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Bruce Mine

Past Producer in Yavapai county in Arizona, United States with commodities Copper, Gold, Silver, Zinc
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Mineral rights holdings
  13. Land status
  14. Ownership information
  15. Reserves and resources
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. Reporter information

Geologic information

Identification information

Deposit ID 10210370
MRDS ID M800223
MAS/MILS ID 0040250016
Record type Site
Current site name Bruce Mine
Alternate or previous names Old Dick
Related records 10048170

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -113.22937, 34.54644 (WGS84)
Elevation 1139
Location accuracy 10(meters)

Site location context

Political divisions (FIPS codes)

Yavapai(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Bagdad(quadrangle 1:24,000 scale)

Bagdad(quadrangle 1:100,000 scale)

Prescott(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Santa Maria(hydrologic unit)

Bill Williams(hydrologic accounting unit)

Lower Colorado(hydrologic subregion)

Lower Colorado(hydrologic region)

Federal lands

ST(Federal land areas administered by ST)

Geographic areas

Country State County
United States Arizona Yavapai

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 014 N 009 W 20 NWNW Arizona

Commodities

Commodity Importance
Copper Primary
Gold Secondary
Silver Secondary
Zinc Critical Primary

Materials information

Materials Type of material
Arsenopyrite Unknown
Chalcopyrite Unknown
Galena Unknown
Magnetite Unknown
Pyrite Unknown
Pyrrhotite Unknown
Sphalerite Unknown
Tennantite Unknown

Nearby scientific data

Main Entrance (1) -113.22937, 34.54644
ListMap

Economic information

Ore body information

  • Strike N27E
    Dip 75W
    Thickness 11M
    Length 120M
    Width 440M
    Area 10HA
    Depth to top 290M
    Field Value
    Type of Orebody #1 REPLACEMENT
    Shape of Orebody #1 TABULAR
    Primary mode of Origin HYDROTHERMAL
    Secondary mode of Origin METAMORPHISM
    Primary Ore Control BEDDING
    Secondary Ore Control FOLDING
    Degree of Wallrock Alter. MODERATE
    Type of Wallrock Alter. #1 SILICIFICATION
    Type of Wallrock Alter. #2 SERICITIC
    Strike And Dip N27E:75W
    Minimum Depth to Top 290
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 10
    Date of Last Modification 810708

Comments on the geologic information

  • 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.

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant Yes
Discovery year 1882
Mining method Filled Stopes - Horiz Cut and Fill W/Tailings
Year of first production 1943
Milling method Flotation

Mining district

District name Eureka District

Mineral rights holdings

Type of mineral rights Patented

Land status

Ownership category Private

Ownership information

  • Type Owner-Operator
    Owner Cyprus Minerals Co, 7200 S Alton Wy, Englewood, Co 80155
    ID 200141
    Interest 100
    Home office Colorado
    Year 1993

Comments on the production information

  • 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.

Reserves and resources

  • Type In-situ
    Estimate year 1976
    Measured 115700mt ore
    Demonstrated 115700mt ore
    Total resources 115700mt ore
    Commodity Subtype Grade units Group Importance Year
    Zinc Zn 12.8 wt-pct Zinc Major 1976
    Copper Cu 3.73 wt-pct Copper Major 1976

Comments on the reserve resource information

  • 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)
  • THE BRUSE MINE HAS BEEN CLOSED SINCE 1977.

Workings at the site

  • Type of workings Underground
    Length 2200M
    Overall depth 747M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method HORIZ CUT & FILL W/TAILINGS 10-60
    Percent Waste Rock 0
    Percent Recovery 100
    Hardness of Rock UNKNOWN
    Rock Characteristics UNKNOWN
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Shafts 1
    1st Condition of Workings FLOODED
    2nd Condition of Workings PART ACCESSIBLE
    Capacity 254
    Capacity Units MT ORE/DAY
    Unit Production Cost 27.73
    Units of Production $/MT ORE
    Operating Days per Year 345
    Operating Shifts per Day 2
    Year of Information 1981

Comments on other economic factors

  • MINE TRANS COST INCLUDED IN MINE OPERATING COSTS.

Reference information

Bibliographic references

  • Geology

    ANDERSON, C. A. GEOLOGY AND ORE DEPOSITS OF THE BAGDAD AREA

  • Geology

    YAVAPAI COUNTY ARIZONA. USGS PROF. PAPER 278, 1955,

  • Geology

    103 PP.

  • Geology

    CLAYTON, R. L. THE BRUCE MINE - A CASE FOR METAMORPHIC

  • Geology

    REMOBILIZATION OF PRECAMBRIAN MASSIVE SULFIDES. 1978

  • Geology

    AIME ANN. MEETING, DENVER, CO. FEB. 28 - MARCH 2, 1978.

  • Geology

    PREPRINT NO. 78-I-49.

  • Reserve-Resource

    CYPRUS MINES 1976 ANNUAL REPORT, P. 7.

  • Workings

    SKILLINGS MINING REVIEW. NEW HOIST INSTALLED AT BRUCE ZINC

  • Workings

    MINE. JUNE 19, 1971. P 7.

  • Workings

    MINING METHODS AT BRUCE MINES. CYPRUS MINES UNPUBLISHED

  • Workings

    REPORT ON FILE USBM, IFOC, BLDG 20, DENVER FED. CENTER.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1995 Hite, Alan G. U.S. Bureau of Mines

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Current status (per MSHA)

StatusAbandoned since 07/19/1978
MSHA mine ID0200141
Mine name (MSHA)Bruce Mine
Current operatorCyprus Bruce Copper & Zinc Company
Current controller (parent)Cyprus Mines Corp
Mine typeUnderground (Metal / non-metal)

MSHA cross-reference per the original MRDS record. Mine status and operator reflect MSHA's last published Mines export (February 2025); MSHA's public bulk feed has been unavailable since, so this may be out of date. See the Mine Data Retrieval System for current status.

Open MSHA's Mine Data Retrieval System for inspections, accidents, and violations for this mine.

Maps centered on this site

Authoritative Arizona resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.