Grain growth kinetics of majorite and stishovite in MORB

Daisuke Yamazaki, Takuya Matsuzaki, Takashi Yoshino, Daisuke Suetsugu, Craig Bina, Toru Inoue, Douglas Wiens, Mark Jellinek

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Grain growth rates of majorite and stishovite, in their aggregates with MORB composition, were studied at 18GPa and temperatures ranging from 1873 to 2223K. The rates of grain growth were expressed by Gn-G0n=k0t exp(-H*/RT) where G is the grain size at time t (s), and G0 is the initial grain size. We determined the grain growth kinetic parameters for majorite, where n=9.1±1.3, H*=950±249kJ/mol, and logk0=-32.5±2.3m9.1/s for the graphite capsule and logk0=-31.3±3.9m9.1/s for the Re capsule. Kinetic parameters for stishovite were determined to be n=6.6±0.9, H*=599±226kJ/mol, and logk0=-30.6±0.9m6.6/s for the graphite capsule and logk0=-29.0±1.1m6.6/s for the Re capsule.

Original languageEnglish
Pages (from-to)183-189
Number of pages7
JournalPhysics of the Earth and Planetary Interiors
Volume183
Issue number1-2
DOIs
Publication statusPublished - Nov 2010

Keywords

  • Grain size
  • High-pressure experiment
  • Majorite
  • Stishovite

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Geophysics
  • Physics and Astronomy (miscellaneous)
  • Space and Planetary Science

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