Isle Royal Mine

The Isle Royal Mine is a copper mine located in Pima county, Arizona at an elevation of 4,800 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Isle Royal Mine
Secondary: Isle Royale

Commodity

Primary: Copper
Secondary: Silver
Tertiary: Gold
Tertiary: Molybdenum
Tertiary: Tungsten

Location

State: Arizona
County: Pima
District: Helvetia-Rosemont District

Land Status

Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Not available

Workings

Type: Underground

Ownership

Not available

Production

Year: 1912
Time Period: 1880-1912
Material type: ORE CU AG
Description: Cp_Grade: ^3% Cu, 1 Oz/T Ag

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Year: 1882
Discovery Method: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Sonoran Desert

Mineral Deposit Model

Not available

Orebody

Form: PIPE

Structure

Type: R
Description: Homoclinal, Tilting And Broad Open Folds In S, Extensive Faulting I N N

Type: L
Description: Nw Striking Thrust Fault With Limestone In Footwall And Granite In Hanging Wall, Normal Faulting

Alterations

Alteration Type: L
Alteration Text: Pyrite-Chalcopyrite-Gossan; Skarn

Rocks

Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene

Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Pennsylvanian

Analytical Data

Not available

Materials

Ore: Malachite
Ore: Chalcopyrite
Ore: Molybdenite
Ore: Chalcocite
Ore: Powellite

Comments

Comment (Commodity): MALACHITE AND AZURITE FOUND IN SUPERGENE ZONE, SECONDARY AFTER PYR ITE AND CHALCOPYRITE

Comment (Development): ANACONDA EXPLORED AREA IN 1971 SEEKING POTENTIAL PORPHYRY COPPER DEPOSIT IN INTRUSIVE QUARTZ LATITE

Comment (Deposit): ORE BODIES ON CONTACT BETWEEN INTRUSIVE AND LIMESTONE

Comment (Workings): SHAFT AND 4000 FT WORKINGS ON 7 LEVELS

Comment (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

Comment (Deposit): Discovery Year: EARLY 1880'S

References

Reference (Deposit): CREASEY, 1955, USGS BULL 1027-F

Reference (Deposit): KEITH, 1974, ABM BULL 189

Reference (Production): KEITH, 1974

Reference (Deposit): SCHRADER, 1915, USGS BULL 582

Reference (Deposit): ABM, 1971, FIELDNOTES V. 1, NO. 2

Reference (Deposit): DREWES, 1971, USGS MAP I-613

Arizona Gold

"Where to Find Gold in Arizona" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Arizona. Read more: Where to Find Gold in Arizona.