Colloquium Speaker Wendy Panero today, Tuesday, September 11, 2012 at 4:00 PM

[Tate, Arnay]

Please take note of Colloquium taking place today, Tuesday, September 11, 2012 at 4:00 PM in The Robert Smith Seminar Room.  There will be a reception in the Atrium at 3:45 PM.  Details concerning the talk are as follows:



Speaker:               Wendy Panero - OSU, School of Earth Sciences

Date:                     Tuesday, September 11, 2012

Time:                    4:00 PM

Place:                    The Robert Smith Seminar Room

Title:                     "Earth Under Pressure: Probing the Deepest Reaches of the Planet"

Abstract:               The Earth's inner core is the youngest major feature of the Earth, slowly growing from the inside out at temperatures and pressures of ~6000K and 3.6 Mbar.  The dynamics of this region are a consequence of its composition, mineralogy, and viscosity, while influencing the Earth's magnetic field and moment of inertia.   Recent seismic results show significant heterogeneous features, suggesting that it is undergoing a dynamic process of unknown origin.
This talk presents new methods for measuring transport properties under the high-pressure, high-temperature conditions of the Earth's core, combining synchrotron-based X-ray experiments at high pressure and temperature with post-run focused-ion beam milling and transmission electron microscopy.  Together with models for texture evolution in metals, the mechanism by which the inner core develops and maintains anisotropy appears to be a combination of preferential growth in equatorial regions combined with solid-state deformation in response to mass variations in the Earth's mantle.

The website for the Colloquium is https://physics.osu.edu/physics-colloquium-schedule

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