Thesis / Dissertation

The influence of a sub-lithospheric decoupling layer on subduction zone surface motion, mantle circulation and slab dynamics

Roberta Carluccio, Rebecca Farrington (ed.)

Published : 2020

Abstract

The lithosphere consists of a strong surface layer fragmented in a series of major and minor tectonic plates moving over a weaker and more buoyant layer of asthenospheric material. The boundary between the lithosphere and asthenosphere, the LAB, is a critical element of plate tectonics as it mechanically decouples the motion of strong tectonic plates from the ow in the underlying weaker mantle. Recent geophysical observations report an abrupt seismic velocity decrease and electrical conductivity increase beneath certain segments of the subducting Pacific plate, which may represent the channelised base of the subducting oceanic lithosphere. This inferred sub-lithospheric weakness is predicted..

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University of Melbourne Researchers