Trench sediment heterogeneity controls accretion mechanisms in subduction zone.

ABSTRACT: Trench basins related to an almost entirely subducted oceanic lithosphere are filled by deposits sourced from either the passive continental margin or the accretionary wedge. They also include large-scale submarine landslides often triggered by the inherited rough topography of the subducting plate. This mechanism provides the deposition of material by mass-transport processes from the wedge to the trench, resulting in highly heterogeneous trench sedimentation. The role of the mass-transport deposits in the accretion mechanisms, as well as their influence on seismic behaviour at the plate interface is difficult to assess in the active trenches, because of their limited accessibility. This study reports on a well-preserved fossil trench-fill sequence exposed in the Northern Apennines. A mul

SUBMITTER: Sanita E 

PROVIDER: S-EPMC12501276 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature