|Quadrangle map, 1:250,000-scale||EA|
|Quadrangle map, 1:63,360-scale||C-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Boundary Creek is a small east tributary of the Yukon River about 8 miles south of Eagle; the mouth of Boundary Creek is less than one-quarter of a mile west of the Canadian border. The location of placer gold mining on Boundary Creek is not reported; the coordinates are placed at the approximate midpoint of the creek ,in section 5, T. 3 S., R. 33 E., of the Fairbanks Meridian. Boundary Creek is locality 6 of Eberlein and others (1977) and locality 17 of Burleigh and Lear (1994).|
The rocks in the vicinity of Boundary Creek are undifferentiated Paleozoic greenschist-facies and lesser amphibolite-facies rocks, including schist, greenstone, and local marble, and minor Paleozoic or Mesozoic serpentinite (Foster, 1976). The pay streak on Boundary Creek is reported to be 10 miles long, but recovery in the early 1900s was hampered by large boulders and gravel that had to be removed to reach bedrock (Powers, 1935). The gold is coarse and sold for $18 per ounce (Powers, 1935). The placer gold contained 850 parts of gold and 145 parts of silver per thousand (Mertie, 1942). Smith (1941 [B 910-C]) reported a gold assay from Boundary Creek of 850 parts of gold per thousand.Placer gold on Boundary Creek was discovered around 1891 (Powers, 1935). Brooks (1903) reports mining on Boundary Creek in 1902.
|Geologic map unit||(-141.16510230626, 64.6798226497664)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Placer gold on Boundary Creek was discovered around 1891 (Powers, 1935). Brooks (1903) reported mining on Boundary Creek in 1902.|
|Indication of production||Yes; small|
|Production notes||The placer gold had 850 parts of gold per thousand and 145 parts of silver per thousand (Mertie, 1942). Smith (1941 [B 910-C]) reported a gold assay from Boundary Creek of 850 parts of gold per thousand.|
Brooks, A.H., 1903, Placer gold mining in Alaska in 1902: U.S. Geological Survey Bulletin 213, p. 41-48.
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., 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.
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.
|Reporters||M.B. Werdon; R.L. Flynn|
|Last report date||5/1/2002|