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Isle Royal Mine

Past Producer in Pima county in Arizona, United States with commodities Copper, Silver, Gold, Molybdenum, Tungsten
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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. 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 10039411
MRDS ID M050044
Record type Site
Current site name Isle Royal Mine
Alternate or previous names Isle Royale
Related records 10186471

Geographic coordinates

Geographic coordinates: -110.7679, 31.85791 (WGS84)
Elevation 1463
Relative position 1.25 MI E OF HELVETIA, 1000 FT S 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 24 SE4 OF NW4 Arizona

Commodities

Commodity Importance
Copper Primary
Silver Secondary
Gold Tertiary
Molybdenum Tertiary
Tungsten Critical Tertiary

Comments on the commodity information

  • MALACHITE AND AZURITE FOUND IN SUPERGENE ZONE, SECONDARY AFTER PYR ITE AND CHALCOPYRITE

Materials information

Materials Type of material
Chalcocite Ore
Chalcopyrite Ore
Malachite Ore
Molybdenite Ore
Powellite Ore

Alteration

  • (Local) Pyrite-Chalcopyrite-Gossan; Skarn

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Continental Granodiorite
    Rock description Continental Granodiorite
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pennsylvanian
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Escabrosa Limestone;Horquilla Limestone;Abrigo Formation;Bolsa Quartzite
    Rock description Escabrosa Limestone;Horquilla Limestone;Abrigo Formation;Bolsa Quartzite

Nearby scientific data

(1) -110.7679, 31.85791
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Homoclinal, Tilting And Broad Open Folds In S, Extensive Faulting I N N
Type of structure Local
Structure description Nw Striking Thrust Fault With Limestone In Footwall And Granite In Hanging Wall, Normal Faulting

Ore body information

  • General form PIPE

Controls for ore emplacement

  • Altered Limestone Along Fault

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1882
Discoverer C.E. Hughes

Mining district

District name Helvetia-Rosemont District

Land status

Ownership category National Forest

Production statistics

  • Year 1912
    Period 1880-1912
    Material ORE CU AG
    Accuracy Estimate
    Description Cp_Grade: ^3% Cu, 1 Oz/T Ag
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Ore Silver Silver 28g/mt
    Major Ore Copper Copper 3wt-pct

Workings at the site

  • Type of workings Underground
    Length 1219.2M
    Overall depth 243.84M

Comments on the workings information

  • SHAFT AND 4000 FT WORKINGS ON 7 LEVELS

Comments on development

  • ANACONDA EXPLORED AREA IN 1971 SEEKING POTENTIAL PORPHYRY COPPER DEPOSIT IN INTRUSIVE QUARTZ LATITE

Reference information

Bibliographic references

  • Deposit

    SCHRADER, 1915, USGS BULL 582

  • Deposit

    ABM, 1971, FIELDNOTES V. 1, NO. 2

  • Deposit

    DREWES, 1971, USGS MAP I-613

  • Deposit

    CREASEY, 1955, USGS BULL 1027-F

  • Deposit

    KEITH, 1974, ABM BULL 189

  • Production

    KEITH, 1974

General comments

Subject category Comment text
Deposit Discovery Year: EARLY 1880'S
Deposit ORE BODIES ON CONTACT BETWEEN INTRUSIVE AND LIMESTONE
Deposit THIS REPORT REPRESENTS A MERGER OF ORIGINAL RECORD M050044 WITH RE CORD M030533 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

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.