PMMH’s weekly seminar is held every Friday at 11 am (map)
Stéphane Perrard
Etienne Reyssat
Virgile Thiévenaz

PMMH
BARRE CASSAN
BAT A 1ER ETAGE CASE 18
7 QUAI SAINT BERNARD
75005 PARIS
France
Tel : (33) 1 40 79 45 22
Séminaire PMMH Jean-Arthur Olive (ENS)
From micro-crack to crustal fault
Major fault systems dissect the Earth's crust at the boundaries of tectonic plates. On human time scales, faults may slip catastrophically during earthquakes, but fault lines remain steady features of tectonic landscapes. On geological time scales, new fault lines can form, shape mountains and basins as they accumulate offset, while others can heal and disappear. I will present a simple mechanical framework describing the initiation, growth and termination of major fault systems in terms of the visco-elastic-brittle rheology of the crust. I will then challenge key aspects of this framework, and discuss brittle faulting as a mechanism that spans multiple spatial scales, from mineral (10^-3 m) to crust (10^4 m), and should be described as such in continuum models of tectonic deformation.
The audience is composed of people with rather heterogeneous backgrounds including specialists in solids, fluids, granular flows, statistical physics... so the idea is to keep your talk understandable by people not necessarily working in your field... The seminar time slot runs from 11am to noon so the best is to make the talk last around 45 minutes to leave some time for discussion.
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