Last Chance Gulch

Mine, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Ag
Ore minerals gold
Gangue minerals ilmenite; magnesiochromite; magnetite

Geographic location

Quadrangle map, 1:250,000-scale ID
Quadrangle map, 1:63,360-scale D-2
Latitude 62.96051
Longitude -156.52183
Nearby scientific data Find additional scientific data near this location
Location and accuracy Last Chance Gulch, which is not named on the D-2 topographic map, enters Ganes Creek about 0.4 mile south of the mouth of Six Gulch (ID025). The coordinates are at the mouth of the gulch in the SE1/4, section 8, T. 33 N., R. 38 W., of the Seward Meridian. The location is accurate.

Geologic setting

Geologic description

Placer gold was discovered in Last Chance Gulch early in the 20th Century (Maddren, 1910). Mining took place mainly prior to 1912 (Eakin, 1914). Placer gold is accompanied ilmenite, magnesiochromite, and magnetite. The probable source of the placer gold is sub-volcanic intrusions associated with the Ganes-Yankee Creek fault (Bundtzen and Laird, 1980, 1982; Bundtzen and Miller, 1997).
Geologic map unit (-156.524194465798, 62.959877017888)
Mineral deposit model Placer Au deposit (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Probably Quaternary, based on age estimates of pre-glacial stream deposits developed near ancestral Ganes Creek (Mertie, 1916; Bundtzen, 1980 [GR 63]).

Production and reserves

Workings or exploration Production came from surface mining of shallow deposits near the mouth.
Indication of production Yes; small
Production notes Production was modest and included with totals reported from Ganes Creek (ID011). The lower gulch has not been mined since 1912 (Eakin, 1914; Doug Clark, oral communication, 2001).

References