Portland Mine

The Portland Mine is a gold and silver mine located in Mohave county, Arizona at an elevation of 2,041 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: Portland Mine

Commodity

Primary: Gold
Primary: Silver

Location

State: Arizona
County: Mohave
District: Pilgrim District

Land Status

Land ownership: Federal
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: Western States Minerals
Home Office: Bullhead, Ariz
Years: 1988 -

Production

Not available

Deposit

Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Year First Production: 1935
Year Last Production: 1941
Discovery Year: 1920
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: Y
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

Structure

Not available

Alterations

Not available

Rocks

Name: Andesite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic

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

Analytical Data

Not available

Materials

Gangue: Quartz

Comments

Comment (Workings): 100 FT SHAFT (INACCESSIBLE) 1-900 FT TUNNEL RUNS ON SURFACE LEVEL, SOUTH TUNNEL 200 FT LONG, NORTH TUNNEL 100 FT LONG, 100 FT DRIFT.

Comment (Location): ON SW SLOPE OF THE BLACK MOUNTAINS. ; INFO FROM LAND.ST :(1980)

Comment (Production): IN 1988, OPEN PIT GOLD MINE WITH CYANIDE HEAP LEACH; RECOVERY BY CARBON ADSORPTION.

Comment (Development): OPERATORS INCLUDED: GOLDEN STANDARDS MINING CORP. PIONEER MINING, INC., PORTLAND MINES, INC., DEE BROTHERS & WILSON, VANDYCE HAMREN. 1984-86: WESTERN STATES DRILLED ALTERATION ZONES TO DISCOVER ADDITIONAL RESERVES FOR CURRENT OPERATION.

References

Reference (Deposit): ARIZONA DEPARTMENT OF MINES AND MINERAL RESOURCES, 1988, DIRECTORY OF ACTIVE MINES IN ARIZONA 1987-88: DIRECTORY, 13 P.

Reference (Deposit): ADMR-PORTLAND MINE FILE.

Reference (Deposit): USBM FILE DATA CLUSTER NO 1439-PORTLAND MINE.

Reference (Deposit): USGS IC 6901, 1936, P. 48.

Reference (Deposit): USBM-ABGMT FILE DATA.

Reference (Deposit): NIEMUTH, N.J., 1987, ARIZONA MINERAL DEVELOPMENT 1984-1986: ARIZONA DEPARTMENT OF MINES AND MINERAL RESOURCES DIRECTORY 29, 46 P.

Reference (Deposit): SAWYER, M.B., GURMENDI, A.C., DALEY, M.R., AND HOWELL, S.B., 1992, PRINCIPAL DEPOSITS OF STRATEGIC AND CRITICAL MINERALS IN ARIZONA: UNITED STATES BUREAU OF MINES SPECIAL PUBLICATION, 334 P.

Reference (Other Database): CIMRI

Reference (Reserve-Resource): NIEMUTH, 1987.

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.