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Unnamed (Omilak Creek)

Prospect in Alaska, United States with commodities Silver, Lead, 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. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10001916
MRDS ID A012748
Record type Site
Current site name Unnamed (Omilak Creek)

Geographic coordinates

Geographic coordinates: -162.53329, 65.03936 (WGS84)
Relative position This prospect is 1.6 miles N 36 E of the Foster prospect (BN098). The Foster prospect is in the headwaters of a north tributary of Omilak Creek at an elevation of approximately 1,250 feet. Omilak Creek flows westward from headwaters in the northern Darby Mountains to the Fish River in McCarthy's Marsh.

Site location context

Political divisions (FIPS codes)

Nome(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Bendeleben A-2(quadrangle 1:63,360 scale)

Bendeleben SE(quadrangle 1:100,000 scale)

Bendeleben(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Norton Bay(hydrologic unit)

Norton Sound(hydrologic accounting unit)

Northwest(hydrologic subregion)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Lead Primary
Zinc Critical Primary

Comments on the commodity information

  • Ore Material = secondary lead minerals

Materials information

Materials Type of material
Galena Ore

Alteration

  • (Local) Oxidation of sulfide minerals.

Mineral occurrence model information

Model code 72
USGS model code 19a
Deposit model name Polymetallic replacement
Mark3 model number 47
Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -162.53329, 65.03936
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Oxidized galena in soil and gossan material occurs with ubiquitous fragments of black phyllite in a prospect trench (Briskey, 1983). This is within a northwest-trending zone of iron-oxide staining that is traceable at the surface for 800 feet. Assays of 24 samples of material in the prospect trench contained 20 ppm to 6.8 % Pb, 25 ppm to 3.4 % Zn, 10 to 2,200 ppm Cu, and 0.2 to 1,850 ppm Ag. The average of these samples was 0.84 % Pb, 0.37 % Zn, 221 ppm Cu, and 320 ppm Ag. This mineralization is localized near the axis and along the west limb of a large northwest plunging syncline in high grade metasedimentary rocks (Till and others, 1986).
  • Age = Cretaceous ; Epigenetic mineralization in metamorphic rocks of Seward Peninsula is primarily of Cretaceous age.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Council

Comments on the workings information

  • Workings / Exploration = A small surface prospect trench is present here.

Reference information

Bibliographic references

  • Deposit

    Briskey, J.A., 1983, Summary of field observations on Seward Peninsula mineral deposits: U.S. Geological Survey, unpublished administrative report, 34 p.

  • Deposit

    Till, A.B., Dumoulin, J.A., Gamble, B. ., Kaufman, D.S., and Carroll, P.I., 1986, Preliminary geologic map and fossil data, Soloman, Bendeleben, and southern Kotzebue quadrangles, Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 86-276, 10 p., 3 plates, scale 1:250,000.

Comments on the references

  • Primary Reference = Briskey, 1983

General comments

Subject category Comment text
Deposit Model Name = Polymetallic vein or replacement in marble (Cox and Singer, 1986; model 19a or 22c ?). May be similar to Foster propect (BN098).
Deposit Model Number = 19a ?; 22c ?

Reporter information

Type Date Name Affiliation Comment
Reporter 15-MAR-1999 Travis L. Hudson Applied Geology

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.