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Fluid-solid interactions: from mechanism to rate - from grain scale to plate
Convener: Timm John  | Co-Conveners: Oliver Plümper , Johannes C. Vrijmoed 
 / Tue, 25 Apr, 13:30–15:00  / Room L7
 / Attendance Tue, 25 Apr, 17:30–19:00  / Hall X2
Reactions between fluids and rocks have a fundamental impact on the geodynamics and geochemistry of Earth at all scales. Fluid-rock interactions strongly affect the petrophysical properties and chemical composition of the rocks. Therefore, they play an important role in processes such as plate tectonics and the formation of economic deposits. The fact that fluid has migrated through rocks is evident from field observations such as veins, metasomatic alteration zones, and (de)-hydration reaction fronts occurring on outcrop to regional scales and porosity observed on the micron down to nanometre scale. Metasomatic alteration zones, but also ore deposits point to the chemical effect of fluid flow that facilitated element mobilisation. Mechanical effects of fluid flow are expressed in phenomena such as zones of localised deformation and hydration.

Despite the current field, experimental, and theoretical arguments for the importance of fluid-rock interaction for geodynamic and geochemical processes, the underlying mechanisms and rates of the processes are still poorly understood. On the one hand this is due to the fact that rocks provide only a snapshot in time, and on the other hand because deformation, reaction, and fluid flow are complex coupled processes which provide a challenge for numerical modelling as well as for interpreting and controlling experiments. Numerical modelling, experiments, and comprehensive field and laboratory studies that focus on the mechanisms, the rates, the interplay between fluid flow, reaction, deformation and mass transport processes, or the connection between small to large scales, will help improving our understanding.

We invite contributions that shed light on the coupled processes of fluid flow, reaction, deformation and fluid mediated mass transport at all scales, through any of these approaches. We also welcome geochronology and geospeedometry studies related to fluid flow processes, as well as regional and outcrop scale field studies of fluid-rock interaction. Petrology research using state-of-the art analytical equipment with resolutions down to the nanometer scale that focus on the mechanisms documented in rocks that interacted with fluid contributes to the many facets of fluid-rock interaction. Numerical modelling studies that are designed to handle the complexity and coupled nature of fluid-rock interaction are also encouraged. Finally, studies based on laboratory experiments in which mechanisms and rates of fluid-rock interaction can be further constrained will complete the diversity of this session.