Title: From micro to macro: microstructure, rheology, and the timescales of heat generation on icy satellites

Abstract: The material properties of ice and relevant mixtures directly control the dynamics of glacier flow and tectonics on icy satellite. The presence of impurities controls the solid state and partial melt microstructures and, in turn, influences the elastic, anelastic, viscous, and frictional responses of ice. I will discuss how frictional stability is influenced by a small quantity of ammonia, which has a deep eutectic with ice and is posited to be found on various icy moons. By using rate- and state- dependent friction laws, laboratory data can be used to model rupture propagation and fault mechanics on icy worlds, which will be critical to planning of future missions and interpretation of observational returns.