1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Unnamed (southwest of Red Mountain)

Occurrence in Alaska, United States with commodities Zinc, Silver, Cadmium, Molybdenum, Lead
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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. 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 10002272
MRDS ID A013176
Record type Site
Current site name Unnamed (southwest of Red Mountain)
Related records 10112753

Geographic coordinates

Geographic coordinates: -136.05016, 58.96584 (WGS84)
Relative position The deposit is near the 1000-foot elevation on an outlier to Red Mountain in section 35, T. 33 S., R. 56 E., of the Copper River Meridian. The crest of Red Mountain is about 2.5 miles to the northeast of the site which is also about 2 miles east of the anchorage at Goose Cove. It is probably located within 0.2 mile.? The site is the same as number 20 of MacKevett and others (1971), number 44 of Cobb (1972), and number 72 of Kimball and others (1978).

Site location context

Political divisions (FIPS codes)

Hoonah-Angoon(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Mount Fairweather D-1(quadrangle 1:63,360 scale)

Juneau NW(quadrangle 1:100,000 scale)

Mount Fairweather(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Glacier Bay(hydrologic unit)

Northern Southeast Alaska(hydrologic accounting unit)

Southeast Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Glacier Bay National Park(National Park)

National Park NPS(Type of land area)

NPS(Federal land areas administered by NPS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Zinc Critical Primary
Silver Secondary
Cadmium Secondary
Molybdenum Secondary
Lead Secondary

Materials information

Materials Type of material
Galena Ore
Hydrozincite Ore
Pyrite Ore
Smithsonite Ore
Sphalerite Ore
Calcite Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Late Devonian
    Stratigraphic age (youngest) Late Devonian
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Black Cap Limestone
    Rock description Black Cap Limestone

Nearby scientific data

(1) -136.05016, 58.96584
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The occurrence is in the Black Cap Limestone of Devonian age, near a granodiorite cupola of probable Cretaceous age (MacKevett and others, 1971, p. 55). Pyrite-rich pods and impregnations as much as 10 feet long and 1 foot diameter occur in the limestone.? A representative sample collected by MacKevett and others (1971, table 9) contained 7000 ppm zinc, 500 ppm lead, 70 ppm cadmium, 1.5 ppm silver and an anomalous amount (30 ppm) of molybdenum. At the site, white incrustations, either hydrozincite or smithsonite, occur as secondary minerals on the pyrite-rich mass. Sphalerite is assumed to be the primary zinc mineral. Lead is abundant enough so that galena could exist as the primary lead mineral.? the pods are too small and lean to be of significance, but they are probably distal phases of the igneous-affiliated mineral deposits of the area. The existence of anomalous quantities of molybdenum suggests a distal relation to nearby molybdenum deposits, as at the Nunatak (MF036).
  • Age = Cretaceous or younger.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Juneau

Comments on the workings information

  • Workings / Exploration = There are no workings. A sample of a partly oxidized sulfide pod in limestone exposed at the site contained 7000 ppm zinc, 500 ppm lead, 70 ppb cadmium, 30 ppm molybdenum and 1.5 ppm silver (MacKevett and others, 1971).

Reference information

Bibliographic references

  • Deposit

    MacKevett, E.M., Jr., Brew, D.A., Hawley, C.C., Huff, L.C., and Smith, J.G., 1971, Mineral resources of Glacier Bay National Monument, Alaska: U.S. Geological Survey Professional Paper 632, 90 p., 12 plates, scale 1:250,000.

  • Deposit

    Kimball, A.L., Still, J.C., and Rataj, J.L., 1978, Mineral resources, in Brew, D. A., and others, Mineral resources of the Glacier Bay National Monument wilderness study area, Alaska: U.S. Geological Survey Open-File Report 78-494, p. C1-C375.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Mount Fairweather quadrangle, AK: U.S. Geological Survey Miscellaneous Field Study Map MF-436, 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = MacKevett and others, 1971

General comments

Subject category Comment text
Deposit Model Name = Distal sulfide-rich replacement pods in limestone.
Deposit Other Comments = MacKevett and others (1971, p. 55) thought that the deposits were too small to be of economic significance. The site is in Glacier Bay National Park and Preserve.

Reporter information

Type Date Name Affiliation Comment
Reporter 14-APR-99 Hawley, C.C. Hawley Resource Group

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.