Gardner mine

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

Gardner (Gardin?) mine

Principal periods worked WWII, 1954
Workings Cut 200, 3 adits, 70, 29, and 37.
Description of muscovite Green, cracked, tied, small
Production Small sheet
Shape Pinch and swell.
Size 1-12 T
Strike NW
Dip NE
Relation to wallrock Concordant
Wallrock Biotite gneiss
Extent of weathering Saprolite (30 ft)
Remarks Kaolinized P-Pl-Q-M pegmatite, medium grained; accessory biotite.
Source of information DMEA, CMC

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