|Quadrangle map, 1:250,000-scale||CH|
|Quadrangle map, 1:63,360-scale||C-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Mule Creek is a small south-flowing tributary to the Bettles River. Its mouth is approximately 4 1/2 miles northeast of the north end of Bob Johnson Lake (formerly Big Lake). There was some mining in the late 1930s at an unknown location, and prior to 1910 there was mining 1 1/2 to 2 1/2 miles upstream from the mouth of the creek. The coordinates reflect this early mining in the west half of section 16, T. 32 N., R. 8 W.|
Geologic descriptionMule Creek was mined intermittently from 1901 to 1909 and produced at least 15 ounces of gold as well as copper and silver nuggets up to 7 pounds (Maddren, 1913). This early mining took place on a bench about 2 1/2 miles upstream from the mouth in 8 feet of gravel, and about 1 1/2 mile upstream in 2 feet of gravel. In the 1930s, two or three shafts were sunk in the alluvial fan near the mouth of the creek, and another about 1,000 feet upstream (Reed, 1938). Several of these shafts were 75 to 80 feet deep but flooded before reaching bedrock. Reed (1938) reported that the gravel was coarse and waterworn, with many large boulders, and that depth to bedrock was 3 to 8 feet (in the mining before 1910?). In 1937 and 1938, 35 ounces of gold was produced by hand mining. Dillon (1987) reported active claims in 1985. Kurtak and others (2002) examined Mule Creek as part of their study of the mineral resources of the Koyukuk mining district. They panned samples along the creek; a few pans showed visible gold but most did not. They located several of the shafts sunk in the 1930s but found no evidence of any recent mining.
|Geologic map unit||(-149.355953724282, 67.6000958059951)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Mule Creek was mined intermittently from 1901 to 1909 (Maddren, 1913). In the 1930s, two or three shafts were sunk in the alluvial fan near the mouth of the creek and another about 1,000 feet upstream (Reed, 1938). Several of these shafts were 75 to 80 feet deep but flooded before reaching bedrock. In 1937 and 1938, 35 ounces of gold was produced by hand mining. Dillon (1987) reported active claims in 1985. Kurtak and others (2002) examined Mule Creek as part of their study of the mineral resources of the Koyukuk mining district.|
|Indication of production||Yes; small|
|Production notes||From incomplete records, Kurtak and others (2002) documented production of 50 ounces of gold from Mule Creek: 15 ounces in 1906, 10 ounces in 1937, and 25 ounces in 1938.|
This prospect is on Doyon Ltd. selected lands; for more information, contact Doyon Ltd., Fairbanks, Alaska.
Reed (1938) pointed out that Maddren (1913) incorrectly identified Big Spruce Creek (the next tributary to the east of the Bettles River) as Mule Creek and that Mule Creek was unnamed.MAS No. 0020310043
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.
Cobb, E.H., and Cruz, E.L., 1983, Summaries of data and lists of references to metallic and selected nonmetallic mineral deposits in the Chandalar quadrangle, Alaska: U.S. Geological Survey Open-File Report 83-278, 91 p.
Dillon, J.T., 1987, Upper Koyukuk district land and mining claim status current to 1985: Alaska Division of Geological and Geophysical Surveys, Public Data File 87-11, 25 pages, 1 map, scale 1:125,000.
Kurtak, J.M., Klieforth, R.F., Clark, J.M., and Maclean, E.A., 2002, Mineral investigations in the Koyukuk mining district, northern Alaska, 2 vols.: Bureau of Land Management, Alaska Technical Report 50, 845 p.
Maddren, A.G., 1910, The Koyukuk-Chandalar gold region: U.S. Geological Survey Bulletin 442-G, p. 284-315.
Maddren, A.G., 1913, The Koyukuk-Chandalar region, Alaska: U.S. Geological Survey Bulletin 532, 119 p.
|Reporters||J.M. Britton (Anchorage, Alaska); D.J. Grybeck (Contractor, U.S. Geological Survey)|
|Last report date||4/18/2010|