CE49 - Planétologie, structure et histoire de la Terre

Do Rock fault Asperities Melt or Abrade during earthquakes? – DRAMA

Submission summary

Seismic faults are the places where earthquakes happen, by a sudden release of the stress accumulated in the surrounding rock, sometimes with dramatic consequences. The fault then starts sliding, and numerous thermo-mechanical phenomena occur within this interface.The DRAMA project aims to improve our understanding of these phenomena, by reproducing in the lab the conditions of seismic sliding of a fault rock asperity. The question is to determine under which conditions this asperity will melt (thus lubricating the fault and enhancing sliding) or abrade (thus releasing in the interface a granular fault gouge which will modify its frictional properties). Several instrumentational means will be used to describe and quantify the energetic budget at the scale of the asperity, and a novel and complex numerical model will be used to reproduce experiments and build a local asperity frictional law.

Project coordination

Guilhem MOLLON (LABORATOIRE DE MECANIQUE DES CONTACTS ET DES STRUCTURES)

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.

Partner

LaMCoS LABORATOIRE DE MECANIQUE DES CONTACTS ET DES STRUCTURES

Help of the ANR 285,797 euros
Beginning and duration of the scientific project: December 2021 - 36 Months

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