Charlie Creek (placer)

Mine, Probably inactive

Commodities and mineralogy

Main commodities Au
Other commodities Bi; Ti
Ore minerals arsenopyrite; bismuth; bismuthinite; gold; rutile

Geographic location

Quadrangle map, 1:250,000-scale NM
Quadrangle map, 1:63,360-scale D-1
Latitude 64.858
Longitude -165.4897
Nearby scientific data Find additional scientific data near this location
Location and accuracy Charlie Creek is a south tributary to upper Sinuk River. Placer gold was mined in lower Charlie Creek from below the forks of upper Charlie Creek downstream to where it enters the flood plain of Sinuk River (Collier and others, 1908, plate X). This is locality 80 of Cobb (1972 [MF 463], 1978 [OFR 78-93]).

Geologic setting

Geologic description

Placer gold was mined on Charlie (Charley) Creek on a small scale prior to WWI (Brooks and others, 1901). Moffit (1907) reports that discovery of bismuth minerals in miners' sluice boxes led to the discovery of the bismuth-bearing quartz veins (NM048) in upper Charlie Creek (Moffit, 1907). Hummel and Chapman (1960, p. B32) reported 20 ppm bismuth from a stream sediment sample from Charlie Creek, the highest content of any creek that they sampled in the southwest Seward Peninsula except for Thomson Creek (NM036) in the Kigluaik Mountains. They also reported 300 ppm arsenic, a concentration only equaled at Rock Creek in the Nome C-1 quadrangle, suggesting the presence of arsenopyrite in the creek sediments.
Charlie Creek drains pelitic biotite-garnet schist and a highly pyritic pelitic schist (Bundzten and others, 1994). These metasedimentary rocks are probably of Precambrian or early Paleozoic protolith age (Till and Dumoulin, 1994; Bundzten and others, 1994). The schist is cut by numerous quartz veinlets in cross-joints there are a few quartz veins reportedly to be as much as 4 feet wide (Chapin, 1914 [B 592-L, p. 385-395]). The quartz veins or veinlets are probably the source of the gold, native bismuth, bismuthinite and rutile that has been reported from heavy mineral concentrates from Charlie Creek.
Geologic map unit (-165.49232900047, 64.8572397652963)
Mineral deposit model Placer Au (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Quaternary.

Production and reserves

Workings or exploration Charlie Creek was known as auriferous by 1901 (Brooks and others, 1901). The creek was mined on a small scale with sluice boxes before 1907 (Moffit, 1907). It probably has been prospected more recently.
Indication of production Undetermined

References

MRDS Number A012868

References

Reporters C.C. Hawley and Travis L. Hudson
Last report date 10/22/1999