Unnamed (head of Dry Creek) (ARDF #HU013) Ag, Au

Unnamed (head of Dry Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities	Ag; Au
Other commodities	Cu; Mo; Pb
Ore minerals	pyrite
Gangue minerals	quartz

Geographic location

Quadrangle map, 1:250,000-scale	HU
Quadrangle map, 1:63,360-scale	A-6
Latitude	66.1749
Longitude	-155.9035
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	This occurrence is on the east side of the Zane Hills about 1.8 miles east of Caribou Mountain. The occurrence is at an elevation of about 3,000 feet at the head of Dry Creek, in the SW1/4 of section 10, T. 9 N., R. 14 E. of the Kateel River Meridian. The location is accurate within one-half mile.

Geologic setting

Geologic description This occurrence consists of a grab sample of quartz that contains pyrite. A sample contains 15 ppm silver, 0.4 ppm gold, 500 ppm copper, 300 ppm lead, and 30 ppm molybdenum. The rocks in the area are Cretaceous granodiorite and quartz monzonite of the Zane Hills pluton. No other information is available.
Geologic map unit	(-155.906151238724, 66.1743368195239)
Age of mineralization	The Zane Hills pluton is Cretaceous based on a K-Ar date of 81 Ma (Miller and others, 1966).

Production and reserves

Workings or exploration	Only surface sampling.
Indication of production	None

References

References Grybeck, Donald, 1977, Map showing known mineral deposits of the Brooks Range, Alaska: U.S. Geological Survey Open-File Report 77-166-C, 45 p., 1 sheet, scale 1:1,000,000. Miller, T.P., and Ferrians, O.J., Jr., 1968, Suggested areas for prospecting in the central Koyukuk River region, Alaska: U.S. Geological Survey Circular 570, 12 p.
Reporters	J.M. Britton (Anchorage)
Last report date	8/1/2002