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Firmstone Magnetite Prospect

Past Producer in Avery county in North Carolina, United States with commodities Iron, Iron, Pig Iron
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Host and associated rocks
  8. Nearby scientific data
  9. Geologic structures
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10026377
MRDS ID K004784
Record type Site
Current site name Firmstone Magnetite Prospect

Geographic coordinates

Geographic coordinates: -78.58196, 36.17147 (WGS84)
Relative position 0.9 MILE SW OF CRANBERRY CEMETERY AND 1.6 MILES SE OF CENTER OF ELK PARK

Site location context

Political divisions (FIPS codes)

Granville(county)

North Carolina(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Wilton(quadrangle 1:24,000 scale)

Henderson(quadrangle 1:100,000 scale)

Greensboro(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Tar(hydrologic unit)

Pamlico(hydrologic accounting unit)

Neuse-Pamlico(hydrologic subregion)

South Atlantic-Gulf(hydrologic region)

Geographic areas

Country State County
United States North Carolina Avery

Comments on the location information

  • LOCATION IS APPROXIMATE

Commodities

Commodity Importance
Iron Primary
Iron, Pig Iron Tertiary

Materials information

Materials Type of material
Magnetite Ore
Calcite Gangue
Epidote Gangue
Feldspar Gangue
Garnet Gangue
Hornblende Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Gneiss
    Rock unit name Cranberry Granite; Complex Of Intertonguing Rock Types Including Migmatite, Granitic Gneisses, Monzonite, Quartz Diorite, Greenstone, Mica And Hornblende Schists, Abundant Granitic Pegmatite.;Pegmatite-Age Uncertain
    Rock description Cranberry Granite; Complex Of Intertonguing Rock Types Including Migmatite, Granitic Gneisses, Monzonite, Quartz Diorite, Greenstone, Mica And Hornblende Schists, Abundant Granitic Pegmatite.;Pegmatite-Age Uncertain
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss

Nearby scientific data

(1) -78.58196, 36.17147
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Granite Becomes Less Platy And Interfoliated Gneisses Become Less Abundant As Distance From Vein Increases.

Ore body information

  • General form LINEAR, PINCH AND SWELL
    Strike NW - SE
    Dip SW
    Thickness 3.05M

Comments on the geologic information

  • BAYLEY (1923) STATES THAT "CONDITIONS IN THE VEIN...ARE THE SAME AS AT SMOKY NO. 1 AND SMOKY NO. 2." AS SUCH, THE ORE IS A MIXTURE OF MAGNETITE, HORNBLENDE, EPIDOTE, AND QUARTZ TRANSECTED BY VEINLETS OF MAGNETITE AND EPIDOTE. LENSES OF HORNBLENDE, MAGNETITE, AND MIXTURES OF THE TWO ARE ELONGATE IN THE PLANE OF THE VEIN, CONTRIBUTING TO AN APPARENT SCHISTOSITY OF THE ROCK. ORE IS CHIEFLY ALONG THE CENTER OF THE VEIN. SOME OF THE MAGNETITE IS CUT BY VEINLETS OF CALCITE AND PYRITE. VEIN BORDERS AND THE CRANBERRY GRANITE ARE SEPARATED BY CHLORITE SCHIST OR GOUGE.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No

Mining district

District name Cranberry Magnetite District

Comments on the workings information

  • GOLDICH AND WEDOW (1943) STATE THAT REPORTS ON THE PROSPECT ARE CONFLICTING; LENGTH OF THE INCLINE REPORTEDLY RANGES FROM 100 TO 300 FEET. DIP NEEDLE OBSERVATIONS REVEALED NO MAGNETIC ANOMALY BETWEEN THE FIRMSTONE AND CRANBERRY OPENINGS.

Comments on development

  • ECON.COM: THE MAGNETITE IS EASILY SEPARATED FROM GANGUE AND IS EXCEPTIONALLY LOW IN PHOSPHOROUS, TITANIUM, AND SULFUR.

Reference information

Bibliographic references

  • Deposit

    STUCKEY, J. L., 1965, NORTH CAROLINA: ITS GEOLOGY AND MINERAL RESOURCES: RALEIGH, N. C., NORTH CAROLINA DEPT. CONSERV. AND DEVEL., 550 P.

  • Deposit

    BAYLEY, W. S., 1923, THE MAGNETIC IRON ORES OF EAST TENNESSEE AND WESTERN NORTH CAROLINA: TENNESSEE DIV. GEOLOGY BULL. 29, 252 P.

  • Deposit

    KLINE, M. H., AND BALLARD, T. J., 1948, CRANBERRY MAGNETITE DEPOSITS, AVERY COUNTY, NORTH CAROLINA, AND CARTER COUNTY, TENNESSEE: U.S. BUREAU OF MINES REPT. INV. RI 4274, 85 P.

  • Deposit

    1923 OTHER BAYLEY, W. S., TENN. DIV. GEOL. BULL. 29

  • Deposit

    GOLDICH, S. S., AND WEDOW, HELMUTH, JR., 1943, PRELIMINARY REPORT ON THE MAGNETIC IRON ORES OF WESTERN NORTH CAROLINA AND EASTERN TENNESSEE: U.S. GEOLOGICAL SURVEY OPEN - FILE REPORT.

  • Deposit

    1965 COMPILE STUCKEY, J. L., N. C. DEPT. CONS. & DEVEL.

  • Deposit

    1966 COMPILE BRYANT AND REED, GEOL. SURV. CIR. 521

General comments

Subject category Comment text
Deposit ACCORDING TO BAYLEY (1923), "THE VEINS IN WHICH THE ORE OCCURS COMPRISE MORE OR LESS BANDED MIXTURES OF PEGMATITE, EPIDOTIC GNEISSES, HORNBLENDE SCHISTS AND LENTICULAR MASSES OF A MIXTURE OF HORNBLENDE AND MAGNETITE, IN PLACES CUT BY SMALL VEINS OF MAGNETITE."

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1975 Hale, Robin C. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

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