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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First-principles energetics and structural relaxation of antigorite.

G. C. Capitani, L. Stixrude, and M. Mellini (2009)
American Mineralogist 94, 1271-1278
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Imaging the subducted slab under the Calabrian Arc, Italy, from receiver function analysis.

N. P. Agostinetti, M. S. Steckler, and F. P. Lucente (2009)
Lithosphere 1, 131-138
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Seismic Evidence for Sharp Lithosphere-Asthenosphere Boundaries of Oceanic Plates.

H. Kawakatsu, P. Kumar, Y. Takei, M. Shinohara, T. Kanazawa, E. Araki, and K. Suyehiro (2009)
Science 324, 499-502
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Seismic imaging of subduction zone metamorphism.

S. Rondenay, G. A. Abers, and P. E. van Keken (2008)
Geology 36, 275-278
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High-Pressure Creep of Serpentine, Interseismic Deformation, and Initiation of Subduction.

N. Hilairet, B. Reynard, Y. Wang, I. Daniel, S. Merkel, N. Nishiyama, and S. Petitgirard (2007)
Science 318, 1910-1913
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