Yellow Pup

The Yellow Pup is a tungsten 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: Yellow Pup

Commodity

Primary: Tungsten

Location

State: Alaska
District: Fairbanks

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

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

Physiography

Not available

Mineral Deposit Model

Model Name: W skarn

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Scheelite
Gangue: Apatite
Gangue: Diopside
Gangue: Garnet
Gangue: Hornblende

Comments

Comment (Exploration): Status = Inactive

Comment (Reference): Primary Reference = Robinson, 1981

Comment (Geology): Geologic Description = The following description of the Yellow Pup tungsten deposit is summarized from Robinson (1981). The rocks consist of a hornfelsed sequence of feldspar-quartz schist, biotite-muscovite-quartz schist, muscovite-quartz schist, calc-amphibolite, and marble. The tungsten-bearing beds occur in pelitic schists and quartzite that contain resorbed biotite and andalusite prophyroblasts that reflect hornfelsing caused by the intrusion of the nearby Gilmore Dome stock. The tungsten-bearing rocks are marble, calc-amphibolites, and siliceous calc-silicate rocks. These rocks form distinctive layers within a package of rocks dominated by barren mica schist, quartz schist, and quartzite. Two types of calc-amphibolites are present. The most common is epidote amphibolite, which has sporadic concentrations of scheelite and powellite. The other calc-amphibolite occurs in a 2-meter-thick layer in the main open cut and consists of hornblende, quartz, tremolite, muscovite, epidote clinozoisite, garnet, plagioclase, and chlorite. There may be as much as 10 percent scheelite in this amphibolite. In the mine, the mineralized zone is arched into a small, north-plunging, assymetrical antiform that flattens to the south where it is truncated by a high-angle fault. Most mineralization appears to be within the eastern limb of the structure. Other scheelite occurrences are present in epidote-amphibolite layers in surface trenches; the size of these zones varies, but none appear to be as large or as high grade as the calc-amphibolite zone.

Comment (Workings): Workings / Exploration = An adit was driven 12 feet soon after the discovery of the deposit in 1942 (Thorne and others, 1948, p. 8-9). In 1981, the workings consisted of several open cuts and trenches over an area approximately 1,000 feet long by 300 feet wide (Robinson, 1981).

Comment (Production): Production Notes = After its discovery in 1942, 35 tons of ore from the tunnel were stockpiled (Thorne and others, 1948, p. 8-9). In the late 1970's, several tons of high-grade tungsten concentrates were shipped, and a large amount of unmilled ore was stockpiled (Robinson, 1981, p. 1). In 1981, Vincent Monzuella produced a few tons of scheelite concentrate and stockpiled a larger amount of high-grade, unmilled ore (Bundtzen and others, 1982, p. 27).

Comment (Deposit): Model Name = W skarn deposit (Cox and Singer, 1986; model 14a)

References

Reference (Deposit): Thorne, R.L., Muir, N.M., Erickson, A.W., Thomas, B. I., Hedie, H. E., and Wright, W. S., 1948, Tungsten deposits of Alaska: U.S. Bureau of Mines Report of Investigation 4174, 51 p.

Reference (Deposit): Robinson, M.S., 1981, Surface geology and ground magnetics of the Yellow Pup tungsten deposit, Gilmore Dome, Fairbanks mining district, Alaska: Alaska Division of Geological and Geophysical Surveys Open-File Report 137, 9 p., 1 sheet, scale 1:1200.

Reference (Deposit): Bundtzen, T.K., Robinson, M.S., Kline, J.T., and Albanese, M.D., 1982, Geology of the Clipper gold mine, Fairbanks mining district, Alaska: Alaska Division of Geological and Geophysical Surveys Open-File Report 157, 13 p., 1 sheet, scale 1:120.

Reference (Deposit): Bain, H. F., 1946, Alaska's minerals as a basis for industry: U.S. Bureau of Mines Information Circular 7379, 89 p.

Reference (Deposit): Cobb, E.H., 1975, Mineral resources of Alaska, in Yount, M.E., ed., U.S. Geological Survey Alaska Program, 1975: U.S. Geological Survey Circular 722, p. 37.

Reference (Deposit): Byers, F.M., Jr., 1957, Tungsten deposits in the Fairbanks district, Alaska: U.S. Geological Survey Bulletin 1024-I, p. 179-216.

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

Reference (Deposit): Chapman, R.M., and Foster, R.L., 1969, Lode mines and prospects in the Fairbanks district, Alaska: U.S. Geological Survey Professional Paper 625-D, 25 p., 1 plate.

Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Fairbanks quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-410, 1 sheet, scale 1:250,000.

Reference (Deposit): Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Fairbanks quadrangle, Alaska: U.S. Geological Survey Open-File Report 76-662, 174 p.

Reference (Deposit): Thorne, R.L., Muir, N.M., Erickson, A.W., Thomas, B. I., Hedie, H. E., and Wright, W. S., 1948, Tungsten deposits of Alaska: U.S. Bureau of Mines Report of Investigation 4174, 22 p.

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