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  3. Mineral Resource Data System (MRDS)

Sevenmile Beach

Past Producer in Alaska, United States with commodity Gold
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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. Host and associated rocks
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10097513
MRDS ID A012462
Record type Site
Current site name Sevenmile Beach
Related records 10160925

Geographic coordinates

Geographic coordinates: -154.12247, 57.64939 (WGS84)
Relative position This site is a beach located between VABM Rocky Point on the west and Uyak Bay on the east, a distance of approximately 4 1/2 miles (Cobb, 1972, MF 459, locality 4; Cobb, 1973, Bulletin 1374, figure 11, locality 3; MacKevett and Holloway, 1977, locality 4).

Site location context

Political divisions (FIPS codes)

Kodiak Island(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Karluk C-1(quadrangle 1:63,360 scale)

Kodiak NW(quadrangle 1:100,000 scale)

Karluk(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Kodiak-Afognak Islands(hydrologic unit)

Kodiak-Shelikof(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Kodiak National Wildlife Refuge(National Wildlife Refuge)

National Wildlife Refuge FWS(Type of land area)

FWS(Federal land areas administered by FWS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore

Mineral occurrence model information

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

Host and associated rocks

  • Host or associated Host
    Rock type Unconsolidated Deposit > Sand and Gravel
    Stratigraphic age (youngest) Holocene
    Stratigraphic age (youngest) Holocene

Nearby scientific data

(1) -154.12247, 57.64939
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Brooks (1912) first reported that a new beach placer had been found near Uyak in the summer of 1911. This is a broad sand and gravel beach, behind which are 60-foot bluffs of glacial gravel and till. Most of the gold was obtained over a distance of 3 3/4 miles, where the best pay occurred near the base of the bluffs on a clay layer which lay 1 to 6 feet below the surface. The pay streak was 12 to 16 inches thick and contained some nuggets valued up to $0.25 (gold price at $20.67). Sluice boxes and rockers were used in the mining and it was said that a person could recover up to $10 worth of gold per day. By 1912 the paystreak was apparently worked out. The immediate source of the gold is thought to be the glacial material eroded from the bluffs. Brooks (1918) reported that a sample collected here contained no detectable platinum.
  • Age = Quaternary

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Kodiak

Comments on the workings information

  • Workings / Exploration = The beach deposit was mined by portable sluice boxes and rockers with most of the production taking place in 1911 and 1912.

Reference information

Bibliographic references

  • Deposit

    Martin, G.C., 1913, Mineral deposits of Kodiak and neighboring islands, in Brooks, A.H., and others, Mineral resources of Alaska, 1912: U.S. Geological Survey Bulletin 542, p. 125-136.

  • Deposit

    Capps, S.R., 1937, Kodiak and adjacent islands, Alaska, in Smith, P.S. and others, Mineral resources of Alaska, 1934: U.S. Geological Survey Bulletin 880, p. 111-184, 1 map sheet, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1973, Placer deposits of Alaska: U.S. Geological Survey Bulletin 1374, 213 p.

  • Deposit

    Brooks, A.H., 1912, The mining industry in 1911, in Brooks, A.H., and others, Mineral resources of Alaska, report on progress of investigations in 1911: U.S. Geological Survey Bulletin 520-A, p. 17-44.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Karluk quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-459, 1 sheet, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Afognak, Karluk, Kodiak, and Trinity Islands quadrangles, Alaska: U.S. Geological Survey Open-File Report 79-860, 49 p.

  • Deposit

    MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.

  • Deposit

    Maddren, A.G., 1919, The beach placers of the west coast of Kodiak Island, Alaska, in Martin, G.C., and others, Mineral resources of Alaska, 1917: U.S. Geological Survey Bulletin 692-E, p. 299-319.

Comments on the references

  • Primary Reference = Martin, 1913

General comments

Subject category Comment text
Deposit Model Name = Gold placer (Cox and Singer, 1986; model 39a).

Reporter information

Type Date Name Affiliation Comment
Reporter 08-SEP-1998 S.H. Pilcher U.S. Geological Survey

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.