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Phoenix Mine

Past Producer in Cabarrus county in North Carolina, United States with commodities Gold, Copper, Tungsten, Barium-Barite, 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. Mining district
  16. Ownership information
  17. Production statistics
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10026447
MRDS ID K005078
Record type Site
Current site name Phoenix Mine
Alternate or previous names Miami, Vanderbilt

Geographic coordinates

Geographic coordinates: -80.49897, 35.34982 (WGS84)
Relative position 6 MI SOUTHEAST OF CONCORD AND 4.9 MI SOUTHWEST OF MT PLEASANT

Site location context

Political divisions (FIPS codes)

Cabarrus(county)

North Carolina(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Locust(quadrangle 1:24,000 scale)

Charlotte(quadrangle 1:100,000 scale)

Charlotte(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Rocky(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 Cabarrus

Comments on the location information

  • DIGITIZED FROM STROMQUIST AND HENDERSON, 1985

Commodities

Commodity Importance
Gold Primary
Copper Primary
Tungsten Critical Tertiary
Barium-Barite Critical Tertiary
Lead Tertiary

Comments on the commodity information

  • GOLD AND SULFIDE BEARING QUARTZ VEINS IN DIABASE IN COUNTRY ROCK OF DARK GREENISH GRAY ANDESITIC TUFF; THREE PARALLEL QUARTZ VEINS MINED; THE MAIN VEIN, THE PHOENIX, 0.7M TO 1M WIDE STRIKES N 70 DEGREES E AND DIPS 80 DEGREES NW; WAS TRACED 700M ON SURFACE AND MINED UNDERGROUND FOR A DISTANCE OF ABOUT 235M TO A DEPTH OF 200M; THE PHOENIX VEIN WAS THE NORTHWESTERN VEIN; THICKNESS OF ORE DECREASED IN PHOENIX VEIN WITH DEPTH ABOUT 0.3M AT 70M AND 5 CM TO 7 CM AT 161M; ORE HAS NATIVE GOLD AND 3 TO 60 PERCENT SULFIDES OF PYRITE, CHALCOPYRITE AND TRACES OF GALENA; MILL ASSAY $10.00 PER TON WITH $7.50 IN SULFIDE VALUES; GOLD CLORINATION RECOVERY 90 TO 95 PERCENT; THE MIDDLE VEIN, NAMED THE MIDDLE VEIN, WAS 70M SOUTHEAST OF THE PHOENIX VEIN AND WAS MINED BY OPEN PIT; ORE WAS GOLD-BEARING SULFIDE MASSES ASSAYING $36.00 PER TON; THE THIRD VEIN WAS ABOUT 334M SOUTHEAST OF THE MIDDLE VEIN; SURFACE ORE WAS GOLD AND SILVER BEARING SULFIDES OF MOSTLY CHALCOPYRITE ASSAYING 22 PERCENT COPPER AND $42.00
  • GOLD AND SILVER PER TON WITH GOLD AT $20.00 PER OUNCE AND SILVER AT $1.29 PER OUNCE; THE ORE GANGE WAS QUARTZ AND BARITE; BOTH THE THIRD AND MIDDLE VEINS WERE MINED TO SHALLOW DEPTHS; MINE WORKED FROM BEFORE 1856 TO 1889, AND FROM 1900 TO 1906; PHOENIX VEIN HAD SIX SHAFTS, DEEPEST 200M; OTHER MINERALS INCLUDE BORNITE, SIDERITE AND CALCITE, WITH SCHEELITE REPORTED.

Materials information

Materials Type of material
Barite Ore
Bornite Ore
Chalcopyrite Ore
Galena Ore
Gold Ore
Pyrite Ore
Scheelite Ore
Calcite Gangue
Quartz Gangue
Siderite Gangue

Alteration

  • (Local) Chloritic, Epidote, Carbonate

Analytical data

Result OXIDIZED ORE CONTAINED FROM 0.5-1.5 OPT AU
Result SULFIDE ORE CONTAINED 0.5 TO 1 OPT AU AND 1 TO 3% COPPER. ORE RANGE FROM 3 TO 60% SULFIDES. PHOENIX VEIN MILL ASSAY OF 0.3 OPT AU
Result MIDDLE VEIN (70 M SE OF PHOENIX) 1.1 OPT GOLD IN SULFIDE-RICH MASSES
Result COPPER VEIN 334 M SE OF MIDDLE VEIN 22% COPPER, 2 OPT COMBINED GOLD AND SILVER (CONTAINED BARITE GANGUE). TUNGSTEN ASSAY OF MILL TAILINGS 0.05 TO 0.15 % WO3.

Mineral occurrence model information

Model code 273
USGS model code 36a
Deposit model name Low-sulfide Au-quartz vein
Mark3 model number 27

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Tuff
    Rock unit name Cid Formation
    Rock description Cid Formation
    Stratigraphic age (youngest) Late Permian
    Stratigraphic age (youngest) Early Cambrian
    Stratigraphic age (youngest) Early Cambrian
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Gabbro

Nearby scientific data

(1) -80.49897, 35.34982
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Northwesterly- And Norhteasterly-Trending Shear Zones

Ore body information

  • General form TABULAR
    Strike N 57 DEG W; N 70 W
    Dip 80-85 DEG NW
    Thickness 1.22M
    Length 235M
    Depth to bottom 200M
  • General form TABULAR
    Dip 80-85 DEG NW

Controls for ore emplacement

  • Quartz Veins In Small-Scale Northwesterly-Trending Shear Zones And Northeast-Trending Zone. Bedding Control Of Possible Massive Sulfide. Possible Remobilizatoin Of Massive Sulfide Deposits.

Comments on the geologic information

  • HOST ROCK IS VARIED. BROWN (1934) REPORTS CHLORITE-EPIDOTE ALTERED DIORITE AND MAFIC TUFF. THREEuNORTHEAST-TRENDING (N 70 E 80 NW DIPPING)uVEINS (PHOENIX, MIDDLE, AND COPPER) ARE PRESENT IN NW TO SE POSITION. THEuDEPOSIT IS PROBABLY NEAR THE CONTACT OF A LARGE PALEOZOIC GABBRO INTRUSION.uRHYTHMIC BANDING OF SULFIDES AND CARBONATE IS PARALLEL TO QUARTZ VEIN BOUNDARY.uLATE CARBONATE VEINS CROSSCUTT EARLIER METAL-BEARING QUARTZ CARBONATE VEINS.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Deposit size Medium
Significant No
Discovery year 1856
Year of last production 1906

Mining district

District name Concord Area

Ownership information

  • Type Owner
    Owner Carolina Tungsten Mining Corp.

Production statistics

  • Year 1906
    Period 1856-1906
    Accuracy Estimate
    Description Cp_Grade: ^Estimate 50,000 Tons Of Ore Produced At 0.3 Opt Au
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 8g/mt

Workings at the site

  • Type of workings Underground
    Length 1000M
    Overall depth 180M
    Overall length 164.59M

Comments on the workings information

  • DEEPEST SHAFTS WERE 600 FT DEEP AND NUMEROUS LEVELS WERE DRIVEN FROM THESE SHAFTS. TOTAL LENGTH OF WORKINGS 1000 M.

Comments on development

  • OPERATIONS STARTED PRIOR TO 1856 AND CEASED IN 1889. MINE WAS ACTIVE AGAIN FROM 1900 TO 1906. IN 1969 SHAFTS WERE FILLED WITH TRASH AND SOME WORKINGS HAD BEEN DESTROYED BY THE CONSTRUCTION OF A GOLF COURSE.

Reference information

Bibliographic references

  • Analytical Data

    PARDEE AND PARK, 1948;

  • 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.

  • Deposit

    NITZE, H.B.C., 1896, GOLD DEPOSITS OF NORTH CAROLINA: NORTH CAROLINA GEOLOGICAL SURVEY BULL. NO. 3, 200P.

  • Production

    CARPENTER, 1976

General comments

Subject category Comment text
Deposit POSSIBLE REMOBILIZATON OF KUROKO-TYPE MASSIVE SULFIDE DEPOSITu(COPPER "VEIN") BECAUSE OF HIGH COPPER CONTENT AND BARITE-RICHuGANGUE. PROBABLY ONLY A SMALL AMOUNT OF GOLD PRODUCTION FROMuTHE MASSIVE SULFIDE. VEINS RANGE FROM STRINGERS AT DEPTH (600uFT LEVEL) TO 1.2 M AT SHALLOWER DEPTHS. THE VEIN AVERAGES 38 CMuFOR A DISTANCE OF SEVERAL HUNDRED METERS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1976 D'Agostino, John P. U.S. Geological Survey
Reporter 01-JUL-1976 Mcdaniel, Ronald D. North Carolina Division of Land Resources
Updater 01-JUN-1992 Klein, T.L. U.S. Geological Survey

Beyond USGS

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

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