Neversweat

The Neversweat is a lead and copper mine located in Alaska.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

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Site Name

Primary: Neversweat
Secondary: Conkle

Commodity

Primary: Lead
Primary: Copper
Secondary: Gold
Secondary: Silver

Location

State: Alaska
District: Chistochina

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:

Physiography

Not available

Mineral Deposit Model

Model Name: Polymetallic veins

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Permian

Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock
Age Young: Late Permian

Analytical Data

Not available

Materials

Ore: Chalcopyrite
Ore: Chrysocolla
Ore: Galena
Ore: Malachite
Ore: Pyrite
Gangue: Limonite
Gangue: Quartz

Comments

Comment (Geology): Age = Emplaced subseqent to or is related to the border phase of the Pennsylvanian to Permian, Ahtell pluton.

Comment (Exploration): Status = Inactive

Comment (Deposit): Model Name = Polymetallic vein (Cox and Singer, 1986; model 22c)

Comment (Deposit): Other Comments = Additional information can be obtained from Ahtna Minerals in Anchorage, Alaska.

Comment (Reference): Primary Reference = Thorne, 1946 and Richter, 1966

Comment (Workings): 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.

Comment (Geology): 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.

References

Reference (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.

Reference (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.

Reference (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.

Reference (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.

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

Reference (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.

Reference (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.

Reference (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.

Reference (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.

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