Unnamed (east-northeast of the toe of McCallum Glacier) (ARDF #MH237) Cu, Pb

Unnamed (east-northeast of the toe of McCallum Glacier)

Occurrence, Inactive

Commodities and mineralogy

Main commodities	Cu; Pb
Ore minerals	chalcopyrite; galena; pyrite
Gangue minerals	quartz

Geographic location

Quadrangle map, 1:250,000-scale	MH
Quadrangle map, 1:63,360-scale	B-4
Latitude	63.2904
Longitude	-145.5624
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	This occurrence at an elevation of 6,200 feet approximately 1 mile east-northeast of the toe of McCallum Glacier. It is near the southwest corner of section 1, T. 19 S., R. 11 E., Fairbanks Meridian. The occurrence is described by Hanson (1963, p. 73), and it corresponds to locality 28 in Cobb (1979 [OFR 79-238]) and to locality S117 in table 2 of Nokelberg and others (1991).

Geologic setting

Geologic description This occurrence consists of chalcopyrite, galena, and pyrite disseminated in silicified granodiorite (Hanson, 1963). The mineralization probably is associated with the granodiorite that intrudes the Slana Spur Formation of Pennsylvanian age (Nokleberg and others, 1991).
Geologic map unit	(-145.564644540828, 63.2899887805441)
Mineral deposit model	Porphyry Cu (Cox and Singer, 1986; model 17).
Mineral deposit model number	17
Age of mineralization	Pennsylvanian or younger.
Alteration of deposit	The granodiorite is silicified.

Production and reserves

Indication of production	None

References

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. Hanson, L.G., 1963, Bedrock geology of the Rainbow Mountain area, Alaska Range, Alaska: Alaska Division of Mines and Minerals Geologic Report 2, 82 p., 2 plates. 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. Nokleberg, W.J., Lange, I.M., Roback, R.C., Yeend, Warren, and Silva, S.R., 1991, Map showing locations of metalliferous lode and placer mineral occurrences, mineral deposits, prospects, and mines, Mount Hayes quadrangle, eastern Alaska Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1996-C, 42 p., 1 sheet, scale 1:250,000.
Reporters	W.T. Ellis (Alaska Earth Science), C.C. Hawley (Hawley Resource Group), and W.J. Nokleberg (USGS)
Last report date	8/9/2002