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The Effect of Pulse...
The Effect of Pulsed Laser Heating on the Stability of Ferropericlase at High Pressures
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- Aprilis, Georgios (författare)
- Univ Bayreuth, Germany
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- Pakhomova, Anna (författare)
- Deutsch Elektronen Synchrotron DESY, Germany
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- Chariton, Stella (författare)
- Univ Bayreuth, Germany
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- Khandarkhaeva, Saiana (författare)
- Univ Bayreuth, Germany
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- Melai, Caterina (författare)
- Univ Bayreuth, Germany
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- Bykova, Elena (författare)
- Deutsch Elektronen Synchrotron DESY, Germany
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- Bykov, Maxim (författare)
- Univ Bayreuth, Germany
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- Fedotenko, Timofey (författare)
- Univ Bayreuth, Germany
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- Koemets, Egor (författare)
- Univ Bayreuth, Germany
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- McCammon, Catherine (författare)
- Univ Bayreuth, Germany
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- Chumakov, Aleksandr I (författare)
- ESRF European Synchrotron, France
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- Hanfland, Michael (författare)
- ESRF European Synchrotron, France
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- Doubrovinckaia, Natalia (författare)
- Linköpings universitet,Teoretisk Fysik,Tekniska fakulteten,Univ Bayreuth, Germany
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- Dubrovinsky, Leonid (författare)
- Univ Bayreuth, Germany
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(creator_code:org_t)
- 2020-06-16
- 2020
- Engelska.
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Ingår i: Minerals. - : MDPI. - 2075-163X. ; 10:6
- Relaterad länk:
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https://liu.diva-por... (primary) (Raw object)
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https://www.mdpi.com...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- It is widely accepted that the lower mantle consists of mainly three major minerals-ferropericlase, bridgmanite and calcium silicate perovskite. Ferropericlase ((Mg,Fe)O) is the second most abundant of the three, comprising approximately 16-20 wt% of the lower mantle. The stability of ferropericlase at conditions of the lowermost mantle has been highly investigated, with controversial results. Amongst other reasons, the experimental conditions during laser heating (such as duration and achieved temperature) have been suggested as a possible explanation for the discrepancy. In this study, we investigate the effect of pulsed laser heating on the stability of ferropericlase, with a geochemically relevant composition of Mg0.76Fe0.24O (Fp24) at pressure conditions corresponding to the upper part of the lower mantle and at a wide temperature range. We report on the decomposition of Fp24 with the formation of a high-pressure (Mg,Fe)(3)O(4)phase with CaTi2O4-type structure, as well as the dissociation of Fp24 into Fe-rich and Mg-rich phases induced by pulsed laser heating. Our results provide further arguments that the chemical composition of the lower mantle is more complex than initially thought, and that the compositional inhomogeneity is not only a characteristic of the lowermost part, but includes depths as shallow as below the transition zone.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Nyckelord
- ferropericlase; laser-heated diamond anvil cell (LHDAC); lower mantle; diamond anvil cell; pulsed laser heating
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Aprilis, Georgio ...
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Pakhomova, Anna
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Chariton, Stella
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Khandarkhaeva, S ...
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Melai, Caterina
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Bykova, Elena
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visa fler...
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Bykov, Maxim
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Fedotenko, Timof ...
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Koemets, Egor
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McCammon, Cather ...
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Chumakov, Aleksa ...
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Hanfland, Michae ...
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Doubrovinckaia, ...
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Dubrovinsky, Leo ...
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