Metal Creek

Occurrences, Inactive

Commodities and mineralogy

Main commodities Ag; Au
Other commodities Cu
Ore minerals pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale AN
Quadrangle map, 1:63,360-scale C-4
Latitude 61.63
Longitude -148.39
Nearby scientific data Find additional scientific data near this location
Location and accuracy Near the headwaters of Metal Creek, accuracy unknown.

Geologic setting

Geologic description

Country rock along Metal Creek is Valdez Group interbedded slate, siltstone, and graywacke of Late Cretaceous age that have been metamorphosed to phyllite and quartz mica schist. These rocks are tightly folded, exhibit strong foliation, strike N 10-30 E, and dip nearly vertical. At the headwaters of Metal Creek and Glacial Fork, greenstone containing discontinuous dikes and one stock of quartz diorite are present (Lande, 1927). Quartz veins with pyrite and chlorite are common in the area. Samples assayed 0.02 oz/ton gold, 0.26 oz/ton silver, and 0.08 percent copper (Richter, 1967).
Geologic map unit (-148.392227476557, 61.6294811348442)
Age of mineralization Late Cretaceous or younger, veins cut and intrusive rocks intrude the Late Cretaceous Valdez Group sedimentary rocks.

Production and reserves

Workings or exploration Richter (1967) mentions the only lode deposits of economic significance observed in place to be the small quartz diorite stock at headwaters. Samples assayed 0.02 oz/ton gold, 0.26 oz/ton silver, and 0.08 percent copper. Float samples taken downstream show same amount, 0.02 oz/ton, of gold to be present, but silver and copper were undetectable.
Indication of production None

Additional comments

Abundance of scheelite in concentrates is enough to warrant prospecting of the area between Metal Creek and Glacier Fork (Richter, 1967).

References

MRDS Number A106216
Reporters D.P. Bickerstaff (USGS contractor)
Last report date 9/4/1998