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Unnamed (near Peak 5420)

Prospect in Alaska, United States with commodities Silver, Arsenic, Gold, Barium-Barite, Copper, Nickel, Antimony, Zinc
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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. Mineral occurrence model information
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10308253
Record type Site
Current site name Unnamed (near Peak 5420)

Geographic coordinates

Geographic coordinates: -136.31213, 59.30974 (WGS84)
Relative position This prospect is at the head of Porcupine Creek in prominent cliff exposures between the elevations of 3,600 and 5,400 feet on the northwest side of Peak 5420. It was informally termed the 'Quartz Swarm' prospect by Still and others (1991).

Site location context

Political divisions (FIPS codes)

Haines(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

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

Skagway SE(quadrangle 1:100,000 scale)

Skagway C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Chilkat-Skagway Rivers(hydrologic unit)

Northern Southeast Alaska(hydrologic accounting unit)

Southeast Alaska(hydrologic subregion)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Arsenic Critical Secondary
Gold Secondary
Barium-Barite Critical Secondary
Copper Secondary
Nickel Critical Secondary
Antimony Critical Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrrhotite Ore
Quartz Gangue

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Nearby scientific data

(1) -136.31213, 59.30974
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = According to Still and others (1991), this prospect was discovered by Merril Palmer in 1984. It consists of swarms of quartz veins in slate and metabasalt exposed in prominent cliffs that (like SK052) appear to be in a roof pendant surrounded by diorite. The veins average about 0.5 to 1.5 feet thick and extend for hundreds of feet along strike. The vein swarms are many hundreds of feet across and extend for more than a thousand feet vertically. Sixty samples were collected from the veins and surrounding wall rocks. Gold values were generally low; 6 samples, mostly of quartz veins, contained 0.005 to 0.09 ppm gold. The 60 samples also contained up to 2.4 ppm silver, 390 ppm zinc, 150 ppm copper, 3,000 ppm barium, 700 ppm arsenic, 200 ppm nickel, and 3,000 ppm antimony. Samples collected through 1,500 feet of elevation and 4,000 feet across structure showed no potentially economic gold values. The sedimentary and basaltic protoliths to the slate and metabasalt are Paleozoic in age . The veins and mineralization are probably Cretaceous or younger in age, based on their probable genetic relationship to the surrounding diorite (MacKevett and others, 1974).
  • Age = Probably Cretaceous or younger based on the age of the surrounding diorite (MacKevett and others, 1974).

Economic information about the deposit and operations

Development status Prospect

Comments on exploration

  • Status = Probably inactive

Mining district

District name Juneau (Skagway subdistrict)

Comments on the workings information

  • Workings / Exploration = Discovered by Merill Palmer in 1984.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Still and others, 1991

General comments

Subject category Comment text
Deposit Model Name = Based on limited information, these are probably polymetallic quartz veins (Cox and Singer, 1986; model 22c).

Reporter information

Type Date Name Affiliation Comment
Reporter 04-FEB-01 T.C. Crafford T. Crafford & Associates

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.