Heitt Mjolnir a heated rock deformation apparatus for the 4D visualisation of the sample evolution.
What is it about?
Direct imaging of processes happening in extreme conditions is extremely difficult in nature, but also in experiments where samples are often confined in heavy and robust metal vessels. In this paper, we publish the design of a new rig that is able to generate triaxial stress and temperature conditions similar to the ones happening in the upper earth crust while enabling time-resolved (4D) microtomography.
Why is it important?
This paper is important because this new rig pushes the boundaries of our experimental capacities, overcoming an important temperature threshold (>150-200C, where elastomers can't be used for sealing fluids) with little incidence on the safety requirements (no compressed gas is used) nor control capacity. The capacities of this rig, with large sample volume, are particularly interesting to reproduce subsurface conditions. It offers a platform to simulate subsurface storage, geothermal energy or carbonation processes, key areas for the green energy transition.