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

Journal Article · · Science Advances
 [1];  [2];  [2];  [3];  [2];  [2];  [4];  [2];  [5];  [6];  [6];  [7];  [8];  [9];  [9];  [8];  [2]
  1. Univ. of Bayreuth (Germany). Bayerisches Geoinstitut, and Lab. of Crystallography
  2. Univ. of Bayreuth (Germany). Bayerisches Geoinstitut
  3. Univ. of Bayreuth (Germany). Bayerisches Geoinstitut; European Synchrotron Radiation Facility (ESRF), Grenoble (France)
  4. Moscow State Univ., Moscow (Russian Federation). Dept. of Petrology, Geological Faculty
  5. Univ. of Bayreuth (Germany). Lab. of Crystallography
  6. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Photon Science
  7. Univ. of Bayreuth (Germany). Bayerisches Geoinstitut; European Synchrotron Radiation Facility (ESRF), Grenoble (France); Univ. of Munster, Munster (Germany). Institut für Mineralogie
  8. Univ. of Munster, Munster (Germany). Institut für Mineralogie
  9. Univ. of Chicago, IL (United States). Center for Advanced Radiation Sources

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. Here, 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.

Research Organization:
Univ. of Chicago, IL (United States)
Sponsoring Organization:
USDOE; Federal Ministry of Education and Research (BMBF) Germany; German Research Foundation (DFG)
Grant/Contract Number:
FG02-94ER14466; AC02-06CH11357
OSTI ID:
1466581
Journal Information:
Science Advances, Vol. 2, Issue 7; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 24 works
Citation information provided by
Web of Science

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Cited By (3)

Valence and spin states of iron are invisible in Earth’s lower mantle journal March 2018
Implementation and application of the peak scaling method for temperature measurement in the laser heated diamond anvil cell journal August 2018
High-pressure single-crystal X-ray diffraction and synchrotron Mössbauer study of monoclinic ferrosilite journal February 2019

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