Last Chance Gulch Mine, Innoko Mining District, Yukon-Koyukuk Census Area, Alaska, USAi

Regional Level Types
Last Chance Gulch Mine	Mine
Innoko Mining District	Mining District
Yukon-Koyukuk Census Area	Census Area
Alaska	State
USA	Country

Location: 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.
Geology: 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).
Workings: Production came from surface mining of shallow deposits near the mouth.
Age: Probably Quaternary, based on age estimates of pre-glacial stream deposits developed near ancestral Ganes Creek (Mertie, 1916; Bundtzen, 1980 [GR 63]).
Production: 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).

Commodities (Major) - Au; (Minor) - Ag
Development Status: Yes; small
Deposit Model: Placer Au deposit (Cox and Singer, 1986; model 39a).

Other Databases

Link to USGS - Alaska:	ID023

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References