Detroit Mine

The Detroit Mine is a copper mine located in Greenlee county, Arizona at an elevation of 4,902 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: Detroit Mine
Secondary: Part of Arizona Copper Co Group

Commodity

Primary: Copper
Secondary: Silver
Tertiary: Zinc
Tertiary: Manganese

Location

State: Arizona
County: Greenlee
District: Copper Mountain District

Land Status

Land ownership: Private
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: Surface/Underground

Ownership

Owner Name: Phelps Dodge Corp., Morenci Branch

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1884
Year Last Production: 1932
Discovery Year: 1884
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Mexican Highland

Mineral Deposit Model

Not available

Orebody

Form: TABULAR

Form: TABULAR

Structure

Type: R
Description: One Of Several Regional Deposits Of Carbonates And Cuprite In Limestone; East Side Of The Copper Mountain Fault

Type: L
Description: Main Ore Body Is Located Immediately Under Heavy Garnet Rock And Is About 25 Ft Thick; A Lower Ore Body Of 5 Ft Thickness Is Separated From Main Ore Body By A Barren Lime-Shale Sequence

Alterations

Alteration Type: L
Alteration Text: Upper Beds Of Modoc Limestone Altered To Garnet Rock; Ore Is Entirely Oxidized

Rocks

Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Pliocene

Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock Unit
Age in Years: 55.500000+-0.500000
Age Young: Tertiary

Analytical Data

Not available

Materials

Ore: Chalcopyrite
Ore: Malachite
Ore: Cuprite
Ore: Sphalerite
Ore: Pyrite
Ore: Chalcocite
Gangue: Garnet
Gangue: Hematite
Gangue: Kaolin
Gangue: Epidote
Gangue: Limonite

Comments

Comment (Production): PRODUCTION DATA INCLUDED IN LONGFELLOW METCALF MINE; LONGFELLOW METCALF ALSO INCLUDES THE MAMMOTH, YAVAPAI, LONGFELLOW, METCALF, CORONADO, JOY, AND HUMBOLDT MINES OF THE ARIZONA COPPER CO LTD. ORE REPORTED TO BE NEARLY EXHAUSTED IN 1905; TOTAL PRODUCTION ESTIMATED AT 150,000 TONS (SEE USGS PROFESSIONAL PAPER 43 (1905)

Comment (Development): OWNERS INCLUDED ARIZONA COPPER CO LTD.; THE DETROIT AND LONGFELLOW MINES WERE THE LARGEST PRODUCERS FOR THE ARIZONA COPPER CO LTD; DETROIT MINE SHOULD NOT BE CONFUSED WITH THE DETROIT COPPER CO MINES AT MORENCI

Comment (Workings): DEVELOPMENTS INCLUDED THE 224 FT DEEP DETROIT SHAFT WITH 4 LEVELS; CONNECTIONS TO THE JOY SHAFT. SEVERAL ADITS CONNECTED BY A MAZE OF IRREGULAR STOPES AND WORKINGS; 400 FT DEEP SOUTH SHAFT NEAR THE COPPER MOUNTAIN FAULT.

Comment (Geology): MINE LOCATED JUST SOUTH OF THE MAIN PORPHYRY CONTACT AT MORENCI. GARNET IN THE EXPOSED MODOC LIMESTONE FORMATION FORMS A CAP ROCK OF 75 TO 100 FT THICKNESS. PORPHYRY DIKES GENERALLY DO NOT CONTAIN ORE BUT ARE OCCASIONALLY CUT BY VERTICAL SEAMS OF PYRITE.

Comment (Location): LOCATED TO EAST OF MANGANESE BLUE MINE AND TO SOUTH OF COPPER MOUNTAIN MINE. ; INFO FROM LAND.ST :(1973)

Comment (Deposit): SEE ALSO: MANGANESE BLUE MINE, COPPER MOUNTAIN MINE FOR GEOLOGICAL INFORMATION. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Comment (Commodity): ORE CHIEFLY CONTAINS MALACHITE AND AZURITE; CHALCOCITE AND CUPRITE ARE RARE

References

Reference (Other Database): CIMRI

Reference (Deposit): BENNETT, K.C., 1975, GEOLOGY AND ORIGIN OF THE BRECCIAS IN THE MORENCI-METCALF DISTRICT, GREENLEE COUNTY, ARIZONA: M.S. THESIS, UNIVERSITY OF ARIZONA, 153 P.

Reference (Deposit): BLM DISTRICT SHEETS 840 AND 841.

Reference (Deposit): ABGMT CLIPPINGS FILE, ARIZONA COPPER CO LTD.

Reference (Deposit): USGS PP 43, P. 240-245.

Reference (Deposit): ABGMT-USBM FILE DATA.

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.