Flat Creek

Past Producer in Alaska, United States with commodities Gold, Silver, 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. 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 10101008
MRDS ID A015072
Record type Site
Current site name Flat Creek
Alternate or previous names Flat Creek and Marietta Basin, Marietta

Geographic coordinates

Geographic coordinates: -158.00876, 62.40217 (WGS84)
Relative position SEE LOCATION COMMENTS

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

Comments on the location information

  • 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.

Commodities

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

Materials information

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

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Monzonite
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Unconsolidated Deposit > Gravel
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Argillite
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone

Nearby scientific data

(1) -158.00876, 62.40217

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1910
Year of last production 1956

Comments on exploration

  • Status = Inactive

Mining district

District name Iditarod

Comments on the production information

  • MINED BY DREDGE 1915-56; FURTHER MINING 1970-86. RECORDED PRODUCTION IS 477,039 OZ. AU; CONSIDERED MINIMUM ESTIMATE.

Comments on the workings information

  • SURFACE; EXTENSIVE DREDGING; ACTIVELY MINED DURING 1995.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit 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.
Deposit LOWER 4 MI. OF VALLEY HAS GRADIENT OF ABOUT 100 FT./MILE; UPPERMOST MILE OF VALLEY DROPS APPROXIMATELY 1000 FT.
Deposit THIS SITE NAME WAS CREATED BY THE REPORTER OR OTHER USGS EMPLOYEE BASED ON PROXIMITY TO SOME MAJOR GEOGRAPHIC FEATURE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-1987 Powers, M.T. (Huber, D.F.) U.S. Geological Survey ARDF AND MRDS MERGED RECORD
Updater 01-MAY-1994 Powers, M.T. (Huber, D.F.) U.S. Geological Survey
Editor 06-MAR-1998 Mason, George 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.