Unnamed (northeast of Independence Lake) (ARDF #JU018) Au, Cu, Pb, W

Unnamed (northeast of Independence Lake)

Occurrence, Inactive

Commodities and mineralogy

Main commodities	Au; Cu; Pb; W
Gangue minerals	calcite; quartz

Geographic location

Quadrangle map, 1:250,000-scale	JU
Quadrangle map, 1:63,360-scale	D-4
Latitude	58.9002
Longitude	-135.1083
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	This occurrence is at an elevation of about 3,100 feet, approximately 1 mile northeast of Independence Lake and 1.4 mile east of Lynn Canal. It is in the S1/2 section 20 or N1/2 section 29, T. 34 S., R. 62 E. of the Copper River Meridian. The location is accurate within 1/2 mile.

Geologic setting

Geologic description The U.S. Bureau of Mines investigated this area in 1986 and 1987 in response to increased exploration activity 3 miles to the south in the Kensington area (JU029). They collected several samples of quartz and quartz-calcite veins, and calcite breccia. A 1-foot channel sample across a quartz-calcite vein in metavolcanic rock contained 50.0 ppm gold, 490 ppm copper, 70 ppm lead, and 14 ppm tungsten. Placid Oil Company staked several claims in this area in the early 1980s (Clough, 1990). The country rocks in the area of this occurrence are upper Paleozoic or Mesozoic metasedimentary and metavolcanic strata on the western margin of the Coast Plutonic-Metamorphic Complex (Brew and others, 1992).
Geologic map unit	(-135.110120812693, 58.899869399362)

Geologic description

The U.S. Bureau of Mines investigated this area in 1986 and 1987 in response to increased exploration activity 3 miles to the south in the Kensington area (JU029). They collected several samples of quartz and quartz-calcite veins, and calcite breccia. A 1-foot channel sample across a quartz-calcite vein in metavolcanic rock contained 50.0 ppm gold, 490 ppm copper, 70 ppm lead, and 14 ppm tungsten. Placid Oil Company staked several claims in this area in the early 1980s (Clough, 1990). The country rocks in the area of this occurrence are upper Paleozoic or Mesozoic metasedimentary and metavolcanic strata on the western margin of the Coast Plutonic-Metamorphic Complex (Brew and others, 1992).

Geologic map unit

(-135.110120812693, 58.899869399362)

Production and reserves

Workings or exploration	Placid Oil Company staked several claims in this area in the early 1980s (Clough, 1990). Only surface samples have been collected.
Indication of production	None

References

References Brew, D.A., Himmelberg, G.R., Loney, R.A., and Ford, A.B., 1992, Distribution and characteristics of metamorphic belts in the southeastern Alaska part of the North American Cordillera--Metamorphic styles in young and ancient orogenic belts: Journal of Metamorphic Geology, v. 10, no. 3, p. 465-482. Clough, A.H., 1990, Bureau of Mines mineral investigations in the Juneau mining district, Alaska, 1984-1988, Volume 2, Detailed mine, prospect, and mineral occurrence descriptions, Section E, Coast Range subarea: U.S. Bureau of Mines of Mines Special Publication, 44 p.
Reporters	J.C. Barnett and L.D. Miller (Juneau, Alaska )
Last report date	12/15/2001