Von Frank - North

The Von Frank - North is a arsenic and antimony 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: Von Frank - North

Commodity

Primary: Arsenic
Primary: Antimony
Secondary: Cobalt
Secondary: Gold

Location

State: Alaska
District: McGrath

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
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

Alteration Type: L
Alteration Text: Sericite-quartz-ankerite in intrusion.

Rocks

Role: Associated
Age Type: Associated Rock
Age in Years: 70.000000+-
Age Young: Late Cretaceous

Analytical Data

Not available

Materials

Ore: Pyrite
Ore: Arsenopyrite
Gangue: Quartz

Comments

Comment (Exploration): Status = Inactive

Comment (Geology): Age = Chronological age is for Von Frank Mountain.

Comment (Workings): Workings / Exploration = In 1991, Central Alaska Gold Company began a sampling program and encountered auriferous mineralization in a border phase of the Von Frank Mountain intrusion (DiMarchi and others, 1994). In 1992, Clautice and others (1993) collected grab samples of intrusive-hosted mineralization, which contained up to 78 ppb gold, 192 ppm antimony, and 100 ppm cobalt.

Comment (Geology): Age = the age of mineralization is Late Cretaceous, based on inferred age of 70.0 Ma Von Frank Mountain pluton (Moll and others, 1981).

Comment (Reference): Primary Reference = Clautice and others, 1993

Comment (Deposit): Other Comments = See Von Frank - South prospect (MD036). The Von Frank - North occurrence is on lands selected or owned by Doyon Ltd. For further information, contact Doyon Ltd. at 210 1st Ave, Fairbanks, Alaska 99701.

Comment (Geology): Geologic Description = Thin stockwork-type arsenopyrite-pyrite veins developed in granodiorite at the west side of Von Frank Mountain intrusion. No dimensions or aerial extent are given (Clautice and others, 1993; DiMarchi and others, 1994) the age of mineralization is Late Cretaceous, based on inferred age of 70.0 Ma Von Frank Mountain pluton (Patton and others, 1980; Moll and others, 1981). In 1992, Clautice and others (1993) collected grab samples of intrusive-hosted mineralization, which contained up to 78 ppb gold, 192 ppm antimony, and 100 ppm cobalt.

Comment (Deposit): Model Name = Polymetallic vein (Cox and Singer, 1986; model no. 22c)

References

Reference (Deposit): DiMarchi, J.J., Weglarz, T.B., Adams, D.D., Huber, J., and West, A.W., 1994, Annual Report for 1993--Doyon Option Lands, Volume 1: ASA Inc. Report, 187 p. (Report held by Doyon Ltd., Fairbanks, Alaska.)

Reference (Deposit): Moll, E.J., Silberman, M.L., and Patton, W.W. Jr., 1981, Chemistry, mineralogy, and K-Ar ages of igneous and metamorphic rocks of the Medfra quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-811C, 15 p., 2 sheets, scale 1:250,000.

Reference (Deposit): Clautice, K.H., Bowman, N.D., Clough, J.G., Gilbert, W.G., Kline, J.T., Smith, T.E., and Blodgett, R.B., 1993, Land selection Unit 8 (Kantishna River, Ruby, and Medfra quadrangles): References, lead isotope, geochemical and major oxide data: Alaska Division of Geological and Geophysical Surveys, 42 p., 1 sheet, scale 1:250,000.

Reference (Deposit): Patton, W.W., Jr., Moll, E.J., Dutro, J.T., Jr., Silberman, M.L., and Chapman, R.M., 1980, Preliminary geologic map of Medfra quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-811-A, 1 sheet, scale l:250,000.

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