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Tarr Inlet Knob

Occurrence in Alaska, United States with commodities Arsenic, Barium-Barite, Molybdenum
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Geologic information

Identification information

Deposit ID 10136918
MRDS ID A013115
MAS/MILS ID 0021090018
Record type Site
Current site name Tarr Inlet Knob
Alternate or previous names West Shore Tarr Inlet, Tarr Inlet, West Side Tarr Inlet, Locality No. 17
Related records 10002214

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -137.01043, 59.01782 (WGS84)
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 033 S 050 E 12 NWSWSW Alaska

Commodities

Commodity Importance
Arsenic Tertiary
Barium-Barite Tertiary
Molybdenum Primary

Materials information

Materials Type of material
Albite Unknown
Andesine Unknown
Apatite Unknown
Arsenopyrite Unknown
Augite Unknown
Biotite Unknown
Calcite Unknown
Chalcopyrite Unknown
Chlorite Unknown
Epidote Unknown
Garnet Unknown
Goethite Unknown
Hornblende Unknown
Muscovite Unknown
Oligoclase Unknown
Orthoclase Unknown
Pyrite Unknown
Pyrrhotite Unknown
Quartz Unknown
Sericite Unknown
Sphalerite Unknown

Nearby scientific data

Ore Body (1) -137.01043, 59.01782
ListMap

Ore body information

  • Strike N25W
    Dip 20E
    Depth to top 0M
    Area 10HA
    Field Value
    Type of Orebody #1 SHEAR ZONE
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 SEDIMENTARY
    Type of Orebody #3 DISSEMINATED
    Primary mode of Origin SEDIMENTATION
    Secondary mode of Origin HYDROTHERMAL
    Primary Ore Control FAULTING
    Secondary Ore Control FRACTURING
    Degree of Wallrock Alter. MODERATE
    Type of Wallrock Alter. #1 PYRITIZATION
    Strike And Dip N25W
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 10
    Date of Last Modification 830408

Comments on the geologic information

  • OTHER EQUALS HYDROXIDE.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Both metallic and non-metallic
Deposit size Small
Significant No
Discovery year 1937

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 0021090018
USGS Mineral Resources Data System MRDS A013115 MAS references MRDS

Bibliographic references

  • Deposit

    OF280

  • Deposit

    P632 pp. 35 & 74

  • Deposit

    C772B pp. 90-92

  • Deposit

    OF78-316 p. 63

  • Deposit

    OF78-494 plates 1A, 1B, 2

General comments

Subject category Comment text
Deposit DISC. 1966. NO CLAIMS. DEPOSIT IS IRON-STAINED ALTERED & BRECCIATED ZONES CUTTING GRANODIORITE & LESS COMMONLY HORNFELS. FEW ZONES NEAR PELSIC DIKES. 100 PPM MO, 5000 PPM AS, 1000 PPM BA. JAN C. STILL WAS AT THIS LOCALITY & DID NOT DETECT ANY MO.

Reporter information

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