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  Information - MPRG13 The extrapolation of lab data to nature (co-listed in GD, GMPV & TS)

Event Information
Experimental investigation of the behaviour of rock materials during deformation, heat treatment, interaction with fluids etc. represents an important means to learn more about the evolution of microstructures, the processes involved and the resulting physical properties of rocks (e.g., rheology, porosity, permeability). Although experimental work conveniently allows systematic variation of the applied conditions (e.g., temperature, pressure, stress, strain, strain rate), the timescale of the experiments commonly is orders of magnitude faster than in nature. In addition, dimensions of the samples used in the laboratory are usually small compared to the natural situations of interest.
One of the major challenges in rock studies, thus, is the application of experimentally obtained data to nature, requiring substantial extrapolations in time and/or dimension. Although different approaches and steps forward have been made, the extrapolation of lab data to nature is still a problem. We therefore invite contributions to this session that present examples from nature and/or laboratory (real rock and rock analogue experimentalists) to demonstrate where extrapolations in mono- or polymineralic systems work well, where and why problems occur and what kind of information is required to improve our extrapolation strategies. It is our intention to bring together experimentalists and field-oriented earth scientists, but we also invite numerical modelers dealing with lab-nature extrapolations to contribute to the session.

Preliminary List of Solicited Speakers
Brian Evans (MIT), title: Scales of microstructure during dislocation creep in minerals
Frederic Gueydan (University Rennes) title: 'Transient creep regime during strain localization: a field and numerical perspective'


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