Boulders of greenstone and granite (orthogneiss?) are abundant. Gravel was composed mostly of schist, marble, and quartz. Michaels Creek (NM277), Osborn Creek placer deposits mostly have gravel walls and paystreaks are floored by clay-rich false bedrock. Gold was discovered in the creek in 1900, and small-scale mining began by about 1903.Ĭomment (Geology): Geologic Description = Placer gold was discovered on Osborn Creek in 1900. Most of these tailings are probably the result of dredge operations that were almost continuous between 19. Michaels Creek (NM277) and continue upstream for about 3.2 miles. Comment (Deposit): Model Name = Alluvial placer Au (Cox and Singer, 1986 model 39a).Ĭomment (Production): Production Notes = Although production data are not available, the continuity and extent of mining operations suggest that Osborn Creek was one of the more productive creeks in the Nome area.Ĭomment (Reference): Primary Reference = Moffit, 1913Ĭomment (Workings): Workings / Exploration = Extensive placer tailings on Osborn Creek start about 0.2 mile downstream of the mouth of St.
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