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El Cap Gold

Prospect 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. Commodities
  6. Materials information
  7. Alteration
  8. Mineral occurrence model information
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10308684
Record type Site
Current site name El Cap Gold

Geographic coordinates

Geographic coordinates: -133.29286, 56.12973 (WGS84)
Relative position The dump on this prospect is less than 100 feet from the shoreline on El Capitan passage, just north of the mouth of Tokhini Creek, northeast Kosciusko Island. Located to within 100 feet in section 23, T. 66 S., R. 78 E.

Site location context

Political divisions (FIPS codes)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Petersburg A-4 NW(quadrangle 1:24,000 scale)

Petersburg S(quadrangle 1:100,000 scale)

Petersburg(quadrangle 1:250,000 scale)

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

Commodities

Commodity Importance
Gold Primary
Silver Secondary

Materials information

Materials Type of material
Gold Ore
Calcite Gangue
Quartz Gangue

Alteration

  • None noted.

Mineral occurrence model information

Model code 273
USGS model code 36a
Deposit model name Low-sulfide Au-quartz vein
Mark3 model number 27

Nearby scientific data

(1) -133.29286, 56.12973
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = A gold-quartz-calcite veins occurs along faults in Silurian greenschist the veins roughly parallel a limestone-greenschist contact to the southwest of the prospect (Brew, and others, 1984). Two steeply dipping veins are exposed, the longer of which extends for about 500 feet with a maximum thickness of about 3 feet (Maas, Bittenbender, and Still,1995). Visible gold is present in the veins but apparently there are few other ore minerals present. The gold values are erratic. Sampling showed gold values up to 2,027 ppm (59.0 ounces per ton) but most values were lower, and silver values only reached a maximum of 50.0 ppm.
  • Age = Unknown.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Active

Mining district

District name Ketchikan

Comments on the production information

  • Production Notes = Probably none.

Comments on the reserve resource information

  • Reserves = In view of the limited amount of data, reserve calculations were considered unwarranted by Maas, Bittenbender, and Still, (1995) who sampled the property.

Comments on the workings information

  • Workings / Exploration = Mass, Bittenbender, and Still (1995) state that the deposit was originally found in 1962 but the claims allowed to lapse; the property was restaked in 1967. It has been active since. Property developed by eight trenches and a short adit. A mineral survey has been done on the property with intent to patent it. A map of the property is in Maas, Bittenbender, and Still (1995).

Reference information

Bibliographic references

  • Deposit

    Brew, D. A., Ovenshine, A. T., Karl, S. M., and Hunt, S. J., 1984, Preliminary reconnaissance geologic map of the Petersburg and parts of the Port Alexander and Sumdum 1:250,000 quadrangles, southeastern Alaska: U.S. Geological Survey Open-File Report 84-405, 43 p., 2 sheets, scale 1:250,000.

  • Deposit

    Maas, K.M., Bittenbender, P E., and Still, J.C., 1995, Mineral investigations in the Ketchikan mining district, southeastern Alaska: U.S. Bureau of Mines Open-File Report 11-95, 606 p.

Comments on the references

  • Primary Reference = Maas, Bittenbender, and Still, 1995

General comments

Subject category Comment text
Deposit Model Name = Low-sulfide gold-quartz vein (Cox and Singer, 1986, model 36a)

Reporter information

Type Date Name Affiliation Comment
Reporter 01-NOV-1998 H.C. Berg and D.J. Grybeck 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.