Mount Brack

Occurrence in Alaska, United States with commodities Antimony, Arsenic, Cadmium, Copper, Gold, Lead, Silver, Zinc

Geologic information

Identification information

Deposit ID 10282822
MRDS ID A013120
MAS/MILS ID 0021090007
Record type Site
Current site name Mount Brack
Related records 10002219

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -136.28771, 59.10663 (WGS84)
Elevation 909
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 032 S 054 E 10 SESWSE Alaska


Commodity Importance
Antimony Tertiary
Arsenic Tertiary
Cadmium Primary
Copper Tertiary
Gold Tertiary
Lead Tertiary
Silver Tertiary
Zinc Tertiary

Materials information

Materials Type of material
Albite Unknown
Ankerite Unknown
Arsenopyrite Unknown
Calcite Unknown
Chalcopyrite Unknown
Chlorite Unknown
Dolomite Unknown
Goethite Unknown
Graphite Unknown
Illite Unknown
Muscovite Unknown
Pyrite Unknown
Pyrrhotite Unknown
Quartz Unknown
Sericite Unknown
Sphalerite Unknown
Illite Unknown

Nearby scientific data

Ore Body (1) -136.28771, 59.10663

Ore body information

  • Depth to top 0M
    Area 100HA
    Field Value
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 SHEAR ZONE
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FRACTURING
    Degree of Wallrock Alter. MODERATE
    Type of Wallrock Alter. #1 CARBONITIZATION
    Type of Wallrock Alter. #2 SILICIFICATION
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 100
    Date of Last Modification 830408

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1966

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 0021090007
USGS Mineral Resources Data System MRDS A013120 MAS references MRDS

Bibliographic references

  • Deposit

    P632 pp. 4, 40, 53-55

  • Deposit


  • Deposit

    OF78-316 p. 99

  • Deposit

    OF78-494 plates 1A, 1B, 2

Reporter information

Type Date Name Affiliation Comment
Reporter 12-FEB-88 Wlg U.S. Bureau of Mines