The Broken Shovel is a mercury and antimony 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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Broken Shovel MRDS details
Site Name
Primary: Broken Shovel
Commodity
Primary: Mercury
Primary: Antimony
Location
State: Alaska
District: Aniak
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: Simple Sb (veins, pods, etc)
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Quartz veining and silica-carbonate alteration of mafic rocks.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Cinnabar
Ore: Stibnite
Gangue: Quartz
Comments
Comment (Reference): Primary Reference = Sainsbury and Mackevett, 1965
Comment (Exploration): Status = Probably inactive
Comment (Geology): Age = Late Cretaceous or Tertiary . May be similar in age to other mercury deposits in southwest Alaska. Several of these postdate deposition and deformation of mid-Cretaceous clastic sedimentary rocks and emplacement of Upper Cretaceous or Tertiary intrusive rocks.
Comment (Deposit): Model Name = Simple Sb deposits (Cox and Singer, 1986; model 27d)
Comment (Geology): Geologic Description = The Broken Shovel prospect is 0.5 mile northeast of the Cinnabar Creek lode mercury mine (TA001). It consists of a zone of discontinuous quartz-stibnite veins along the faulted contact of a vertical mafic dike in Triassic sedimentary rocks (Sainsbury and MacKevett, 1965). The dike, exposed in a few shallow dozer trenches, is 1- to 3-feet-thick and trends N 5-20 E for a distance of at least 320 feet (Sainsbury and MacKevett, p. 40). The quartz veins are narrow, discontinuous, and only locally contain small stibnite lenses and minor cinnabar. Cinnabar was reportedly panned in the gulch drainage downslope from the Broken Shovel prospect. Cady and others (1955) report that sills of silica-carbonate rock (inferred to be altered mafic intrusive rocks) are also present in the gulch.
Comment (Workings): Workings / Exploration = A few shallow dozer trenches have explored the prospect.
References
Reference (Deposit): Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Dillingham, Sleetmute, and Taylor Mountains quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-606, 92 p.
Reference (Deposit): Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Dillingham, Sleetmute, and Taylor Mountain quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-606, 92 p.
Reference (Deposit): Cady, W.M., Wallace, R.E., Hoare, J.M., and Webber, E.J., 1955, The central Kuskokwim region, Alaska: U.S. Geological Survey Professional Paper 268, 132 p.
Reference (Deposit): Sainsbury, C.L. and MacKevett, E.M., Jr., 1965, Quicksilver deposits of southwestern Alaska: U.S. Geological Survey Bulletin 1187, 89 p.
Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Taylor Mountains quadrangle: U.S. Geological Survey Miscellaneous Field Studies Map MF-384, scale 1:250,000.
Reference (Deposit): Rutledge, F.A., 1950, Investigation of mercury deposits, Cinnabar Creek area, Georgetown and Akiak districts, Kuskokwim region, southwestern Alaska: U.S. Bureau of Mines Report of Investigations 4719, 9 p.
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