Experimental Rheometry of Magmatic Multiphase Suspensions

本研究将考察多相硅酸盐岩浆固液悬浮液和气液乳状液的流变性与剪切速率、温度和分散相体积分数的关系。具体的实验包括粘度测量熔融钠长石中高达40%体积蒸汽的气泡乳剂，以及人工制造的透辉石晶体悬浮液与钙长石-透辉石二元熔体在高达40%体积固体的平衡中。关于多相岩浆体系流动特性的权威实验研究仍然很少，从所提出的实验中获得的结果将导致我们对这些材料复杂流变特性的理解取得可测量的进展。如果我们要了解岩浆系统的动力学及其构成的自然灾害，这是必不可少的。

9614376 Spera This research will examine the rheology of multiphase silicate magmatic solid-liquid suspensions and gas-liquid emulsions as a function of shear rate, temperature, and disperse-phase volume fraction. Specific experiments include viscometric measurements of emulsions of air bubbles in molten albite at up to 40 volume percent vapor and of artificially-created suspensions of diopside crystals in equilibrium with anorthite-diopside binary melts at up to 40 volume percent solids. Authoritative experimental studies of the flow properties of multiphase magmatic systems remain quite scarce, and results obtained from the proposed experiments will lead to measurable progress in our comprehension of the complex rheological nature of these materials. This is essential if we are to understand the dynamics of magmatic systems and the natural hazards they pose.