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  3. Mineral Resource Data System (MRDS)

Portland Zinc-Lead-Copper-Silver-Gold Prospect

Occurrence in Alaska, United States with commodities Zinc, Lead, Copper, Silver, Gold
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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. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10002414
MRDS ID A013334
Record type Site
Current site name Portland Zinc-Lead-Copper-Silver-Gold Prospect
Related records 10160867, 10209675

Geographic coordinates

Geographic coordinates: -133.3775, 57.69086 (WGS84)
Elevation 53
Relative position 0.25 MI. N OF VABM NOT, ON E SHORE OF ENDICOTT ARM

Site location context

Political divisions (FIPS codes)

Hoonah-Angoon(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Sumdum C-5(quadrangle 1:63,360 scale)

Sumdum N(quadrangle 1:100,000 scale)

Sumdum(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

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)

Tracy Arm-Fords Terror Wilderness(Wilderness)

Wilderness FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • USGS B 1525, FIG. 71; USGS MF-425, LOC. 8 LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Commodities

Commodity Importance
Zinc Critical Primary
Lead Primary
Copper Primary
Silver Secondary
Gold Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Gold Ore
Sphalerite Ore
Muscovite Gangue
Pyrite Gangue
Pyrrhotite Gangue
Quartz Gangue

Analytical data

Result ASSAYS OF CHIP SAMPLES SHOW 0.52% ZN, 0.40% CU, 0.23% PB, AND TRACES OF AU AND AG, ACCORDING TO ADGGS GR1, P. 16. 8 FT. SAMPLE FROM CROSSCUT CONTAINED 0.34% ZN, 0.18% PB, 0.093% CU, 10 PPM AG, 0.10 PPM AU, ACCORDING TO USGS B 1525, P. 187.

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -133.3775, 57.69086
ListMap

Economic information

Ore body information

  • General form LENS

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1889

Mining district

District name Petersburg

Land status

Ownership category National Forest

Workings at the site

  • Type of workings Surface
    Length 92.96M

Comments on the workings information

  • 3 ADITS DRIVEN NORMAL TO SCHIST AND PHYLLITE, CONSIST OF 305 FT. OF WORKINGS.

Comments on development

  • 7 CLAIMS LOCATED IN 1889, RELOCATED 1897. 3 ADITS DRIVEN BETWEEN 1890 AND 1910. NO PRODUCTION.

Reference information

Bibliographic references

  • Deposit

    USGS B 1525, P. 187-189, FIG. 71, PLATE 1, (1984)

  • Deposit

    USGS OF 78-698, P. 22 (1978)

  • Deposit

    ADMM (ADGGS) GR1, P. 15, 16 (1962)

  • Other Database

    BAG-B-1525-FIG-71

General comments

Subject category Comment text
Deposit SILICIFIED MUSCOVITE SCHIST AND PHYLLITE CONTAIN NUMEROUS QUARTZ STRINGERS AND LENSES PARALLEL TO SCHISTOSITY. PYRITE, PYRRHOTITE, AND TRACES OF GALENA, SPHALERITE, CHALCOPYRITE, AND GOLD OCCUR AS SPARSE DISSEMINATIONS AND OCCASIONAL THIN STRINGERS PARALLEL TO FOLIATION.
Deposit NOT ECONOMICALLY WORKABLE ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1987 Niles, L.P. (Huber, D.F.) U.S. Geological Survey
Editor 14-SEP-1994 Waller, Nichelle (Mosier, Dan) U.S. Geological Survey PARSED OUT HOST ROCK AND ASSOCIATED ROCK TYPES, AGES, UNIT NAMES, AND UNIT AGES.

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.