Pine Flats Spar mine

Mica Mine in Avery county, North Carolina

Pine Flats Spar mine

Principal periods worked 1959
Workings Cut 150 long, 50 deep
Description of muscovite Green, "A" structure bent
Production Small scrap, feldspar.
Size 50 T (?)
Wallrock Mica gneiss
Extent of weathering Partly weathered.
Remarks P-Pl-Q-M-B pegmatite, coarse-grained; accessory garnet.
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