Unnamed (near Mt. Distin)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au; Cu
Other commodities As
Ore minerals arsenopyrite; chalcopyrite; pyrite; pyrrhotite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale TL
Quadrangle map, 1:63,360-scale A-6
Latitude 62.091
Longitude -152.578
Nearby scientific data Find additional scientific data near this location
Location and accuracy Alaska Department of Natural Resources unpublished claim records show this locality, about one mile N10E of Distin Peak in the southeast quarter of Section 9, T. 23 N., R. 18 W., of the Seward Meridian.

Geologic setting

Geologic description

A small plug of Late Cretaceous (67 m.y.) diorite, assigned to the Kichatna plutons (TKk), intrudes Mesozoic flysch (KJs) in this area (Reed and Nelson, 1980). Cominco American Incorporated (unpublished report) describes vuggy veins, veinlets, and breccia of quartz-pyrrhotite- pyrite-chalcopyrite-and/or arsenopyrite that cut both the sedimentary and intrusive rocks. A similar occurrence is noted in Old Man Creek (TY026) in the Tyonek quadrangle.
Geologic map unit (-152.580243093305, 62.0904245447971)
Mineral deposit model Polymetallic veins (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c
Age of mineralization Late Cretaceous; mineralization is interpreted to be linked to the Late Cretaceous diorite that is mapped as one of the 67 m.y. old Kichatna plutons by Reed and Nelson (1980).
Alteration of deposit Quartz alteration.

Production and reserves

Workings or exploration Prospecting, silt and rock chip geochemistry and mapping at 1:12,000 scale by Cominco American Incorporated in the late 1980s.
Indication of production None

References