Last Chance No. 2

Prospect, Inactive

Alternative names

Last Chance

Commodities and mineralogy

Main commodities Au
Ore minerals arsenopyrite; gold
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale AN
Quadrangle map, 1:63,360-scale A-3
Latitude 61.02
Longitude -148.08
Nearby scientific data Find additional scientific data near this location
Location and accuracy Located on the western edge of Barry Arm, 1.6 miles north-northwest of BM Ken - southern tip of Pakenham Point. Accurate within 0.5 mile. Locality 61 of Cobb (1972), locality 50 of MacKevett and Holloway (1977), and locality A-22 of Jansons and others (1984).

Geologic setting

Geologic description

Quartz vein cuts Late Cretaceous massive graywacke and minor slate of the Valdez Group. The quartz vein is up to 3 ft thick, strikes N 10 E, and dips 10 W. The vein can be traced for 150 ft and contains large quartz crystals, arsenopyrite, and gold. Assays indicate 0.63 oz/ton Au (Johnson, 1914).
Geologic map unit (-148.082059920073, 61.0194285422891)
Mineral deposit model Chugach-type low-sulfide Au-quartz vein? (Bliss, 1992; model 36a.1?) or Polymetallic veins? (Cox and Singer, 1986; model 22c?).
Mineral deposit model number 36a.1? or 22c?
Age of mineralization Late Cretaceous or younger; vein cuts massive graywackes and minor slates of the Late Cretaceous Valdez Group.

Production and reserves

Workings or exploration Assays indicate 0.63 oz/ton Au (Johnson, 1914). Ground quartz vein yielded free gold.
Indication of production None

References

MRDS Number A011665
Reporters D.P. Bickerstaff (USGS contractor); S.W. Huss (USGS)
Last report date 7/30/1998