Low-Velocity Zone of the Earth's Mantle: Incipient Melting Caused by Water

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Science  21 Aug 1970:
Vol. 169, Issue 3947, pp. 764-766
DOI: 10.1126/science.169.3947.764


Experimental phase diagrams for the systems gabbro-water and peridotite-water indicate that, if there is any water in the upper mantle, then traces of hydrous interstitial silicate magma will be produced at depths corresponding to the beginning of the low-velocity zone. This explanation for the zone is more satisfactory than others proposed.

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