Sector collapse at Kick 'em Jenny submarine volcano (Lesser Antilles) : numerical simulation and landslide behaviour Dondin, F. Lebrun, J. F. /Kelfoun, Karim Fournier, N. Randrianasolo, A. Kick 'em Jenny Sector collapse Submarine landslide Numerical modelling Rheology VolcFlow Lesser Antilles Kick 'em Jenny volcano is the only known active submarine volcano in the Lesser Antilles. It lies within a horseshoe-shaped structure open to the west northwest, toward the deep Grenada Basin. A detailed bathymetric survey of the basin slope at Kick 'em Jenny and resulting high-resolution digital elevation model allowed the identification of a major submarine landslide deposit. This deposit is thought to result from a single sector collapse event at Kick 'em Jenny and to be linked to the formation of the horseshoe-shaped structure. We estimated the volume and the leading-edge runout of the landslide to be ca. 4.4 km(3) and 14 km, respectively. We modelled a sector collapse event of a proto Kick 'em Jenny volcano using VolcFlow, a finite difference code based on depth-integrated mass and momentum equations. Our models show that the landslide can be simulated by either a Coulomb-type rheology with low basal friction angles (5.5A degrees-6.5A degrees) and a significant internal friction angle (above 17.5A degrees) or, with better results, by a Bingham rheology with low Bingham kinematic viscosity (0 < nu (B) < 30 m(2)/s) and high shear strength (130 < I-3 a parts per thousand currency signaEuro parts per thousand 180 m(2)/s(2)). The models and the short runout distance suggest that the landslide travelled as a stiff cohesive flow affected by minimal granular disaggregation and slumping on a non-lubricated surface. The main submarine landslide deposit can therefore be considered as a submarine mass slide deposit that behaved like a slump. 2012 text https://www.documentation.ird.fr/hor/fdi:010055709 fdi:010055709 Dondin F., Lebrun J. F., Kelfoun Karim, Fournier N., Randrianasolo A.. Sector collapse at Kick 'em Jenny submarine volcano (Lesser Antilles) : numerical simulation and landslide behaviour. 2012, 74 (2), 595-607 EN