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Stability of Fe,Al-bearing bridgmanite in the lower mantle and synthesis of pure Fe-bridgmanite

Title data

Ismailova, Leyla ; Bykova, Elena ; Bykov, Maxim ; Cerantola, Valerio ; McCammon, Catherine ; Boffa Ballaran, Tiziana ; Bobrov, Andrei ; Sinmyo, Ryosuke ; Dubrovinskaia, Natalia ; Glazyrin, Konstantin ; Liermann, Hanns-Peter ; Kupenko, Ilya ; Hanfland, Michael ; Prescher, Clemens ; Prakapenka, Vitali B. ; Svitlyk, Volodymyr ; Dubrovinsky, Leonid:
Stability of Fe,Al-bearing bridgmanite in the lower mantle and synthesis of pure Fe-bridgmanite.
In: Science Advances. Vol. 2 (15 July 2016) Issue 7 . - e1600427.
ISSN 2375-2548
DOI: https://doi.org/10.1126/sciadv.1600427

Official URL: Volltext

Abstract in another language

The physical and chemical properties of Earth’s mantle, as well as its dynamics and evolution, heavily depend on the phase composition of the region. On the basis of experiments in laser-heated diamond anvil cells, we demonstrate that Fe,Al-bearing bridgmanite (magnesium silicate perovskite) is stable to pressures over 120 GPa and temperatures above 3000 K. Ferric iron stabilizes Fe-rich bridgmanite such that we were able to synthesize pure iron bridgmanite at pressures between ~45 and 110 GPa. The compressibility of ferric iron–bearing bridgmanite is significantly different from any known bridgmanite, which has direct implications for the interpretation of seismic tomography data.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Research Institutions > Research Centres > Bavarian Research Institute of Experimental Geochemistry and Geophysics - BGI
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 550 Earth sciences, geology
Date Deposited: 28 Apr 2017 08:57
Last Modified: 27 Jul 2017 07:38
URI: https://eref.uni-bayreuth.de/id/eprint/36882