Density of carbonated peridotite magma at high pressure using an X-ray absorption method

Sakamaki, Tatsuya*; Otani, Eiji*; Urakawa, Satoru*; Terasaki, Hidenori*; Katayama, Yoshinori

The density of carbonated peridotite magma was measured up to 3.8 GPa and 2100 K using an X-ray absorption method. The bulk modulus of carbonated peridotite magma is larger than that of hydrous peridotite magma. The partial molar volume of CO $_{2}$ in magma under high pressure and temperature conditions was calculated. Our results show that the partial molar volume of CO $_{2}$ is less compressible than that of H $_{2}$ O, suggesting that, on an equal molar basis, CO $_{2}$ is more effective than H $_{2}$ O in reducing peridotite melt density at high pressure.

Language	:	English
Journal	:	American Mineralogist
Volume	:	96
Number	:	4
Pages	:	p.553 - 557
Publication Year/Month	:	2011/04
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Paper URL	:	https://doi.org/10.2138/am.2011.3577
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Keywords	:	no keyword
Research Facility	:	SPring-8(大型放射光施設)
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Registration No. : AA20110449
JAEA Abstracts No. :
Paper Submission No. : 11300

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