Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences
2011 Joint Annual Meeting of Japan Association of Mineralogical Sciences and The Geological Society of Japan
Session ID : R3-07
Conference information
R3: High-pressure science and deep Earth's material
Si-Al interdiffusion in garnet and density evolution of subducting slab
*Masayuki Nishi, Tomoaki Kubo, Hiroaki Ohfuji, Takumi Kato, Yu Nishihara, Tetsuo Irifune
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Keywords: majoritic garnet, subducting slabl, diffusion, transformation kinetics
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Abstract
Presence of untransformed metastable minerals may contribute to slab stagnation because it produces a buoyancy force. Here we report experimental results on the Si-Al interdiffusion rate in majoritic garnet, which controls the kinetics of the pyroxene-garnet transformation. The result indicates that large low-density metastable regions exist in the slab.
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© 2011 Japan Association of Mineralogical Sciences
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Abstracts for Annual Meeting of the Mineralogical Society of Japan

Abstracts of Papers Presented at the Annual Meeting of The Japanese Association of Mineralogists, Petrologists and Economic Geologists

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