1. Mineral Resources
  2. Online Spatial Data
  3. Mica deposits of the Blue Ridge in North Carolina

White Rock (south) mine

Map
XML
JSON
KML
Mica Mine in Avery county, North Carolina

White Rock (south mine

Principal periods worked 1957
Workings 2 cuts 20, adit 41
Description of muscovite Green, "A" structure
Production Small sheet
Shape Lens
Size 20-40 T, >200 L.
Strike NW
Dip NE
Relation to wallrock Partly discordant
Wallrock Interlayered hornblende and biotite gneiss
Extent of weathering Unweathered
Remarks Pl-P-Q-M pegmatite fine to coarse grained; Q fracture fillings. Most of lens is fine-grained, locally coarse grained near hanging wall.
Source of information USGS

Geographic context

(click for info)
Geologic map unit -81.985805185, 36.03474331
Nearby scientific data Find additional scientific data near this location

Abbreviations

Principal periods worked
WWI World War I
WWII World War II
int intermittent
Production
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