| Quadrangle map, 1:250,000-scale | JU |
|---|---|
| Quadrangle map, 1:63,360-scale | B-2 |
| Latitude | 58.4532 |
| Longitude | -134.6281 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | This placer mine is at an elevation of approximately 2,200 feet in the headwaters of Montana Creek, 1 mile east of the divide between Windfall Creek and Montana Creek. It is in the NE1/4 section 27, T. 39 S., R. 65 E. of the Copper River Meridian. The location is accurate within 1/4 mile. |
Geologic descriptionThe upper Montana Creek placer deposit was discovered in 1882, shortly after discoveries in lower Montana Creek (JU110) (Redman and others, 1989). There is some production of gold reported but the amount is not documented. Placer tailings, water ditches, and remains of sluice boxes and an arrastre are visible. The mine area is underlain by black phyllite, greenschist, and greenstone. Quartz stringers containing arsenopyrite, pyrite and chalcopyrite occur in bedrock underlying the stream gravels (Redman and others, 1989). | |
| Geologic map unit | (-134.62988496899, 58.4528742007414) |
|---|---|
| Mineral deposit model | Placer Au (Cox and Singer, 1986; model 39a) |
| Mineral deposit model number | 39a |
| Age of mineralization | Quaternary. |
| Workings or exploration | The upper Montana Creek placer deposit was discovered in 1882 shortly after discoveries in lower Montana Creek. Placer tailings, water ditches, and remains of sluice boxes and an arrastre are still visible. |
|---|---|
| Indication of production | Undetermined |
| Production notes | There is some reported production of gold, but the amount is not documented. |
ReferencesGehrels, G.E., McClelland, W.C., Samson, S.D., and Patchett, P.J., 1991, U-Pb geochronology of detrital zircons from a continental margin assemblage in the northern Coast Mountains, southeastern Alaska: Canadian Journal of Earth Sciences, v. 28, no. 8, p.1285-1300.
Goldfarb, R.J., Miller, L.D., Leach, D.L., and Snee, L.W, 1997, Gold deposits in metamorphic rocks in Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral Deposits of Alaska: Economic Geology Monograph 9, p. 151-190.
Miller, L.D., Goldfarb, R.J., Gehrels, G,E., and Snee, L.W., 1994, Genetic links among fluid cycling, vein formation, regional deformation, and plutonism in the Juneau gold belt, southeastern Alaska: Geology, v. 22, p. 203-206
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| Reporters | J.C. Barnett and L.D. Miller (Juneau, Alaska ) |
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| Last report date | 12/15/2001 |