|Quadrangle map, 1:250,000-scale||EA|
|Quadrangle map, 1:63,360-scale||A-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Younger Creek is a small soutn headwater tributary of the Walker Fork of the Fortymile River, about 3 miles southeast of Boundary. Younger Creek has also been refered to as the headwater branch of Walker Fork. Younger Creek is about 3 miles long; the upper 1 mile of the creek is located in Yukon Territory, Canada. Placer workings on Younger Creek extend approximately 1 mile upstream from the mouth of the creek (Yeend, 1996). The coordinates are the approximate midpoint of the placer workings, in section 11, T. 26 N., R. 22 E., of the Copper River Meridian. The location is accurate.|
Geologic descriptionThe rocks in Younger Creek valley are greenschist-facies carbonaceous schist and quartzite of the Nasina assemblage of Mississippian age (Foster, 1969 [B 1271-G]; Mortensen, 1999). Younger Creek, a headwater tributary of Walker Fork, produced placer gold from 1889 to 1896 (Spurr, 1898). The headwater tributaries of Walker Fork were mostly mined out by the turn of the century (Yeend, 1996). A small open-cut mining operation has been active on Younger Creek from 1980 through 2000 (Norm LaFramboise, Boundary Explorations, Inc., written communication, 2000).
|Geologic map unit||(-141.031858450647, 64.0480932106063)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Younger Creek, a headwater tributary of Walker Fork (see EA156), produced placer gold from 1889 to 1896 (Spurr, 1898). The headwater tributaries of Walker Fork were mostly mined out by the turn of the century (Yeend, 1996). A small open-cut mining operation has been active on Younger Creek from 1980 through 2000 (Norm LaFramboise, Boundary Explorations, Inc., written communication, 2000).|
|Indication of production||Yes; small|
Foster, H.L., 1969, Reconnaissance geology of the Eagle A-1 and A-2 quadrangles, Alaska: U.S. Geological Survey Bulletin 1271-G, p. G1-G30
Mortensen, J.K. (compiler), 1999, Yukonage--An isotopic age database for the Yukon Territory, in Gordey, S.P., and Makepeace, A.J., compilers, Yukon Digital Geology: Indian and Northern Affairs Canada, Exploration and Geological Services Division, Yukon Region.
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|