Cow Camp North mine

Mica Mine in Avery county, North Carolina

Cow Camp North mine

Principal periods worked Pre-WWII, 1957
Workings Cut 100, 8, adits, drifts
Description of muscovite Brownish green, "A" structure, stained, bent.
Shape Lenses, pinch and swell.
Size 0-4 T
Strike NW
Dip NE
Relation to wallrock Partly concordant
Wallrock Interlayed hornblende and biotite gneiss
Extent of weathering Weathered (15 ft).
Remarks Pl-Q-M pegmatite, fine-grained.
Source of information USGS

Geographic context

Abbreviations

Principal periods worked
WWI World War I
WWII World War II
int intermittent
Production
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