|Quadrangle map, 1:250,000-scale||SO|
|Quadrangle map, 1:63,360-scale||D-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Mystery Creek is a north tributary to the lower Niukluk River. Its mouth is 4.9 miles downstream from Council. Dredging was reported to have been located 3 miles above the mouth of the creek. This is locality 124 of Cobb (1972, MF 445; 1978, OF 78-181).|
Geologic descriptionDredging was reported to have taken place 3 miles above the mouth (Chapin, 1913); the gravels here were 2 to 15 feet thick on a clay false bedrock. One mile above the mouth, gravels were 7 feet thick and the pay was in the lower 3 feet. Mud Creek, a headwater tributary of Mystery Creek, contained coarse, rough gold in 3 to 4 feet of angular schist gravel and in 3 to 4 foot-deep crevices in schist bedrock (Collier and others, 1908). Mud Creek gravels were overlain by 2.5 feet of muck and the recovered gold was coarse, very rough, spongy, and somewhat rusty. Bedrock is calcareous mica schist with small quartz stringers (Collier and others, 1908); impure schistose Ordovician marble occurs in headwater parts of the area (Till and others, 1986).
|Geologic map unit||(-163.531612846292, 64.8622746020852)|
|Mineral deposit model||Placer Au-PGE (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Small-scale mining started in the 1900s and some dredging operations took place up to 1914 (Cobb, 1978, OF 78-181).|
|Indication of production||Yes; small|
Chapin, Theodore, 1914, Placer mining in the Yukon-Tanana region: U.S. Geological Survey Bulletin 592-J, p. 357-362.
Cobb, E.H., 1972, Metallic mineral resources map of the Solomon quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-445, 1 sheet, scale 1:250,000.
Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Solomon quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-181, 185 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||Travis L. Hudson (Applied Geology)|
|Last report date||8/19/1999|