|Quadrangle map, 1:250,000-scale||SI|
|Quadrangle map, 1:63,360-scale||D-7|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The Golden Hand Apex Mine is at an elevation of about 500 feet, about 1.3 miles east of upper Pinta Bay. The mine is 0.5 mile west-southwest of the center of sec. 22, T. 47 S., R. 57 E. It is location P-51 of Bittenbender and others (1999), location 22 of Cobb (1972, 1978), and MAS no. 0021140037 (U.S. Bureau of Land Management, 2002). The location is accurate.|
Johnson and Karl (1985) map the rocks in the area of the Golden Hand Apex Mine as Triassic(?) marble and greenstone, Cretaceous(?) phyllite, and a collage of metamorphosed Cretaceous and Cretaceous(?) sedimentary and volcanic rocks. The Triassic(?) and Cretaceous(?) rocks are separated by the Border Ranges Fault, a regional-scale, northwest-striking, steeply-dipping fault whose trace crosses the mine area. The rocks are also cut by other northwest-striking faults, and by northeast-striking faults.
Reed and Coats (1941) report that prospect pits expose limestone intruded by a small mass of quartz diorite, and that at least some of the contact is a fault; other faults also cut the limestone. Quartz replaces some of the limestone near the contact and there is some quartz-cemented limestone breccia. A few specks of gold are visible in quartz veinlets.
Bittenbender and others (1999) report that the Golden Hand Apex Mine was staked in 1921 along a quartz-bearing, northwest-striking fault zone (Stewart, 1923). Workings, mostly in the 1920s, included a 120-foot sloughed trench, 140 feet of crosscut, and 85 feet of drift. Still and Weir (1981) sampled a quartz vein exposed for 23 feet in two trenches; it averaged 0.34 ounce of gold per ton across a 3-foot mining width. A representative sample across a 0.2-foot by 3-foot, high-grade mineralized zone in the footwall of the same vein assayed 187 ounces of gold per ton, and a single selected sample assayed 489 ounces of gold per ton. A small amount of rich ore was produced in 1979 by the claim holder. According to Bittenbender and others, the property is an active inholding within the West Chichagof-Yakobi Wilderness area.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).
|Geologic map unit||(-136.173130263808, 57.7769233370321)|
|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).|
|Workings or exploration||Bittenbender and others (1999) report that the Golden Hand Apex Mine was staked in 1921 along a quartz-bearing, northwest-striking fault zone (Stewart, 1922). Workings, mostly in the 1920s, included a 120-foot sloughed trench, 140 feet of crosscut, and 85 feet of drift.|
|Indication of production||Yes; small|
|Production notes||A small amount of rich ore was produced in 1979 by the claim holder.|
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.
Reed, J.C., and Coats, R.R., 1941, Geology and ore deposits of the Chichagof mining district, Alaska: U.S. Geological Survey Bulletin 929, 148 p.
Stewart, B.D., 1923, Annual report of the mine inspector to the governor of Alaska 1923: Alaska Territorial Department of Mines, Annual Report 1923, 109 p.
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|