Articles | Volume 9, issue 5
https://doi.org/10.5194/se-9-1141-2018
https://doi.org/10.5194/se-9-1141-2018
Research article
 | 
27 Sep 2018
Research article |  | 27 Sep 2018

Multiscale porosity changes along the pro- and retrograde deformation path: an example from Alpine slates

Ismay Vénice Akker, Josef Kaufmann, Guillaume Desbois, Jop Klaver, Janos L. Urai, Alfons Berger, and Marco Herwegh

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Short summary
We studied porosity changes of slates from eastern Switzerland, which were deposited in an ocean in front of the emerging Alps during the Cenozoic. The Alpine collision between the European and African plates brought the rocks from this basin to today’s position in the Alps. From the basin to the surface, the porosity first decreased down to a small number of round cavities (<1 vol%) to microfractures, and once at the surface, the porosity increased again due to the formation of macro-fractures.