New insights on the runout of large landslides in the Valles-Marineris canyons, Mars

Cathy Quantin (1) , Pascal Allemand (1) , Christophe Delacourt (1) , E. Lajeunesse

1 LST - Laboratoire de Sciences de la Terre

Analogy with lab-scale dry granular flow experiments demonstrates that runouts and deposits heights of Valles- Marineris (VM) landslides can be scaled on a curve varying primarily with the initial aspect ratio of the mobilized rock mass (before slope failure). This results suggests both that any interstitial fluid played a negligible part in the VM landslides dynamics and that mobility is not an appropriate tool to characterize their dynamics. Citation: Lajeunesse, E., C. Quantin, P. Allemand, and C. Delacourt (2006), New insights on the runout of large landslides in the Valles-Marineris canyons, Mars.

Mots clés: Planetary Sciences: Solar System Objects: Mars; Hydrology: Debris flow and landslides; Hydrology: Erosion; Planetary Sciences: Solar System Objects: Mars.

Domaines: Géomorphologie; Planétologie

Cathy Quantin, Pascal Allemand, Christophe Delacourt, E. Lajeunesse. New insights on the runout of large landslides in the Valles-Marineris canyons, Mars. Geophysical Research Letters, 2006, 33, pp.L04403. ⟨10.1029/2005GL025168⟩. ⟨hal-00093116⟩