Joe mine

Mica Mine in Avery county, North Carolina

Joe mine

Principal periods worked 1954
Workings Cut 90, adit
Description of muscovite Stained, bent, cracked
Production Small scrap
Shape Tabular
Size 2-5 T
Strike NE
Dip SE
Relation to wallrock Concordant
Wallrock Hornblende gneiss, biotite alteration
Extent of weathering Weathered (30 ft).
Remarks Kaolinized P-Pl-Q-M pegmatite; accessory biotite, garnet.
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