Speaker: Terry Ann Suer

"Interpreting geochemical signals from the early Earth with metal-silicate partitioning experiments"

Abstract: Core segregation was a formative event in Earth’s history. The mantle’s geochemical record indicates that chemical equilibration with the core in a deep silicate magma ocean played a key role in core-mantle differentiation. Investigating metal-silicate partitioning at such conditions is therefore important for interpreting these geochemical signatures. I will present results from metal-silicate partitioning experiments carried out in laser-heated diamond anvil cells, for a suite of volatile and highly siderophile elements. Some of the challenges associated with chemical analyses of experimental charges that are few to several microns in size will be highlighted. I will also describe how these partitioning measurements can be applied to adding further constraints to the composition of the core, mantle, and the origin of Earth’s volatiles.

GSPD comprises scientific talks up to one hour in length by graduate students and post docs, but all are welcome to attend, including faculty and staff. Lunch will be provided. As always, please plan to bring reusable plates and cutlery to reduce waste.