Please note that this session was withdrawn and is no longer available in the respective programme. This withdrawal might have been the result of a merge with another session.

GD1.3

GD1 EDI

It is well known that mantle convection can be explored explicitly in terms of the plate and plume mode. The former is associated with the cold upper thermal boundary layer, which is the lithosphere, and the latter with the hot lower thermal boundary layer, which sources plumes. Convective buoyancies associated with these modes are significant, capable of driving plate motions. However, they need to be contrasted with plate boundary forces. Oblique rifting and the influence of magma highlight some of the difficulties in understanding these forces. Continental rifts provide an ideal setting to study the interactions of the plume mode and evolving plate boundary forces as the rifting process advances. Numerous
observations of continental breakup since the Cretaceous are well documented in the geological archives. They include mapping continental dynamic topography, studying plate kinematic changes, using thermochronological models and petrological observables, and imaging deep structure by seismic tomography to constrain the breakup history. These observations allow one to track the expressions of past mantle flow and further understand the dynamics of continental breakup as the interplay of convective and plate boundary forces.

This session aims to provide a holistic view of the causes of continental breakup. We welcome contributions from seismic
tomography, anisotropy studies, geochemistry, plate kinematics, structural geology, and numerical models that address questions surrounding mantle-lithosphere interactions. Studies using a multidisciplinary approach are particularly encouraged.

Co-organized by
Convener: Berta VilacísECSECS | Co-conveners: Ingo StotzECSECS, Jorge Nicolas Hayek ValenciaECSECS, Sascha Brune, D. Sarah Stamps