Old Crow Prospect, Lazo Group

Occurrence in Alaska, United States with commodity Uranium

Geologic information

Identification information

Deposit ID 10093931
MRDS ID A010278
Record type Site
Current site name Old Crow Prospect, Lazo Group

Geographic coordinates

Geographic coordinates: -132.16844, 54.92473 (WGS84)
Elevation 305
Relative position 4350 FT N35W OF SUMMIT OF BOKAN MOUNTAIN
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Uranium Primary

Materials information

Materials Type of material
Calcite Gangue
Quartz Gangue

Alteration

  • (Local) Feldspars In Country Rock Are Altered To Clay Minerals

Host and associated rocks

  • 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

Nearby scientific data

(1) -132.16844, 54.92473

Ore body information

  • Strike N70E
    Dip 80 NW
    Thickness 0.3M

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1955

Mining district

District name Ketchikan District

Land status

Ownership category National Forest

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A010278

Bibliographic references

  • Deposit

    USGS BULLETIN 1154, P.90-91.

  • Deposit

    CAN.J. EARTH. SC1, VOL 20, NO2, P236-245

  • Deposit

    USGS OPEN FILE 78-863, P. 6-8

General comments

Subject category Comment text
Deposit MINERALIZATION IN FAULT. ANOMALOUS RADIOACTIVITY OF 0.1 MILLIROENTGENS PER HOUR DETECTED

Reporter information

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