Dr. Freya R. George

Metamorphic petrologist–geochemist

About me

I am a metamorphic petrologist–geochemist interested in unravelling fundamental rock-forming processes that occur at tectonic plate margins and which control the evolution of our planet. Now-exhumed rocks and minerals recrystallized at high pressures and temperatures in these settings (e.g., subduction zones and collisional orogenic belts) contain integrated records of the processes that formed them in their geochemical signatures, microstructures, and thermobarometric histories. 

Using a multi-disciplinary suite of analytical, petrographic and modelling approaches, I interrogate this record to address a number of topics relating specifically to:

  • fundamental processes that occur during metamorphic crystallization (e.g., mineral nucleation, growth, chemical transport, and fluid flow), and factors that control the rate at which they occur;
  • the extent of and controls on chemical equilibrium and disequilibrium in rocks;
  • orogenic and crustal evolution, and the pressure–temperature–time paths that rocks and melts take through the crust;
  • metamorphic microstructure (i.e., the size, shape and spatial distribution of minerals) development and evolution. 
My research is grounded in careful observation of the rock record—beginning in the field and persisting until under an electron beam or laser—and I am always interested in applying new approaches. 

Please get in touch if you've got any questions about my research or outreach, would like to enquire about collaboration, or just want to look at some rocks!

Currently I am the Johns Hopkins University's Blaustein Postdoctoral Fellow in the Department of Earth and Planetary Sciences. 

Franciscan eclogite–blueschist, Summer 2021
Franciscan eclogite–blueschist, Summer 2021

Recent News

New open access paper in Journal of Metamorphic Geology on the high-temperature evolution of basal island arc crust in Pakistan! i.e., more beautiful diffusion-limited microstructures. 

Thanks to all co-authors at Oxford, Shell Brunei and the University of Calgary!

Is the influence of interface properties on crystal growth larger than previously assumed? Does it change the way we interpret metamorphic microstructures? 

New paper in Geology (doi:10.1130/G48715.1)! 

Exposures of ancient seafloor in Baltimore City? Wow!