C and D mine

Mica Mine in Avery county, North Carolina

C and D mine

Principal periods worked 1955-56
Workings Cut 125, inclined shaft, 19
Description of muscovite Green, wedge and flat "A" structure
Production Small scrap.
Shape Tabular
Size 2-3 T
Strike NW
Dip SW
Relation to wallrock Concordant
Wallrock Mica gneiss and schist
Extent of weathering Saprolite (50 ft)
Remarks Kaolinized Pl-P-Q-M pegmatite; accessory sericite.
Source of information DMEA

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