1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Unnamed (near McDoel Peak)

Occurrence in Alaska, United States with commodity Gold
Map
XML
JSON
KML
C
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. 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 10000894
MRDS ID A011548
Record type Site
Current site name Unnamed (near McDoel Peak)

Geographic coordinates

Geographic coordinates: -152.18666, 62.02339 (WGS84)
Relative position Reed and others (1978, locality 38) show this occurrence in a tributary to Johnson Creek at about 2700 feet. The locality is approximately 3.5 miles east of McDoel Peak in the southeast quarter of Section 3, T. 22 N., R. 16 W., of the Seward Meridian.

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-5(quadrangle 1:63,360 scale)

Talkeetna SW(quadrangle 1:100,000 scale)

Talkeetna(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

Alteration

  • (Local) The area is underlain by hydrothermally altered Mesozoic graywacke and argillite (Reed and others, 1978). Alteration mineralogy is not specified. However, based on its reported similarity to altered zones at Thunder Creek (TL032, TL058), it is most likely argillic alteration of Mesozoic sedimentary rocks.

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) -152.18666, 62.02339
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Curtin, Karlson, O'Leary, Day, and McDanal (1978) report gold (+30 ppm) in bulk heavy-mineral concentrate samples from stream gravels at this locality. The area is underlain by hydrothermally altered Mesozoic graywacke and argillite (KJs) and one of the small bodies of diorite/granodiorite assigned to the Late Cretaceous (67.4 m.y.) Kichatna plutons (TKk) (Reed and others, 1978; Reed and Nelson, 1980). The creek contains abundant float of vein quartz. Gold was not detected from the quartz material, but Reed and others (1978) report a pan concentrate yielded more than 30 colors of fine gold. They indicate that similar altered zones are observed along Dollar (TL031) and Thunder Creeks (TL032, TL058), at the headwaters of Treasure (TL030), Dutch (TL033) and Bear Creeks (TL017).
  • Age = Pleistocene; gold in sediment samples may have been derived from zones within the KJs that are hydrothermally altered by one of the Late Cretaceous diorite/granodiorite (67.4 m.y.) Kichatna plutons (TKk) mapped by Reed and Nelson (1980).

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Mining district

District name Yentna

Comments on the workings information

  • Workings / Exploration = Reconnaissance mapping (Reed and Nelson, 1980), stream silt and rock sampling (Curtin, Karlson, O'Leary, Day, and McDanal,1978) has been done by the U.S. Geological Survey. Prospecting and sampling was done by prospectors and claim owners in the 1980s. Current claim status is not known.

Reference information

Bibliographic references

  • Deposit

    Curtin, G.C., Karlson, R.C., O'Leary, R.M., Day, G.W., and McDanal, S.K., 1978, Geochemical and generalized geologic map showing the distribution of gold and silver, Talkeetna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-870-E, 2 sheets, scale 1:250,000.

  • 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

    Reed, B.L., and Nelson, S.W., 1980, Geologic map of the Talkeetna quadrangle: U.S. Geological Survey Miscellaneous Investigations Map I-1174, 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.