|Quadrangle map, 1:250,000-scale||SI|
|Quadrangle map, 1:63,360-scale||C-7|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The Baney prospect is at an elevation of about 50 feet, north of Elbow Passage and west of Klag Island. The prospect is 0.1 mile southeast of the center of sec. 16, T. 49 S., R. 58 E. It is location P-67 of Bittenbender and others (1999), location 38 of Cobb (1972, 1978), and MAS no. 0021140011 (U.S. Bureau of Land Management, 2002). The location is accurate within about 0.2 mile.|
Johnson and Karl (1985) map the rocks in the area of this prospect as Cretaceous graywacke and argillite interbedded with sparse, lenticular beds of basalt. The rocks are cut by numerous high-angle, mainly northwest-striking faults.
Reed and Coats (1941) describe the workings on this prospect as a 20-foot-deep shaft which was flooded in 1938, and numerous open cuts, pits, and trenches. The country rock is slaty graywacke that strikes about N65W and dips about 70SW. The prospect consists of quartz veinlets in the footwall of a fault that strikes N55W and dips 50-75SW. The veinlets strike NE, dip steeply NW, and possibly occupy joints in the graywacke. One veinlet about 14 inches thick contains about 0.5 ounce of gold per ton. The prospecting also has exposed a silicified dike(?) that, along with adjacent graywacke, is cut by small veinlets of quartz that generally trend about N45E and dip 80NW.
Bittenbender and others (1999), citing Nelson (1931) and Still and Weir (1981), describe an auriferous quartz vein 0.2-3 feet thick exposed for a length of at least 300 feet. A selected sample of this material assayed 2.76 ounces of gold per ton and 0.32 percent tungsten. There is no record of production.Isotopic studies indicate that the gold-quartz veins in coastal southern and southeastern Alaska are Eocene, about 50 Ma in age (Haeussler, 1995; Goldfarb, 1997; Goldfarb and others, 1997). ARDF record SI087 provides an overview of the geology of auriferous quartz veins in the Chichagof Mining District.
|Geologic map unit||(-136.112221495353, 57.6202292612449)|
|Mineral deposit model||Low-sulfide gold-quartz vein (Cox and Singer, 1986; model 36a).|
|Mineral deposit model number||36a|
|Age of mineralization||Isotopic studies indicate that the gold-quartz veins in coastal southern and southeastern Alaska are Eocene, about 50 Ma in age (Haeussler and others, 1995; Goldfarb, 1997; Goldfarb and others, 1997).|
|Alteration of deposit||Dike(?) is silicified.|
|Workings or exploration||Reed and Coats (1941) describe developments on this prospect as a 20-foot-deep shaft which was flooded in 1938, and numerous open cuts, pits, and trenches.|
|Indication of production||Undetermined|
|Production notes||There is no record of production, but the assay data and the extent of the workings suggest that at least some gold was recovered.|
Additional commentsThe prospect is in West Chichagof-Yakobi Wilderness.
Bittenbender, P., Still, J.C., Maas, K., and McDonald, M., Jr., 1999, Mineral resources of the Chichagof and Baranof Islands area, southeast Alaska: Bureau of Land Management, BLM-Alaska Technical Report 19, 222 p.
Cobb, E.H., 1972, Metallic mineral resources map of the Sitka quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-467, scale 1:250,000.
Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Sitka quadrangle: U.S. Geological Survey Open-File Report 78-450, 124 p.
Goldfarb, R J., 1997, Metallogenic evolution of Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral Deposits of Alaska: Economic Geology Monograph 9, p. 4-34.
Goldfarb, R.J., Miller, L.D., Leach, D.L., and Snee, L.W, 1997, Gold deposits in metamorphic rocks in Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral Deposits of Alaska: Economic Geology Monograph 9, p. 151-190.
Haeussler, P J., Bradley, D., Goldfarb, R., Snee, L., and Taylor, C., 1995, Link between ridge subduction and gold mineralization in southern Alaska: Geology, v. 23, no. 11, p. 995-998.
Nelson, G.E., 1931, Report on McKallick prospect, Smith Group, Anderson-Pearce Group, Ora Group, Basoinieur Group, Radio Group, and notes on Chichagof Gold Mining Company property on Chichagof Island, Alaska: Unpublished report, 6 p. (Report held by the Mineral Information Center, Bureau of Land Management, Juneau, Alaska.)
Still, J.C., and Weir, K.R., 1981, Mineral land assessment of the west portion of western Chichagof Island, Southeast Alaska: U.S. Bureau of Mines Open-File Report 89-81, 269 p., 12 sheets.
U.S. Bureau of Land Management, 2002, Alaska mineral locations database report (Sitka quadrangle), July 2, 2002, 205 p. [http://imcg.wr.usgs.gov/dem.html]
|Reporters||H.C. Berg (U.S. Geological Survey)|
|Last report date||10/16/2004|