Mills & Trimble

Prospect in Alaska, United States with commodities Silver, Gold, Copper, Nickel

Geologic information

Identification information

Deposit ID 10000469
MRDS ID A010647
Record type Site
Current site name Mills & Trimble
Related records 10282424

Geographic coordinates

Geographic coordinates: -151.56253, 59.25946 (WGS84)
Relative position The prospect is located in the northern one-half of section 1, T. 11 S., R. 14 W., of the Seward Meridian, about one mile west of Mt. Mills and about 1.5 miles north of the end of the Rocky River road that runs from Seldovia to Windy Bay. This location is accurate to within half a mile. This is Cobb's (1972, MF-397) location 3.
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Geographic areas

Country State
United States Alaska


Commodity Importance
Silver Primary
Gold Primary
Copper Secondary
Nickel Secondary

Materials information

Materials Type of material
Arsenopyrite Ore
Chalcopyrite Ore
Gold Ore
Pyrite Ore
Calcite Gangue
Quartz Gangue


  • (Local) Alteration or oxidation of dike rock related to a possible shear zone.

Mineral occurrence model information

Model code 273
USGS model code 36a
Deposit model name Low-sulfide Au-quartz vein
Mark3 model number 27

Host and associated rocks

  • Host or associated Host
    Stratigraphic age (youngest) Cretaceous

Nearby scientific data

(1) -151.56253, 59.25946

Comments on the geologic information

  • Geologic Description = The bedrock around Mt. Mills is Cretaceous Valdez Group metasediments and greenstone that is cut by felsic dikes of probable Tertiary age (Cobb, 1979, OFR 80-87). The prospect consists of a zone 30 to 50 feet wide, composed of reddish, decaying dike rock which contains some thin quartz veins; it has been fractured by post-veining movement. The zone has a general north-south trend and dips 60 to 70W. The quartz veins are less than a foot wide and contain arsenopyrite, pyrite, and chalcopyrite. Several small adits have been made in this zone but no assay results are reported (Martin and others, 1915).
  • Age = Younger than Cretaceous host rocks.
  • Age = Host rock is Cretaceous.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Homer

Comments on the workings information

  • Workings / Exploration = Several small adits were driven in the early 1900's. No assay results are reported (Martin and others, 1915).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A010647
USGS Alaska Resource Data File ARDF SV011

Bibliographic references

  • Deposit

    Martin G.C., Johnson, B.L., and Grant, U.S., 1915, Geology and mineral resources of Kenai Peninsula, Alaska: U.S. Geological Survey Bulletin 587, 243 p.

  • Deposit

    Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p.

  • Deposit

    Cobb, E.H., 1972, Metallic minerals resources map of the Seldovia quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-397, 1 sheet, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1979, Summary of references to mineral occurrences (other than minerals fuels and construction materials) in the Seldovia quadrangle, Alaska: U.S. Geological Survey Open-file Report 80-87, 47 p.

  • 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.

  • Deposit

    Grant, U.S., and Higgins, D.F., Jr., 1910, Preliminary report on the mineral resources of the southern part of Kenai Peninsula: U.S. Geological Survey Bulletin 442-D, p. 166-178.

Comments on the references

  • Primary Reference = Martin and others, 1915

General comments

Subject category Comment text
Deposit Model Name = Low-sulfide, Au-quartz vein (Cox and Singer, 1986; model 36a)

Reporter information

Type Date Name Affiliation Comment
Reporter 04-MAR-1999 Jeff A. Huber U.S. Geological Survey