Unnamed (southwest of Hill 4410)

Prospect in Alaska, United States with commodities Silver, Copper, Lead

Geologic information

Identification information

Deposit ID 10001150
MRDS ID A011845
Record type Site
Current site name Unnamed (southwest of Hill 4410)

Geographic coordinates

Geographic coordinates: -144.04263, 62.75968 (WGS84)
Relative position A swarm of veins occurs about 1/4 mile southwest of hill 4410, between 3,500 to 4,200 feet in elevation. They are in the center of the E1/2, section 2, T. 12 N., R. 7 E., Copper River Meridian. The location of the individual veins is shown by Richter (1966, fig. 5, location 6). The locality was listed as an unnamed prospect by Cobb (1979 [OF 79-1247 p.31]. It is also number 15 of Richter and Matson (1972), and number 14 of MacKevett and Holloway (1977).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Copper Primary
Lead Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Tetrahedrite Ore
Quartz Gangue

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Nearby scientific data

(1) -144.04263, 62.75968

Comments on the geologic information

  • Geologic Description = The prospect consists of a swarm of veins mostly in the contact or border phase of the Pennsylvanian to Permian, Ahtell pluton (Richter, Lanphere and Matson , 1975) near its intrusive contact with the Pennsylvanian to Permian, Tetelna Formation (fig. 2, Richter, 1966). The contact northeast of Ahtell Creek is steep. It strikes east-northeast for about one mile, and is marked by a diabase dike. The contact then turns northerly and flattens abruptly, forming a low-angle contact that places Tetelna Formation rocks above the pluton. The veins strike N20E to N80E; they are discontinuous with irregular dip. The veins are mostly quartz although locally about 50 percent of the veins are galena. Small amounts of chalcopyrite are present and tetrahedrite is found in float fragments of the veins (Richter, 1966, p. 32).
  • Age = Emplaced subseqent to or is related to the border phase of the Pennsylvanian to Permian, Ahtell pluton.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Chistochina

Comments on the workings information

  • Workings / Exploration = The veins were first discovered during geologic mapping by the Alaska Division of Mines and Minerals from 1963 through 1965. The vein swarm was then largely covered by claims after the 1964 announcement of the discovery of the Silver Shield prospect (GU014) nearby.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011845
USGS Alaska Resource Data File ARDF GU015

Bibliographic references

  • Deposit

    Richter, D.H., 1966, Geology of the Slana district on south-central Alaska: Alaska Division of Geological and Geophysical Surveys Geological Report 2l, 36b p., 3 sheets, scale 1:63,360.

  • Deposit

    Richter, D.H., Lanphere, M.A., and Matson, N. A., Jr., 1975, Granite plutonism and metamorphism, Eastern Alaska Range, Alaska: Geological Society of American Bulletin, v. 86, p. 819-820.

  • Deposit

    Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Gulkana quadrangle, Alaska: U.S. Geological Survey Open-File Report 79-1247, 36 p.

  • Deposit

    WGM Inc., 1980, 1979 Summary report of gold potential, Slana District, Ahtna project: WGM Inc., 10 p., 1:63,360-scale map. (Report held by Ahtna Mineral Co., Anchorage, Alaska).

  • 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

    Richter, D.H., and Matson, N.A., Jr., 1972, Metallic mineral resources map of the Gulkana quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-419, 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Richter, 1966

General comments

Subject category Comment text
Deposit Model Name = Polymetallic vein (Cox and Singer, 1986; model 22c)
Deposit Other Comments = Additional information can be obtained from Ahtna Minerals in Anchorage, Alaska.

Reporter information

Type Date Name Affiliation Comment
Reporter 20-DEC-00 W.T. Ellis Alaska Earth Sciences
Reporter 20-DEC-00 Hawley, C.C. Hawley Resource Group
Reporter 20-DEC-00 W.J. Nokleberg U.S. Geological Survey