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Case Mine

Past Producer in Alaska, United States with commodities Gold, Silver
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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. Production statistics
  15. Reserves and resources
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10282986
MRDS ID A010359
MAS/MILS ID 0020950112
Record type Site
Current site name Case Mine
Alternate or previous names Grant Lake Development Co.
Related records 10000310

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -149.31088, 60.49953 (WGS84)
Elevation 457
Location accuracy 500(meters)

Site location context

Political divisions (FIPS codes)

Kenai Peninsula(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Seward B-7(quadrangle 1:63,360 scale)

Seward SW(quadrangle 1:100,000 scale)

Seward(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Kenai Peninsula(hydrologic unit)

Kenai Peninsula(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 005 N 001 E 29 NWNE Alaska

Commodities

Commodity Importance
Gold Primary
Silver Tertiary

Materials information

Materials Type of material
Arsenopyrite Unknown
Chalcopyrite Unknown
Galena Unknown
Gold Unknown
Pyrite Unknown

Nearby scientific data

Main Entrance (1) -149.31088, 60.49953
ListMap

Economic information

Ore body information

  • Strike N70E
    Dip 70W
    Width 0.3M
    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 N70E:70W
    Date of Last Modification 880427

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
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 J. F. Case And E. E. Whitney
    Interest 100
    Home office Alaska
    Year 1911
  • Type Owner
    Owner Grant Lake Development Co.
    Interest 100
    Home office Alaska
    Year 1981

Production statistics

  • Year 1980
    Description Total Reported Production 123 Oz. Ag
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Silver Silver 3825.72g
  • Year 1980
    Description Total Reported Production 792 Oz. Au
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 24633.95g

Reserves and resources

  • Type In-situ
    Estimate year 1980
    Indicated 297mt ore
    Demonstrated 297mt ore
    Total resources 297mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 22 g/mt Gold Major 1980
    Silver Ag 5.6 g/mt Silver Trace 1980

Comments on the workings information

  • Three adits occur at elevations of approximately 457, 469, and 488 meters. The lower level consists of a 3 meter adit, the intermediate level contains 51.8 meters of workings, 9 meters of which have been stoped to the surface. The upper level consists of 12.2 meters of drift. MINERAL SURVEY NO. 2243

Reference information

Bibliographic references

Reporter information

Type Date Name Affiliation Comment
Reporter 18-MAY-1988 Dwb U.S. Bureau of Mines

Beyond USGS

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

External references

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.