The Laskawonda is a silver and gold mine located in Alaska.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
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Laskawonda MRDS details
Site Name
Primary: Laskawonda
Secondary: Schoenbar
Secondary: Forest Avenue quarry
Secondary: Prison parking lot
Secondary: Nevada lode
Secondary: American Legion quarry
Secondary: Cape Fox
Commodity
Primary: Silver
Primary: Gold
Secondary: Copper
Location
State: Alaska
District: Ketchikan
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Model Name: Low-sulfide Au-quartz vein
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Pyrite
Gangue: Quartz
Comments
Comment (Reference): Primary Reference = Wright and Wright, 1908; Maas and others, 1995
Comment (Workings): Workings / Exploration = Workings in the early 1900s included surface cuts and several short adits, shafts, and tunnels most of which have been covered by housing or commercial development, or filled in.
Comment (Deposit): Model Name = Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)
Comment (Geology): Age = The quartz fissure veins that crosscut the metamorphic foliation probably are Late Cretaceous or younger.
Comment (Exploration): Status = Inactive
Comment (Geology): Geologic Description = This part of Revillagigedo Island is underlain mainly by marine, andesitic or basaltic volcanic rocks and pelitic sedimentary rocks that are intruded by Cretaceous stocks, sills, and dikes of feldspar-porphyritic granodiorite, and by a stock and probably related plugs of Tertiary gabbro (Berg and others, 1988). The strata were regionally metamorphosed to greenschist-grade phyllite and semischist in Late Cretaceous time. They subsequently were contact metamorphosed to hornblende hornfels: locally, near some of the Cretaceous granodiorite contacts, and, more widely, peripheral to the Tertiary gabbro. The premetamorphic age range of the strata is uncertain. Berg and others (1988) note that they closely resemble Upper Jurassic to mid-Cretaceous flysch and volcanic rocks nearby on Gravina Island. The country rocks are cut by a high-angle fault along Tongass Narrows that displays about 4 miles of right-lateral offset.? the Laskawonda (also referred to as Schoenbar in early reports) prospect consists of a N50W, 50NE sulfide-bearing band of phyllite and greenschist, cut by sulfide-bearing quartz fissure veinlets. The sulfide minerals are pyrite and chalcopyrite, and there were early reports of gold and silver (Wright and Wright, 1908, p. 152; Cobb and Elliott, 1980, p. 69). The deposit was explored in the early 1900s by two shafts, one of which was 85 feet deep, a short tunnel, and surface stripping.? The following five occurrences were examined in the early 1990s by Maas and others (1995, locs. 276-280), who named them either from U.S. Bureau of Mines claim records, or, informally, for local landmarks.? Loc. 276 (Maas and others, p. 201): Forest Avenue quarry. Samples of silicified(?) volcanic rocks contained up to 222 ppb Au, 2970 ppm Cu, and 111 ppm Mo.? Loc. 277: Prison parking lot. A 2-foot sample of silicified(?) volcanic rock contained 2.1 ppm Au.? Loc. 278: Nevada lode. A 7-foot sample of silicified(?) greenstone contained 1282 ppb Au and 5705 ppm Cu. A shaft on this property was plugged.? Loc. 279: American Legion quarry. Samples of unidentified material contained up to 2235 ppm Zn.? Loc. 280: Cape Fox. Samples of unidentified material contained up to 20 ppb Au. This property was explored in the early 1900s by a 24-foot adit and a shaft, which have been plugged.
References
Reference (Deposit): Wright, F.E., and Wright, C.W., 1908, The Ketchikan and Wrangell mining districts, Alaska: U.S. Geological Survey Bulletin 347, 210 p.
Reference (Deposit): Elliott, R.L., Berg, H.C., and Karl, Susan, 1978, map and table describing metalliferous and selected nonmetalliferous mineral deposits, Ketchikan and Prince Rupert quadrangles, Alaska: U.S. Geological Survey Open-file Report, 78-73-B,17 p., scale 1:250,000.
Reference (Deposit): Cobb, E.H., and Elliott, R.L., 1980, Summaries of data on and lists of references to metallic and selected nonmetallic mineral deposits in the Ketchikan and Prince Rupert quadrangles, Alaska: U.S. Geological Survey Open-File Report 80-1053, 154 p.
Reference (Deposit): Berg, H.C., Elliott, R.L., and Koch, R.D., 1988, Geologic map of the Ketchikan and Prince Rupert quadrangles, southeastern Alaska: U.S. Geological Survey Mineral Investigations Series Map MF-1807,27 p., scale 1:250,000.
Reference (Deposit): 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.
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