Franklin Buchanan mine

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

Franklin Buchanan (Lee Cook) mine

Principal periods worked WWII
Workings 3 cuts, adit
Description of muscovite Green, tide, biotite inclusions, cracked, ruled, hairlined.
Production Small sheet
Shape Irregular, pipe.
Size 5-10 T, 200 L
Strike NE
Dip Steep NW
Plunge NE
Relation to wallrock Partly concordant
Wallrock Interlayered hornblende and biotite gneiss
Remarks Pl-Q-M pegmatite, medium grained; accessory garnet. Pipelike mass consists of connected lenses in the zone of contorted gneiss.
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