Latitude & Longitude (WGS84):
63° 19' 12'' North , 145° 57' 57'' West
Latitude & Longitude (decimal):
Mindat Locality ID:
201233
Long-form identifier:
mindat:1:2:201233:2
Location: This occurrence is at an elevation of 4,800 feet on the south side of a gully on the west side of North Fork Rainy Creek. It is in the SW1/4SE1/4 section 26, T. 18 S., R. 9 E., Fairbanks Meridian. It corresponds to locality 4 of Rose (1965) and locality S62 in table 2 of Nokleberg and others (1991).
Geology: This occurrence consists of several small sulfide lenses in hornfels near a small gabbro plug (Rose, 1965). The sulfides are mainly pyrrhotite (probably nickeliferous) partly altered to marcasite and minor amounts of chalcopyrite and pyrite. Upper Triassic leucogabbro is exposed a few hundred feet south of the mineral occurrence, which is in hornfelsed Slana Spur Formation of Pennsylvanian age (Nokleberg and others, 1991). A major fault passes a few hundred feet north of the prospect (Rose, 1965).
Workings: A sample of mineralized hornfels assayed less than 0.1 percent each of copper and nickel, 0.02 ounce of gold per ton, and 0.4 ounce of silver per ton (Rose, 1965). A U.S. Geological Survey sample assayed 0.6 percent copper, 0.2 percent cobalt, 0.004 ounce of gold per ton, and 0.09 ounce of silver per ton (Nokleberg and others, 1991). The occurrence is on active claims of MAN Resources.
Age: Late Triassic.
Alteration: The rock is epidotized and silicified pyroxene-bearing hornfels.
Commodities (Major) - Ag, Au, Cu, Ni
Development Status: No
Deposit Model: Ni-Cu-PGE in differentiated mafic-ultramafic sill.
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Standard
Detailed Gallery
Strunz
Chemical Elements
Commodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
4 valid minerals.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
List of minerals for each chemical element
Other Databases
| Link to USGS - Alaska: | MH150 |
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References
Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Mount Hayes quadrangle, Alaska: U.S. Geological Survey Open-File Report 79-238, 140 p. Rose, A.W., 1965, Geology and mineral deposits of the Rainy Creek area, Mt. Hayes quadrangle, Alaska: Alaska Division of Mines and Minerals Geologic Report 14, 57 p., 1 sheet, scale 1:36,000. 
