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In situ stress-strain measurements in a deformation-DIA apparatus at P-T conditions of the upper part of the mantle transition zone

Takaaki Kawazoe, Yu Nishihara, Tomohiro Ohuchi, Norimasa Nishiyama, Yuji Higo, Ken-ichi Funakoshi and Tetsuo Irifune
In situ stress-strain measurements in a deformation-DIA apparatus at P-T conditions of the upper part of the mantle transition zone
American Mineralogist (December 2011) 96 (11-12): 1665-1672

Abstract

We report on technical improvements in experiments with a deformation-DIA (D-DIA) apparatus, which enables study of the rheology of solid materials at P-T conditions of the Earth's mantle transition zone. Dimensions of the anvil truncation, pressure medium, and gasket were optimized to achieve deformation experiments above 13 GPa with a relatively low press load (<0.7 MN) to minimize the damage of the X-ray transparent second-stage anvils. The adoption of low X-ray absorbing material (e.g., cubic BN anvils, graphite window in a LaCrO (sub 3) heater) along the X-ray path enabled quantitative determination of stress and strain of a sample by means of simultaneous in situ X-ray radial diffraction and radiography using synchrotron radiation at SPring-8. Based on the new technique, a uniaxial deformation experiment with a strain rate of 3.88 X 10 (super -5) s (super -1) and strains up to 25.5% was carried out on wadsleyite at a pressure of 14.5 GPa and a temperature of 1700 K.


ISSN: 0003-004X
EISSN: 1945-3027
Coden: AMMIAY
Serial Title: American Mineralogist
Serial Volume: 96
Serial Issue: 11-12
Title: In situ stress-strain measurements in a deformation-DIA apparatus at P-T conditions of the upper part of the mantle transition zone
Affiliation: Ehime University, Geodynamics Research Center, Ehime, Japan
Pages: 1665-1672
Published: 201112
Text Language: English
Publisher: Mineralogical Society of America, Washington, DC, United States
References: 28
Accession Number: 2012-009936
Categories: Solid-earth geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Secondary Affiliation: Japan Synchrotron Research Institute, JPN, Japan
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201205
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