mica schist


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mica schist

[′mī·kə ‚shist]
(petrology)
A schist which is composed essentially of mica and quartz and whose characteristic foliation is mainly due to the parallel orientation of the mica flakes.
References in periodicals archive ?
The main rock types along the axis of tunnel are granite, quartz mica schist, and calcareous quartzite.
Since the failures in quartz mica schist occurred in the weathered zones, the characteristics of these weathered earth materials were studied in order to interpret the features of the morphological zones.
The lithology of the area consists of greenschists, mica schists, quartzites, hornblende schists, amphibolites, garnet-amphibolites, serpentinites and porphyritic hypabyssal rocks with andesitic to dacitic composition (Figure 1).
Phase D4 is reflected in the mica schist and migmatite by very broad (10 to 100 meters wavelength) folds, with an axial plane that is either vertical or slightly west or east-dipping.
The hole encountered variably oxidized quartzite and quartz mica schist from surface to approximately 230 feet and then passed into a mixed zone of hornfelsed sediments and granitic intrusives.
The rock mass consists of: mica schists, calcareous garnet-mica schists and limestones with thin layers of amphibolites and quartzities.
The Bishop copper prospect, the Bishop manganese mine and other nearby occurrences of iron and manganese ores are located in the Mount Athos Formation, which contains beds of quartzite, conglomerate, calcareous quartzite, marble, siliceous mica schist and ferruginous mica schist (Espenshade 1954).
The real section showed that the upper drill hole passed through mica schist with rare interbeds of biotite gneiss down to a depth of 1310 m (Kukkonen et al.
On its basis there are evolved Bites gneiss structures, "outer phyllites" lie higher and at top we can find mica schists.
Rock samples consisted of quartz mica schist and medium grained diorite intrusive containing abundant sericite alteration associated with brown iron oxide after carbonate and reddish brown hematite after pyrite.