|Quadrangle map, 1:250,000-scale||TR|
|Quadrangle map, 1:63,360-scale||A-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This prospect, marked by a symbol on the topographic map, is about 2 miles east of the Whiting River at an elevation of about 3,000 feet. It is near the southeast corner of section 15, T. 44 S., R. 73 E. of the Copper River Meridian. This is location T019 of Wells and others (1986). The location is accurate.|
This prospect is in the Coast Range plutonic-metamorphic complex which consists of high-grade schist and gneiss intruded by Cretaceous and Tertiary granodiorite. The metamorphic rocks are derived from volcanic, pelitic, and minor carbonate strata of unknown protolith age (Brew and Ford, 1974, 1984). Brew and Ford (1985) show the prospect in sphene-bearing biotite-hornblende granodiorite associated with a large pendant of marble and calc-silicate granofels immediately to the east.The Whiting River prospect, also referred to as the Lost Charlie Ross, consists of several quartz veins in a dolomite roof pendant within diorite (Cobb, 1978 [OFR 78-698]). The dolomite is probably part of an assemblage of Paleozoic metamorphic rocks that outcrop discontinuously to the south of the Whiting River (Clough, 1990). Knopf (1910) describes the deposit as a quartz vein 4.5 feet wide and 100 feet long that contains arsenopyrite, pyrite, sphalerite, galena, and chalcopyrite. A sample of 'a streak of solid mineral 11 inches wide' on the footwall assayed more than 1 ounce of gold per ton, 50 ounces of silver per ton, and 40% lead. The dominant sulfide is arsenopyrite. Buddington (1929) describes an open cut along the vein and a 118-foot crosscut that did not reach the vein; also that the prospect has been known since 1898.
|Geologic map unit||(-133.444726986897, 58.0495728436416)|
|Mineral deposit model||Polymetallic replacement deposit (Cox and Singer, 1986; Model 19a)|
|Mineral deposit model number||19a|
|Workings or exploration||Buddington (1929) describes an open cut along the vein and a 118-foot crosscut that did not reach the vein; also that the prospect has been known since 1898.|
|Indication of production||None|
Brew, D.A., and Ford, A.B., 1974, Geology of the Juneau Icefield and adjacent areas, in Carter, Claire, ed., U. S. Geological Survey Alaska Program, 1974: U.S. Geological Survey Circular 700, p. 63.
Brew, D.A., and Ford, A.B., 1984, The northern Coast plutonic-metamorphic complex, southeastern Alaska and northwestern British Columbia, in Coonrad, W.C., and Elliott, R.L., eds., The United States Geological Survey in Alaska--Accomplishments during 1981: U.S. Geological Survey Circular 868, p. 120-124.
Brew, D.A., and Ford, A.B., 1985, Preliminary reconnaissance geologic map of the Juneau, Taku River, Atlin, and part of the Skagway 1:250,000 quadrangles, southeastern Alaska: U.S. Geological Survey Open-File Report 85-395, 23 p., 2 sheets, scale 1:250,000.
Buddington, A.F., 1925, Mineral investigations in southeastern Alaska: U.S. Geological Survey Bulletin 773-B, p. 71-139.
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.
Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Sumdum and Taku River quadrangles, Alaska: U.S. Geological Survey Open-File Report 78-698, 64 p.
Knopf, Adolph, 1910, Mining in southeastern Alaska: U.S. Geological Survey Bulletin 442-C, p. 133-143.
|Reporters||J.C. Barnett and L.D. Miller (Juneau, Alaska)|
|Last report date||11/27/2001|