Disappointment Creek

Mine, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities PGE
Ore minerals gold; hematite; magnetite; platinum

Geographic location

Quadrangle map, 1:250,000-scale RM
Quadrangle map, 1:63,360-scale D-8
Latitude 61.867
Longitude -161.889
Nearby scientific data Find additional scientific data near this location
Location and accuracy Disappointment Creek flows north to Wilson Creek from its headwaters near the summit of Mount Okumiak. The map site is on the lower part of the creek, in the NW1/4 sec. 35, T. 21 N., R. 69 W., of the Seward Meridian. It is included in locality 8 of Hoare and Cobb (1972, 1977).

Geologic setting

Geologic description

Placer gold mining of about the lower one-half mile of Disappointment Creek started in 1914 and continued intermittently until 1939 (Hoare and Cobb, 1977). The pay streak was as much as 300 feet wide. The gravels were 10 to 12 feet thick upstream and more than 35 feet thick at the mouth. The gravels comprised mostly small and well-rounded pebbles and cobbles as much as 8 inches in diameter. The placer concentrates included hematite, magnetite, and minor platinum (Harrington, 1918). Bedrock near the mouth includes slate and conglomerate. Elsewhere in the drainage, Carboniferous (?) to Cretaceous sedimentary and volcanic rocks are intruded by Mesozoic or Tertiary granitic rocks (Hoare and Coonrad, 1959).
Geologic map unit (-161.891376732858, 61.8662576298866)
Mineral deposit model Placer Au-PGE (Cox and Singer, 1986; model 39a)
Mineral deposit model number 39a
Age of mineralization Quaternary.

Production and reserves

Workings or exploration Open-cut mining took place intermittently from 1914 to 1939. A shaft sunk 35 feet failed to reach bedrock near the mouth, but it was abandoned because of flooding.
Indication of production Yes; small

References