The Headwall is a gold, antimony, and tin 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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Headwall MRDS details
Site Name
Primary: Headwall
Commodity
Primary: Gold
Primary: Antimony
Primary: Tin
Secondary: Copper
Secondary: Lead
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
Not available
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Silicification and tourmalinization.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Arsenopyrite
Ore: Bindheimite
Ore: Bismuth
Ore: Chalcopyrite
Ore: Galena
Ore: Pekoite
Ore: Scorodite
Gangue: Quartz
Gangue: Sericite
Gangue: Tourmaline
Comments
Comment (Reserve-Resource): Reserves = Assuming dimensions, in feet, of 4.45 x 400 x 790, Bundtzen and Laird (1991) estimate a resource of 82,900 tons of material with average grades of 3.3 ppm gold, 7.32 percent arsenic, 0.16 percent antimony, and 0.04 percent tin. Bismuth, copper, and lead analyses are not available.
Comment (Workings): Workings / Exploration = Surface observation and sampling has been completed (Bundtzen and Laird, 1991).
Comment (Geology): Geologic Description = The Headwall prospect is in syenite and includes several 10-foot wide banded tourmaline greisen zones that trend northwest for a distance of at least 790 feet (Bundtzen and Laird, 1991). The zones are exposed over a vertical range of 400 feet. The tourmaline greisens contain euhedral quartz, along with sericite and sulfide veinlets and clots. Arsenopyrite, native bismuth, pekoite, galena, bindheimite, and scorodite have been identified in the sulfide-rich assemblages (Bundtzen and Laird, 1991). The sulfide-bearing zones are disrupted by later faulting. Six channel samples average 3.3 ppm gold, 7.32 percent arsenic, 0.16 percent antimony, and 0.04 percent tin. Bismuth, copper, and lead analyses are not available. Assuming dimensions, in feet, of 4.45 x 400 x 790, Bundtzen and Laird (1991) estimated a resource of 82,900 tons of material with the stated average grades. The host rocks are part of the Upper Cretaceous intrusive complex of the Russian Mountains.
Comment (Geology): Age = Late Cretaceous or Tertiary. Greisens crosscut part of the intrusive complex of the Russian Mountains. Quartz monzonite from this complex has yielded a K/Ar age of 70.3 +/- 2.1 Ma (Bundtzen and Laird, 1991).
Comment (Reference): Primary Reference = Bundtzen and Laird, 1991
References
Reference (Deposit): Bundzten, T.K., and Laird, G.M., 1991, Geology and mineral resources of the Russian Mission C-1 Quadrangle, southwest Alaska: Alaska Division of Geological and Geophysical Surveys Professional Report 109, 24 p.
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