Dr. Helene Breton
Function and Responsibilities:
I am a postdoctoral researcher studying how heat is transferred at the core-mantle boundary (CMB), a critical interface in the Earth's interior. Thermal conduction is the primary cooling mechanism in the lower mantle, but radiative heat transfer—the movement of heat through electromagnetic radiation—might also play a significant role, particularly near the CMB, and is not yet well understood.
Therefore, I use a laser-heated diamond anvil cell to investigate in the laboratory the light absorption properties of bridgmanite, the most abundant mineral in the lower mantle. By studying how bridgmanite absorbs light under extreme conditions, I aim to determine its contribution to radiative heat transfer. This research helps refine our understanding of the Earth's thermal evolution, mantle dynamics, and long-term cooling processes.