Rock mechanics constraints on mid-crustal low-viscosity flow beneath Tibet

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    It has been inferred from various types of geophysical data that the Tibetan middle and upper crust is detached from the underlying lower crust and mantle by a weak, mid-crustal zone involving partial melting at about 30-35 km depth. Previous modelling of the flow has used an arbitrary mid-crustal rheology to match the constraints imposed by the overall flow regime. Here we show that extrapolation of experimental rock mechanics data for solid-state flow of a quartz-dominated Tibetan middle and upper crust, plus flow of partially molten synthetic 'granitoid', are consistent with the geophysical constraints and provide an experimentally constrained basis for the modelling of crustal rheology involving partially molten rocks. © The Geological Society of London 2011.
    Original languageEnglish
    Pages (from-to)329-336
    Number of pages7
    JournalGeological Society Special Publication
    Issue number1
    Publication statusPublished - 2011


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