Nunatak 3850

Occurrence in Alaska, United States with commodity Copper

Geologic information

Identification information

Deposit ID 10209956
MAS/MILS ID 0021110151
Record type Site
Current site name Nunatak 3850
Alternate or previous names 3850 Nunatak

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -136.99273, 58.95302 (WGS84)
Elevation 1173
Location accuracy 500(meters)
(click for info)

Geographic areas

Country State
United States Alaska

Public Land Survey System information

Meridian Township Range Section Fraction State
Copper River 034 S 050 E 01 NESWNE Alaska


Commodity Importance
Copper Primary

Materials information

Materials Type of material
Actinolite Unknown
Andesine Unknown
Apatite Unknown
Biotite Unknown
Chalcopyrite Unknown
Chlorite Unknown
Diopside Unknown
Epidote Unknown
Garnet Unknown
Goethite Unknown
Hornblende Unknown
Magnetite Unknown
Muscovite Unknown
Oligoclase Unknown
Orthoclase Unknown
Pyrite Unknown
Pyrrhotite Unknown
Quartz Unknown
Sphene Unknown
Zircon Unknown

Nearby scientific data

Ore Body (1) -136.99273, 58.95302

Ore body information

  • Area 1HA
    Field Value
    Type of Orebody #1 REPLACEMENT
    Shape of Orebody #1 LENTICULAR
    Primary mode of Origin CONT METASOMATIC
    Secondary mode of Origin METAMORPHISM
    Primary Ore Control CONTACT ZONE
    Degree of Wallrock Alter. SLIGHT
    Type of Wallrock Alter. #1 PYRITIZATION
    Total Surface Area (HA) 1
    Date of Last Modification 830408

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No
Discovery year 1976

Mining district

District name Juneau District

Mineral rights holdings

Type of mineral rights Minerals Only

Land status

Ownership category National Wilderness

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
U.S. Bureau of Mines Minerals Availability System MAS 0021110151

Bibliographic references

  • Deposit

    OF78-494 pp. C25, C171, plates 1A, 1B, 2

General comments

Subject category Comment text

Reporter information

Type Date Name Affiliation Comment
Reporter 12-FEB-1988 Wlg U.S. Bureau of Mines