|Quadrangle map, 1:250,000-scale||MM|
|Quadrangle map, 1:63,360-scale||C-2|
|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 descriptionLast 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.|
|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 commentsLast Chance Creek is in Denali National Park and Preserve.
Bundtzen, T.K., 1981, Geology and mineral deposits of the Kantishna Hills, Mt. McKinley quadrangle, Alaska: M. S. Thesis, University of Alaska, College, Alaska, 238 p.
Cox, D.P., and Singer, D.A., eds., 1986, Mineral deposit models: U.S. Geological Survey Bulletin 1693, 379 p.
Hawley, C. C. and Associates, Inc, 1978, Mineral appraisal of lands adjacent to Mt. McKinley National Park, Alaska: U. S. Bureau of Mines Open-File Report 24-78, 275 p. (paged by sections).
Levell, J. H., 1984, Appendix A, Placer, in 1983 Mineral Resource Studies: Kantishna Hills and Dunkle mine areas, Denali National Park and Preserve, Alaska: U. S. Bureau of Mines Open-File Report 129-84, Vol. 2, p. 1-219.
Prindle, L.M., 1907, The Bonnifield and Kantishna regions, Alaska: U.S. Geological Survey Bulletin 314-L, p. 205-226.
Thornsberry, V. V., McKee, C. J., and Salisbury, W. G., eds, 1984, 1983 Mineral Resource Studies: Kantishna Hills and Dunkle Mine Areas, Denali National Park and Preserve, Alaska: U. S. Bureau of Mines Open-File Report 129-84. 3 Volumes: v. 1, Text; v. 2, Appendices; v. 3, Maps. Prepared by Salisbury & Dietz, Inc., Spokane, WA.
|Last report date||4/19/2001|