On the Origin of Small‐Scale Seismic Scatters at 660‐km Depth

Abstract

Seismic tomography models reveal broad long-wavelength structures associated with mantle convection. Both global and regional tomographic models resolve ubiquitous high velocity seismic anomalies in subduction zones, indicative of subduction of oceanic lithosphere into the deep mantle (e.g., Grand et al., 1997;. The seismic inversions show that diverse slab morphologies are imaged in the mantle transition zone (e.g.,