"A" mine (on Little Elk Ridge)

Mica Mine in Avery county, North Carolina

"A" mine (on little Elk Ridge)

Principal periods worked WWII?
Workings Adit 70, caved
Description of muscovite Green, "A" structure, stained, bent
Production Small sheet, scrap, feldspar.
Shape Tabular
Size 12 T
Strike NE
Dip Gentle NW
Relation to wallrock Concordant
Wallrock Interlayered hornblende and biotite gneiss
Extent of weathering Partly weathered.
Remarks Pl-P-Q-M wall zone, medium to coarse grained; Q core.
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