Boulder Creek

Mine, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Bi; Sb; W
Ore minerals bismuth; gold; hematite; ilmenite; magnetite; scheelite; stibnite

Geographic location

Quadrangle map, 1:250,000-scale NM
Quadrangle map, 1:63,360-scale C-2
Latitude 64.6473
Longitude -165.5073
Nearby scientific data Find additional scientific data near this location
Location and accuracy Boulder Creek is a west tributary to Snake River; it flows east from headwaters in the eastern Nome C-2 quadrangle. An alluvial placer gold deposit was worked downstream from the Boulder Creek lode prospect (NM165) over a distance of about a mile. The location is the approximate mid-point of the placer mine and just below the junction of Boulder and Twin Mountain Creeks (Twin Mtn Ck on the map); it is accurate to within about 500 feet. Mining claims on this part of Boulder Creek are patented. This is locality 94 of Cobb (1972, MF-463; 1978, OFR 78-93).

Geologic setting

Geologic description

An alluvial placer gold deposit was worked downstream from the Boulder Creek lode prospect (NM165) over a distance of about a mile. The locality was known shortly after the discovery of the Nome district (Collier and others, 1908, p. 196), and mining claims along the creek are patented. The pay streak varied from about 100 to 300 feet in width and was from 10 to 25 feet deep. Concentrates from Boulder Creek contained native bismuth, stibnite, hematite, ilmenite and magnetite. Scheelite occurred in the concentrates below Twin Mountain Creek (Coats, 1944). The apparent head of the pay streak is the Boulder Creek lode prospect (NM165). The Boulder Creek lode is apparently developed on subsidiary structures to the Rodine fault, a major north-northeast fault of the Nome district (Bundtzen and others, 1994). Some of the placer gold in Boulder Creek is almost certainly derived from the fault and associated mineralized structures. Lower Boulder Creek flows over mica-schist and marble bedrock; some of the marble is strongly altered to ankerite.
Geologic map unit (-165.509908008458, 64.6465327325704)
Mineral deposit model Alluvial placer Au (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Quaternary.
Alteration of deposit Marble is altered to ankerite.

Production and reserves

Workings or exploration Boulder Creek was worked from about 1900 until as late as 1924 (Smith, 1924). It probably had a moderate amount of production. Collier and others (1908) reported that the gold was coarse but that miners in 1903 were making little more than wages. Placer mine activity was also reported in 1913 (Chapin, 1914, [B 592-L, p. 389]), 1914 (Eakin, 1915 [B 622-I, p. 370), 1916 (Mertie, 1918 [ B 662-I, p. 455]), and 1918 (Cathcart, 1920, p. 188). The miners apparently used an elevated sluice fed by a hydraulic elevator.
Indication of production Yes; medium

References

MRDS Number AO12892; D002584

References

Reporters C.C. Hawley and Travis L. Hudson
Last report date 3/12/2000