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.