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Yakobi Island

Prospect in Alaska, United States with commodities Cobalt, Copper, Gold, Nickel, Palladium, Platinum, Silver
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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. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10233951
MRDS ID A003149
MAS/MILS ID 0021140017
Record type Site
Current site name Yakobi Island
Alternate or previous names South Takanis, Tunnel, Mayflower Claims, Bohemia Basin, Flapjack, North Muskeg, South Muskeg, Side Hill, East Tripod, West Tripod, Portia Claims

Geographic coordinates

Point of reference Claim
Geographic coordinates: -136.42565, 57.97751 (WGS84)
Elevation 275
Location accuracy 1000(meters)

Site location context

Political divisions (FIPS codes)

Hoonah-Angoon(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Sitka D-8(quadrangle 1:63,360 scale)

Sitka NW(quadrangle 1:100,000 scale)

Sitka W OE(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Central Southeast Alaska(hydrologic accounting unit)

Southeast Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Tongass 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 045 S 055 E 12 SESWSE Alaska

Commodities

Commodity Importance
Cobalt Critical Secondary
Copper Primary
Gold Tertiary
Nickel Critical Primary
Palladium Critical Tertiary
Platinum Critical Tertiary
Silver Tertiary

Materials information

Materials Type of material
Chalcopyrite Unknown
Magnetite Unknown
Pentlandite Unknown
Pyrrhotite Unknown

Nearby scientific data

Claim (1) -136.42565, 57.97751
ListMap

Economic information

Ore body information

  • Strike N60E
    Dip 45N
    Length 427M
    Width 365M
    Area 60HA
    Depth to top 5M
    Field Value
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 MASSIVE
    Type of Orebody #2 MASS SULFIDE
    Shape of Orebody #2 TABULAR
    Primary mode of Origin MAGMATIC DIFFER
    Primary Ore Control IGNEOUS
    Degree of Wallrock Alter. UNKNOWN
    Type of Wallrock Alter. #1 UNKNOWN
    Strike And Dip N60E:45N
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 5
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 60
    Date of Last Modification 860926

Comments on the geologic information

  • ROCK HOSTING ORE IS A NORITE

Economic information about the deposit and operations

Operation type Surface
Development status Prospect
Commodity type Metallic
Significant Yes
Discovery year 1921
Mining method Open Pit
Milling method Flotation

Mining district

District name Chichagof District

Mineral rights holdings

Type of mineral rights Located Claim
Type of mineral rights Patented

Land status

Ownership category Private

Ownership information

  • Type Owner-Operator
    Owner Galactic Resources Ltd
    Interest 50
    Home office Canada
    Year 1984
  • Type Owner-Operator
    Owner Cornucopia Resources Ltd
    Interest 50
    Home office Canada
    Year 1984

Reserves and resources

  • Type In-situ
    Estimate year 1978
    Indicated 21860000mt ore
    Demonstrated 21860000mt ore
    Total resources 21860000mt ore
    Commodity Subtype Grade units Group Importance Year
    Nickel Ni 0.3099 wt-pct Nickel Major 1978
    Copper Cu 0.18 wt-pct Copper Major 1978
    Cobalt Co 0.04 wt-pct Cobalt Minor 1978
    Silver Ag 4.9 g/mt Silver Trace 1978
    Gold Au 0.31 g/mt Gold Trace 1978
    Platinum Pt 0.19 g/mt PGE Trace 1978
    Palladium Pd 0.12 g/mt PGE Trace 1978
  • Type In-situ
    Estimate year 1984
    Total resources 19958000mt ore
    Commodity Subtype Grade units Group Importance Year
    Nickel Ni 0.33 wt-pct Nickel Major 1984
    Copper Cu 0.21 wt-pct Copper Major 1984
    Cobalt Co 0.04 wt-pct Cobalt Minor 1984

Comments on the reserve resource information

  • CONTAINS BOHEMIA BASIN, MENTIONED IN MAY 1979 E/MJ. OTHER NAMES: S. TAKANIS, N. MUSKEG, S. MUSKEG, SIDE HILL, TUNNEL, EAST TRIPOD, W. TRIPOD, MAYFLOWER CLAIMS, PORTA CLAIMS.

Workings at the site

  • Type of workings Surface
    Area 20HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Percent Waste Rock 66
    Avg. Overburden Thickness 2
    Primary Material Cover M-HARD ROCKS
    Percentage 100
    Hardness of Ore HARD ROCKS
    Avg. Bench Height (meters) 6
    Max. Pit Slope (degrees) 45
    Capacity 5000
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 80
    Unit Production Cost 13.24
    Units of Production $/MT ORE
    Operating Days per Year 330
    Operating Shifts per Day 2
    Year of Information 1984

Reference information

Bibliographic references

  • Ownership

    ALASKA KARDEX 114-003

  • Ownership

    ALASKA KARDEX 114-014

  • Ownership

    ALASKA KARDEX 114-020

  • Ownership

    ALASKA KARDEX 114-124A

  • Ownership

    ALASKA KARDEX 114-153A

  • Reserve-Resource

    IDC 7803 pp. 1-2

  • Reserve-Resource

    SR38 p. 46, No. 103

  • Deposit

    ECON G 2409 pp. 521-541

  • Deposit

    B773d pp. 95, 98-105, 113

  • Deposit

    B800 pp. 348-351, 373, 389

  • Deposit

    IR JCR 380421 p. 1

  • Deposit

    PE114-9

  • Deposit

    B917A p. 104

  • Deposit

    B931F pp. 118-125, 127-130, 132-138

  • Deposit

    B936I pp. 221-243

  • Deposit

    MR191-5 p. 2

  • Deposit

    WAR MINERALS REPORT174

  • Deposit

    B947C pp. 42-43, 45-56

  • Deposit

    RI3950

  • Deposit

    RI4182

  • Deposit

    C252 p. 7

  • Deposit

    B1198C p. 7

  • Deposit

    B1223 pp. 13, 36-37

  • Deposit

    ADGS AR 1966a p. 65

  • Deposit

    B1246 pp. 143-144

  • Deposit

    MF467

  • Deposit

    P792 p. 91

  • Deposit

    OF78-450 pp. 20-21

  • Deposit

    SRI

  • Deposit

    E&MJ 7905 p. 84, No. 219

  • Deposit

    OF81-122 p. 98, No. 2-3

  • Deposit

    OF82-719 p. 10, No. 241

  • Deposit

    AMR 81-82 pp. 15, 26, 39, 43

  • Deposit

    MTA 82 No. F-19

  • Deposit

    IC8869

  • Deposit

    SR31 pp. 8, 15

  • Deposit

    SR33 p. 10

  • Deposit

    SR38 pp. 14, 46, No. 103

  • Deposit

    USBM RI 4168

  • Deposit

    USBM OFR 10-88

Comments on the references

  • PARKINSON, EA & MULAR, AL-,1972, CIM SPECIAL VOLUME 13

General comments

Subject category Comment text
Deposit USGS CRIB W000320 USGS CRIB W016493 USGS CRIB A003149 OWNER ADDRESS: GALACTIC RESOURCES LTD. 789 WEST PENDER STREET 15TH FLOOR VANCOUVER, B.C. V6C 1H2 OWNER ADDRESS: CORNUCOPIA RESOURCES LTD. ROYAL GEORGE BUILDING 149 EAST 15TH STREET NORTH VANCOUVER, B.C. V7L 2P7 COBALT RECOVERY NOT CONSIDERED IN THIS EVALUATION COBALT GRADES OF 0.02% REPORTED BY PREVIOUS OWNERS

Reporter information

Type Date Name Affiliation Comment
Reporter 24-SEP-1996 Ges 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.