Peter E. van Keken coauthored global models of water transport by subducting slabs. Thermal calculations are combined with mineral stability to estimate where bound water is released and how much remains in deeper material.[ref]
Subduction factory: 4. Depth-dependent flux of H2O from subducting slabs worldwide by Peter E. van Keken and others. Abstract and Methods: thermal models, mineral stability and water retention
Cold and hot subduction zones need not dehydrate at the same depths. The calculation connects metamorphic facies, flux melting and the deep water budget through composition-dependent reaction conditions.
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