson, E. B. Watson, Science 272, 530 (1996).
-
(1996)
Science
, vol.272
, pp. 530
-
-
Minarik, W.G.1
Ryerson, F.J.2
Watson, E.B.3
-
28
-
-
0028558157
-
-
2-bearing or, if magnesiowüstite was initially present, perovskite-enriched phase assemblage (see Eq. 1).
-
(1995)
Physica B
, vol.199
, pp. 478
-
-
Sarrao, J.L.1
-
29
-
-
0028769664
-
-
2-bearing or, if magnesiowüstite was initially present, perovskite-enriched phase assemblage (see Eq. 1).
-
(1994)
Science
, vol.266
, pp. 1678
-
-
Fei, Y.1
Mao, H.-K.2
-
30
-
-
0026452803
-
-
Our calculation is not corrected for the effect of temperature; because we are calculating percentage changes in velocity, temperature will only alter the results of Fig. 4 if the temperature derivatives of the elastic properties of the assemblages in Eq. 1 are different under CMB conditions. However, the temperature derivatives of both the elastic moduli and their pressure derivatives are likely to be small under CMB conditions [T. S. Duffy and T. J. Ahrens, J. Geophys. Res. 97, 4503 (1992)].
-
(1992)
J. Geophys. Res.
, vol.97
, pp. 4503
-
-
Duffy, T.S.1
Ahrens, T.J.2
-
31
-
-
0020345298
-
-
S. Akimoto and M. Manghnani, Eds. Reidel, Dordrecht, Netherlands
-
J. M. Brown and R. G. McQueen, in High Pressure Research in Geophysics, S. Akimoto and M. Manghnani, Eds. (Reidel, Dordrecht, Netherlands, 1982), pp. 611-623.
-
(1982)
High Pressure Research in Geophysics
, pp. 611-623
-
-
Brown, J.M.1
McQueen, R.G.2
-
32
-
-
0000567067
-
-
K. Bataille, R. S. Wu, S. M. Flatte, Pure Appl. Geophys. 132, 151 (1990); F. Kruger, M. Weber, F. Scherbaum, J. Schlittenhardt, Geophys. J. Int. 122, 637 (1995).
-
(1990)
Pure Appl. Geophys.
, vol.132
, pp. 151
-
-
Bataille, K.1
Wu, R.S.2
Flatte, S.M.3
-
33
-
-
0029479614
-
-
K. Bataille, R. S. Wu, S. M. Flatte, Pure Appl. Geophys. 132, 151 (1990); F. Kruger, M. Weber, F. Scherbaum, J. Schlittenhardt, Geophys. J. Int. 122, 637 (1995).
-
(1995)
Geophys. J. Int.
, vol.122
, pp. 637
-
-
Kruger, F.1
Weber, M.2
Scherbaum, F.3
Schlittenhardt, J.4
-
35
-
-
0027449638
-
-
Q. Williams and R. Jeanloz, J. Geophys. Res. 95, 19299 (1990); R. Boehler, Nature 363, 534 (1993).
-
(1993)
Nature
, vol.363
, pp. 534
-
-
Boehler, R.1
-
36
-
-
0024193953
-
-
F. Guyot, M. Madon, J. Peyronneau, J. P. Poirier, Earth Planet. Sci. Lett. 90, 52 (1988).
-
(1988)
Earth Planet. Sci. Lett.
, vol.90
, pp. 52
-
-
Guyot, F.1
Madon, M.2
Peyronneau, J.3
Poirier, J.P.4
-
38
-
-
0002296384
-
-
American Geophysical Union, Washington, DC
-
J. D. Bass, in AGU Handbook of Physical Constants (American Geophysical Union, Washington, DC, 1995), vol. 2, pp. 45-63.
-
(1995)
AGU Handbook of Physical Constants
, vol.2
, pp. 45-63
-
-
Bass, J.D.1
-
39
-
-
9544247787
-
-
note
-
We thank R. Jeanloz, T. Lay, and the reviewers for comments; R. Jeanloz, L. Kellogg, E. Knittle, and T. Lay for discussions. This research was supported by the National Science Foundation and the W. M. Keck Foundation. This is Institute of Tectonics contribution 303.
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