Miss Molly

The Miss Molly is a molybdenum, lead, and zinc 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: Miss Molly

Commodity

Primary: Molybdenum
Primary: Lead
Primary: Zinc
Secondary: Fluorine-Fluorite

Location

State: Alaska
District: Yentna

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

Not available

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Quartz, sericite, clay, alunite? (Fernette and Cleveland, 1984).

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Galena
Ore: Molybdenite
Ore: Pyrite
Ore: Sphalerite
Gangue: Quartz
Gangue: Fluorite

Comments

Comment (Geology): Geologic Description = Fernette and Cleveland (1984) described the mineralization at Miss Molly as quartz veins with medium to coarse-grained molybdenite, pyrite, and local fluorite. Veins are regularly spaced, sub parallel, vary from 2 to 10 cm wide, and are spaced 2 to 10 m apart. Veins occur in two zones about 545 m long and up to 150 m wide in a leucocratic, equigranular biotite granite stock. Veins locally fill joints and less commonly shears. Hydrothermal alteration up to 0.3 m wide to sericite and pyrite, occurs adjacent to veins. Grab and chip samples contain up to 0.38% Mo, 0.16% Zn and 100 ppb Au. The granite stock intrudes Mesozoic marine sediments (KJs) of the Kahlitna terrane (Fernette and Cleveland, 1984 and Nokleberg and others, 1987). Reed and Lanphere (1972) report nearby granitic plutons with K-Ar ages of 56-59 m.y. and is probably the same age as the intrusion hosting the veins.

Comment (Exploration): Status = Probably inactive

Comment (Geology): Age = Possibly related to dated Tertiary (59 - 56 m.y.) intrusions nearby. (Reed and Lanphere, 1972)

Comment (Workings): Workings / Exploration = Exploration work included prospecting, rock chip geochemical sampling.

Comment (Reference): Primary Reference = Fernette and Cleveland, 1984

Comment (Deposit): Other Comments = the Miss Molly prospect is not a classic stockwork molybdenum- type occurrence.

Comment (Deposit): Model Name = Mo-bearing quartz veins

Comment (Reserve-Resource): Reserves = Moderate size and grade (Fernette and Cleveland, 1984).

References

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): Fernette, Gregory, and Cleveland, Gaylord, 1984, Geology of the Miss Molly molybdenum prospect, Tyonek C-6 quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Professional Report 86, p. 35-41.

Reference (Deposit): Nokleberg, W.J., Bundtzen, T.K., Berg, H.C., Brew, D.A., Grybeck, D.J., Robinson, M.S., Smith, T.E., and Yeend, W., 1987, Significant metalliferous lode deposits and placer districts of Alaska: U.S. Geological Survey Bulletin 1786, 104 p.

Reference (Deposit): Hollister, V.F., 1978, Geology of the porphyry copper deposits of the Western Hemisphere; New York, Society of Mining Engineering, American Institute of Mining, Metallurgy, and Petroleum Engineers Incorporated, 218 p.

Reference (Deposit): U.S. Bureau of Mines, 1998, Minerals Availability System/Minerals Industry Location System (MAS/MILS), Talkeetna Quadrangle: Worldwide Web URL http://imcg.wr.usgs.gov/data.html.
URL: http://imcg.wr.usgs.gov/data.html.

Reference (Deposit): Reed, B.L., and Lanphere, M.A., 1972, Generalized geologic map of the Alaska-Aleutian range batholith showing potassium-argon ages of the plutonic rocks: U.S. Geological Survey Miscellaneous Field Studies Map MF-372, 2 sheets, scale 1:1,000,000.

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.

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