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Hoover Hill Mine

Past Producer in Randolph county in North Carolina, United States with commodities Gold, Silver, Zinc, Copper, Lead
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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. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Production statistics
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10026506
MRDS ID K005183
Record type Site
Current site name Hoover Hill Mine

Geographic coordinates

Geographic coordinates: -79.97284, 35.75148 (WGS84)
Relative position 9.5 MILES WEST - NORTHWEST OF ASHEBORO AND 10.7 MILES SOUTHWEST OF RANDLEMAN.

Site location context

Political divisions (FIPS codes)

Randolph(county)

North Carolina(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Glenola(quadrangle 1:24,000 scale)

Chapel Hill(quadrangle 1:100,000 scale)

Raleigh(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Yadkin(hydrologic unit)

Upper Pee Dee(hydrologic accounting unit)

Pee Dee(hydrologic subregion)

South Atlantic-Gulf(hydrologic region)

Geographic areas

Country State County
United States North Carolina Randolph

Commodities

Commodity Importance
Gold Primary
Silver Primary
Zinc Critical Tertiary
Copper Tertiary
Lead Tertiary

Materials information

Materials Type of material
Bornite Ore
Galena Ore
Gold Ore
Pyrite Ore
Sphalerite Ore
Biotite Gangue
Chlorite Gangue
Quartz Gangue

Alteration

  • (Local) Quartz, Potash Feldspar, Sericite, Chlorite, Biotite

Mineral occurrence model information

Model code 104
USGS model code 25a
Deposit model name Hot-spring Au-Ag
Mark3 model number 45

Host and associated rocks

  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Rock unit name Tillery Formation
    Rock description Tillery Formation
    Stratigraphic age (youngest) Late Cambrian
    Stratigraphic age (youngest) Late Cambrian

Nearby scientific data

(1) -79.97284, 35.75148
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Northwest-Trending Group Of Northeast-Trending Silicified Pods

Ore body information

  • General form BLANKET AND PODS
    Length 300M
    Width 4M
    Depth to bottom 106M

Controls for ore emplacement

  • Fault Zone

Comments on the geologic information

  • ORE PODS HAVE TOTAL THICKNESS OF AT LEAST 100 FT. PODS STRIKES N 40 DEG E AND DIPS 50 DEG NW. THE ORE PODS ARE ALLIGNED IN A N 20 W ORIENTATION. THE QUARTZ VEINS AND VEINLETS ARE LOCALLY ZONED AND SHOW OPEN-SPACE FILLING TEXTURES AND MAY FORM COMPOSITE VEINS WITH POTASH FELDSPAR. A BLANKET-LIKE ZONE OF SILICIFICATION, POTASH ENRICHMENT AND PYRITIZATION ALTERS THE HOST-ROCKS. THE GOLD IS REPORTED TO HAVE BEEN FOUND IN FIVE OR SIX PARALLEL PODS. THE MINERALIZED ZONES RANGE FROM 6 TO 50 FT. IN THICKNESS AND AVERAGES 15 FT. IN THE WALL ROCK, PYRITE CUBES AS LARGE AS ONE INCH ON A SIDE WERE FOUND.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1848
Discoverer Joseph Hoover
Year of first production 1848
Year of last production 1895
Production years 1848, 1881-1895

Production statistics

  • Year 1895
    Period 1848-1895
    Accuracy Estimate
    Description Cp_Grade: ^Estimated To Be 0.5 Opt Au. Mine Was Known For Its High Grade-Pockets
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 14g/mt

Workings at the site

  • Type of workings Underground
    Overall depth 106M

Comments on the workings information

  • THE DEPOSIT WAS WORKED FROM TWO MAIN SHAFTS, THE DEEPEST OF WHICH WAS 350 FT. IN 1968, FOUR MAIN SHAFTS WERE LOCATED ON THE PROPERTY. MANY SMALLER SHAFTS AND ADITS ARE IN THE WORKINGS. SHAFTS WERE WATER FILLED TO WITHIN 100 FEET OF THE COLLAR IN 1968.

Comments on development

  • MINE WAS WORKED FOR SEVERAL YEARS AFTER ITS DISCOVERY IN 1848 BY JOSEPH HOOVER. IN 1881 THE MINE WAS REACTIVATED BY THE HOOVER HILL MINING CO., LTD., OF LONDON, ENGLAND, OPERATIONS CONTINUED UNTIL 1895. IN 1914, THE MINE WAS DEWATERED AND A SMALL PRODUCTION WAS REPORTED IN THAT YEAR. SOME PRODUCTION WAS ALSO REPORTED IN 1917. TOTAL PRODUCTION WAS REPORTED TO BE $350,000.

Reference information

Bibliographic references

  • Deposit

    CARPENTER, P. A., III, 1976, METALLIC MINERAL DEPOSITS OF THE CAROLINA SLATE BELT, NORTH CAROLINA: NORTH CAROLINA MINERAL RESOURCES SEC. BULL. 84, 166 P.

  • Deposit

    PARDEE, J. T., AND PARK, C. F., JR., 1948, GOLD DEPOSITS OF THE SOUTHERN PIEDMONT: U.S. GEOLOGICAL SURVEY PROF. PAPER 213, 156 P.

  • Production

    PARDEE AND PARK, 1948;

General comments

Subject category Comment text
Deposit SEE COMMENTS ON GEOLOGY

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1976 Mcdaniel, Ronald D. North Carolina Division of Land Resources
Updater 01-JUN-1991 Klein, T.L. U.S. Geological Survey

Beyond USGS

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

Maps centered on this site