Action 1.1: Faults dating
- Collaboration: to be determined
- Leader: EDF
- Fundings: Postdoc
- Status: still in defining outlines
Lowering the fault slip rates uncertainties in order to better constrain the return period of significant earthquakes: “How active a fault is ?”
It can be, in several cases, addressed through morphotectonic mapping, including the cartography of ground deformation , measurement of quaternary markers offsets and dating.
Pre- or Post- dating the last episodes of the local fault activities is often a critical issue and can involve various geo- or thermo-chronological techniques, dating the deposition, burial or exposure of rocks and soils, precipitation/re-cristallisation of minerals or the chronology of low-temperature thermal events.
The objective, within SIGMA2, will be to apply, bring together and eventually improve methodologies for fault dating in order to reduce uncertainties associated to characterisation of last motion on faults in stable continental region, where no ground deformation and/or quaternary markers are available.