Aldridge mine

Mica Mine in Avery county, North Carolina

Aldridge mine

Principal periods worked Pre-WWII, WWII
Workings 15 short, adits, small cuts, and prospect pits.
Description of muscovite Brown, clear, small, locky
Production Small sheet
Shape Tabular
Size 2 bodies, 10 T
Strike NW
Dip Gentle SW
Relation to wallrock Concordant
Wallrock Biotite gneiss
Remarks Pl-Q-M-B pegmatite, medium grained; accessory vermiculite
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