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Big Hawk mine

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Mica Mine in Mitchell county, North Carolina

Big Hawk mine

Principal periods worked 1934, WWII
Workings Cut 53
Description of muscovite Brown, "A" structure, tied, mineral inclusions, bent.
Production Small sheet
Shape Tabular
Size 10-12 T
Strike NE
Dip SE
Relation to wallrock Concordant
Wallrock Hornblende gneiss
Remarks Q-Pl-M pegmatite, medium to coarse grained; accessory sericite, garnet.
Source of information USGS

Geographic context

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Geologic map unit -82.079603116, 36.054732697
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