Last Chance Creek

Mine, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Sb
Ore minerals gold; stibnite

Geographic location

Quadrangle map, 1:250,000-scale MM
Quadrangle map, 1:63,360-scale C-2
Latitude 63.5962
Longitude -150.7984
Nearby scientific data Find additional scientific data near this location
Location and accuracy Last Chance Creek is a tributary of Caribou Creek, which it joins about one mile below Crevice Creek (MM046). Last Chance Creek heads against Glacier Peak and the unnamed ridge between Glacier and Spruce peaks. The location is about at the midpoint of the placer deposit, in the SW1/4 of section 23, T. 15 S., R. 17 W., Fairbanks Meridian. Placer resource block L-1 of Thornsberry, McKee, and Salisbury (1984, fig. K-3) encompasses all of the placer ground in this creek.

Geologic setting

Geologic description

Last Chance Creek flows through a narrow, fairly steep, canyon. The bedrock is Birch Creek Schist (Thornsberry, McKee, and Salisbury, 1984, fig. K-2; Bundtzen, 1981). Sections of the creek have been mined by hand methods, and about 665 ounces of gold have been recovered. Most of the creek is too steep for significant gravel accumulation; there is a cumulative total of about 100,000 cubic yards of alluvium in several segments of the creek (Levell, 1984, v. 2). Three 0.1-cubic-yard samples collected in 1983 contained a trace to 0.0006 ounce of gold per cubic yard, but the samples did not represent the sections of the creek that have been mined (Levell, 1984, v. 2). Placer concentrates in lower Last Chance Creek and in Caribou Creek at the mouth of Last Chance Creek contain fragments of stibnite eroded from the Last Chance (Caribou) lode (MM043) (Prindle, 1907; Hawley and Associates, 1978).
Geologic map unit (-150.800688442401, 63.5956971720843)
Mineral deposit model Au-PGE placer deposit (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Holocene.

Production and reserves

Workings or exploration There is evidence of hand-placer mining near the mouth of Last Chance Creek and at one locality upstream.
Indication of production Yes; small
Reserve estimates There is a cumulative resource of about 100,000 cubic yards of alluvial gravel in several segments of the the creek; its gold content is unknown (Levell, 1984, v. 2).
Production notes About 665 ounces is attributed to Last Chance Creek (Levell, 1984, v.2).

Additional comments

Last Chance Creek is in Denali National Park and Preserve.

References