Dry mantle transition zone inferred from the conductivity of wadsleyite and ringwoodite

Takashi Yoshino (), Geeth Manthilake, Takuya Matsuzaki and Tomoo Katsura
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Takashi Yoshino: Institute for Study of the Earth’s Interior, Okayama University, Misasa, Tottori 682-0193, Japan
Geeth Manthilake: Institute for Study of the Earth’s Interior, Okayama University, Misasa, Tottori 682-0193, Japan
Takuya Matsuzaki: Institute for Study of the Earth’s Interior, Okayama University, Misasa, Tottori 682-0193, Japan
Tomoo Katsura: Institute for Study of the Earth’s Interior, Okayama University, Misasa, Tottori 682-0193, Japan

Nature, 2008, vol. 451, issue 7176, 326-329

Abstract: A large amount of water could potentially reside in the Earth's mantle transition zone, as two minerals there, wadsleyite and ringwoodite, can store significant amounts of water in their crystal structure. This paper reports the electrical conductivity measurements of these minerals, and finds that they can explain observed conductivity-depth profiles without introducing a significant amount of water into the mantle transition zone.

Date: 2008
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DOI: 10.1038/nature06427

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