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