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  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Gray Brothers

Prospect in Alaska, United States with commodity Gold
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mineral rights holdings
  12. Land status
  13. Ownership information
  14. Reserves and resources
  15. Links to other databases
  16. Bibliographic references
  17. Reporter information

Geologic information

Identification information

Deposit ID 10185765
MRDS ID A010399
MAS/MILS ID 0020950055
Record type Site
Current site name Gray Brothers
Related records 10093944

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -147.84117, 60.85816 (WGS84)
Elevation 472
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Valdez-Cordova(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Seward D-3(quadrangle 1:63,360 scale)

Seward NE(quadrangle 1:100,000 scale)

Seward(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Eastern Prince William Sound(hydrologic unit)

Prince William Sound(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Chugach National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State
United States Alaska

Public Land Survey System information

Meridian Township Range Section Fraction State
Seward 009 N 009 E 22 NWSENW Alaska

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Arsenopyrite Unknown
Pyrite Unknown
Pyrrhotite Unknown

Nearby scientific data

Main Entrance (1) -147.84117, 60.85816
ListMap

Economic information

Ore body information

  • Strike N30E
    Dip 90E
    Length 305M
    Width 4.6M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 LENTICULAR
    Type of Orebody #2 REPLACEMENT
    Shape of Orebody #2 TABULAR
    Type of Orebody #3 DISSEMINATED
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FAULTING
    Secondary Ore Control FOLDING
    Degree of Wallrock Alter. UNKNOWN
    Type of Wallrock Alter. #1 UNKNOWN
    Strike And Dip N30E:90E
    Date of Last Modification 880427

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Deposit size Small
Significant No

Mineral rights holdings

Type of mineral rights Located Claim

Land status

Ownership category National Forest

Ownership information

  • Type Owner
    Owner Gray Brothers
    Interest 100
    Home office Alaska
    Year 1913

Reserves and resources

  • Type In-situ
    Estimate year 1979
    Indicated 220458mt ore
    Demonstrated 220458mt ore
    Total resources 220458mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 0.56 g/mt Gold Major 1979

Comments on the workings information

  • USGS CRIB A003021 USGS CRIB A003021 Workings consist of a 4.6 m.-long trench at the 533 m. elevation, a 12.2 m.-long adit at the 472 m. elevation, and a prospect pit.

Reference information

Bibliographic references

Reporter information

Type Date Name Affiliation Comment
Reporter 27-APR-88 AHC U.S. Bureau of Mines

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.