Nim

The Nim is a copper, molybdenum, silver, and gold 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

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Nim

Commodity

Primary: Copper
Primary: Molybdenum
Primary: Silver
Primary: Gold
Secondary: Zinc
Secondary: Lead

Location

State: Alaska
District: Valdez Creek

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: Porphyry Cu-Au
Model Name: Polymetallic veins

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Alteration consists of widespread propylitic alteration and silicification. Local zones of potassic alteration marked by secondary biotite reported.

Rocks

Role: Host
Age Type: Associated Rock
Age in Years: 67.500000+-2.500000
Age Young: Late Cretaceous

Analytical Data

Not available

Materials

Ore: Arsenopyrite
Ore: Bornite
Ore: Chalcocite
Ore: Chalcopyrite
Ore: Galena
Ore: Molybdenite
Ore: Pyrite
Ore: Sphalerite
Gangue: Quartz

Comments

Comment (Deposit): Model Name = Polymetallic vein, Au-Ag breccia pipe, or Cu-Au porphyry (Cox and Singer, 1986; models 22c, 20c)

Comment (Geology): Age = Chron age is for the Golden Zone mine.

Comment (Geology): Geologic Description = The country rocks in the area of the Him prospect include Upper Triassic to Upper Jurassic crystal tuff, argillite, chert, graywacke, and limestone, which are intruded successively by hypabyssal garnetiferous diorite porphyry, and by monzonite porphyry and quartz porphyry. The intrusive rocks are correlated with similar Upper Cretaceous plutons at the Golden Zone mine (HE043) (Swainbank and others, 1977). The deposits consists chiefly of pluton-hosted, porphyry-type disseminations of arsenopyrite, bornite, chalcocite, chalcopyrite, and molybdenite in a 4,000- by 4,000-foot area. Selected bedrock samples assay as high as 5% copper, 360 ppm molybdenite, 2 ppm gold and 9 ounces of silver per ton.? In addition to the porphyry-type deposit. mapping and geophysical methods indicate 5 breccia-pipe anomalies similar to those at the Golden Zone mine (Bundtzen and others, 1984). The Nim deposit has a slightly different geochemical signature from the Golden Zone mine (Nim is higher in molybdenum-copper, lower in gold), but its hybrid breccia-porphyry mineralization, small alteration haloes, and complex mineralogy are essentially the same as at the Golden Zone mine.

Comment (Deposit): Model Number = 22c, 20c

Comment (Workings): Workings / Exploration = Exploration in the late 1970's consisted of at least 18 shallow RC drill holes into the Snoopy and Nim areas. IP and magnetic surveys have also been conducted on the property (Bundtzen, 1983).? Selected bedrock samples assay as high as 5% copper, 360 ppm molybdenite, 2 ppm gold and 9 ounces of silver per ton.

Comment (Exploration): Status = Active

Comment (Reference): Primary Reference = Salisbury and Dietz, 1984

Comment (Geology): Age = The similarity of the Nim deposit to the Upper Cretaceous (70-65 Ma) Golden Zone mine (HE043) suggests that they are probably the same age.

References

Reference (Deposit): Clark, A.L., and Cobb, E.H., 1972, Metallic mineral resources map of the Healy quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-394, 1 sheet, scale 1:250,000.

Reference (Deposit): Balen, M.D., 1990, Geochemical sampling results from the Bureau of Mines Investigations in the Valdez Creek mining district, Alaska: U.S. Bureau of Mines Open-File Report 34-90, 218 p., 2 plates, scale 1:250,000.

Reference (Deposit): Salisbury and Dietz, Inc., 1984, 1983 mineral resource studies: Kantishna Hills and Dunkle Mine areas, Denali National Park and Preserve, Alaska: U.S. Bureau of Mines, Contract No. S0134031, 1080 p.

Reference (Deposit): Hawley, C.C., and Clark, A.L., 1974, Geology and mineral deposits of the upper Chulitna district, Alaska: U.S. Geological Survey Professional Paper 758-B, p. 1-47, 2 sheets, scale 1:12,000 and 1:48,000.

Reference (Deposit): Bundtzen, T.K., Eakins, G.R., Clough, J.G., Lueck, L.L., Green, C.B., Robinson, M.S., and Coleman, D.A., 1984, Alaska's Mineral Industry, 1983: Alaska Division of Geological and Geophysical Surveys Special Report 33, 56 p.

Reference (Deposit): Bundtzen, T.K., 1983, Mineral resource modeling, Kantishna and Dunkle mine study areas: Alaska Division of Geological "&" Geophysical Surveys Report of Investigations 83-12, 51 p.

Reference (Deposit): Hawley, C.C., and others, 1978, Mineral appraisal of lands adjacent to Mt. McKinley National Park, Alaska. Contract No. JO166107: U.S. Bureau of Mines Open-File Report 24-78, 274 p., 12 sheets.

Reference (Deposit): Kurtak, J.M., Southworth, D.D., Balen, M.D., and Clautice, K.H., 1992, Mineral investigations in the Valdez Creek mining district, south-central Alaska: U.S. Bureau of Mines Open-File Report 1-92, 659 p., 2 plates, scale 1:250,000.

Reference (Deposit): Ross, C.P., 1933, The Valdez Creek mining district, Alaska: U.S. Geological Survey Bulletin 849, p. 289-467.

Reference (Deposit): Capps, S.R., 1924, Geology and mineral resources of the region traversed by the Alaska Railroad: U.S. Geological Survey Bulletin 755-C, p. 73-150.

The Top Ten Gold Producing States

These ten states contributed the most to the gold production that built the West from 1848 through the 1930s. The Top Ten Gold Producing States.