The Gneiss Belt is made up of felsic gneisses and amphibolites that were metamorphosed in the upper amphibolite to granulite facies.
22.
A granulite may be visually quite distinct with abundant small pink or red pyralspite garnets in a'granular'holocrystalline matrix.
23.
Serpentinite is unstable at mantle temperatures and is readily dehydrated to granulite, amphibolite, talc & ndash; schist and even eclogite.
24.
The three sections, respectively called the Gneiss Belt, Metasedimentary Belt, and the Granulite terrane are all separated by shear zones.
25.
The Northern Region lacks evidence of granulite facies and in the Southern Region an earlier 2.73 Ga event is recognised locally.
26.
In continental crustal rocks, biotite may break down at high temperatures to form orthopyroxene + potassium feldspar + water, producing a granulite.
27.
The minerals present in a granulite will vary depending on the parent rock of the granulite and the temperature and pressure conditions experienced during metamorphism.
28.
The minerals present in a granulite will vary depending on the parent rock of the granulite and the temperature and pressure conditions experienced during metamorphism.
29.
This terrane is formed of Paleoproterozoic granulite amphibolite facies, and the other is the Predivinsk terrane which is mostly Neoproterozoic island-arc accretion.
30.
If burial continues along Barrovian Sequence metamorphic trajectories, greenschist facies gives rise to amphibolite facies assemblages, dominated by amphibole and eventually to granulite facies.
