|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 mine is on Union Gulch, a northeast headwater tributary to Buster Creek (NM304). The map location is at an elevation of about 250 feet, in the north-central part of section 23, T. 10 S., R. 33 W., Kateel River Meridian. It is locality 116 of Cobb (1972 [MF 463], 1978 [OFR 78-93]).|
Geologic descriptionThe gravels in Union Gulch are only 10 to 20 feet wide and 30 inches thick, but they are auriferous and estimated to contain about 0.2 ounce of gold per cubic yard (Collier and others, 1908). The coarse and rusty gold is concentrated on bedrock. High-angle faults juxtapose marble- and schist-rich units in this area (Hummel, 1962 [MF 247]).
|Geologic map unit||(-165.218010515031, 64.6097398140463)|
|Mineral deposit model||Alluvial placer Au (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||It is not known if other than small-scale and local hand mining took place at this site.|
|Indication of production||Yes; small|
|MRDS Number||A012916; A012926|
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.
|Reporters||C.C. Hawley and Travis L. Hudson|
|Last report date||7/10/2000|