Red mine

Mica Mine in Avery county, North Carolina

Red mine

Principal periods worked 1900, WWI, 1935, WWII, 1950's.
Workings Cut 200, adits, stopes; other cuts, adits twoa NW. Workings extend 500.
Description of muscovite Ruby, some greenish brown, moderate stain, bending, ruling. Pyrrhotite inclusions
Production Moderate sheet
Shape Irregular, lenses.
Size 5-22 T
Strike NW
Dip SW
Relation to wallrock Discordant
Wallrock Mica gneiss
Extent of weathering Weathered
Remarks P-Pl-Q-M pegmatite, medium to coarse grained; accessory sericite, biotite, garnet, vermiculite. Muscovite in rich pockets. Fine-grained pegmatite to west. Pegmatite faulted.
Source of information USGS, CMC

Geographic context


Principal periods worked
WWI World War I
WWII World War II
int intermittent
Small < 500 lb
Moderate 500-10,000 lb
Large > 10,000 lb
Size of pegmatite
D depth
L length
T thickness
avg average
Internal structure
B biotite
F feldspar
M muscovite
P perthite
Pl plagioclase
Q quartz
Source information
CMC Colonial Mica Corporation
DMEA Defense Minerals Exploration Administration
OME Office of Minerals Exploration
USGS U.S. Geological Survey
OF USGS open-file reports and maps