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  3. Mineral Resource Data System (MRDS)

Portage 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 10233644
MRDS ID A002981
MAS/MILS ID 0020950244
Record type Site
Current site name Portage Mine
Alternate or previous names Portage Gold Mines Ltd., Portage 1-5, Foster 1-2

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -148.54679, 60.87455 (WGS84)
Elevation 457
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Anchorage(Municipality)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Seward D-5(quadrangle 1:63,360 scale)

Seward NW(quadrangle 1:100,000 scale)

Seward C(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 005 E 15 SWNENW Alaska

Commodities

Commodity Importance
Gold Primary
Silver Tertiary

Materials information

Materials Type of material
Chalcopyrite Unknown
Galena Unknown
Pyrite Unknown
Pyrrhotite Unknown
Sphalerite Unknown

Nearby scientific data

Main Entrance (1) -148.54679, 60.87455
ListMap

Economic information

Ore body information

  • Strike N60E
    Dip 59N
    Length 45.7M
    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 N60E:59N
    Date of Last Modification 880427

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Significant No

Mineral rights holdings

Type of mineral rights Located Claim

Land status

Ownership category National Forest

Ownership information

  • Type Owner
    Owner Dominic Vietti
    Interest 100
    Home office Alaska
    Year 1928
  • Type Owner
    Owner Portage Gold Mines, Ltd.
    Interest 100
    Home office Alaska
    Year 1933

Production statistics

  • Year 1980
    Description Total Reported Production Up To 1940 60 Oz. Ag
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Silver Silver 2488.27g
  • Year 1980
    Description Total Reported Production Up To 1940 490 Oz. Au
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 15240.7g

Reserves and resources

  • Type In-situ
    Estimate year 1980
    Indicated 11022mt ore
    Demonstrated 11022mt ore
    Total resources 11022mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 16.9 g/mt Gold Major 1980

Comments on the workings information

  • USGS CRIB A002982 USGS CRIB A002983 Workings consist of a 84.7 meter crosscut, a 105.2 meter drift, with approximately 67.1 meter of stoping and 73.2 meter of raises. One 48.8 meter raise reaches the surface at about 578.2 meter elevation.

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.