Now showing items 1-3 of 3

    • Effect of Fe3+ on Phase Relations in the Lower Mantle: Implications for Redox Melting in Stagnant Slabs 

      Sinmyo, RyosukeORCIDiD; Nakajima, YoichiORCIDiD; McCammon, Catherine A.ORCIDiD; Miyajima, NobuyoshiORCIDiD; Petitgirard, Sylvain; Myhill, RobertORCIDiD; Dubrovinsky, Leonid; Frost, Daniel J.ORCIDiD (Journal of Geophysical Research: Solid Earth, 2019)
      Recent studies have revealed that Earth's deep mantle may have a wider range of oxygen fugacities than previously thought. Such a large heterogeneity might be caused by material subducted into the deep mantle. However, ...
    • Oxygen Vacancy Substitution Linked to Ferric Iron in Bridgmanite at 27 GPa 

      Fei, HongzhanORCIDiD; Liu, ZhaodongORCIDiD; McCammon, CatherineORCIDiD; Katsura, TomooORCIDiD (Geophysical Research Letters, 2020)
      Ferric iron can be incorporated into the crystal structure of bridgmanite by either oxygen vacancy substitution (MgFeO2.5 component) or charge-coupled substitution (FeFeO3 component) mechanisms. We investigated the ...
    • Stability and Solubility of the FeAlO3 Component in Bridgmanite at Uppermost Lower Mantle Conditions 

      Liu, ZhaodongORCIDiD; McCammon, CatherineORCIDiD; Wang, Biao; Dubrovinsky, Leonid; Ishii, TakayukiORCIDiD; Bondar, Dmitry; Nakajima, Ayano; Tange, YoshinoriORCIDiD; Higo, YujiORCIDiD; Cui, Tian; Liu, Bingbing; Katsura, TomooORCIDiD (Journal of Geophysical Research: Solid Earth, 2020)
      We report the stability and solubility of the FeAlO3 component in bridgmanite based on phase relations in the system MgSiO3-FeAlO3 at 27 GPa and 2000 K using a multi-anvil apparatus combined with in situ synchrotron X-ray ...