Unnamed (in Daisy Swift Creek) (ARDF #NM137) Au, Zn

Unnamed (in Daisy Swift Creek)

Occurrence, Probably inactive

Commodities and mineralogy

Main commodities	Au; Zn
Other commodities	Sb
Ore minerals	pyrite; sphalerite

Geographic location

Quadrangle map, 1:250,000-scale	NM
Quadrangle map, 1:63,360-scale	C-2
Latitude	64.7175
Longitude	-165.6581
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	Daisy Swift Creek is a mile-long east tributary to upper Cripple River. Its mouth is 4.5 miles upstream from where the Nome-Teller road crosses Cripple River. The location is of the stream sediment anomaly at an elevation of about 650 feet; it is within about 500 feet of outcropping mineralized rock.

Geologic setting

Geologic description During reconnaissance mapping of the area in 1990 by Kennecott Exploration Company, 2,300 ppm zinc and anomalous amounts of gold were found in a stream sediment sample from Daisy Swift Creek. The gold content of a panned concentrate from Daisy Swift Creek, collected about 2,000 feet above its mouth, was 1,570 ppb gold. Followup of stream sediment and panned concentrate samples led to discovery of a pyritized metabasite unit that contained more than 0.1 ounce of gold per ton and anomalous amounts of antimony. The source of the zinc anomaly was not determined. Daisy Swift Creek flows generally northwest in a schist unit between major bodies of the massive marble unit of Bundtzen and others (1994). The schist is mainly calc-schist, but locally it includes silicic units of probable felsic volcanic origin. The schist also includes large boudin-like masses of metabasite (C.C. Hawley, Cindy Buxton, and D.L. Olson, written communication, 1992).
Geologic map unit	(-165.660726317304, 64.7167351822652)
Mineral deposit model	Pyritized metabasite with Au.
Alteration of deposit	Pyritization.

Production and reserves

Workings or exploration	The area was explored from 1990 to 1992 by Kennecott Exploration Co.; there is no evidence of previous exploration.
Indication of production	None
Additional comments The source of the high zinc concentrations in stream sediments has not been determined.

References

MRDS Number	10307966
References Bundtzen, T.K., Reger, R.D., Laird, G.M., Pinney, D.S., Clautice, K.H., Liss, S.A., and Cruse, G.R., 1994, Progress report on the geology and mineral resources of the Nome mining district: Alaska Division of Geological and Geophysical Surveys, Public Data-File 94-39, 21 p., 2 sheets, scale 1:63,360.
Reporters	C.C. Hawley and Travis L. Hudson
Last report date	3/12/2000