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Science 8 June 2007:
Vol. 316. no. 5830, pp. 1468 - 1471
DOI: 10.1126/science.1140855
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Reports

Seismic Evidence for Deep-Water Transportation in the Mantle

Hitoshi Kawakatsu* and Shingo Watada

We report seismic evidence for the transportation of water into the deep mantle in the subduction zone beneath northeastern Japan. Our data indicate that water is released from the hydrated oceanic crust at shallow depths (<~100 kilometers) and then forms a channel of hydrated mantle material on top of the subducting plate that is the pathway for water into the deep mantle. Our result provides direct evidence that shows how water is transported from the ocean to the deep mantle in a cold subduction zone environment.

Earthquake Research Institute, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan.

* To whom correspondence should be addressed. E-mail: hitosi{at}eri.u-tokyo.ac.jp

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