22 February 2019 from 14:30 to 15:15

PhD Defence: The lost plates of the Panthalassa Ocean

Compared to continental lithosphere, oceanic lithosphere has a limited lifespan at the Earth’s surface. As a result of its continuous subduction and formation at mid-ocean ridges, modern oceanic crust is almost nowhere older than ~200 Ma. This implies that the lithosphere that was underlying ancestral oceans, such as the Panthalassa Ocean surrounding Pangea during its culmination in late Paleozoic – early Mesozoic times, has (almost) all been lost to subduction. As a result, deep-time plate tectonic reconstructions rely primarily on geological, paleontological and paleomagnetic data from the continents. Such reconstructions portray the distribution of plates that host continents through geological time, but generally lack (or include only conceptual) plate motions and -geometry in the oceanic domains. In this thesis, approaches  are developed and data is collected that improve deep-time global plate kinematic reconstructions of the Panthalassa Ocean through quantitative restoration of lost oceanic plates.

Start date and time
22 February 2019 14:30
End date and time
22 February 2019 15:15
PhD candidate
Lydian Boschman
Dissertation
Reconstructing lost plates of the Panthalassa Ocean
PhD supervisor(s)
Prof. dr. Douwe van HinsbergenProf. dr. Wim Spakman