Kahiltna River; Sholan Bar; Round Bend Bar; Red Hill Bar; Boulder Bench Mine, Yentna Mining District, Matanuska-Susitna Borough, Alaska, USAi

Regional Level Types
Kahiltna River; Sholan Bar; Round Bend Bar; Red Hill Bar; Boulder Bench Mine	Mine
Yentna Mining District	Mining District
Matanuska-Susitna Borough	Borough
Alaska	State
USA	Country

Gold has also been reported in stream and bench placers on Lake Creek (TL065), which runs parallel to the Kahiltna River on its west side. See also ARDF records TY027, 028, 029 in the Tyonek quadrangle.
Location: U.S. Bureau of Mines MAS/MILS database (1998) locates this area near the confluence of Peters Creek and Kahiltna River on a circular bar in the northwest quarter of Section 14, T. 24 N., R. 9 W., of the Seward Meridian; this placer extends several hundred feet up and down stream from the coordinates given. Also shown as locality 66 by Reed and others, 1978.
Geology: At this locality Bates and Wedow (1953) report stream gravels 6 to 9 feet deep, several hundred yards wide that contain the following ore minerals in concentrate samples: cassiterite, gold, hematite, ilmenite, magnetite, monazite, platinum, scheelite, thorianite, uranothorianite. Robinson and others (1955, p. 2) report concentrates from Sholan Bar contain 0.14% U, 0.05% ThO2, 0.237% eU in concentrates and Round Bend Bar 0.08% U, 0.19% eU in concentrates. Robinson and others (1955, p. 2, 21-22) also report variable amounts of apatite, feldspar, garnet, limonite, pyroxene, quartz, sphene, spinel, tourmaline, zircon in the concentrates. A prospector's sample from a drill hole on the Kahiltna River (probably from Red Hill Bar) contained approximately 25% ilmenite, 20% monazite, 15% zircon, 15% magnetite, 5% platinum, 5% scheelite, 5% uranothorianite, 5% garnet, 3% cassiterite and 2% sphene. Gold has also been reported in stream and bench placers on Lake Creek (TL065), which runs parallel to the Kahiltna River on its west side. Also see ARDF records TY027, 028, 029 in the Tyonek quadrangle.
Workings: The drainage has been prospected and mined by various small scale surface methods.
Age: Pleistocene.

Commodities (Major) - Au; (Minor) - Fe, Pt, Sn, Th, U, W, Zr
Development Status: Undetermined.
Deposit Model: Placer Au-PGE (Cox and Singer, 1986; model 39a).

Other Databases

Link to USGS - Alaska:	TL048

Other Regions, Features and Areas containing this locality

References