What is the parent rock of chlorite schist?

Schist and gneiss can be named on the basis of important minerals that are present. For example a schist derived from basalt is typically rich in the mineral chlorite, so we call it chlorite schist….7.2 Classification of Metamorphic Rocks.

	Parent Rock
Very Low Grade	150-300°C
Low Grade	300-450°C
Medium Grade	450-550°C
High Grade	Above 550°C

What is the protolith of schist?

Schist is a crystalline metamorphic rock, mostly composed of more than 50% tabular and elongated minerals with grainsize coarse enough to be visible to the unaided eye. The protolith of schists can be igneous (e.g. basalt, volcanic tuff) or sedimentary (clay, mud).

What is the protolith for shale?

A protolith (from Ancient Greek πρωτο (prōto) ‘first’, and λίθος (líthos) ‘stone’) is the original, unmetamorphosed rock from which a given metamorphic rock is formed. For example, the protolith of a slate is a shale or mudstone. The source of the sediment of a sedimentary rock is termed its provenance.

What is the grain size of schist?

The mineral grains in a schist are typically from 0.25 to 2 millimeters (0.01 to 0.08 in) in size and so are easily seen with a 10× hand lens. Typically, over half the mineral grains in a schist show a preferred orientation.

Is phyllite a protolith?

The protolith (or parent rock) for phyllite is shale or pelite, or slate, which in turn came from a shale protolith. Its constituent platy minerals are larger than those in slate but are not visible with the naked eye.

What is the Protolith of chlorite?

Greenschist is a fine- to medium-grained foliated metamorphic rock dominated by chlorite, actinolite and epidote, with or without albite, quartz and calcite. Carobonatic protolith: calcite ± dolomite ± quartz ± micas, scapolite, wollastonite. …

What is chlorite used for?

Use. The main application of sodium chlorite is the generation of chlorine dioxide for bleaching and stripping of textiles, pulp, and paper. It is also used for disinfection of municipal water treatment plants after conversion to chlorine dioxide.

What are the example of schist?

Schist is a metamorphic rock form characterized by strong foliation so that it is readily split into thin flakes or slabs. This example of schist is from Warm Springs, Georgia where a stressed formation produces it along with quartzite and gneiss, two other metamorphic rocks.

What protolith is staurolite?

Staurolite is a common mineral in medium-grade aluminous metamorphic rocks. The composition is very rich in aluminum: Fe2Al9O6[(Si,Al)O4]4(OH)2. This indicates that the protolith had to be a clay-rich sedimentary rock. It is a hydrous mineral which makes it unstable at very high pressures.

What is the protolith of the schist rock?

What is the Protolith of schist? The crystals are larger than those of slates (macroscopically not visible) but smaller than those of gneisses (coarse grained, opposed to finely foliated schists ). The protolith of schists can be igneous (e.g. basalt, volcanic tuff) or sedimentary (clay, mud).

Which is the parent rock of mica schist?

The original parent rock (or protolith) of mica schist is shale. Phyllite could also be considered the parent rock as mica schist is a more highly metamorphosed phyllite.

What kind of minerals are found in schist?

Other common minerals in schist include quartz and feldspars that are inherited from the protolith. Muscovite schist, biotite schist, and chlorite schist (often called “greenstone”) are commonly used names. What mineral is often found in schist?

What is the role of protolith in metamorphic rocks?

In short the identify of the protolith plays a big role the identity of the metamorphic rock.