Submarine landslide morphometrics and slope failure dynamics along a mixed carbonate-siliciclastic margin, north-eastern Australia

Comparatively little work has been carried out on the morphology and distribution of submarine landslides mixed carbonate-siliciclastic margins. The morphometric analysis 84 open slope Great Barrier Reef (GBR) margin north-eastern Australia provides useful insights into failure dynamics frequency Our revealed that area affected by failures (12.6% margin) is similar to siliciclastic-dominated passive margins, although total volume remobilized sediment (73 km3) comparatively small. Landslide scars lie at shallower depths south (mean 576 m vs 1517 north) there good correlation between depth origin termination for GBR landslides. cumulative volume, length does not fit common distributions (e.g., power law, logarithmic or exponential) entire dataset. Still, landslide dimensions can be statistically explained either a law other lognormal some siliciclastic Morphometric characteristics, such as released per unit width probability function suggest mainly involved relatively unconsolidated sediments. We find disintegration debris flows was dominant process along their spreading efficiency mobility low. Margin stratigraphy, fluid overpressure base slope, detachment surfaces boundary different lithologies separate sedimentary cycles may have preconditioned fail. This compilation robust framework allows comparison with existing future databases, lays foundation performing numerical simulations assess landslide-generated tsunamigenic hazards margin.