Bruce Mine

The Bruce Mine is a copper and zinc mine located in Yavapai county, Arizona at an elevation of 3,737 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: Bruce Mine
Secondary: Old Dick

Commodity

Primary: Copper
Primary: Zinc
Secondary: Silver
Secondary: Gold

Location

State: Arizona
County: Yavapai
District: Eureka 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

Type: Patented

Workings

Type: Underground

Ownership

Owner Name: Cyprus Minerals Co, 7200 S Alton Wy, Englewood, Co 80155
Company ID: 200141
Percent: 100.0
Home Office: Colorado
Info Year: 1993

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Mining Method: Filled Stopes - Horiz Cut and Fill W/Tailings
Milling Method: Flotation
Year First Production: 1943
Discovery Year: 1882
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

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Unknown: Arsenopyrite
Unknown: Chalcopyrite
Unknown: Galena
Unknown: Magnetite
Unknown: Pyrrhotite
Unknown: Sphalerite
Unknown: Tennantite
Unknown: Pyrite

Comments

Comment (Reserve-Resource): M1C1=R1 MINUS 36900MT (1977 PRD). 36900 MT ORE MINED IN 1977 BEFORE MINE CLOSED IN JULY 1977. ORE RESERVES ASSUMED TO BE LOCATED ON LOWEST LEVELS. ASSAY GRADES OF GOLD AND SILVER ESTIMATED USING BUMINES 1977 PRODUCTION DATA. M9C4=R1 MINUS 36900MT (1977 PRD)

Comment (Economic Factors): MINE TRANS COST INCLUDED IN MINE OPERATING COSTS.

Comment (Geology): THE BRUCE DEPOSIT IS A MASSIVE, PYRITIC, ZINC-COPPER DEPOSIT STRATABOUND IN STEEPLY DIPPING PRECAMBRIAN (1.8 BILLION YRS OLD) METAMORPHIC VOLCANICS. MASSIVE SULFIDES OCCUR IN SERICITIC SCHIST (BEDDED-TUFF ORIGINALLY) AT TOPS OF ANDESITIC FLOWS. THE DICK RHYOLITE IS A MEMBER OF THE BRIDLE FM. THE BRIDLE FM CONSISTS PRIMARILY OF METAMORPHOSED ANDESITE TO BASALTIC FLOWS, TUFFS, AND VOLCANOGENIC SEDIMENTS. THE DICK RHYOLITE IS A RHYOLITE EXTRUSIVE THAT HAS BEEN METAMORPHOSED TO A FOLIATED QUARTZ-SERICITE SCHIST.

Comment (Production): THE OLD DICK DEPOSIT IS IMMEDIATELY ADJACENT TO THE BRUCE DEPOSIT. THIS DEPOSIT WAS DISCOVERED IN 1882. THE BURIED BRUCE DEPOSIT WAS DISCOVERED IN 1964 AND THOUGHT TO BE A DEEPER EXTENSION OF THE OLD DICK DEPOSIT. CYPRUS GEOLOGISTS NOW BELIEVE THEY ARE TWO DISTINCT, BUT SIMILAR DEPOSITS.

Comment (Reserve-Resource): THE BRUSE MINE HAS BEEN CLOSED SINCE 1977.

References

Reference (Geology): 103 PP.

Reference (Geology): CLAYTON, R. L. THE BRUCE MINE - A CASE FOR METAMORPHIC

Reference (Geology): REMOBILIZATION OF PRECAMBRIAN MASSIVE SULFIDES. 1978

Reference (Geology): AIME ANN. MEETING, DENVER, CO. FEB. 28 - MARCH 2, 1978.

Reference (Geology): PREPRINT NO. 78-I-49.

Reference (Reserve-Resource): CYPRUS MINES 1976 ANNUAL REPORT, P. 7.

Reference (Workings): SKILLINGS MINING REVIEW. NEW HOIST INSTALLED AT BRUCE ZINC

Reference (Workings): MINE. JUNE 19, 1971. P 7.

Reference (Workings): MINING METHODS AT BRUCE MINES. CYPRUS MINES UNPUBLISHED

Reference (Workings): REPORT ON FILE USBM, IFOC, BLDG 20, DENVER FED. CENTER.

Reference (Geology): ANDERSON, C. A. GEOLOGY AND ORE DEPOSITS OF THE BAGDAD AREA

Reference (Geology): YAVAPAI COUNTY ARIZONA. USGS PROF. PAPER 278, 1955,

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.