How can exsolution textures in high pressure metamorphic rocks be used to determine their cooling history?

Question

The question is given in relation to pyroxenes. I know that in igneous bodies under:

fast cooling you will only get displacive tranisitions and no exsolution or reconstructive ones giving you homogenous pigonite and augite crystals

intermediate cooling you will get some diffusion and no reconstructive transitions leading to augite host crystals with pigeonite lamallae and pigeonite host crystals with augite lamallae.

slow cooling you get displacive, reconstructive and exsolution- leading to inverted pigeonite.

Then using the width of the exsolution lamallae you can get the temperature it was heated to and the length of time to cool to get a history.

Is it just the same kind of idea in metamorphic rocks but to see whether the follow a square or a more gentle path on the diagram for PT?

Answer 1

i think carbon dating is a waste of research and rarely relevant

but that's just what i think.