Simulation of Subduction Zone Seismicity by Dehydration of Serpentine

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Science  15 Nov 2002:
Vol. 298, Issue 5597, pp. 1407-1410
DOI: 10.1126/science.1075390

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We measured acoustic emission energy during antigorite dehydration in a multianvil press from 1.5 to 8.5 gigapascals and 300° to 900°C. There was a strong acoustic emission signal on dehydration, and analysis of recovered samples revealed brittle deformation features associated with high pore-fluid pressures. These results demonstrate that intermediate depth (50 to 200 kilometers) seismicity can be generated by dehydration reactions in the subducting slab.

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