Little Eldorado Creek

Mine, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Sn; W
Ore minerals cassiterite; gold; scheelite

Geographic location

Quadrangle map, 1:250,000-scale LG
Quadrangle map, 1:63,360-scale A-2
Latitude 65.058
Longitude -147.533
Nearby scientific data Find additional scientific data near this location
Location and accuracy Cobb (1972, MF-413), loc. 86, 87; NW1/4SW1/4 sec. 27, T. 3 N., R. 1 E., of the Fairbanks Meridian. The mine tailings are marked on the Livengood (A-2) quadrangle. The coordinates given are for the center of the tailings at the head of Little Eldorado Creek.

Geologic setting

Geologic description

Little Eldorado Creek drains the north side of Pedro Dome. Bedrock in the headwaters area consists of granodiorite on Pedro Dome and micaceous quartzite, quartz-mica schist and pelitic schist of the Fairbanks schist unit (Weber and others, 1992). Gold is mainly in the bench placers with some gold in the creek. Bedrock is quartz-mica schist at a depth of 60 to 120 feet (Prindle, 1908). Concentrates contain gold, cassiterite, scheelite, and wolframite (Prindle and Katz, 1909; Johnson, 1910). Bench placer mining took place in 1907-1927, 1930-1931, 1938-1940 and drift mining has been active throughout the 1990s, especially in the lower parts of the creek (Cobb, 1976; OFR 76-633, p. 113-114; Swainbank and others, 1998). U.S.S.R. & M. Dredge no. 5 moved to Little Eldorado Creek in 1948 and worked there from 1948 to 1954 (R. M. Chapman, 1978, U.S.G.S. memorandum). Total production as of 1924 was worth $2,414,000 (Smith, 1926), and production figures are not available for more recent operations. More recent drift mining in the 1990s has taken place in the Chatanika flats, near the mouth of Little Eldorado Creek (ARDF no. LG045).
Geologic map unit (-147.535447314244, 65.0575747521658)
Mineral deposit model Placer gold deposit (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a

Production and reserves

Workings or exploration Mining took place in 1907-27, 1930-31, 1938-40 (Cobb, 1976; OFR 76-633, p. 113-114) and Al Hopen mined Little Eldorado Creek throughout the 1990s. Drift mining was reported in 1925 (Moffit, 1927, p. 17). U.S.S.R. & M. Dredge no. 5 moved to Little Eldorado Creek in 1948 and worked there from 1948 to 1954.
Indication of production Yes; small
Production notes Total production as of 1924 was worth $2,414,000 (Smith, 1926). Production records are not available for recent mining activity.

References

MRDS Number A015501; D002657

References

Smith, S.S., 1917, The mining industry in the territory of Alaska during the calendar year 1915: U.S. Bureau of Mines Bulletin 142, 66 p.
Smith, S.S., 1917, The mining industry in the territory of Alaska during the calendar year 1916: U.S. Bureau of Mines Bulletin 153, 89 p.
Reporters C.J. Freeman, J.R. Guidetti Schaefer (Avalon Development Corporation)
Last report date 5/4/1999