FlowTrans 2015 Conference in Strasbourg

The International Conference on Flow in Transforming Porous Media will be held in Strasbourg, France, and will be open to researchers presenting their results about coupled fluid and solid flow in natural rocks, soils, granular media and porous media. The changes happening can be due to fast processes, with force exchange between fluid and solids, or slow processes, as during chemical reactions with dissolution and precipitation, during seismic cycles in faults or during diagenesis, or thermal processes, as in volcanic phenomena. The conference welcomes contributions from experimental, numerical and theoretical approaches.

For details on the various exciting sessions and for submitting your abstract contributions, go to: http://flowtrans2015.sciencesconf.org/

Secondment with CSIRO in Australia

From 02.06.15 – 05.07.15, Early Stage Researcher Ulrich Kelka visited the University of New South Wales in Sydney, Australia.

There he did a secondment with Thomas Poulet, Manolis Veveakis, and Klaus Regenauer-Lieb at the School of Petroleum and Engineering, all employees of the Flowtrans partner CSIRO.

They worked on a derivation of a 1D steady-state solution for the cnoidal waves/compaction bands applied to the zebra textures. This approach also accounts for the mechanical processes which are involved in the genesis of this pattern. The expression is an extension of the classical compaction bands theory (McKenzie, 1984) to non-linear rheology. This was a missing part in Ulrich’s work until the visit.

They got a closed form solution, and now the question is whether it is possible to apply the equation to the geological conditions that are assumed during the formation of the zebra bands at the San Vicente mine, Central Peru.

Ulrich is satisified with the results of his secondment with CSIRO; “We had pretty interesting discussions because everybody come from different fields (Geology, Mathematics, Engineering and Geophysics), and we ended up with four pages of equations leading to a pretty complicated expression, which might explain the zebra pattern formation”, he said.

FlowTrans Newsletter June 2014

To have some good reading over the summer, the FlowTrans fellows prepared the 2nd FlowTrans Newsletter, where you will mostly read about the work on mineral replacements carried out in the Munster group, and get a few glimpses over our recent Workshop on a volcano in La Palma. See for example how marble turns into apatite and creates patterns of new porosity, as illustrated in this figure.

Check it out here: FlowTrans Newsletter June 2014

Fingering on dike walls

During one of our field trips in Israel we were shown these interesting fingering like structures in sandstones. They occur at the interface to magmatic dikes. The idea is that the direction of the fingering (from left to right) give the direction of dike intrusion.

Read more