Linking Microstructures and Reactions

A Metamorphic “Reaction”

Metamorphic “reactions”

Typical metamorphic microstructure

Disequilibrium textures common

Obvious reactions: Coronas and symplectites

Typical metamorphic microstructures

Prograde metamorphic reaction processes

Metamorphic reactions at the grain-boundary scale

Overall reactions at the local scale

Overstepping: energy and temperature

Energy barriers and reaction rates

Rates of reaction at interfaces

Rate of nucleation

Interplay between nucleation and growth

Interplay between nucleation and growth

Effect of heating rate

Time-temperature-transformation and grain size distributions