Tom Cantrell mine (N. of Powdermill Creek)

Mica Mine in Avery county, North Carolina

Tom Cantrell mine (north of Powdermilk Creek)

Principal periods worked 1956
Workings Cut 180, shaft 14, inclines, shaft 18, drift.
Description of muscovite Ruby, hard, cracked, small.
Production Small sheet
Shape Pods, lenses
Size 0.5 T, 6 L
Strike NE
Dip NW ,SE
Relation to wallrock Concordant
Wallrock Interlayered hornblende and biotite gneiss
Extent of weathering Weathered
Remarks Kaolinizeda Pl-Q-M pegmatite, medium grained.
Source of information USGS

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