Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Au

Geographic location

Quadrangle map, 1:250,000-scale BC
Quadrangle map, 1:63,360-scale B-3
Latitude 56.33
Longitude -130.78
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Boundary occurrence, known in 1981 (Elliott and Koch, 1981, p. 8, loc. 14) only from a U.S. Bureau of Mines claims map (U.S. Bureau of Mines, 1979), probably is a placer deposit on the Unuk River approximately 1.5 mile below the Alaska-British Columbia boundary. The location is probably accurate within about a quarter of a mile.

Geologic setting

Geologic description

The country rocks in, and immediately upstream from, the area of this placer(?) occurrence are Tertiary or Cretaceous granodiorite and quartz diorite; Mesozoic or Paleozoic metasedimentary and metavolcanic rocks and minor marble; and Eocene leucocratic quartz monzonite and granodiorite (Elliott and Koch, 1981; Koch, 1996). No other geologic information about this property was publicly available in 1981 (Elliott and Koch, 1981, loc. 14).
Geologic map unit (-130.781708411901, 56.3296601031159)
Mineral deposit model Placer?
Age of mineralization Holocene?

Production and reserves

Indication of production None
Production notes Unknown, but probably small, if any

Additional comments

Ten placer(?) claims staked in the valley of Unuk River (U.S. Bureau of Mines, 1979). Occurrence is in Misty Fiords National Monument.


MRDS Number A010207
Reporters H. C. Berg (Fullerton, California)
Last report date 5/17/1998