|Quadrangle map, 1:250,000-scale||NM|
|Quadrangle map, 1:63,360-scale||C-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This alluvial gold placer deposit is on St. Michaels Creek, a south tributary to Osborn Creek (NM305). The confluence of Osborn and St. Michaels Creek is about 2 miles upstream of the mouth of Osborn Creek on Nome River. The map location is on placer mine workings in the lower part of the creek, 1,500 feet upstream of its mouth, in the NW1/4 section 18, T. 11 S., R. 32 W., Kateel River Meridian. St. Michaels Creek is included in locality 120 of Cobb (1972 [MF 463], 1978 [OFR 78-93]).|
St. Michaels Creek has been extensively dredged for placer gold along its lower 3,000 feet. The mine workings are at surface elevations of about 50 to 75 feet. Specific information for St. Michaels Creek has not been reported, but the deposit may be similar in origin, tenor, and mining history to that on nearby Osborn Creek (NM305). St. Michaels Creek's low elevation and proximity to the lower Nome River valley suggest that Quaternary sea-level fluctuations probably influenced development of its placer deposits. Parts of St. Michaels Creek probably rework older coastal plain deposits.St. Michaels Creek barely cuts down to an elevation where Third Beach could have existed in a re-entrant to the northeast side of Army Peak. Bedrock sources of gold could also be present; bedrock exposed in the area is mainly calc-schist, mica-chlorite schist, and marble with some graphitic quartz schist (Hummel, 1962 [MF 247]).
|Geologic map unit||(-165.151607634927, 64.5405400326258)|
|Mineral deposit model||Alluvial placer Au (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Placer gold tailings are present along the lower 3,000 feet of St. Michaels Creek, where it was extensively dredged.|
|Indication of production||Yes; small|
|Production notes||St. Michaels Creek may have made significant contributions to placer gold production in this area.|
Cobb, E.H., 1972, Metallic mineral resources map of the Nome quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-463, 2 sheets, scale 1:250,000.
Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Nome quadrangle, Alaska: U.S. Geological Survey Open-File report 78-93, 213 p.
Collier, A.J., Hess, F.L., Smith, P.S., and Brooks, A.H., 1908, The gold placers of parts of Seward Peninsula, Alaska, including the Nome, Council, Kougarok, Port Clarence, and Goodhope precincts: U.S. Geological Survey Bulletin 328, 343 p.
Hummel, C.L., 1962, Preliminary geologic map of the Nome C-1 quadrangle, Seward Peninsula, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-247, 1 sheet, scale 1:63,360.
|Reporters||C.C. Hawley and Travis L. Hudson|
|Last report date||7/10/2000|