Upper Ruby Creek

Mine, Inactive

Commodities and mineralogy

Main commodities Ag; Au
Other commodities Bi; Th; W
Ore minerals bismuth; brookite; gold; scheelite
Gangue minerals ilmenite; magnetite

Geographic location

Quadrangle map, 1:250,000-scale MD
Quadrangle map, 1:63,360-scale A-4
Latitude 63.233
Longitude -154.778
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Upper Ruby Creek mine is located at an elevation of 1,000 feet (300 m) in Section 13, T. 26 S., R. 22 E., of the Kateel River Meridian. Location is within 300 feet (91 m).

Geologic setting

Geologic description

The Upper Ruby Creek placer mine is a continuation of the Ruby Creek-Strand deposit (MD069); the only difference is a higher stream gradient of 250 feet/mile. White and Stevens (1953) studied the abundant radioactive concentrates from Upper Ruby Creek placer deposit. Age of mineralization is unknown, but probably Quaternary, based on local geomorphology.
Geologic map unit (-154.780324347198, 63.2323922257254)
Mineral deposit model Placer Au-PGE (Cox and Singer, 1986; model 39c).
Mineral deposit model number 39c

Production and reserves

Workings or exploration Upper Ruby Creek was mined mostly prior to 1925 (Brown, 1926).
Indication of production Yes
Production notes Production data is scant and was lumped with Ruby Creek-Strand and Crystal Gulch deposits, which collectively produced 1,511 ounces (47 kg) of gold from 1920 to 1942.

Additional comments

See Ruby Creek-Strand (MD068) and Crystal Gulch (MD070) deposits. The Upper Ruby Creek mine is on lands selected or conveyed to Doyon Ltd. For further information, contact Doyon Ltd. at 210 1st Ave., Fairbanks, Alaska, 99701.