Ross-Adams Mine

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

Geologic information

Identification information

Deposit ID 10000239
MRDS ID A010276
Record type Site
Current site name Ross-Adams Mine
Related records 10234039

Geographic coordinates

Geographic coordinates: -132.14066, 54.91084 (WGS84)
Elevation 290
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Geographic areas

Country State
United States Alaska

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
Parisite Ore
Uraninite Ore
Acmite Gangue
Albite Gangue
Cordierite Gangue
Pyrite Gangue
Quartz Gangue
Riebeckite Gangue
Tourmaline Gangue
Zircon Gangue

Analytical data

Result CHEMICAL ANALYSIS OF ORE GAVE 0.18-3.2% U AND AVERAGED 1.08% U, 0.76-566% THE AND AVERAGED 2.65%

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Pegmatite
    Rock unit name Bokan Mountain Granite
    Rock description Bokan Mountain Granite
    Stratigraphic age (youngest) Eocene
  • 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

Ore body information

  • General form PIPE
    Thickness 12.19M
    Width 15.24M
    Length 54.86M

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
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.

Comments on the production information

  • ORE WAS EQUALLY RICH IN THORIUM, BUT EXTRACTION METHODS WERE TOO COSTLY AND THORIUM WAS NOT RECOVERED

Comments on the reserve resource information

  • ADITIONAL RESERVES AND RESOURCES HAVE BEEN DISCOVERED IN PLATE 1970'S, BUT TONNAGE AND GRADE ARE UNNAVAILABLE

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 THROUGH 1982, BUT URANIUM PAKES ARE TOO LOW FOR MINING.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A010276

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

    USGS OPEN FILE 78-863/P.6-87

  • Production

    USGS OPEN FILE 76-246

General comments

Subject category Comment text
Deposit ORE BODY IS A FUSIFORM SHAPED AREA OF MINERAL CONCENTRATION WITHIN IGNEOUS INTRUSION. ORE MINERALS ARE IN VEINLETS AND DISSEMINATIONS WITHIN THIS BODY.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-NOV-1983 Hirschmann, M. M. (Elliott, R. L.) U.S. Geological Survey