Flat Creek

Past Producer in Alaska, United States with commodities Gold, Mercury, Antimony, Tungsten
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 10308875
MRDS ID A015072
Record type Site
Current site name Flat Creek
Alternate or previous names Flat Creek and Marietta Basin, Marietta
Related records 10101008

Geographic coordinates

Geographic coordinates: -158.00893, 62.40239 (WGS84)
Relative position USGS MF-363 loc. 30.(B-4,5 topographic map). Tailings marked on Iditarod (B-4,5) topographic maps. Coordinates given here are for mine at head of Flat Creek.; 0-5 Miles south of Flat.; Accurate within 1/4 mile.

Site location context

Political divisions (FIPS codes)

Yukon-Koyukuk(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Iditarod B-5(quadrangle 1:63,360 scale)

Iditarod SW(quadrangle 1:100,000 scale)

Iditarod(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Federal lands

BLM(Federal land areas administered by BLM)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Mercury Secondary
Antimony Critical Secondary
Tungsten Critical Secondary

Comments on the commodity information

  • Gangue = Concentrates contain arsenopyrite.

Materials information

Materials Type of material
Cinnabar Ore
Gold Ore
Scheelite Ore
Stibnite Ore

Mineral occurrence model information

Model code 119
USGS model code 39a
Deposit model name Placer Au-PGE
Mark3 model number 54

Nearby scientific data

(1) -158.00893, 62.40239

Economic information

Comments on the geologic information

  • Geologic Description = Deeply weathered monzonite stock at head of Flat Creek constitutes a residual placer, which grades downstream into alluvial placers and then into bench and stream placers. Best pay is 3-4 mi. above mouth. Gold from benches is coarser and higher grade than gold from creek gravel. Mertie (1936) reported average fineness of 878 parts Au and 114 parts Ag.
  • Age = Tertiary/Quaternary

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Iditarod

Comments on the production information

  • Production Notes = Mined by dredge 1915-56; further mining 1970-86. Recorded production is 477,039 oz. Au; considered minimum estimate.

Comments on the workings information

  • Workings / Exploration = Surface; extensive dredging; actively mined during 1994.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Bundtzen and others, 1992

General comments

Subject category Comment text
Deposit Model Name = placer: residual, eluvial, stream, bench
Deposit Other Comments = Lower 4 mi. of valley has gradient of about 100 ft./mile; Uppermost mile of valley drops approximately 1000 ft.

Reporter information

Type Date Name Affiliation Comment
Reporter 25-MAY-1994 Powers, M.T.; Huber, D.F.; Miller, M.L. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.