Alaska Nose

Prospect, Undetermined

Commodities and mineralogy

Main commodities Ag; Au; Pb; Zn
Ore minerals galena; pyrite; sphalerite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale CR
Quadrangle map, 1:63,360-scale D-1
Latitude 55.80946
Longitude -132.07767
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Alaska Nose prospect is just above the shoreline, about 0.8 mile south-southeast of Sunshine Island; it is about 0.4 mile west-northwest of the southeast corner of section 9, T. 70 S., R. 87 E.

Geologic setting

Geologic description

The Alaska Nose prospect consists of an old trench and a 13-foot shaft that seem to have escaped mention in the literature prior to their location by Maas and others (1993). The deposit consists of two sets of quartz veins in alaskite of Cretaceous age (Brew, 1996). One set of veins strikes N35E and dips 75NW; the other strikes N30W and dips 72NE. Galena, sphalerite, and pyrite occur in and along the margins of the veins which are up to 12 inches thick. A select sample from a well-mineralized portion of a vein contained 237 parts per billion gold, 88 parts per million (ppm) silver, 2,921 ppm zinc, and 2.35 percent lead.
Geologic map unit (-132.079356492192, 55.8091048461976)
Mineral deposit model Polymetallic quartz vein (Cox and Singer, 1986, model 22c).
Mineral deposit model number 22c
Age of mineralization Quartz veins cut Cretaceous alaskite.

Production and reserves

Workings or exploration The Alaska Nose prospect consists of an old trench and a 13-foot shaft that seem to have escaped mention in the literature prior to their location by Maas and others (1993).
Indication of production None

References

References

Reporters D.J. Grybeck (Applied Geology)
Last report date 5/1/2004