The metapelites are of granulite facies and the ultramafics are of greenschist facies and the enclosing gneisses represent amphibolites facies.
12.
Illite crystallinity can be used to trace the low grade metamorphic transition from zeolite facies to greenschist facies ( diagenetic zone to epizone ).
13.
It is often found in minute micaceous aggregates ( with individual plates barely visible ), as a major component of chromium rich greenschist facies.
14.
If the illite crystallinity values fall in the 0-0.25 ?? range, it corresponds with a metamorphic epizone or greenschist facies.
15.
Thus, metamorphic assemblages of ultramafic rocks containing anthophyllite are indicative of at least greenschist facies metamorphism in the presence of carbon dioxide bearing metamorphic fluids.
16.
If burial continues along Barrovian Sequence metamorphic trajectories, greenschist facies gives rise to amphibolite facies assemblages, dominated by amphibole and eventually to granulite facies.
17.
In the east side of the Cullarin Block, in the east-pointing finger of the ACT, the Tabberabberan Orogeny also reached the upper greenschist facies again.
18.
Tremolite occurs as a result of contact metamorphism of calcium and magnesium rich siliceous sedimentary rocks and in greenschist facies metamorphic rocks derived from ultramafic or magnesium carbonate bearing rocks.
19.
The original 20 30 m thick Homestake Formation, has been deformed and metamorphosed, resulting in upper greenschist facies of siderite-phyllite, and lower amphibolite facies of grunerite schists.
20.
The deposits show evidence of an Early Cretaceous, amphibolite facies event and a younger, mid-Cretaceous lower greenschist facies event which resulted from the accretion of the Yukon-Tanana Terrane.
