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Little Bird

Prospect in Alaska, United States with commodities Silver, Copper, Zinc, Lead, Tungsten
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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 10307856
Record type Site
Current site name Little Bird

Geographic coordinates

Geographic coordinates: -153.79484, 62.36848 (WGS84)
Relative position The Little Bird prospect is on an east-facing slope on the west side of Sheep Creek Valley at an elevation of about 3,600 feet (1,097 m) in the SE1/4 sec. 6, T. 26 N., R. 24 W., of the Seward Meridian. The Little Bird prospect is 3.5 kilometers (2.2 miles) north of the Dahl prospect. The Little Bird prospect was briefly examined by the reporter in 1982.

Site location context

Political divisions (FIPS codes)

Yukon-Koyukuk(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

McGrath B-2(quadrangle 1:63,360 scale)

McGrath SE(quadrangle 1:100,000 scale)

McGrath(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Kuskokwim River(hydrologic accounting unit)

Southwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Cook Inlet Region, Incorporated(ANCSA Region)

ANCSA Region NTVPIC(Type of land area)

NTVPIC(Federal land areas administered by NTVPIC)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Copper Primary
Zinc Critical Primary
Lead Secondary
Tungsten Critical Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Pyrrhotite Ore
Scheelite Ore
Sphalerite Ore
Diopside Gangue
Epidote Gangue

Mineral occurrence model information

Model code 60
USGS model code 18c
Deposit model name Skarn Zn-Pb
Mark3 model number 22

Nearby scientific data

(1) -153.79484, 62.36848
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The Little Bird occurrence consists of sulfide-bearing, pyroxene skarn in limestone of the Lower Devonian Barren Ridge Limestone, a unit of the Dillinger subterrane (Bundtzen, Harris, and Gilbert, 1997). The skarns occur near a weakly mineralized granite porphyry stock (Brewer and others, 1992). Discontinuous semi-massive sulfide to disseminated pyrrhotite, chalcopyrite, sphalerite, and galena occur in a 200 meter by 700 meter skarn zone. Grades and widths are quite variable, but up to 4.5 percent copper, 1.7 percent lead, 11.4 percent zinc, 426.1 grams/tonne silver, and 0.33 percent tungsten are found in the sulfide-bearing skarn zone (Brewer and others, 1992). The deposit was explored by Anaconda Minerals Company from 1981-1983. No analytical data is available.

Economic information about the deposit and operations

Development status Prospect

Comments on exploration

  • Status = Inactive

Mining district

District name McGrath

Comments on the workings information

  • Workings / Exploration = The Little Bird occurrence was explored by Anaconda Minerals Company from 1981-1983 (Rob Kell, written communication, 1984). Grades and widths are quite variable, but up to 4.5 percent copper, 1.7 percent lead, 11.4 percent zinc, 426.1 grams/tonne silver, and 0.33 percent tungsten occur in the sulfide bearing skarns (Brewer and others, 1992).

Reference information

Comments on the references

  • Primary Reference = Brewer and others 1992

General comments

Subject category Comment text
Deposit Model Name = Polymetallic lead-zinc skarn (Cox and Singer, 1986; model 18c).

Reporter information

Type Date Name Affiliation Comment
Reporter 05-DEC-98 T.K. Bundtzen Pacific Rim Geological Consulting

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.