|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||Bangor Creek is an east-flowing tributary to Snake River; their confluence is about 1.2 miles due west of the Snake River road. About 1.4 miles of Bangor Creek have been placer mined, from an elevation of about 175 feet at the edge of the Snake River flood plain upstream to an elevation of about 300 feet. The map location is at the approximate midpoint of the mined part of Bangor Creek in the southwest corner of section 22, T. 9 S., R. 34 W., Kateel River Meridian. It is included in locality 92 of Cobb (1972 [MF 463], 1978 [OFR 78-93]).|
Geologic descriptionBangor Creek was placer mined for about 1,500 feet above its confluence with Butterfield Creek and for more than a mile below the confluence. Mining probably began in Bangor Creek as early as 1906 (Brooks, 1911) and continued to 1914 when a 3.5 foot bucket line dredge was built (Eakin, 1915 [B 622-I, p. 367]). The dredge had a design capacity of 2,000 cubic yards of material per day and reportedly dug down for about 18 feet. Dredge tailings on Bangor Creek contain abundant large cobbles and small boulders of quartz. Before the dredge was constructed, most of the mining was near the confluence of Butterfield Creek. In this area, the grade of the placer was reported to be about 0.12 ounce of gold per cubic yard in a deposit about 14 feet deep. Most of the gold reportedly was fine-grained but some nuggets weighed about 0.75 ounce. Hematite and scheelite were present; some scheelite occurred in pieces weighing one-half pound (Moffit, 1913). Scheelite was also reported by Coats (1944) and Thorne and others (1948). Potential lode sources for the gold and scheelite in Bangor Creek include the mineralized zone on the southeast flank of Butterfield Creek (NM191), possibly the Twin Mountain zone (NM186), and the Jarosa Ridge prospect (NM193). Bangor Creek cuts through rocks tentatively correlated with the Solomon Schist which forms the core of the Twin Mountain anticline (Bundtzen and others, 1994).
|Geologic map unit||(-165.468413557653, 64.6890351122939)|
|Mineral deposit model||Alluvial placer Au (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Bangor Creek was worked by surface or by shallow underground methods from at least 1910 until 1914, when a bucketline dredge was erected on the creek. The grade of the placer reported in Moffit (1913) was 0.12 ounce of gold per cubic yard. The main period of mining apparently was from 1914 until 1918 (Mertie, 1918 [B 622-I, p. 425-449]); Cathcart, 1920). The dredge made at least two parallel passes. The lower limit of pay was just above the point where Bangor Creek enters the Snake River plain.|
|Indication of production||Yes|
|MRDS Number||A012890; D002574|
Brooks, A.H., 1911, The mining industry in 1910, in Brooks, A.K., and others, Mineral resources of Alaska, report on progress of investigations in 1910: U.S. Geological Survey Bulletin 480-B p. 21-43.
Bundtzen, T.K., Reger, R.D., Laird, G.M., Pinney, D.S., Clautice, K.H., Liss, S.A., and Cruse, G.R., 1994, Progress report on the geology and mineral resources of the Nome mining district: Alaska Division of Geological and Geophysical Surveys, Public Data-File 94-39, 21 p., 2 sheets, scale 1:63,360.
Cathcart, S.H., 1920, Mining in northwestern Alaska: U.S. Geological Survey Bulletin 712-G, p. 185-198.
Coats, R.R., 1944, Lode scheelite occurrences of the Nome area: U.S. Geological Survey Open-File Report 17, 6 p.
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.
Mertie, J.B., Jr., 1918, Placer mining on Seward Peninsula in Brooks, A.H., and others, Mineral resources of Alaska, report on progress of investigations in 1916: U.S. Geological Survey Bulletin 662, p. 451-458.
Moffit, F.H., 1913, Geology of the Nome and Grand Central quadrangles, Alaska: U.S. Geological Survey Bulletin 533, 140 p.
|Reporters||C.C. Hawley and Travis L. Hudson|
|Last report date||7/10/2000|