Tom Burns

The Tom Burns is a lead 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: Tom Burns
Secondary: Silver Circle

Commodity

Primary: Lead
Secondary: Zinc
Secondary: Gold
Secondary: Silver
Secondary: Copper
Secondary: Barium-Barite

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: Diorite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Permian

Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Late Permian

Analytical Data

Not available

Materials

Ore: Barite
Ore: Chalcopyrite
Ore: Galena
Ore: Gold
Ore: Sphalerite
Ore: Tetrahedrite
Gangue: Quartz

Comments

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

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

Comment (Reference): Primary Reference = Thorne, 1946

Comment (Workings): Workings / Exploration = Caved open cuts.

Comment (Geology): Geologic Description = The Tom Burns prospect is near the west contact of the Pennsylvanian to Permian, Ahtell Creek intrusive which here is quartz monzonite. Based on float and prospect pits, the Tom Burns vein strikes northwest and dips northeasterly. The vein varies from about 2 to 8 feet wide and consists mostly of quartz. Sulfides, predominantly galena with minor chalcopyrite and tetrahedrite, form bands on the walls of vein as much as one foot wide. A sample cut from the westernmost outcrop of the Tom Burns No. 1 claim contains trace amounts of gold and silver, 12.37 percent lead, and 0.22 percent copper. A representative sample of float collected from the Tom Burns No. 2 claim contained 0.01 ounce of gold per ton, a trace of silver and copper. and 7.82 percent lead (Thorne, 1946, fig. 3 and p. 5-6).? the vein was examined in 1936 by Moffit (1938, p. 46) who reported galena and quartz but exposures were too badly sloughed to determine anything about the vein. Samples of float and of vein material in place contained as much as 0.01 ounce of gold per ton, trace Ag, 12.37% Pb, and 0.22% Cu (Moffit, 1932, 1938). The prospect was reexamined by WGM Inc. in their study of Ahtna Native Corporation lands (WGM, 1978). The WGM geologists reported barite and zinc (sphalerite?) in addition to the minerals previously reported ; the WGM Inc. mapping indicates the strike of the vein is subparallel to the contact of the Ahtell intrusive.

Comment (Exploration): Status = Probably inactive

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

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

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): Moffit, F.H., 1932, The Slana District, upper Copper River region: U.S. Geological Survey Bulletin 824, p. 111-124.

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.

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.

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