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Leader Mine

Past Producer in Pima county in Arizona, United States with commodities Copper, Molybdenum, Silver, Gold, Tungsten, Zinc, Wollastonite, Beryllium
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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. Materials information
  8. Alteration
  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. Land status
  17. Ownership information
  18. Production statistics
  19. Workings at the site
  20. Links to other databases
  21. Bibliographic references
  22. General comments
  23. Reporter information

Geologic information

Identification information

Deposit ID 10103734
MRDS ID M050045
Record type Site
Current site name Leader Mine
Alternate or previous names Copper Fend, Copper World, Owasko Claims
Related records 10183973

Geographic coordinates

Geographic coordinates: -110.76957, 31.85957 (WGS84)
Elevation 1452
Relative position 3 MI NW OF ROSEMONT, 1.5 MI E OF HELVETIA, 1/8 MI W OF COPPER WORLD MINE.

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Helvetia(quadrangle 1:24,000 scale)

Fort Huachuca(quadrangle 1:100,000 scale)

Nogales(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Santa Cruz(hydrologic unit)

Santa Cruz(hydrologic accounting unit)

Middle Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Federal lands

Coronado 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 Pima

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 018S 015E 13,24 SE4 (13) OF NW4 (24) Arizona

Commodities

Commodity Importance
Copper Primary
Molybdenum Primary
Silver Secondary
Gold Secondary
Tungsten Critical Tertiary
Zinc Critical Tertiary
Wollastonite Tertiary
Beryllium Critical Tertiary

Comments on the commodity information

  • MOLYBDENITE AS POCKETS AND SEAMS IN MORE SILICATED AREAS; PYRITE AND CHALCOPYRITE CLOSELY ASSOCIATED.

Materials information

Materials Type of material
Bornite Ore
Chalcocite Ore
Chalcopyrite Ore
Copper Ore
Molybdenite Ore
Powellite Ore
Scheelite Ore
Sphalerite Ore
Wollastonite Ore
Epidote Gangue
Garnet Gangue
Magnetite Gangue
Quartz Gangue

Alteration

  • (Local) Intense Silication, Pyrite-Chalcopyrite-Gossan, Skarn, Iron Staini Ng

Analytical data

Result 2 CHANNEL SAMPLES SHOW 0.0004 AND 0.002% BEO.

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Quartz Latite
    Rock unit name Continental Granodiorite;Quartz Latite
    Rock description Continental Granodiorite;Quartz Latite
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pennsylvanian
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Horquilla Limestone;Bolsa Quartzite
    Rock description Horquilla Limestone;Bolsa Quartzite

Nearby scientific data

(1) -110.76957, 31.85957
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Homoclinal; Tilting And Broad Open Folding In S, Extensive Faulting In N
Type of structure Local
Structure description Shattered Thrust Fault

Ore body information

  • General form BANDED SEAMS, IRREGULAR LENSES
    Strike N 40 E
    Dip 65 E
    Plunge direction N
    Thickness 30.48M
    Length 54.86M
    Width 2.44M

Controls for ore emplacement

  • Silicated Limestone In Thrust Fault Where Fault Is Gently Dipping

Comments on the geologic information

  • ORE GENERALLY IN BRECCIA ZONES

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Deposit size Small
Significant No

Mining district

District name Helvetia-Rosemont District

Land status

Ownership category National Forest

Ownership information

  • Type Owner
    Owner Mrs. Lon Blankenship
    Home office Tucson, Az.
    First year 1955

Production statistics

  • Year 1934
    Material MO CONC
    Accuracy Accurate
    Description Ap_Grade: ^50% Mos2 Concentrates
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    MoS2 Conc. Molybdenum Molybdenum 50wt-pct
  • Year 1942
    Period 1900-1942
    Material ORE CU
    Accuracy Estimate
    Description Cp_Grade: ^6% Cu, 1 Oz/T Ag, Minor Au
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Ore Silver Silver 28g/mt
    Ore Copper Copper 6wt-pct

Comments on the reserve resource information

  • SEVERAL THOUSAND TONS OF LOW-GRADE PYRITE-CHALCOPYRITE MINERALIZED ROCK IN A ZONE ABOUT 400 FT N OF PORTAL. POSSIBILITY OF MORE MOLYBDENITE IN MINE.

Workings at the site

  • Type of workings Underground
    Length 609.6M
    Overall depth 42.67M

Comments on the workings information

  • SHAFT AND ADIT; 60 FT VERTICAL SHAFT, ADIT, OVER 2000 FT OF WORKI NGS TO 140 FT LEVEL; MAIN ENTRANCE IS 400 FT LONG TUNNEL

Comments on development

  • ANACONDA EXPLORED DISTRICT IN 1971 FOR POSSIBLE PORPHYRY COPPER I N QUARTZ LATITE

Reference information

Bibliographic references

  • Deposit

    SCHRADER, 1915, USGS BULL 582

  • Deposit

    CREASEY & QUICK, 1955, USGS BULL 1027-F

  • Deposit

    ABM, 1971, FIELDNOTES V 1, NO 2

  • Deposit

    DREWES, 1971, USGS MAP I-613

  • Deposit

    KEITH, 1974, ABM BULL 189

  • Deposit

    PEIRCE, H.W., 1990, ARIZONA GEOLOGICAL SURVEY INDUSTRIAL MINERALS CARD FILE.

  • Other Database

    CIMRI

  • Production

    KEITH, 1974.

  • Reserve-Resource

    CREASEY AND QUICK, 1955

General comments

Subject category Comment text
Deposit MINE IS IN FOOTWALL OF THRUST FAULT. ORE IN BRECCIATED-SILICATED LIMESTONE. LARGE MASSES OF LIMESTONE HAVE BEEN COMPLETELY CONVERTED TO WOLLASTONITE.
Deposit THIS REPORT REPRESENTS A MERGER OF ORIGINAL RECORD M050045 WITH RE CORD M000573 OF JAN WILT IN MOLYBDENUM FILE, CONTACT PERSON T.G. THEOD ORE, USGS ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1983 Peterson, Jocelyn A. U.S. Geological Survey
Updater 01-NOV-1992 Orris, Greta J. 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

Authoritative Arizona resources

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