Chlorite In Thin Section

Large porphyroblasts of chloritoid exhibit greenish brown blue pleochroism blocky shapes and poor cleavage.

Chlorite in thin section. However the term chlorite can be used both to describe the group in general or as a specific term to describe any green member of the chlorite group whose exact identity is not practical to be determined. This chlorite grain is surrounded by sericitized feldspars. Chlorite schist the word schist is derived from the greek word schízein meaning to split which is a reference to the ease with which schists can be split along the plane in which the platy minerals lie.

Home atlas of minerals in thin section. There are also books of chlorite visible at the edges of the chloritoid infilling pressure shadows. Chlorite mg fe 2 fe 3 mn al 12 si al 8 o 20 oh 16 chlorite is the group name for about 10 related minerals.

Chlorite thin section photomicrographs are taken in plane polarized light and cross polarized light and can easily be recognized under the microscope. Alex strekeisen i vetrini della mia fantasia. The feldspars alter to sericite which is a catch all name for fine grained white mica whose identity can t be pinned down just by looking at a thin section.

Green to pale green pleochroic single cleavage and straight extinction moderate relief low order almost isotopic and anomalous interference colours see below common minerals that might be confused with chlorite and occur in similar rocks.