Dr. Pranabendu Moitra, Postdoctoral Research Associate Lunar and Planetary Laboratory
When
Where
Abstract: The violently explosive eruptions of basaltic magma are highly destructive but poorly understood. Basalt is the most ubiquitous magma on Earth and Mars, erupting typically as effusive to mildly explosive in styles. The viscosity of basaltic magma is too low to reach conditions for brittle fragmentation and explosivity. Therefore, the discovery of highly explosive basaltic eruptions on Earth and Mars has sparked interests about their cause. Using a combination of observational constraints from recent pyroclastic deposits, experiments andnumerical modeling I find that basalt, either in the presence of dissolved volatiles and abundant crystals or due to direct interaction with external volatiles such as groundwater, can fragment and erupt violently. I discuss the dynamics of these highly explosive eruptions, which have implications for mitigating volcanic hazards and the evolution of planetary interiors.
Refreshments served at 3:30 p.m. in Kuiper atrium
Live stream: http://bit.ly/PranabenduMoitraLPLColloquium