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  3. Mineral Resource Data System (MRDS)

Keystone

Past Producer in Alaska, United States with commodities Cobalt, Copper, 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. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Mineral rights holdings
  11. Land status
  12. Ownership information
  13. Production statistics
  14. Reserves and resources
  15. Links to other databases
  16. Bibliographic references
  17. Reporter information

Geologic information

Identification information

Deposit ID 10282851
MAS/MILS ID 0020960071
Record type Site
Current site name Keystone
Alternate or previous names Threeman Copper Cop, Discovery, Scorcher, Jay, Redemption, Climax Ajax, Cliff, Montezuma, Steckmest, Petersen, Daisy, Buckeye, Threeman

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -146.54034, 60.85379 (WGS84)
Elevation 116
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cordova D-7 SW(quadrangle 1:24,000 scale)

Cordova NW(quadrangle 1:100,000 scale)

Cordova(quadrangle 1:250,000 scale)

Federal lands

Chugach National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State
United States Alaska

Public Land Survey System information

Meridian Township Range Section Fraction State
Copper River 012 S 007 W 06 SENESW Alaska

Commodities

Commodity Importance
Cobalt Critical Tertiary
Copper Primary
Silver Tertiary
Zinc Critical Tertiary

Nearby scientific data

Main Entrance (1) -146.54034, 60.85379
ListMap

Economic information

Ore body information

  • Strike N60W
    Dip 35N
    Width 5.5M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 SHEAR ZONE
    Shape of Orebody #1 LENTICULAR
    Type of Orebody #2 REPLACEMENT
    Shape of Orebody #2 TABULAR
    Type of Orebody #3 DISSEMINATED
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FAULTING
    Secondary Ore Control FOLDING
    Degree of Wallrock Alter. UNKNOWN
    Type of Wallrock Alter. #1 UNKNOWN
    Strike And Dip N60W:35N
    Date of Last Modification 881017
  • Strike N75W
    Dip 65N
    Length 107M
    Field Value
    MAS Matrix # 2
    MAS Column # 1
    Type of Orebody #1 SHEAR ZONE
    Shape of Orebody #1 LENTICULAR
    Type of Orebody #2 REPLACEMENT
    Shape of Orebody #2 TABULAR
    Type of Orebody #3 DISSEMINATED
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FAULTING
    Secondary Ore Control FOLDING
    Degree of Wallrock Alter. UNKNOWN
    Type of Wallrock Alter. #1 UNKNOWN
    Strike And Dip N75W:65N
    Date of Last Modification 881017

Comments on the geologic information

  • SCHIST SHEAR ZONES CARRY CHALCOPYRITE AND PYRRHOTITE. COUNTRY ROCK GREENSTONE, GRAYWACKE, AND SLATE. Workings consist of: Level 0 - 116.1 m. elev. - 18.3 m. of workings; Level 1 - 100.6 m. elev. - 18.3 m. of workings; Level 2 - 77.1 m. elev. - 152.4 m. of workings; Level 3 - 57.3 m. elev. - 76.2 m. of workings; Level 4 - 41.8 m. elev. - Caved; Level 5 - 21.3 m. elev. - 2 caved portals.

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Significant No

Mineral rights holdings

Type of mineral rights Patented
Type of mineral rights Located Claim

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner John Petersen
    ID 5050005
    Year 1978

Production statistics

  • Year 1904
    Description Copper Output 1359 Kilograms
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 1.35mt
  • Year 1906
    Description Copper Output 5300 Kilograms
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 5.3mt
  • Year 1910
    Description Copper Output 54360 Kilograms
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 54.36mt
  • Year 1911
    Description Silver Output 608 Ounces
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Silver Silver 18910.91g
  • Year 1911
    Description Gold Output 14 Ounces
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Gold Gold 435.44g
  • Year 1911
    Description Copper Output 78800 Kilograms
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 78.8mt
  • Year 1912
    Description Silver Output 3300 Ounces
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Silver Silver 102641.48g
  • Year 1912
    Description Gold Output 48 Ounces
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Gold Gold 1492.96g
  • Year 1912
    Description Copper Output 272253 Kilograms
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 272.25mt
  • Year 1915
    Period 1904-1915
    Description Total Silver Output 1904-1915 5308 Ounces
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Silver Silver 165097.27g
  • Year 1915
    Period 1904-1915
    Description Total Gold Output 1904-1915 101 Ounces
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Gold Gold 3141.45g
  • Year 1915
    Period 1904-1915
    Description Total Copper Output 1904-1915 525326 Kilograms
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 525.32mt
  • Year 1915
    Description Silver Output 1400 Ounces
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Silver Silver 43544.87g
  • Year 1915
    Description Gold Output 30 Ounces
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Gold Gold 933.1g
  • Year 1915
    Description Copper Output 113250 Kilograms
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 113.25mt

Reserves and resources

  • Type In-situ
    Estimate year 1984
    Inferred 2651mt ore
    Total resources 2651mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 2.3699 wt-pct Copper Major 1984
    Zinc Zn 0.35 wt-pct Zinc Trace 1984
  • Type In-situ
    Estimate year 1984
    Inferred 2096560mt ore
    Total resources 2096560mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 1.05 wt-pct Copper Major 1984
    Zinc Zn 0.19 wt-pct Zinc Trace 1984

Reference information

Bibliographic references

  • Ownership

    ALASKA KARDEX 096-048

  • Deposit

    B379e p. 95

  • Deposit

    B442h p. 165

  • Deposit

    B443 pp. 52, 54-55, 61-62

  • Deposit

    B520c p. 27

  • Deposit

    B542g pp. 97, 101-102, 108-110

  • Deposit

    B592d p. 62

  • Deposit

    B592k p. 241

  • Deposit

    B605 pp. 14, 51, 56-57, 61, 70-96

  • Deposit

    B642g p. 138

  • Deposit

    BMB142 pp. 43, 52

  • Deposit

    BMB153 p. 50

  • Deposit

    B662h pp. 184, 186

  • Deposit

    B692g pp. 144, 148

  • Deposit

    B712a p. 33

  • Deposit

    B739a p. 24

  • Deposit

    B963B p. 57

  • Deposit

    B989E pp. 298, 302

  • Deposit

    RI5245 pp. 1, 5-6

  • Deposit

    RI5320 pp. 3, 5-7, 16, 19-21

  • Deposit

    I453

  • Deposit

    B1246 pp. 69-70

  • Deposit

    MF392

  • Deposit

    OF79-973 75 pp.

  • Deposit

    MR32

  • Deposit

    OF82-1029

  • Deposit

    B1139 363 pp.

  • Deposit

    MIRL 27 p. 58

  • Deposit

    BMOF83-81 229 pp.

  • Deposit

    B622i pp. 131-139

  • Deposit

    B773e pp. 141-158

  • Deposit

    BMOF69-73

  • Deposit

    PE96-3 20 pp.

  • Deposit

    MLA5-84 218 pp., (Locality C-73)

Reporter information

Type Date Name Affiliation Comment
Reporter 17-OCT-1988 Wlg U.S. Bureau of Mines

Beyond USGS

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

Maps centered on this site

Authoritative Alaska resources

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