|Quadrangle map, 1:250,000-scale||SR|
|Quadrangle map, 1:63,360-scale||D-7|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The Whistler prospect is in the Downing mine area (see additional comments). The map site is in the SE1/4 section 31, T. 9 N., R. 1 W., of the Seward Meridian. It is on the south valley wall of Bonanza Creek, at an elevation of 2,500 feet (Jansons and others, 1984). The Whistler prospect is half a mile southwest of the Francisco prospect (SR017). This is location 9 of Cobb and Richter (1972), location 8 of MacKevett and Holloway (1977), location 20 of Tysdal (1978 [MF-880-A]), locations 17, 19, and 20 of Cobb and Tysdal (1980), and location S-294 of Jansons and others (1984). The location is accurate to within a quarter of a mile.|
Geologic descriptionThe Whistler deposit consists of an auriferous, sulfide-bearing, quartz vein in slate of the Valdez Group of Late Cretaceous age (Tuck, 1933; Nelson and others, 1985). The vein is 2 to 6 inches thick and nearly parallel to the cleavage of the slate, which strikes N25E and dips 72E. An adit was driven on this vein for a distance of 50 feet, but the vein is cut off by a fault that strikes N70E and dips 80N. Tuck (1933) speculated that the fault displacement was small and that the continuation could be found, but the vein proved too small to be mineable.
|Geologic map unit||(-149.520263196759, 60.8209310958828)|
|Mineral deposit model||Low-sulfide Au-quartz vein (Cox and Singer, 1986; model 36a)|
|Mineral deposit model number||36a|
|Age of mineralization||Cretaceous or younger; the vein cuts rocks of the Valdez Group of Late Cretaceous age.|
|Workings or exploration||Workings consist of one 50-foot adit driven along a 2- to 6-inch-wide quartz vein (Tuck, 1933). The U.S. Bureau of Mines examined this property in 1982 and collected two select grab samples and a chip sample (Hoekzema and Sherman, 1983). These samples assayed nil to 0.39 ounce of gold per ton, and nil to 0.3 ounce of silver per ton (Jansons and others, 1984). The samples were collected from the rock dump of the 50-foot adit.|
|Indication of production||Undetermined|
|Production notes||The U.S. Bureau of Mines reported a recorded production of 150 ounces of gold (Jansons and others, 1984). This might include production from the Francisco (SR017) and Bonanza (SR018) prospects, as well as from the Whistler.|
Additional commentsIn his description of this deposit, Tuck (1933) also included references to the Francisco (SR017), Bonanza (SR018), and another (unnamed) prospect (SR306) on Bonanza Creek. The Francisco, Whistler, and Bonanza are also known as the Downing mine (Jansons and others, 1984). Tysdal (1978 [MF-880-A]) considered these to be separate prospects.
Cobb, E.H., and Richter, D.H., 1972, Metallic mineral resources map of the Seward quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-466, 2 sheets, scale 1:250,000.
Cobb, E.H., and Tysdal, R.G., 1980, Summaries of data on and list of references to metallic and selected nonmetallic mineral deposits in the Blying Sound and Seward quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-621, 276 p.
Hoekzema, R.P., and Sherman, G.E., 1983, Mineral investigations in the Chugach National Forest, Alaska (Peninsula study area): U.S. Bureau of Mines in-house report; held at U.S. Bureau of Land Management Alaska State Office, Anchorage, 524 p.
Jansons, Uldis, Hoekzema, R.B., Kurtak, J.M., and Fechner, S.A., 1984, Mineral occurrences in the Chugach National Forest, southcentral Alaska: U.S. Bureau of Mines Mineral Land Assessment 5-84, 218 p., 2 sheets, scale 1:250,000.
MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.
Mitchell, P.A., 1979, Geology of the Hope-Sunrise (gold) mining district, north-central Kenai Peninsula, Alaska: Stanford University Master of Science thesis, 123 p.
Nelson, S.W., Dumoulin, J. A., and Miller, M.L., 1985, Geologic map of the Chugach National Forest, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1645-B, 16 p., 1 sheet, scale 1:250,000.
Tuck, Ralph, 1933, The Moose Pass-Hope district, Kenai Peninsula, Alaska: U.S. Geological Survey Bulletin 849-I, p. 469-530.
|Reporters||Jeff A. Huber (Anchorage)|
|Last report date||2/20/2000|