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Jenkins Ore Bank Magnetite Mine

Past Producer in Mitchell county in North Carolina, United States with commodities Iron, Titanium, Metal
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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 10102374
MRDS ID K004787
Record type Site
Current site name Jenkins Ore Bank Magnetite Mine
Alternate or previous names Magnetic City Openings

Geographic coordinates

Geographic coordinates: -82.18985, 36.1362 (WGS84)
Relative position LOWER WEST SLOPE OF FORK RIDGE, 0.9 MILE NNE OF CAMPBELL CEMETERY

Site location context

Political divisions (FIPS codes)

Mitchell(county)

North Carolina(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Iron Mountain Gap(quadrangle 1:24,000 scale)

Johnson City(quadrangle 1:100,000 scale)

Johnson City(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Nolichucky(hydrologic unit)

French Broad-Holston(hydrologic accounting unit)

Upper Tennessee(hydrologic subregion)

Tennessee(hydrologic region)

Federal lands

Pisgah National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Croatan National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

National Forests in North Carolina(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States North Carolina Mitchell

Comments on the location information

  • LOCATION IS APPROXIMATE, AFTER KEITH (1907). A SECOND CUT IS ABOUT 350 FT. ABOVE CREEK LEVEL, AND A THIRD OPENING IS NEAR THE RIDGE TOP.

Commodities

Commodity Importance
Iron Primary
Titanium, Metal Critical Tertiary

Materials information

Materials Type of material
Magnetite Ore
Epidote Gangue
Hornblende Gangue

Analytical data

Result THE ORE FROM ANOTHER PIT NEAR THE TOP OF THE RIDGE IS MARKEDLY TITANIFEROUS: 54.48% FE, 6.58% SIO2, 0.023% S, 0.033% P, 4.96% TI, AND 0.060 P - FE RATIO. ORE FROM THE JENKINS LOWER CUT CONTAINED: 63.41% FE, 0.012% P, AND A P - FE RATION OF 0.019.

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 Associated
    Rock type Plutonic Rock > Pegmatite
  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss

Nearby scientific data

(1) -82.18985, 36.1362
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Northeast
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 PINCH AND SWELL, LENS
    Thickness 5.49M

Comments on the geologic information

  • BAYLEY (1923) STATES THAT THE ORE MATERIAL IS REPORTED TO BE LIKE THAT AT THE CRANBERRY MINE, THAT THE GANGUE IS SIMILAR, BUT THE ORE - GANGUE RELATIONSHIPS ARE NOT KNOWN. THE ORE AT THE TWO UPPER CUTS ARE DIFFERENT IN THAT THE ORE IS LUSTROUS, COMPACT, AND FREE FROM GANGUE WITH THE EXCEPTION OF THE UPPER PORTION WHICH CONTAINS NUMEROUS QUARTZ VEINS. MOREOVER, THE TWO UPPER CUTS DIFFER IN THAT HORNBLENDE - EPIDOTE GANGUE IS ABSENT.

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 production information

  • PRODUCTION NOT KNOWN, BUT IS SAID TO HAVE SUPPLIED A FORGE AT MAGNETIC CITY N. C. (NOW BULADEAN).

Comments on the workings information

  • BAYLEY (1923) DESCRIBES THE MINE AS A "...LARGE OPEN CUT 100 FEET LONG ALONG THE STRIKE OF THE VEIN." OTHER OPENINGS UPSLOPE ARE SIMPLY DESCRIBED AS SMALLER, WITH THE COUNTRY ROCK STRIKING N 55 E AND DIPPING 45 SE.

Comments on development

  • ECON.COM: THE MAGNETITE IS EASILY SEPARATED FROM THE GANGUE AND IS VERY LOW IN PHOSPHOROUS 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

    KEITH, ARTHUR, 1907C, DESCRIPTION OF THE ROAN MOUNTAIN QUADRANGLE (TENNESSEE - NORTH CAROLINA): U.S. GEOLOGICAL SURVEY ATLAS, FOLIO 151.

  • Deposit

    1907 GEOLMAP KEITH, ARTHUR, USGS FOLIO 151

  • 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

  • Production

    BAYLEY, W. S., 1923, P. 130.

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." ; INFO.SRC : 1 PUB LIT

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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