1. Mineral Resources
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  3. Mineral Resource Data System (MRDS)

Unnamed (on the Kichatna River)

Prospect 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. 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 10309031
MRDS ID A011550
Record type Site
Current site name Unnamed (on the Kichatna River)
Related records 10136557, 10000896

Geographic coordinates

Geographic coordinates: -151.75178, 62.15252 (WGS84)
Relative position Clark and Cobb (1972, locality 11) locate this placer prospect at the confluence of the Nakochna River and the Kichatna River in the southeast quarter of Section 24, T. 24 N., R. 14 W., of the Seward Meridian. Reed and others (1978) show this prospect as locality 39.

Site location context

Political divisions (FIPS codes)

Matanuska-Susitna(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Talkeetna A-4(quadrangle 1:63,360 scale)

Talkeetna SW(quadrangle 1:100,000 scale)

Talkeetna C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Yentna River(hydrologic unit)

Susitna River(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Platinum 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) -151.75178, 62.15252
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Reed and others (1978) describe this site as an old placer prospect on river bars, chiefly for platinum. There is no evidence that the 1917 dredging operation at this site was productive. Cobb and Reed (1980) report some fine gold was recovered from the Nakochna River. No other published data are available. The sources of platinum may be the ultramafic rocks of the composite plutons (Tcp) described by Reed and Nelson (1980) that extend from Mt. Estelle in the Tyonek quadrangle to the headwaters of Cascade Creek. Anomalous gold, platinum-group elements, copper, chrome, nickel and arsenic are reported from the composite plutons (Reed and others, 1978; Reed and Nelson, 1980; Nelson and others, 1992). Gold and platinum group element placers have been worked at sites downstream from these bodies (Mertie, 1919; Cobb, 1973). Also see TL020, TL023, TL052, and TL05.
  • Age = Pleistocene.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Mining district

District name Yentna

Comments on the workings information

  • Workings / Exploration = According to Reed and others (1978) this was a former dredge site.

Reference information

Bibliographic references

  • Deposit

    Capps, S.R., 1913, The Yentna district, Alaska: U.S. Geological Survey Bulletin 534, 75 p.

  • Deposit

    Martin, G.C., 1919, Alaska Mining Industry in 1917: U.S. Geological Survey Bulletin 692, p. 11-42

  • Deposit

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

  • Deposit

    Hawley, C.C., and Clark, A.L., 1973, Geology and mineral deposits of the upper Chulitna district, Alaska: U.S. Geological Survey Professional Paper 758-A, p. 1-10, 2 sheets, scale 1:250,000 and 1:500,000.

  • Deposit

    Reed, B.L., Nelson, S.W., Curtin, G.C., and Singer, D.A., 1978, Mineral resources map of the Talkeetna Quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-870-D, 1 sheet, scale 1:250,000.

  • Deposit

    Cobb, E.H., and Reed, B.L., 1980, Summaries of data and lists of reference to metallic and selected nonmetallic mineral deposits in the Talkeetna quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-884, 106 p.

  • Deposit

    Clark, A.L., and Cobb, E.H., 1972, Metallic mineral resources map of the Talkeetna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-369, 1 sheet, scale 1:250,000.

  • Deposit

    MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.

Comments on the references

  • Primary Reference = Reed and others, 1978

General comments

Subject category Comment text
Deposit Model Name = Placer Au-PGE (Cox and Singer, 1986; model 39a).

Reporter information

Type Date Name Affiliation Comment
Reporter 10-AUG-1998 Madelyn A. Millholland Millholland & Associates

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.