|Quadrangle map, 1:250,000-scale||CR|
|Quadrangle map, 1:63,360-scale||A-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The Moonshine Mine is about 0.3 mile west of the center of Lake Williams and about 0.6 mile southeast of the center of section 31, T. 77 S, R. 89 E. The location is accurate to within 0.1 mile.|
The Moonshine Mine was discovered before 1914, and produced a little ore (Smith, 1914; Chapin, 1916). The workings consist of two adits, 68 and 78 feet long, and an open cut; the longer adit has a winze and a small stope. As described by Maas and others (1991, 1995), a quartz vein 3.2 to 4.3 feet thick is exposed in the open cut for about 100 feet; the vein strikes N60W and dips 40N. The two adits penetrate the hanging wall of the vein exposed in the open cut and intersect several other veins. Several samples across the vein in the open cut contained 60 to 390 parts per billion gold. The highest gold values were in a 0.7-foot quartz vein in one of the adits: 3 samples contained 0.723 to 63.195 ounces of gold per ton. Smith (1914) indicates that the veins contain pyrite and tetrahedrite. Chapin (1916) describes the deposit as blocks of marble and schist cut by a network of quartz veins with disseminated chalcopyrite and pyrite.The rocks in the Dolomi area are part of the Wales Group of Late Proterozoic and Cambrian age (Herreid, 1967). They are folded into a large dome centered over the eastern third of Paul Lake, and consist of several marble layers 200 to 1300 feet thick, interbedded with calcareous chlorite schist and marble.
|Geologic map unit||(-132.053460661937, 55.1438942835872)|
|Mineral deposit model||Low-sulfide gold-quartz vein (Cox and Singer, 1986; model 36a).|
|Mineral deposit model number||36a|
|Age of mineralization||Veins are younger than the Late Proterozoic or Cambrian host rocks.|
|Workings or exploration||The workings consist of two short adits, one with a winze and a small stope, and an open cut.|
|Indication of production||Yes; small|
|Production notes||Minor production prior to 1914.|
Chapin, Theodore, 1916, Mining developments in southeastern Alaska: U.S. Geological Survey Bulletin 642-B, p. 73-104.
Herreid, Gordon, 1967, Geology and mineral deposits of the Dolomi area, Prince of Wales Island, Alaska: Alaska Division of Mines and Minerals Geologic Report 27, 17 p.
Maas, K.M., Bittenbender, P E., and Still, J.C., 1995, Mineral investigations in the Ketchikan mining district, southeastern Alaska: U.S. Bureau of Mines Open-File Report 11-95, 606 p.
Maas, K.M., Still, J.C., Clough, A.H., and Oliver, L.K., 1991, Mineral investigations in the Ketchikan mining district, Alaska, 1990: southern Prince of Wales Island and vicinity: U.S. Bureau of Mines Open-File Report 33-91, 139 p., 12 sheets, scale 1:63,360.
|Reporters||D.J. Grybeck (Applied Geology)|
|Last report date||5/1/2004|