The dynamics of melt and shear localization in partially molten aggregates

Richard F. Katz (), Marc Spiegelman and Benjamin Holtzman
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Richard F. Katz: Lamont-Doherty Earth Observatory of Columbia University
Marc Spiegelman: Lamont-Doherty Earth Observatory of Columbia University
Benjamin Holtzman: Lamont-Doherty Earth Observatory of Columbia University

Nature, 2006, vol. 442, issue 7103, 676-679

Abstract: Magma goes up in the world The volcanoes that lie along tectonic boundaries on Earth are fed by melt generated in the mantle deep below, but how the melt gets from the mantle to the volcanoes remains unknown. Driven by recent experiments demonstrating stress-driven segregation in partially molten rocks, Katz et al. propose a new theory to explain the behaviour of this system. The theory predicts the spontaneous emergence of bands of concentrated melt and shear in deforming, partially molten aggregates. This suggests that rapid extraction of molten rock from the mantle beneath mid-ocean ridges may occur via a connected network of highly permeable, melt-rich bands, instead of by slower, uniformly distributed porous flow.

Date: 2006
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DOI: 10.1038/nature05039

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