Occurrences, Inactive

Commodities and mineralogy

Main commodities Pb; Zn
Other commodities Ag
Ore minerals galena; sphalerite

Geographic location

Quadrangle map, 1:250,000-scale MG
Quadrangle map, 1:63,360-scale B-2
Latitude 62.28
Longitude -153.64
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Neptune occurrences are located in an unnamed east-flowing tributary of Post River, at an elevation of 3,100 feet near the center of sec. 1, T. 25 N., R. 24 W., of the Seward Meridian. The location of the occurrences is derived from a rough sketch map made by Anaconda Minerals Company in 1981, and is considered to be accurate to within about one half kilometer.

Geologic setting

Geologic description

The Neptune occurrences are a small cluster of unexplained but highly anomalous lead, zinc, and silver values (values unstated) in an area capped by the Late Cretaceous, Veleska Lake Volcanic field (Bundtzen, Harris, and Gilbert, 1997).
Scattered occurrences of galena and sphalerite in fault-controlled quartz veins may be the source of these anomalies (Brewer and others, 1992).
Geologic map unit (-153.642224191368, 62.279389208702)
Age of mineralization Unknown; may be related to Late Cretaceous, Veleska Lake Volcanic Field (Bundtzen, Harris, and Gilbert, 1997).

Production and reserves

Workings or exploration The Neptune occurrences were found by the Anaconda Minerals Company in 1980 or 1981 (Brewer and others, 1992). High lead, zinc, and silver anomalies (unstated values) may be derived from galena-sphalerite quartz veins in the area, but more work is recommended.
Indication of production None
Reserve estimates None.



Reporters T.K. Bundtzen (Pacific Rim Geological Consulting)
Last report date 4/20/1999