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Fidalgo-Alaska

Past Producer in Alaska, United States with commodities Copper, Zinc, 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. 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 10307363
Record type Site
Current site name Fidalgo-Alaska
Alternate or previous names Schlosser

Geographic coordinates

Geographic coordinates: -146.41953, 60.77359 (WGS84)
Relative position The Fidalgo-Alaska mine is at an elevation of about 500 feet, about 0.8 mile east of the mouth of Irish Cove and 0.5 mile north of peak 1430. It is in the NW1/4 sec. 2, T. 13 S., R. 7 W., of the Copper River Meridian. The site is accurately located to within 1000 ft. This mine is shown as site C-28 in Jansons and others (1984) and site #19 in Cobb (1972: MF-392).

Site location context

Political divisions (FIPS codes)

Valdez-Cordova(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cordova D-7(quadrangle 1:63,360 scale)

Cordova NW(quadrangle 1:100,000 scale)

Cordova(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Eastern Prince William Sound(hydrologic unit)

Prince William Sound(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Chugach 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
Copper Primary
Zinc Critical Primary
Silver Secondary
Gold Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Ore
Pyrrhotite Ore
Sphalerite Ore
Calcite Gangue
Quartz Gangue

Mineral occurrence model information

Model code 91
USGS model code 24b
Deposit model name Massive sulfide, Besshi (Japanese deposits)
Mark3 model number 30

Nearby scientific data

(1) Qs
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = This deposit consists of sulfide-bearing quartz-calcite veins in 150- to 300-foot-wide shear zones in folded and sheared slate and graywacke of the Tertiary Orca Group (Nelson and others, 1985). The sulfide minerals include chalcopyrite, pyrite, pyrrhotite, and sphalerite. This mine was developed and productive from 1913 to about 1920 (Cobb, 1979: OF 79-973). Five adits with the following lengths are reported (Jansons and others, 1984): 1800 ft., 540 ft., 410 ft., 250 ft., and 50 ft. U.S Bureau of Mines samples from various adit levels and of surface materials contained 0.02% to 19.5% Cu, 150 ppm to 29% Zn, 2 ppm to 15 ppm Ag, and <0.02 ppm to 5.8 ppm Au. Industry evaluation of the property was undertaken in 1986 (B. Ellis, personal commun., 2000).
  • Age = Early Tertiary age based on the age of the host rocks (Nelson and others, 1985).

Economic information about the deposit and operations

Development status Past Producer

Comments on exploration

  • Status = Inactive

Mining district

District name Copper River

Comments on the production information

  • Production Notes = 4,160,820 lbs. Cu and 1,384 oz Ag were produced from 21,434 tons of ore. Average grade was 10% Cu.

Comments on the reserve resource information

  • Reserves = Jansons and others (1984) report indicated reserves of 25,625 tons @ 3% Cu and inferred reserves of 224,000 tons @ 3.18% Cu.

Comments on the workings information

  • Workings / Exploration = This mine was developed and productive from 1913 to about 1920 (Cobb, 1979: OF 79-973). Five adits with the following lengths are reported (Jansons and others, 1984): 1800 ft., 540 ft., 410 ft., 250 ft., and 50 ft. U.S Bureau of Mines samples from various adit levels and of surface materials contained 0.02% to 19.5% Cu, 150 ppm to 29% Zn, 2 ppm to 15 ppm Ag, and <0.02 ppm to 5.8 ppm Au. Industry evaluation of the property was undertaken in 1986 (B. Ellis, personal commun., 2000).

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Jansons and others, 1984

General comments

Subject category Comment text
Deposit Model Name = Besshi massive sulfide (Cox and Singer, 1986; model 24b)
Deposit Other Comments = Crowe and others (1992; 1993) and Sainsbury (1993) discuss the genesis of the volcanogenic massive sulfide deposits in this area.. Chugach Alaska Corporation, Anchorage, Alaska has control of these lands.

Reporter information

Type Date Name Affiliation Comment
Reporter 10-JUN-00 S.W. Nelson 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.