Humboldt Mine

The Humboldt Mine is a copper mine located in Greenlee county, Arizona at an elevation of 4,678 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: Humboldt Mine
Secondary: Liverpool Tunnel
Secondary: Part of Arizona Copper Co Group

Commodity

Primary: Copper
Secondary: Zinc

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: 1892
Year Last Production: 1932
Discovery Year: 1892
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: M

Physiography

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

Mineral Deposit Model

Not available

Orebody

Form: DISSEMINATED

Structure

Type: R
Description: Ne Trending Fissure Veins Containing Rich Chalcocite Ore; Between The Humboldt Vein And Another Fissure Vein 200 Ft Distant Lies The Great Mass Of Concentrating Ore

Type: L
Description: Extensive Seam Impregnations Of The Country Rock Are Rarely Confined By Distinct Walls; Veins Cut Across Both Porphyry And Metamorphic Limestone; Vein Footwall Is Generally A Well-Defined Plane And Follows Porphyry Dikes In Some Places

Alterations

Alteration Type: L
Alteration Text: Surface Oxidation Of Chalcocite Zone; Chalcocite Replace Pyrite

Rocks

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

Name: Quartz Monzonite
Role: Host
Age Type: Host Rock Unit
Age in Years: 55.200000+-1.700000
Age Young: Tertiary

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

Name: Quartz Monzonite
Role: Associated
Age Type: Host Rock Unit
Age in Years: 55.200000+-1.700000
Age Young: Tertiary

Analytical Data

Not available

Materials

Ore: Sphalerite
Ore: Pyrite
Ore: Chalcocite
Ore: Chalcopyrite
Ore: Malachite
Ore: Brochantite
Gangue: Epidote
Gangue: Magnetite
Gangue: Garnet
Gangue: Pyroxene
Gangue: Hematite
Gangue: Sericite
Gangue: Limonite

Comments

Comment (Deposit): DECOMPOSED PORPHYRY SURROUNDING THE VEINS CONSIST PRIMARILY OF SERICITE, QUARTZ, PYRITE AND CHALCOCITE; ORE BODY IS ALMOST EXCLUSIVELY CONFINED TO PORPHYRY; VEINS ENTERING SEDIMENTARY MASSES BECOME NARROW AND POOR; REGIONAL FAULTING OCCURRED AFTER VEIN EMPLACEMENT; HUMBOLDT ORE BODY IS ONE OF 4 PRINCIPAL LODES AT MORENCI (OTHERS ARE THE WELLINGTON, RYERSON, AND WEST YANKIE); RICH CHALCOCITE ORE IS REPLACED AT DEPTH BY A STRONG VEIN OF MASSIVE LOW-GRADE PYRITE AND CHALCOPYRITE WITH WELL-DEFINED WALLS OF GREATLY ALTERRED PORPHYRY AND VARYING WIDTH.HUMBOLDT VEIN EXTENDS FROM NE TO SW THROUGH COPPER MOUNTAIN AND IS 1 TO 4 FT WIDE. HUMBOLDT MINE IS SITUATED ON THE HUMBOLDT AND WELLINGTON LODES

Comment (Workings): HUMBOLDT SHAFT IS LOCATED ON JOY CLAIM ADJACENT TO HUMBOLDT PROPERTY ON SOUTH AND IS 400 FT DEEP; DEVELOPMENTS INCLUDED SEVERAL CROSSCUTS, SEVERAL STOPES WITH LENGHTS OF 500 FT AND WIDTHS OF 40 FT OR LESS,HUMBOLDT TUNNEL 1650 FT LONG, LIVERPOOL TUNNEL STARTING FROM THE NW SIDE OF COPPER MOUNTAIN

Comment (Development): OPERATORS INCLUDED ARIZONA COPPER CO LTD; LOCATED ON THE JOY CLAIM

Comment (Location): SHAFT LOCATED IN W2 OF SE QUARTER OF SECTION 16; SITUATED IN THE CENTER OF TOWN (SEE USGS PROFESSIONAL PAPER 43 (1905), PAGE 41) AT THE SE FOOT OF COPPER MOUNTAIN. ; INFO FROM LAND.ST :(1973)

Comment (Production): PRODUCTION DATA INCLUDED IN LONGFELLOW METCALF MINE; LONGFELLOW METCALF ALSO INCLUDES THE OTHER ARIZONA COPPER CO MINES OF DETROIT, LONGFELLOW, METCALF, CORONADO, YAVAPAI, MAMMOTH, AND JOY MINES.

References

Reference (Other Database): CIMRI

Reference (Deposit): BENNETT, 1975, GEOLOGY AND ORIGIN OF THE BRECCIAS IN THE MORENCI-METCALF DISTRICT, GREENLEE COUNTY, AZ: MS THESIS UNIV OF AZ, 153 P.

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

Reference (Deposit): WATT, ROBERTA, 1956, HISTORY OF MORENCI ARIZONA: M.A. THESIS, UNIVERSITY OF ARIZONA, P. 39-40.

Reference (Deposit): STEVENS, H.J., 1911, THE COPPER HANDBOOK, VOL. X, PAGES 356-358, ARIZONA COPPER CO LTD.

Reference (Deposit): BLM DISTRICT SHEET 840.

Reference (Deposit): USGS PP 43, P. 270-276.

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.