Alfred mine

Mica Mine in Avery county, North Carolina, this site also known as Vance

Alfred (Vance) mine

Principal periods worked Int. 1870-1929, WWII.
Workings 4 cuts, 4, adits, 2 shafts, drifts and stopes.
Description of muscovite Greenish-brown, minor stain, ruling, cracking.
Production Large sheet
Shape Irregular lenses
Size Several bodies 1-17 T.
Strike NW
Dip SW
Plunge SE
Relation to wallrock Concordant
Wallrock Interlayered biotite and hornblende gneiss
Extent of weathering Weathered (70 ft).
Remarks Pl-P-Q-M pegmatite; accessory garnet, uraninite?, vermiculite.
Source of information USGS, CMC, Sterrett (1923, p. 179-180)

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