|Quadrangle map, 1:250,000-scale||EA|
|Quadrangle map, 1:63,360-scale||D-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Mission Creek is a 35-mile-long tributary that drains into the Yukon River near the town of Eagle. The location of placer gold mining on Mission Creek is uncertain; the mine coordinates are placed about 8 miles upstream of the mouth of the creek, in section 24, T. 1 S., R. 31 E., of the Fairbanks Meridian. The location is only accurate within 8 miles. Mission Creek is locality 22 of Burleigh and Lear (1994), locality 38 of Eberlein and others (1977), and locality 33 of Cobb (1972 [MF-393]).|
Rocks in the valley of upper Mission Creek are Paleozoic quartz-mica schist, greenschist, and local marble that have been intruded by Mesozoic or Tertiary granitic rocks (Foster, 1976). The rocks along lower Mission Creek consists of Late Cretaceous to Pliocene terrigenous sedimentary rocks, Precambrian limestone and greenstone, and minor Mesozoic or Tertiary granitic rocks. There are extensive Quaternary terrace deposits on the lower part of the creek. Heavy-mineral concentrates near the mouth of the creek contain ilmenite, iron oxides, zircon, garnet, anatase, and trace rutile, tourmaline, and monazite (Wedow, 1954).Mission Creek and its tributaries were prospected in the late 1800s and placer gold was observed in the gravel (Spurr, 1898). Coarse gold was found in many places on Mission Creek as of 1935, but no area had significant grades (Powers, 1935). Mining occurred on Mission Creek prior to 1936, and mining was planned for 1937 (Mertie, 1938). Gold could not be profitably recovered in 1938 (Mertie, 1942). Placer gold-bearing tributaries of Mission Creek include American Creek (EA054), Wolf Creek (EA052), Colorado Creek (EA035), and Excelsior Creek (EA032).
|Geologic map unit||(-141.416520736328, 64.8189090447897)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Mission Creek and its tributaries were prospected in the late 1800s and placer gold was observed in the gravel (Spurr, 1898). Coarse gold was found in many places on Mission Creek as of 1935, but no area had significant grades (Powers, 1935). Mining occurred on Mission Creek prior to 1936, and mining was planned for 1937 (Mertie, 1938). Gold could not be profitably recovered in 1938 (Mertie, 1942).|
|Indication of production||Yes; small|
Burleigh, R.E., and Lear, K.G., 1994, Compilation of data for Phase I of the mineral resource evaluation of the Bureau of Land Management Black River and Fortymile subunits: U.S. Bureau of Mines Open-File Report 48-94, 116 p.
Cobb, E.H., 1972, Metallic mineral resources map of the Eagle quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-393, 1:250,000 scale, 1 sheet.
Cobb, E.H., 1977, Summary of references to mineral occurrences in the Eagle quadrangle, Alaska: U.S. Geological Survey Open-File Report 77-845, 122 p.
Eberlein, G.D., Chapman, R.M., Foster, H.L., and Gassaway, J.S., 1977, Map and table describing known metalliferous and selected nonmetalliferous mineral deposits in central Alaska: U.S. Geological Survey Open-File Report 77-168-D, 132 p., 1 sheet, scale 1:1,000,000.
Foster, H.L., 1976, Geologic map of the Eagle quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series, Map 922, 1 sheet, scale 1:250,000.
Mertie, J.B., Jr., 1938, Gold placers of the Fortymile, Eagle, and Circle districts, Alaska: U.S. Geological Survey Bulletin 897-C, p. 133-261.
Mertie, J.B., Jr., 1942, Tertiary deposits of the Eagle-Circle district, Alaska: U.S. Geological Survey Bulletin 917-D, p. 213-264.
Mertie, J.B., Jr., 1969, Economic geology of platinum minerals: U.S. Geological Survey Professional Paper 630, 120 p.
Powers, J.B., 1935, Synopsis and history of early day mining and prospecting on the Fortymile River and its bars and low benches: Alaska Territorial Department of Mines Miscellaneous Report 60-2, 19 p.
Purington, C.W., 1905, Methods and costs of gravel and placer mining in Alaska: U.S. Geological Survey Bulletin 263, 273 p.
Smith, P.S., 1938, Mineral industry of Alaska in 1936: U.S. Geological Survey Bulletin 897-A, p. 1-107.
Spurr, J.E., and Goodrich, H.B., 1898, Geology of the Yukon gold district, Alaska, with an introductory chapter on the history and present condition of the district by H.B. Goodrich in Walcott, C.D., editor, Eighteenth annual report of the United States Geological Survey to the Secretary of the Interior, 1896-1897: Part III - Economic geology: U.S. Geological Survey 18th Annual Report, Part 3, p. 87-392.
|Reporters||M.B. Werdon; R.L. Flynn|
|Last report date||5/1/2002|