Bardon mine

Mica Mine in Mitchell county, North Carolina, this site also known as Bordon

Bardon (Bordon) mine

Principal periods worked Pre-WWII, 1954.
Workings Cut 50, shaft 60 drifts 94
Description of muscovite Ruby, ruled, bent
Production Moderate sheet, feldspar.
Shape Tabular
Size 1-8 T
Strike NE
Dip SE
Plunge SW
Relation to wallrock Concordant
Wallrock Biotite gneiss
Remarks Pl-Q-P-M wall zone, medium grained; accessory pyrite, Q core.
Source of information USGS, DMEA

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