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  • Aprilis, GeorgiosUniv Bayreuth, Germany (author)

The Effect of Pulsed Laser Heating on the Stability of Ferropericlase at High Pressures

  • Article/chapterEnglish2020

Publisher, publication year, extent ...

  • 2020-06-16
  • MDPI,2020
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:liu-168292
  • https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-168292URI
  • https://doi.org/10.3390/min10060542DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Funding Agencies|Federal Ministry of Education and Research, Germany (BMBF)Federal Ministry of Education & Research (BMBF) [5K16WC1, 05K19WC1]; Deutsche Forschungsgemeinschaft (DFG)German Research Foundation (DFG) [DU 954-11/1, DU 393-9/2, DU 393-13/1]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University faculty grant SFO-Mat-LiU [2009 00971]
  • 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.

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Added entries (persons, corporate bodies, meetings, titles ...)

  • Pakhomova, AnnaDeutsch Elektronen Synchrotron DESY, Germany (author)
  • Chariton, StellaUniv Bayreuth, Germany (author)
  • Khandarkhaeva, SaianaUniv Bayreuth, Germany (author)
  • Melai, CaterinaUniv Bayreuth, Germany (author)
  • Bykova, ElenaDeutsch Elektronen Synchrotron DESY, Germany (author)
  • Bykov, MaximUniv Bayreuth, Germany (author)
  • Fedotenko, TimofeyUniv Bayreuth, Germany (author)
  • Koemets, EgorUniv Bayreuth, Germany (author)
  • McCammon, CatherineUniv Bayreuth, Germany (author)
  • Chumakov, Aleksandr IESRF European Synchrotron, France (author)
  • Hanfland, MichaelESRF European Synchrotron, France (author)
  • Doubrovinckaia, NataliaLinköpings universitet,Teoretisk Fysik,Tekniska fakulteten,Univ Bayreuth, Germany(Swepub:liu)natdo06 (author)
  • Dubrovinsky, LeonidUniv Bayreuth, Germany (author)
  • Univ Bayreuth, GermanyDeutsch Elektronen Synchrotron DESY, Germany (creator_code:org_t)

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  • In:Minerals: MDPI10:62075-163X

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