Geophysics – Geodynamics

The emergence of three continental rift arms at a single point result in the formation of a Rift-Rift-Rift triple junction. Triple junctions are one of the most remarkable features of global platetectonics but their origins, evolution, and relationship to magmatism and the Earth’s mantlestructure remains debated. So far, most of our understanding regarding the initiation andstability of triple junctions is derived from plate kinematic studies. However, these kinematicmodels cannot address the dynamics of cause and effect concerning the joint evolution of faultnetworks, topography, surface processes, magmatism and plate motions. Joint interpretationof advanced numerical models and observational data have the potential to elucidate thenature of triple junctions in an unprecedented detail. Here we use a multi-disciplinary approachthat combines a state-of-the-art 3D lithospheric scale numerical model with geological andgeophysical data from unique field tectonic laboratories such as the currently active Afartriple junction in East Africa as well as the Cretaceous Equatorial Atlantic rift triple junction. The goal of this project is to characterize the role and interaction of key processes in shaping triple junctions from the mantle to the surface. Our results will provide a framework for understanding the complex spatial and temporal evolution of Rift-Rift-Rift triple junctions worldwide.

Prof. Dr. Marta Perez-Gussinye – MARUM University of Bremen, Germany

Prof. Dr. Sascha Brune – GFZ Potsdam, Germany

Prof. Derek Keir – University of Southampton, UK / University of Florence, Italy

Dr. Ameha Muluneh, 2024-2027

Postdoctoral Fellowship from German Association of Science (DFG).