Skip to Main Content
Skip Nav Destination

Electrical conductivity of aragonite in the subducted slab

Shigeaki Ono and Kenji Mibe
Electrical conductivity of aragonite in the subducted slab
European Journal of Mineralogy (January 2013) 25 (1): 11-15


The electrical conductivity of polycrystalline aragonite (CaCO (sub 3) ) was investigated using a multianvil press in the pressure range 3-6 GPa. The electrical conductivity of the samples was measured using a complex impedance analyzer in the frequency range 0.05-10 (super -6) Hz. A decrease in the electrical conductivity with increasing pressure was observed. The calculated activation enthalpy in the temperature range 800-1000 K increased with increasing pressure. The effect of pressure and temperature were included in the Arrhenius equation, and the fitted data gave an activation energy and volume of 0.40 eV (38.6 kJ/mol) and 9.28 cm (super 3) /mole, respectively. The positive activation volume observed in this study suggests that ionic conduction is the dominant mechanism for the electrical conductivity over the pressure and temperature range investigated. The electrical conductivity of aragonite is much higher than that of olivine, which is a major mineral in the upper mantle. Therefore, the subducted slab, which contains a significant amount of calcium carbonate, has a higher electrical conductivity compared with the surrounding mantle.

ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 25
Serial Issue: 1
Title: Electrical conductivity of aragonite in the subducted slab
Affiliation: Japan Agency for Marine-Earth Science and Technology, Institute for Research on Earth Evolution, Yokosuka-shi, Japan
Pages: 11-15
Published: 201301
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Germany
References: 37
Accession Number: 2013-034978
Categories: Geophysics of minerals and rocks
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
Secondary Affiliation: University of Tokyo, JPN, Japan
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Schweizerbart'sche Verlagsbuchhandlung. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201322
Close Modal

or Create an Account

Close Modal
Close Modal