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Quartz Ledge

Past Producer in Gila county in Arizona, United States with commodities Fluorine-Fluorite, Gold, Silver
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Mining district
  11. Mineral rights holdings
  12. Land status
  13. Ownership information
  14. Production statistics
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10209714
MAS/MILS ID 0040070006
Record type Site
Current site name Quartz Ledge
Alternate or previous names White Cow, Porcupine

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -111.24381, 33.94197 (WGS84)
Elevation 975
Location accuracy 500(meters)

Site location context

Political divisions (FIPS codes)

Gila(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Picture Mountain(quadrangle 1:24,000 scale)

Theodore Roosevelt Lake(quadrangle 1:100,000 scale)

Mesa(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Tonto(hydrologic unit)

Salt(hydrologic accounting unit)

Salt(hydrologic subregion)

Lower Colorado(hydrologic region)

Federal lands

Tonto National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Arizona Gila

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 007 N 011 E 20 NENENE Arizona

Commodities

Commodity Importance
Fluorine-Fluorite Critical Primary
Gold Tertiary
Silver Tertiary

Nearby scientific data

Ore Body (1) -111.24381, 33.94197
ListMap

Economic information

Ore body information

  • Strike N45W
    Dip 75S
    Thickness 1.5M
    Length 214M
    Width 15M
    Area 20HA
    Depth to top 15M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 SHEAR ZONE
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 REPLACEMENT
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control IGNEOUS
    Secondary Ore Control FAULTING
    Degree of Wallrock Alter. NONE
    Strike And Dip N45W:75S
    Minimum Depth to Top 5
    Avg. Thick. Unconsol. Mat. 1
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 20
    Date of Last Modification 910924

Comments on the geologic information

  • DISTRICT ALSO UNDERLAIN BY PRECAMBRIAN GRANITE, WITH YOUNGER PRECAMBRIAN APACHE GROUP OVERLAYING IT, CRETACEOUS GRANITE INTRUDES OLDER ROCKS. THERE ARE 2 VEINS: SOUTH (PRINCIPAL) VEIN N45W, DIP 75SW, 214M LENGTH X 15M DEPTH X 1.5M THICKNESS. NORTH VEIN N40W, DIP 85SW, 91M LENGTH X 15M DEPTH X 1M THICKNESS

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Both
Significant No
Year of first production 1971

Mining district

District name Tonto Basin

Mineral rights holdings

Type of mineral rights Located Claim

Land status

Ownership category National Forest

Ownership information

  • Type Owner-Operator
    Owner Pro-Met Of Arizona, Inc.
    Interest 100
    Home office Arizona
    Year 1982

Production statistics

  • Year 1973
    Period 1971-1973
    Description Combined Fluorspar Production 1971-73 270 Total Mt Ore Produced
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Fluorine-Fluorite Fluorine 270mt

Comments on the production information

  • SURFACE GEOLOGIC MAPPING HAS BEEN DONE FOR GILA COUNTY (ARIZ BUMINES 1959). THE TEST ADIT IS A 15 DEGREE INCLINE 20M DEEP, AND IS CURRENTLY FLOODED. THE TEST PIT IS 305M LONG X 6M WIDE X 4.6-6M DEEP, AND OBSCURES MUCH OF THE SURFACE GEOLOGY. OTHER METHOD INCLUDES SOME SAMPLING BY THE CURRENT OWNER, NO ASSAYS WERE MADE AVAILABLE FOR THIS EVALUATION. THE ONLY PRODUCTION WAS 270 MT OF DEVELOPMENT ORE 1971-73 FROM THE INCLINE AND TEST PIT, NO PRODUCTION SINCE THEN.

Comments on the reserve resource information

  • NO R-DATA IS LISTED BECAUSE THERE ARE NO PUBLISHED RESERVES FOR THIS DEPOSIT, Q-MAT1 COL1 IS THE RESERVE FIGURE USED FOR THIS EVALUATION- 19800MT AT 50% CAF2. TWO OTHER UNPUBLISHED USBM REPORTS PUT RESERVES AT 816MT, GRADE 45% (WOOD 1/24/75), AND 4536-9072MT, GRADE 40-50% CAF2(STEWART 1957).
  • MAT1 COL1- REPRESENTS TONNAGE AND GRADE ESTIMATED BY EVALUATOR BASED ON OREBODY DIMENSIONS BY STEWART (1957). NO QUANTITY OR GRADE OF ORE KNOWN BY OWNER AT PRESENT TIME, THEREFORE THIS FIGURE USED FOR COSTING AND RESERVE ESTIMATE.

Workings at the site

  • Type of workings Underground
    Length 500M
    Overall depth 18M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method SHRINKAGE METHODS
    Percent Recovery 100
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics UNKNOWN
    Rock Support Chars. UNKNOWN
    Mine Support Chars. UNKNOWN
    Number of Shafts 1
    Length of Inclines (m) 20
    Slope of Inclines 15
    Number of Inclines 1
    Avg. Length of Adits (m) 0
    Capacity 127
    Capacity Units MT ORE/DAY
    Unit Production Cost 46.61
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
    Year of Information 1982

Comments on the workings information

  • NO ROAD NEEDS TO BE BUILT. HOWEVER, THE EXISTING ROAD (14KM FROM TONTO BASIN TO MILL TO QUARTZ LEDGE) WOULD NEED TO BE IMPROVED- PROBABLY WIDENED AND GRAVELED.

Comments on other economic factors

  • ACQUISITION COST OF $1,000,00 WAS PAID BY PRO-MET IN NOV 1980 FOR THE QUARTZ LEDGE, RED ROCK, BLUEBIRD, AND THE MILL. 1/3 OF THIS VALUE ($333,000) WAS CREDITED TO THE QUARTZ LEDGE- $163,000 FOR ACQUISITION COST OF THE DEPOSIT AND $170,000 FOR THE QUARTZ LEDGE SHARE OF THE MILL CAPITAL COST. MILL CAPITAL COST IS $170,000, WHICH IS THE QUARTZ LEDGE SHARE OF THE COST IN NOV 1980. THE ACTUAL COST OF CONSTRUCTING THE MILL IN 1971 WAS $600,000. MILL OPERATING COST BASED ON ACTUAL OPERATING COST OF $10/ST IN 1979 CONVERTED TO METRIC AND UPDATED TO JULY 1981.

Reference information

Bibliographic references

  • Deposit

    ARIZONA BUMINES, 1959, GEOLOGIC MAP OF GILA COUNTY, ARIZONA

  • Deposit

    ARIZONA DEPT. OF MINERAL RESOURCES, MINERALS AVAILABILITY

  • Deposit

    SYSTEM ARIZONA FLUORSPAR: GRANT NO. G0254012 FOR U.S.

  • Deposit

    BUMINES, MARCH 25, 1976, P. 2

  • Deposit

    BRAKE, E. LEVI, U.S. BUMINES HEALTH AND SAFETY REPORT ON

  • Deposit

    BLUEBIRD MINE AND MILL: AUG 16, 1971, P.1

  • Deposit

    BURGIN, LORRAINE B., 1978-79, ARIZONA: U.S. BUMINES MINERALS

  • Deposit

    YEARBOOK, VOL II, P. 70

  • Deposit

    CUMMINGS, J.B., EXPLORATION OF THE PACKARD FLUORSPAR PROPER-

  • Deposit

    TY, GILA CO., ARIZ.: U.S. BUMINES RI 3880, MAY 1946, 7P.

  • Deposit

    E/MJ, FLUORSPAR: MARCH ISSUE ANNUAL REVIEW, 1971-1981

  • Deposit

    ----, INTERNATIONAL DIRECTORY OF MINING, ARIZONA: TONTO MIN-

  • Deposit

    ING AND MILLING CO., INC., 1971-1981

  • Deposit

    ----, MARKETS: FLUORSPAR PRICES, AUGUST 1981, P.23

  • Deposit

    GUCCIONE, EUGENE, FLUORSPAR TRENDS: E/MJ, DEC 1972, P.70

  • Deposit

    HAMILTON, JACK, PERSONAL COMMUNICATION, JAN 14, FEB 10, 1982

  • Deposit

    HANDY RAILROAD ATLAS OF THE UNITED STATES, 1973, RAND MCNAL-

  • Deposit

    LY AND CO., CHICAGO, ILL.

  • Deposit

    KELLER, JACK, PERSONAL COMMUNICATION, JAN 8, 22, 1982.

  • Deposit

    KOSTICK, DENNIS S., AND RONALD J. DEFILIPPO, 1978-79, FLUOR-

  • Deposit

    SPAR: U.S. BUMINES MINERALS YEARBOOK, VOL I, P.342

  • Deposit

    KRAL, VICTOR, BLUEBIRD MINE: REPORT ON ARIZONA FLUORITE FROM

  • Deposit

    ARIZONA DEPT. OF MINERAL RESOURCES, NOV 28, 1975, 3P.

  • Deposit

    ----, QUARTZ LEDGE (WHITE COW): REPORT ON ARIZONA FLUORITE

  • Deposit

    FROM ARIZ DEPT OF MINERAL RES., DEC 20, 1975, 2P.

  • Deposit

    ----, RED ROCK: REPORT ON ARIZONA FLUORITE FROM ARIZ DEPT OF

  • Deposit

    MINERAL RES., DEC 20, 1975, 3P.

  • Deposit

    MIERITZ, RICHARD E., TONTO BASIN FLUORSPAR DISTRICT: REPORT

  • Deposit

    TO TRANSWORLD MINING SYNDICATE, MARCH 13, 1958, 6P.

  • Deposit

    MORSE, DAVID E., 1980, MINERAL FACTS AND PROBLEMS, FLUORINE

  • Deposit

    CHAPTER: U.S. BUMINES BULLETIN 671, P.303-321

  • Deposit

    STRAAM ENGINEERS, INC., 1979, CAPITAL AND OPERATING COST

  • Deposit

    ESTIMATING SYSTEM HANDBOOK: U.S. BUMINES CONTRACT NO.

  • Deposit

    J0255026

  • Deposit

    STECKLEY, R.C., AND J.F. LEMONS, A METHOD FOR UPDATING COST

  • Deposit

    ESTIMATES FOR THE MINERALS AVAILABILITY SYSTEM, BUMINES

  • Deposit

    INTERNAL REPORT, SOG, MAY 1976, 40P.

  • Deposit

    STEWART, L.A., U.S. BUMINES REVIEW OF EXAMINATION, QUARTZ

  • Deposit

    LEDGE (PORCUPINE): JULY 24, 1957, 3P.

  • Deposit

    U.S. BUMINES, FLUORINE: MINERAL COMMODITY PROFILE MCP-20,

  • Deposit

    AUG 1978, 27P.

  • Deposit

    ----, MINERALS AVAILABILITY SYSTEM COMPUTER FILE, BLUEBIRD,

  • Deposit

    RED ROCK, AND QUARTZ LEDGE PROPERTIES

  • Deposit

    U.S. FOREST SERVICE, TONTO NATIONAL FOREST CLIMATE RECORDS,

  • Deposit

    1981.

  • Deposit

    VAN ALSTINE, R.E., AND R.T. MOORE, 1969, MINERAL AND WATER

  • Deposit

    RESOURCES OF ARIZONA, FLUORSPAR CHAPTER: ARIZONA BUMINES

  • Deposit

    BULLETIN 180, P.348-357

  • Deposit

    WOOD, H.B., MEMORANDUM ON FLUORSPAR ACTIVITY AND RESERVE

  • Deposit

    FILES, RED ROCK AND WHITE COW MINES: U.S. BUMINES FILES,

  • Deposit

    JAN 24, 1974

  • Deposit

    ----, MEMORANDUM ON FLUORSPAR INDUSTRY DISCUSSING TONTO MIN-

  • Deposit

    ING AND MILLING CO.: U.S. BUMINES FILES, JAN 17, 1974

General comments

Subject category Comment text
Deposit THE DEPOSIT WAS EVALUATED FOR FLUORSPAR ONLY. ACCORDING TO THE OWNER, SOME GOLD AND SILVER VALUES HAVE BEEN FOUND, BUT NO ASSAYS OR RESERVE FIGURES WERE MADE AVAILABLE. MOST SOURCES REPORT THIS PROPERTY HAS LITTLE, IF ANY, RESERVES, AND IS NOT WORTH INVESTING IN.

Reporter information

Type Date Name Affiliation Comment
Reporter 24-SEP-1991 Camm, Thomas W. U.S. Bureau of Mines

Beyond USGS

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

Maps centered on this site

Authoritative Arizona resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.