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 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).
The greenschists in their middle section are intercalated with layers of mica schists, such intercalations vary in thickness from millimeters to meters.
Our exploratory drilling across the geophysical anomaly in the South Area points to gold mineralization occuring as narrower intersections along the northerly trending contact zone between the amphibolite and quartz mica schists.
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.
Drill hole GU-1, located 40 metres east of the tunnel, intersected the mica schist zone and returned 9 metres (29.
Tin mineralization is focused within a chloritic, garnetiferous amphibolite unit within felsic mica schists.
The host rocks are cordierite quartzite and mica schists which grade into biotite-andalusite bearing quartzite.
Gold mineralization is preferentially hosted in quartzites and quartz mica schists and consists of brecciated zones containing sulfides and polyphase quartz veining.