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Jack Rock Mica Mine

Past Producer in Mitchell county in North Carolina, United States with commodity Mica
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Geologic information

Identification information

Deposit ID 10025154
MRDS ID K000826
Record type Site
Current site name Jack Rock Mica Mine
Related records 10296807

Geographic coordinates

Geographic coordinates: -82.0854, 36.03259 (WGS84)
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Geographic areas

Country State County
United States North Carolina Mitchell

Comments on the location information

  • SEE PLATE 3, PROF. PAPER 577 FOR LOCATION

Commodities

Commodity Importance
Mica Primary

Comments on the commodity information

  • MUSCOVITE-PALE GREEN TO LIGHT BROWN, REEVED, CRACKED, STAINED

Materials information

Materials Type of material
Muscovite Ore
Biotite Gangue
Sericite Gangue

Alteration

  • (Local) Weathered

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss
    Stratigraphic age (youngest) Neoproterozoic

Nearby scientific data

(1) -82.0854, 36.03259
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Geologic structures

Type of structure Local
Structure description Pegmatite Is Concordant With Wall Rock Structure

Ore body information

  • General form TABULAR
    Strike NE
    Dip SE
    Thickness 2.44M
    Length 13.72M

Comments on the geologic information

  • PLAGIOCLASE, QUARTZ, MUSCOVITE PEGMATITE

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Non-metallic
Significant No
Production years 1933, 1943

Mining district

District name Spruce Pine District/Hawk-Bakersville Area

Comments on the production information

  • LESS THAN 500 LBS OF SHEET MICA WAS PRODUCED.

Workings at the site

  • Type of workings Surface
    Overall length 13.72M

Comments on the workings information

  • CUT 45 FT. LONG, 15 FT. DEEP

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS K000826

Bibliographic references

  • Deposit

    LESURE, F.G., 1968, MICA DEPOSITS OF THE BLUE RIDGE IN NORTH CAROLINA: U.S. GEOLOGICAL SURVEY PROF. PAPER 577, P. 48-4

  • Deposit

    1968 COMPILE LESURE, F.G

  • Production

    LESURE, F.G., 1968, U.S.G.S. PROF. PAPER 577

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-1973 Fagan, James M. U.S. Geological Survey