Proceedings of the 12th International INQUA meeting on paleoseismology, active tectonic and archaeoseismology

274 1 2 T H I N T E R N AT I O N A L I N Q U A M E E T I N G O N PA L E O S E I S M O L O G Y , A C T I V E T E C T O N I C S A N D A R C H A E O S E I S M O L O G Y ( PATA ) , O C T O B E R 6 T H - 1 1 T H , 2 0 2 4 , L O S A N D E S , C H I L E PATA Days 2024 K E Y W O R D S archeoseismology, geomorphology, paleoseismology, damaged constructions (1) Université Grenoble Alpes, IRD, ISTerre, Grenoble, France. Lallemand. (2) ARTEHIS, Bourgogne University, France. (3) Université Grenoble Alpes, IRD, ISTerre, Grenoble, France. (4) Institute for Radioprotection and Nuclear Safety, Fontenay aux Roses, France. (5) ARTEHIS, Bourgogne University, France. (6) Institute for Radioprotection and Nuclear Safety, Fontenay aux Roses, France. *Email: theo@univ-grenoble-alpes.fr / amelie.Quiquerez@u- bourgogne.fr / laurence.audin@ird.fr / stephane.baize@irsn.fr / marguerite.mathey@irsn.fr / remy.grebot@gmail.com Théo Lallemand (1) A. Quiquerez (1) L. Audin (1) S. Baize ( 4) R. Grebo (5) M. Mathey (6) COMBINING GEOLOGICAL AND ARCHAEOLOGICAL EVIDENCE TO INFER THE RECENT TECTONICS OF THE MONTAGNE DU VUACHE FAULT, JURA MOUNTAINS , FRANCE A B S T R A C T A multidisciplinary study combining archeoseismology, geomorphology and structural geology on a Gallo- Roman site in the Jura mountains (Jura, France), with a potentially evidence for recent tectonic deformation along the northern Montagne du Vuache Fault (MVF) a slow intracontinental fault. This site has the potential to record local seismic activity through the deformation of ancient buildings. In order to be able to study these deformations, a tectonic context has been established for the area through a multidisciplinary study combining structural geology, geomorphology and archaeoseismology. The preliminary results suggest the occurrence of tectonic events during Antiquity along the northern segments of the MVF. Surface-rupture faulting could have damaged and offset Gallo- roman remains, and strong local shaking during those events could have coevally damaged the constructions. The 20–30 cm wall offset observed could fit with the deformation characteristic of a shallow to very shallow moderate-magni- tude earthquake, capable of causing strong shaking in the vicinity of the fault.