|Quadrangle map, 1:250,000-scale||WI|
|Quadrangle map, 1:63,360-scale||B-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Conglomerate Creek is a southeast-flowing tributary to Glacier River. Its mouth is approximately 2 miles east of Delay Pass and 5.5 miles northwest of Bluecloud Mountain. There is little information to locate this placer occurrence along Conglomerate Creek and the site is arbitrarily plotted about 0.2 mile east of the center of section 28, T. 31 N., R. 14 W., of the Fairbanks Meridian, based on the location shown in Dillon (1982).|
Geologic descriptionAlthough he did not visit Conglomerate Creek, Reed (1938) reported that very good prospects were found on it in the early 1900s. Bliss and others (1988) indicated that there was some activity in the 1980s. The mining is s hampered by large conglomerate boulders in the creek. Mosier and Lewis (1986) analyzed six samples of yellow gold from Conglomerate Creek. Panned samples collected by Kurtak and others (1999) contained no visible gold although one sample contained 250 ppb gold. Only one pan contained any metallic minerals, chiefly traces of magnetite and some pyrite.
|Geologic map unit||(-150.678552392582, 67.4841651761214)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Reed (1938) noted reports of mining on this creek, and Bliss and others (1988) indicated that there was some activity in the 1980s.|
|Indication of production||Undetermined|
Additional commentsBureau of Land Management lists the locality as Cinco Mining (U. S. Bureau of Mines, 1998; Kurtak and others, 1999).
Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Chandalar and Wiseman quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-340, 205 p.
Dillon, J.T., 1982, Source of lode and placer gold deposits of the Chandalar and upper Koyukuk Districts: Alaska Division of Geological and Geophysical Surveys Open-File Report AOF-158, 25 p., 1 sheet, scale 1:250,000.
Kurtak, J.M., Klieforth, R.F., Clark, J.M., and Williams, E.M., 1999, Mineral investigations in the Koyukuk mining district, northern Alaska--Progress Report: U.S. Bureau of Land Management Open-File Report 74, 158 p.
Mosier, E.L., and Lewis, J.S., 1986, Analytical results, geochemical signatures, and sample locality map of lode gold, placer gold, and heavy-mineral concentrates from the Koyukuk-Chandalar mining district, Alaska: U.S. Geological Survey Open-File Report 86-345, 172 p.
Reed, I.M., 1938, Upper Koyukuk region, Alaska: Alaska Territorial Department of Mines Miscellaneous Report 194-7, 169 p.
U.S. Bureau of Mines, 2000, U.S.Bureau of Mines Alaska Mineral Locations Database (MAS/MILS), Wiseman quadrangle: Worldwide Web URL http://imcg.wr.usgs.gov/dem.html
|Reporters||J.M. Britton (Anchorage)|
|Last report date||8/9/2002|