Kahiltna River

Mine, Probably inactive

Commodities and mineralogy

Main commodities Au
Other commodities Pt; REE; Sn; Th; Ti; U; W; Zr
Ore minerals cassiterite; monazite; native gold; platinum; rutile; scheelite; uranothorianite
Gangue minerals garnet; hematite; ilmenite; magnetite; quartz; sphene; tourmaline; zircon

Geographic location

Quadrangle map, 1:250,000-scale TY
Quadrangle map, 1:63,360-scale D-2
Latitude 61.93
Longitude -150.69
Nearby scientific data Find additional scientific data near this location
Location and accuracy MacKevett and Holloway (1977, locality 6) locate this placer prospect as covering approximately four miles along the Kahlitna River centered at about the middle of Section 11 in T. 22 N, R. 18 W. (U.S. Bureau of Mines, 1998, MAS # 0020840001; Cobb, 1979, MF 385, locality 6; U.S. Bureau of Mines, 1973, localites 58, 68, and 70; and Carnes, 1976, localities 1, 2 and 3). This site is a continuation of the placers upstream described at ARDF TY027 and downstream of ARDF TY029.

Geologic setting

Geologic description

Quaternary gravels reconcentrated from Tertiary continental rock, glacial deposits or older bedrock to the north in the Talkeetna Quad. Samples are reported to contain up to 0.08% uranium and 0.03% thorium (Cobb, 1979, OFR 80-86, p. 17). Probably some small production prior to 1919. Drilling for possible dredging was done in the early 1900s. Limited prospecting may have been done more recently.
Geologic map unit (-150.692235666252, 61.9294709657979)
Mineral deposit model Placer gold (Cox and Singer, 1986; model 39a)
Mineral deposit model number 39a
Age of mineralization Quaternary

Production and reserves

Workings or exploration Probably some small production prior to 1919. Drilling for possible dredging was done in the early 1900s. Limited prospecting may have been done more recently.
Indication of production Yes; small

Additional comments

See Kahiltna River occurrences in the Tyonek Quadrangle (ARDF numbers TY027 and TY029) and to the north in the Talkeetna Quadrangle.

References

MRDS Number A010585

References

U.S. Bureau of Mines, 1998, Minerals Availability System/Minerals Industry Location System (MAS/MILS), Talkeetna quadrangle: Worldwide Web URL http://imcg.wr.usgs.gov/data.html.
Reporters Madelyn A. Millholland (Anchorage), James Riehle (USGS)
Last report date 6/1/1998