The Dry Spruce Island is a 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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Dry Spruce Island MRDS details
Site Name
Primary: Dry Spruce Island
Commodity
Primary: Gold
Location
State: Alaska
District: Kodiak
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Model Name: Low-sulfide Au-quartz vein, Chugach-type
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Name: Slate
Role: Host
Age Type: Host Rock
Age Young: Late Cretaceous
Name: Slate
Role: Host
Age Type: Host Rock
Age Young: Late Cretaceous
Analytical Data
Not available
Materials
Ore: Gold
Gangue: Quartz
Comments
Comment (Workings): Workings / Exploration = This site was developed by a 30- to 40-foot shaft, a 95-foot-long adit, and a 10-foot-long cross-cut. Several tons of ore were reportedly shipped for milling.
Comment (Geology): Geologic Description = This deposit was first located in 1902 and consists of Cretaceous metasedimentary rock cut by a network of quartz veins and bunches that generally strike northeast and dip vertically. The veins typically pinch and swell and may be up to 18 inches thick. Some pinch out over short distances. The quartz is white and vesicular and is slighty iron-stained in places but generally shows little mineralization. It is reported that some high assays were obtained and that several tons of ore were shipped to the Amok Gold Mine (KD001) and milled there. The description by Capps (1937) is the latest information available.
Comment (Exploration): Status = Inactive
Comment (Reference): Primary Reference = Capps, 1937
Comment (Deposit): Other Comments = Site is on land conveyed to the Koniag Corporation.
Comment (Deposit): Model Name = Chugach-type low-sulfide gold-quartz vein (Bliss, 1992; model 36a.1), turbidite-hosted gold vein.
Comment (Geology): Age = Cretaceous or younger
References
Reference (Deposit): MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.
Reference (Deposit): Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p.
Reference (Deposit): McGee, D.L., 1972, Kodiak Island and vicinity, Alaska, geology and mineral resources: Alaska Division of Geological and Geophysical Surveys Open-File Report 31, 7 p., 1 map sheet, scale 1:250,000.
Reference (Deposit): Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Afognak, Karluk, Kodiak, and Trinity Islands quadrangles, Alaska: U.S. Geological Survey Open-File Report 79-860, 49 p.
Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Kodiak quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-460, 1 map sheet, scale 1:250,000.
Reference (Deposit): Capps, S.R., 1937, Kodiak and adjacent islands, Alaska, in Smith, P.S. and others, Mineral resources of Alaska, 1934: U.S. Geological Survey Bulletin 880, p. 111-184, 1 map sheet, scale 1:250,000.
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