Bokan Mountain

Past Producer in Alaska, United States with commodities Uranium, Thorium, REE, Niobium (Columbium), Beryllium, Lead, Fluorine-Fluorite

Geologic information

Identification information

Deposit ID 10000497
MRDS ID A010684
Record type Site
Current site name Bokan Mountain
Alternate or previous names Ross-Adams Mine, I+L Prospects, Atom-Marietta Prospect, Carol Ann Prospect
Related records 10185438

Geographic coordinates

Geographic coordinates: -132.14066, 54.91084 (WGS84)
Elevation 290
(click for info)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • LOCATION GIVEN IS FOR ROSS-ADAMS MINE, OTHER LOCATIONS ARE TO THE EAST LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Commodities

Commodity Importance
Uranium Primary
Thorium Tertiary
REE Tertiary
Niobium (Columbium) Tertiary
Beryllium Tertiary
Lead Tertiary
Fluorine-Fluorite Tertiary

Comments on the commodity information

  • LIST OF MINERALS IS PARTIAL

Materials information

Materials Type of material
Brannerite Ore
Galena Ore
Monazite Ore
Parisite Ore
Thorite Ore
Uraninite Ore
Xenotime Ore
Albite Gangue
Cordierite Gangue
Pyrite Gangue
Quartz Gangue
Riebeckite Gangue
Tourmaline Gangue
Zircon Gangue

Analytical data

Result ANALYSES OF ORE GAVE 0.18-3.2% U (AVERAGE OF 1.08%), 0.76-5.66% TH (AVERAGE OF 2.65%) AND FROM O TO SEVERAL PERCENT RAE

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock
    Stratigraphic age (youngest) Middle Jurassic
    Stratigraphic age (youngest) Eocene
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
  • Host or associated Associated
    Rock type Plutonic Rock > Pegmatite
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite > Peralkaline Granite
    Rock unit name Bokan Mountain Granite
    Rock description Bokan Mountain Granite
    Chronological age 186
    Dating method K-Ar
    Stratigraphic age (youngest) Middle Jurassic
    Chronological age 181
    Dating method K-Ar
    Stratigraphic age (youngest) Middle Jurassic
    Chronological age 171
    Dating method U-Pb (zircon)
    Type of media Zircon
    Stratigraphic age (youngest) Middle Jurassic
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite > Peralkaline Granite
    Chronological age 186
    Dating method K-Ar
    Stratigraphic age (youngest) Middle Jurassic
    Chronological age 181
    Dating method K-Ar
    Stratigraphic age (youngest) Middle Jurassic
    Chronological age 171
    Dating method U-Pb (zircon)
    Type of media Zircon
    Stratigraphic age (youngest) Middle Jurassic

Nearby scientific data

(1) -132.14066, 54.91084

Geologic structures

Type of structure Local
Structure description Many Steep Faults Cut Ore Body

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both metallic and non-metallic
Deposit size Medium
Significant No
Discovery year 1955
Discoverer Don Ross And Kelly Adams
Discovery method Geophysical Anomaly
Year of first production 1957
Year of last production 1971

Mining district

District name Ketchikan District

Land status

Ownership category National Forest

Ownership information

  • Type Operator
    Owner Standard Metals Co.
  • Type Owner
    Owner Kendrick Bay Mining Co.

Production statistics

  • Year 1951
    Period 1957-1951
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Uranium Uranium 1wt-pct

Comments on the production information

  • ORE WAS AT LEAST AS RICH IN THORIUM, BUT IT WAS NOT RECOVERED

Comments on the reserve resource information

  • ADDITIONAL RESERVES AND RESOURCES HAVE BEEN LOCATED IN LATE 1970'S, BUT TONNAGE AND GRADE ARE UNPUBLISHED

Comments on the workings information

  • MINING FROM AN OPEN PIT AT FIRST. UNDERGROUND WORKINGS MAY HAVE BEEN DEVELOPED LATER

Comments on development

  • EXPLORATION HAS CONTINUED AT LEAST THROUGH 1982, BUT URANIUM PRICES ARE TOO LOW FOR MINING

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A010684

Bibliographic references

  • Deposit

    USGS BULLETIN 1154, P. 62-73

  • Deposit

    ADGGS GEOLOGIC REPORT 44, P. 7,9-10

  • Deposit

    USGS OPEN FILE 76-246, P. 33-34

  • Deposit

    ADGGS SPECIAL REPORT 31, P. 9

  • Deposit

    CAN J EARTH SCI, VOL 20, NO 2, P. 236-245

  • Deposit

    ECON GEOL V 73, NO 4, P. 512-523

  • Production

    USGS OPEN FILE 76-246

General comments

Subject category Comment text
Deposit VEINLETS AND DISSEMINATIONS OF ORE ARE IN FUSIFORM SHAPED ZONE WITHIN PERALKALINE INTRUSION. ALSO, SEVERAL INTERESTING PROSPECTS TO THE EAST, (I+L, ETC.) ARE IN VEINS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1984 Hirschmann, M. M. (Elliott, R. L.) U.S. Geological Survey