Electrical conductivity of mantle peridotite at the uppermost lower mantle condition

Takashi Yoshino, T. Katsura, Daisuke Yamazaki, E. Ito

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Electrical conductivity of mantle peridotite was measured at 25 GPa and temperature up to 1800 K in a Kawai-type multi-anvil apparatus. The starting material was gel with a composition of fertile spinel lherzolite (KLB1). After the conductivity measurement, mineral phases of run products are composed of magnesium silicate perovskite, ferro-periclase and Ca perovskite. The conductivity value of the peridotite is distinctly higher than those of post-spinel and magnesian silicate perovskite with a composition of (Mg 0.9,Fe0.1)SiO3, but lower than that of ferro-periclase. Both absolute values and change in activation enthalpy for the conductivity of the mantle peridotite are similar to those for the silicate perovskite. A presence of aluminous perovskite with substantial amount of ferric iron in crystal structure would enhance bulk conductivity of the lower mantle.

Original languageEnglish
Article number012102
JournalJournal of Physics: Conference Series
Volume215
DOIs
Publication statusPublished - 2010

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peridotite
Earth mantle
periclase
silicates
conductivity
electrical resistivity
spinel
anvils
magnesium
enthalpy
minerals
gels
activation
iron
crystal structure
products
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Electrical conductivity of mantle peridotite at the uppermost lower mantle condition. / Yoshino, Takashi; Katsura, T.; Yamazaki, Daisuke; Ito, E.

In: Journal of Physics: Conference Series, Vol. 215, 012102, 2010.

Research output: Contribution to journalArticle

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