"Driving factors of slab geometry between depths of 400-1000 km" by Joshua Weber
Through seismic imaging, varying geometries of slab subduction are noted throughout the mantle. While some slabs remain mostly unaffected when penetrating down to the lower mantle (e.g. Mariana plate/trench), others appear to flatten out and lie along the 660 km discontinuity (e.g. Izanagi plate). Penetrating slabs with moderate dip angles (e.g. South American plate/Peru-Chile trench) are also observed. The exact cause of these varying geometries is largely unknown. This study attempts to identify if a variation in slab geometry at the upper lower mantle transition zone is caused by an interna...
Source: uow.edu.au