Unnamed (east side of Richardson Highway near Phelan Creek) (ARDF #MH222) Ag, Cu

Unnamed (east side of Richardson Highway near Phelan Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities	Ag; Cu
Ore minerals	bornite; chalcopyrite; malachite
Gangue minerals	quartz

Geographic location

Quadrangle map, 1:250,000-scale	MH
Quadrangle map, 1:63,360-scale	B-4
Latitude	63.2985
Longitude	-145.6694
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	This occurrence is at an approximate elevation of 2,850 feet on the east side of the Richardson Highway near Phelan Creek. It is in the SE1/4NE1/4 section 5, T. 19 S., R. 11 E., Fairbanks Meridian. This location is accurate within a quarter-mile. The occurrence corresponds to locality S110 in table 2 of Nokelberg and others (1991).

Geologic setting

Geologic description At this location, quartz veins in joints cut meta-andesite agglomerate of the Slana Spur Formation of Pennsylvanian age (Nokleberg and others, 1991). A composite chip sample of quartz containing chalcopyrite, malachite, and bornite contained 10,000 parts per million (ppm) copper and 20 ppm silver.
Geologic map unit	(-145.671649853624, 63.2980871052064)
Mineral deposit model	Polymetallic veins (Cox and Singer, 1989; model 22c).
Mineral deposit model number	22c
Age of mineralization	Pennsylvanian or younger.
Alteration of deposit	Oxidation of copper minerals.

Production and reserves

Indication of production	None

References

References 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	8/14/2002