result of metasomatic overprinting of the original oxygen isotope composition, driving them back towards the mantle range.

Eclogite facies

This facies reflects metamorphism at high pressure (at or over 12kbar) and moderately high to very high temperatures. The pressures exceed those of greenschist, blueschist, amphibolite or granulite facies.

Eclogites containing lawsonite (a hydrous calcium-aluminium silicate) are rarely exposed at Earth's surface, although they are predicted from experiments

1.Previous
3.Next