Lewis River Mine, Redoubt Mining District, Matanuska-Susitna Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Lewis River Mine | Mine |
| Redoubt Mining District | Mining District |
| Matanuska-Susitna Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
61° 25' 47'' North , 150° 50' 23'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Tyonek | 171 (2011) | 43.2km |
Location: MacKevett and Holloway (1977, locality 9) describe mined areas extending three to six miles downstream from the landing strip located near the head of Lewis River on the west side of Mt. Susitna in T. 14, 15 and 16 N., R. 9 W. (U.S. Bureau of Mines, 1998, MAS # 0020840026; Cobb, 1972, MF 385, locality 9; and U.S. Bureau of Mines, 1973).
Geology: MacKevett and Holloway (1977, locality 9) describe mined areas extending three to six miles downstream from the landing strip located near the head of the Lewis River on the west side of Mt. Susitna. Stream gravel carry coarse angular gold with attached quartz. Cobb (1979, OFR 80-86, p. 17-18) reports that gold is probably derived from quartz veins in local Jurassic or Cretaceous granitic bedrock or from reworked Tertiary conglomerate. Drilling for possible dredging was done in the early 1900's. Placer mining was active mostly before 1918. Bedrock is 12 to 22 feet below surface. According to Brooks (1918, p. 45-47), seven small placer operations operated in 1916 in the canyon between upper basin and the flats and produced over $2,000 in gold (worth $18.66 an ounce). One $2 nugget was found. An unknown but probably small amount of gold recovered in 1956-57 (Cobb, 1973, B 1374, p. 17).
Workings: Placer mining was active mostly before 1918. Drilling for possible dredging was done in the early 1900's. Bedrock is 12 to 22 feet below surface.
Age: Quaternary
Production: According to Brooks (1918, p. 45-47), seven small placer operations operated in 1916 in the canyon between upper basin and the flats and produced over $2,000 in gold (worth $18.66 an ounce). One $2 nugget was found. Unknown but probably small amount of gold recovered in 1956-57 (Cobb, 1973, B 1374, p. 17).
Commodities (Major) - Au
Development Status: Yes; small
Deposit Model: Placer gold(Cox and Singer, 1986; model 39a)
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
1 valid mineral.
Detailed Mineral List:
| ⓘ Native Gold Formula: Au |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
List of minerals for each chemical element
| Au | Gold | |
|---|---|---|
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS - Alaska: | TY003 |
|---|
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