What minerals are found in serpentinite?

What minerals are found in serpentinite?

The final mineral composition of serpentinite is usually dominated by lizardite, chrysotile, and magnetite. Brucite and antigorite are less commonly present. Lizardite, chrysotile, and antigorite are serpentine minerals.

Does greenschist have garnet?

Thin beds and small lenses of calcareous rocks occur within the pelitic hornfels. The marble or calc-silicate rocks contain diopside, garnet, tremolite, clinozoisite, wollastonite and biotite. Bouldery and pebbly slate is common, interpreted as metamorphosed mélange.

What is the parent rock of greenschist?

Usually, the best you can do when finding a chlorite schistose rock is to find out what the parent is. If the parent is a shale the rock is a greenschist. If basalt the rock is greenstone….Chlorite. Epidonte. Actinolite.

Where is greenschist formed?

Greenschist facies prevail in the middle levels of oceanic crust and upper levels of orogenic belts. Many supracrustal rocks in Archean terranes are metamorphosed at greenschist facies, hence the name “greenstone belts.”

Is serpentine worth anything?

Some of the metamorphic rocks produced here are composed almost entirely of serpentine minerals. These serpentine-rich rocks are known as “serpentinites.” They are often the source of valuable minerals that might include magnetite, chromite, chrysoprase, jade, and serpentine.

Which of these mineral assemblages is characteristic of a greenschist facies?

Greenschist facies The facies is named for the typical schistose texture of the rocks and green colour of the minerals chlorite, epidote and actinolite. Characteristic mineral assemblages are: In metabasites: chlorite + albite + epidote ± actinolite, quartz.

Where are greenschist facies found?