Mantle Evolution
Mantle melting and thermal evolution of Earth
Understanding how Earth's mantle cooled over geological time is central to our knowledge of plate tectonics and habitability. Mantle peridotites preserve records of past melt extraction through olivine forsterite content, Re-Os depletion ages, and whole-rock major-element systematics.
By compiling a global xenolith dataset and applying thermodynamic modeling, I reconstruct secular changes in mantle potential temperature. My results reveal a stepwise cooling history with a transition marking the onset of modern-style subduction.