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

Geologic information

Identification information

Deposit ID 10001147
MRDS ID A011841
Record type Site
Current site name Neversweat
Alternate or previous names Conkle
Related records 10113049

Geographic coordinates

Geographic coordinates: -144.10263, 62.81968 (WGS84)
Relative position The Neversweat prospect is on the north side of the West Fork of Ahtell Creek about 1.2 miles above its junction with Ahtell Creek. The coordinates are about midway between the two prospects shown by Richter (fig. 5, 1966, no. 2) and is accurate within 500 feet. The prospect is locality 8 of both Richter and Matson (1972) and MacKevett and Holloway (1977). It is in the SE1/4NE1/4,section 16, T. 12N., R. 7 E., Copper River Meridian.
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Geographic areas

Country State
United States Alaska


Commodity Importance
Copper Primary
Lead Primary
Silver Secondary
Gold Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Chrysocolla Ore
Galena Ore
Malachite Ore
Pyrite Ore
Limonite Gangue
Quartz Gangue

Mineral occurrence model information

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

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Rock unit name Ahtell Pluton
    Rock description Ahtell Pluton
    Stratigraphic age (youngest) Late Permian
    Stratigraphic age (youngest) Late Permian
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite

Nearby scientific data

(1) -144.10263, 62.81968

Comments on the geologic information

  • Geologic Description = The prospect is in quartz monzonite of the Grubstake phase of the Pennsylvanian to Permian, Ahtell pluton (Richter, 1966, fig. 2; Richter, Lanphere, and Matson, 1975; Beard and Barker, 1989). About 0.1 miles east of the prospect, the quartz monzonite abuts the Pennsylvanian to Permian, Tetelna Formation along a northwest fault.? the prospect consists of polymetallic quartz veins that contain a few percent of galena and lesser amounts of chalcopyrite. The primary minerals are in part oxidized to malachite, chrysocolla, and limonite in underground exposures (Thorne, 1946, p. 7). The prospect was active when visited by Thorne in 1945 who noted that the ground was extensively brush covered. In the main upper adit of the westernmost occurrence, the deposit is a 6-foot thick shear zone that contains three mineralized quartz veins that strike N15E and dip 70W. A representative 42-inch sample cut on the sill (floor) of the adit near the face contained 0.01 ounce of gold per ton, a trace of silver, 6.58 percent lead, and 0.19 percent copper. A shallow adit, apparently on the same structure, 300 feet south of the upper adit, contains a narrow vein with galena and chalcopyrite. Richter (1966, p. 30) reports a two-foot-wide vein that is 300 feet east of the lower adit; it contains small amounts of pyrite and chalcopyrite.
  • 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 prospect was discovered and explored before 1925 (Moffit, 1938, p. 46-47; 1954). It was restaked as the Neversweat claims in 1943 (Thorne, 1946) and was actively prospected by its owners in 1945 when visited by Thorne. The prospect was subsequently restaked by Sam Gamblin (Richter, 1966, p. 30) who reported that the prospect was also known as the Conkle lead prospect.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011841
USGS Alaska Resource Data File ARDF GU030

Bibliographic references

  • Deposit

    Thorne, R.L., 1946, Exploration of argentiferous lead-copper deposits of the Slana district, Alaska: U.S. Bureau of Mines Report of Investigations 3940, 9 p.

  • Deposit

    Moffit, F.H., 1954, Geology of the eastern part of the Alaska Range and adjacent area: U.S. Geological Survey Bulletin 989-D, p. 63-218.

  • 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

    Beard, J.A., and Barker, Fred, 1989, Petrology and tectonic significance of gabbro, tonalites, shoshonites, and anorthosites in a late Paleozoic arc-root complex in the Wrangellia terrane, Southern Alaska: Journal of Geology, v. 97, p. 667-683.

  • 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

    Moffit, F.H., 1938, Geology of the Slana-Tok district, Alaska: U.S. Geological Survey Bulletin 904, 54 p.

  • 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 = Thorne, 1946 and 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 04-DEC-00 W.T. Ellis Alaska Earth Sciences
Reporter 04-DEC-00 Hawley, C.C. Hawley Resource Group
Reporter 04-DEC-00 W.J. Nokleberg U.S. Geological Survey