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  3. Mineral Resource Data System (MRDS)

Portage Prospect

Occurrence in Alaska, United States with commodities Gold, Copper, Lead
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Host and associated rocks
  8. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Land status
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10001373
MRDS ID A012114
Record type Site
Current site name Portage Prospect
Related records 10282649

Geographic coordinates

Geographic coordinates: -134.84924, 58.28391 (WGS84)
Relative position 2 MI NE OF FUNTER BAY

Site location context

Political divisions (FIPS codes)

Hoonah-Angoon(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Juneau B-3(quadrangle 1:63,360 scale)

Juneau SE(quadrangle 1:100,000 scale)

Juneau(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Admiralty Island(hydrologic unit)

Central Southeast Alaska(hydrologic accounting unit)

Southeast Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Tongass 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

Comments on the location information

  • BEST LOCATION: USGS GQ-100, PROSPECT 2 MI NE OF FUNTER BAY LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Commodities

Commodity Importance
Gold Primary
Copper Secondary
Lead Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone

Nearby scientific data

(1) -134.84924, 58.28391
ListMap

Economic information

Ore body information

  • General form LENSE

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Admiralty

Land status

Ownership category National Forest

Comments on the workings information

  • EXPLORED BY SMALL SHAFT AND OPEN CUTS BEFORE 1908

Comments on development

  • ACTIVE IN EARLY 1900'S

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit 1. LENTICULAR QUARTZ MASSES, SUBPARALLED TO CLEAVAGE OF ENCLOSING SLATE, CARRY PYRITE, CHALCOPYRITE AND MINOR GALENA, LOW GRADE AU VALVES BY 1900 STANDARDS; 2. NEARBY MINERALIZED BAND OF CHLORITE-MICA SCHIST CUT BY QUARTZ-CALCITE VEINLETS CONTAINING SMALL MASSES OF PYRITE AND CHALCOPYRITE ACROSS A WIDTH OF 30-40 FT
Deposit ASSAYS TOO LOW TO ENCOURAGE DEVELOPMENT; SEE ALSO: MAMMOTH-ADMIRALTY I, MANSFIELD, MAMMOTH, YOUNG BAY AND ALASKA-TREASURE; LOCATIONS IN LITERATURE DO NOT AGREE. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-1985 Leonard, Kenneth R. (Elliott, R. L.) U.S. Geological Survey
Editor 14-APR-1994 Mosier, Dan U.S. Geological Survey

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.