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Volume 22 Issue 2
Apr.  2011
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Melt Evolution above a Spontaneously Retreating Subducting Slab in a Three-Dimensional Model

  • Received Date: 2017-03-21
  • Dehydration of the subducting slab favors the melting of the surrounding mantle. Water content and melt evolution atop a spontaneously retreating subducting slab are reported in a three- dimensional (3-D) model. We find that fluids, including water and melts in the rocks, vary substantially along the trench, which cannot be found in two-dimensional (2-D) models. Their maxima along the subducting slab are mainly located at about 50 to 70 and 120 to 140 km. Volumetric melt production rate changes spatially and episodically atop the slab, which may reflect the intensity and variations of volcanoes.
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Melt Evolution above a Spontaneously Retreating Subducting Slab in a Three-Dimensional Model

  • 1. Department of Earth Sciences, Swiss Federal Institute of Technology (ETH Zurich), CH-8092 Zurich, Swit-zerland
  • 2. Department of Earth Sciences, Swiss Federal Institute of Technology (ETH Zurich), CH-8092 Zurich, Switzerland
  • 3. Adjunct Professor of Geology Department, Moscow State University, 119899 Moscow, Russia
  • 4. Department of Geology and Geophysics and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, MN 55415, USA

Abstract: Dehydration of the subducting slab favors the melting of the surrounding mantle. Water content and melt evolution atop a spontaneously retreating subducting slab are reported in a three- dimensional (3-D) model. We find that fluids, including water and melts in the rocks, vary substantially along the trench, which cannot be found in two-dimensional (2-D) models. Their maxima along the subducting slab are mainly located at about 50 to 70 and 120 to 140 km. Volumetric melt production rate changes spatially and episodically atop the slab, which may reflect the intensity and variations of volcanoes.

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