Saswata Hier-Majumder

Assistant Professor



Magma nanotube.

Congratulations Dr. Drombosky
April, 2014
Tyler Drombosky successfully defended his thesis on April 4th, 2014. In his doctoral dissertation, Tyler developed a novel technique for modeling microstructure in deforming, partially molten rocks at the base of the Earth's tectonic plates. Tyler will move on to work at Luminal.

Links to old news from our group.

Subsurface ocean in Triton.

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Earth's core-mantle boundary is characterized by a number of thin, dense, partially molten, and low-viscosity layers. One of our current projects investigates the internal structure, bulk properties, and dynamics of these layers. We are also interested in understanding the origin of these layers (ULVZ in seismic parlance) and the nature of interaction between them, overlying mantle, and underlying outer core.
Recent works from our group include developing a model for the seismic velocities through the ULVZ and using the thickness of the ULVZ layers from studies of ScP phases to measure the viscosity of this layers. The results of these calculations indicate that the ULVZ is characterized by a relatively modest amount of melting and a viscosity nearly two orders of magnitude lower than the overlying mantle. The low viscosity, high density, and small amount of melting within the ULVZ have deep implications for circulation within large low shear velocity provinces and long term stability of mantle plumes.

This collaborative research is supported by the National Science Foundation.