Zobrazeno 1 - 8
of 8
pro vyhledávání: '"J. W. Hustoft"'
Autor:
Zhicheng Jing, J. W. Hustoft, G. Amulele, Shun-ichiro Karato, Kazuhiko Otsuka, Jun-ichi Ando, Zhixue Du
Publikováno v:
Earth and Planetary Science Letters. 361:7-15
We report the results of plastic deformation experiments on polycrystalline wadsleyite and ringwoodite performed at 15–23 GPa and 1300–2100 K conducted using the rotational Drickamer apparatus (RDA). Wadsleyite was synthesized from fine-grained (
Publikováno v:
American Mineralogist. 95:810-824
Droplets of an iron-bearing calcia magnesia aluminosilicate (Fe-CMAS) melt were reacted under distinctly reducing conditions ( f O2 = 2.4 × 10−13 and 6.4 × 10−15 atm) at high temperature (~1400 °C) and ambient pressure. The low f O2 environmen
Publikováno v:
American Mineralogist. 93:1654-1658
We have measured Raman spectra of the postperovskite (PPv) phase in CaIrO{sub 3} up to 30 GPa to constrain the Grueneisen parameter ({gamma}). We identified a total of 4 strong modes between 200 and 650 cm{sup -1}, which is in contrast with the Raman
Publikováno v:
Earth and Planetary Science Letters. 267:548-557
To determine the role of surface tension-driven melt migration in planetary bodies, we investigated the effect of static annealing on the evolution of melt-rich bands in partially molten samples. In shear deformation experiments, deviatoric stress ca
Autor:
Atsushi Kubo, J. W. Hustoft, Sang Heon Shim, Vitali B. Prakapenka, Krystle Catalli, W. A. Caldwell, Martin Kunz
Publikováno v:
Proceedings of the National Academy of Sciences of the United States of America. 105(21)
Intriguing seismic observations have been made for the bottom 400 km of Earth's mantle (the D″ region) over the past few decades, yet the origin of these seismic structures has not been well understood. Recent theoretical calculations have predicte
Autor:
Atsushi Kubo, J. W. Hustoft, Martin Kunz, Sang Heon Shim, Krystle Catalli, Vitali B. Prakapenka
Publikováno v:
Geophysical Research Letters. 35
[1] Recent first-principles calculations have proposed that bulk sound speed (VΦ) decreases at the perovskite (Pv) → postperovskite (PPv) transition. Yet some measurements suggest an increase in VΦ at the PPv transition in (Mg,Fe)SiO3 and NaMgF3.
Autor:
J. W. Hustoft, David L. Kohlstedt
Publikováno v:
Geochemistry, Geophysics, Geosystems. 7
We report the results of an investigation of the microstructural evolution of rocks composed of a silicate plus a molten metal sulfide phase deformed plastically in simple shear. Deformation experiments on samples of San Carlos olivine (Fo90) + 3, 5,
Autor:
David L. Kohlstedt, Takehiko Hiraga, Florian Heidelbach, J. W. Hustoft, Benjamin K. Holtzman, Mark E. Zimmerman
Publikováno v:
Science (New York, N.Y.). 301(5637)
One of the principal means of understanding upper mantle dynamics involves inferring mantle flow directions from seismic anisotropy under the assumption that the seismic fast direction (olivine a axis) parallels the regional flow direction. We demons