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  3. Mineral Resource Data System (MRDS)

Port Houghton Copper Prospect

Occurrence in Alaska, United States with commodity Copper
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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. Geologic structures
  10. Ore body information
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10002438
MRDS ID A013360
Record type Site
Current site name Port Houghton Copper Prospect
Related records 10137039

Geographic coordinates

Geographic coordinates: -133.10191, 57.31058 (WGS84)
Elevation 229
Location accuracy 2000(meters)
Relative position 0.6 MI. E OF PEAK 2755, S OF HEAD OF NORTH ARM OF PORT HOUGHTON., Within 1 Mi. Radius, Within 1 Mi. Radius, Within 1 Mi. Radius

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 B-4(quadrangle 1:63,360 scale)

Sumdum S(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)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • USGS MF-425, LOC. 18; LOCATION MAY BE INACCURATE. LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Commodities

Commodity Importance
Copper Primary

Comments on the commodity information

  • DOUBTFUL TRACES OF AU, NI REPORTED IN ASSAY.

Materials information

Materials Type of material
Chalcopyrite Ore
Garnet Gangue
Magnetite Gangue
Pyrite Gangue
Pyrrhotite Gangue
Quartz Gangue

Analytical data

Result GRAB SAMPLE ACROSS VEIN ASSAYED 1.34% CU-USGS B 773, P. 130

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Hornblendite

Nearby scientific data

(1) -133.10191, 57.31058
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Foliation Strikes N 50 Degrees-55 Degrees W

Ore body information

  • Strike VEIN: N 50 DEGREES-55 DEGREES W
    Dip VEIN: 70 DEGREES-80 DEGREES W
    Length 137.16M
    Width 3.66M

Controls for ore emplacement

  • Shear Zone

Comments on the geologic information

  • VEIN PARALLELS STRIKE OF FOLIATION OF SCHIST. LIGHT-COLORED QUARTZ-FELDSPAR SCHIST, BLACK HORNBLENDE SCHIST.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Petersburg

Land status

Ownership category National Forest

Workings at the site

  • Type of workings Surface/Underground
    Length 68.58M
    Overall length 137.16M

Comments on the workings information

  • THREE ADITS AND THREE OPEN CUTS. TWO SHORT ADITS AND THREE OPEN CUTS CROSSCUT VEIN OVER STRIKE LENGTH OF 450 FT.. MAIN ADIT IS 60 FT. BELOW VEIN OUTCROP, AND CONSISTS OF 110 FT. TUNNEL WITH 115 FT. DRIFT FOLLOWING VEIN.

Comments on development

  • DEVELOPMENT HISTORY UNKNOWN, BUT THREE ADITS WERE DRIVEN AND THREE OPEN CUTS MADE MANY YEARS BEFORE 1923. NO PRODUCTION RECORDED. PROSPECT WAS ABANDONED BY 1923.

Reference information

Bibliographic references

  • Deposit

    USGS MF-425, LOC. 18 (1972)

  • Deposit

    USGS B 773, P. 128-130 (1925)

  • Deposit

    USGS OF 78-698, P. 21 (1978)

  • Other Database

    BAG-MF-425-18

General comments

Subject category Comment text
Deposit THIS SITE NAME WAS CREATED BY THE REPORTER OR OTHER USGS EMPLOYEE BASED ON PROXIMITY TO SOME MAJOR GEOGRAPHIC FEATURE.
Deposit FISSURE VEIN IN SHEAR ZONE BETWEEN LIGHT-COLORED QUARTZ-FELDSPAR SCHIST AND BLACK HORNBLENDE SCHIST VARIES IN WIDTH FROM 2-12 FT.. VEIN CONTAINS QUARTZ, GARNET, AMPHIBOLE, PYRRHOTITE, PYRITE, MAGNETITE, CHALCOPYRITE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-87 Niles, L.P. (Huber, D.F.) U.S. Geological Survey
Editor 14-SEP-94 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.