Crate Carpenter mine

Mica Mine in Avery county, North Carolina

Crate Carpenter mine

Principal periods worked WWII
Workings Cut 35, inclines shaft 20, prospect pits.
Description of muscovite Light brown, bent, ruled, stained, small.
Production Small sheet
Shape Lens
Size 1 T, 15 L
Strike NE
Dip SE
Relation to wallrock Concordant
Wallrock Mica gneiss
Extent of weathering Unweathered
Remarks Pl-Q-M pegmatite, medium grained; accessory sericite, garnet, biotite.
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