Rex Creek Mine, Bonnifield Mining District, Denali Borough, Alaska, USAi
Regional Level Types | |
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Rex Creek Mine | Mine |
Bonnifield Mining District | Mining District |
Denali Borough | Borough |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
64° 6' 10'' North , 148° 50' 9'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Healy | 1,021 (2018) | 28.1km |
Anderson | 265 (2017) | 31.7km |
McKinley Park | 185 (2014) | 41.3km |
Nenana | 376 (2017) | 52.7km |
Mindat Locality ID:
199668
Long-form identifier:
mindat:1:2:199668:8
GUID (UUID V4):
7361f88a-f563-4ab7-807c-5f264f69a4d6
Location: The Rex Creek mine is located in sec. 25, T. 9 S., R. 7 W., Fairbanks Meridian. Rex Creek is a tributary of California Creek that is south of Rex Dome. The creek has been placer mined for a mile, about 3 to 4 miles above its mouth; the mine is approximately 2.5 miles southeast of Rex Dome. The mine is locality 64 of Cobb (1972 [MF 410]).
Geology: Bedrock in the upper drainage is quartz-orthoclase-sericite schist and augen gneiss of the Totatlanika Schist; in the lower reaches, the creek is underlain by the Tertiary sandstone and conglomerate of the Healy Creek Formation (Wahrhaftig, 1970 [GQ-810]). The ground that was mined was 6 to 8 feet deep; the gold was close to or in the top foot of decayed schist bedrock (Capps, 1912, p. 47). Gold occurs in both stream and bench placers (Capps, 1912, p. 47). A bench about 50 feet above the stream was mined in 1910 (Maddren, 1918). The gold was 800 fine (Glover, 1950).
Workings: Prospecting began in 1905 or earlier, and mining was reported in 1910 (Capps, 1912, p. 44,47). Maddren (1918) reported that there was no mining in 1916. Mining occurred from 3 to 4 miles above the mouth, where a bench 50 feet above the creek was mined (Maddren, 1918). In 1925, one man ground sluiced on Rex Creek (Wimmler, 1925 [ATDM MR 195-8, p. 43]). Prospect drilling was reported in 1939 (Smith, 1941, p. 51).
Age: Quaternary placer.
Production: Total production through 1916 was worth about $5,000, or less than 250 ounces (Maddren, 1918, p. 380-383; Cobb, 1976 [OFR 76-662, p. 119]).
Commodities (Major) - Au; (Minor) - Cu, Sb
Development Status: Yes; small
Deposit Model: Placer Au (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
4 valid minerals.
Detailed Mineral List:
β Chalcopyrite Formula: CuFeS2 |
β Gold Formula: Au |
β Pyrite Formula: FeS2 |
β Stibnite Formula: Sb2S3 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 1 - Elements | |||
---|---|---|---|
β | Gold | 1.AA.05 | Au |
Group 2 - Sulphides and Sulfosalts | |||
β | Chalcopyrite | 2.CB.10a | CuFeS2 |
β | Stibnite | 2.DB.05 | Sb2S3 |
β | Pyrite | 2.EB.05a | FeS2 |
List of minerals for each chemical element
S | Sulfur | |
---|---|---|
S | β Chalcopyrite | CuFeS2 |
S | β Pyrite | FeS2 |
S | β Stibnite | Sb2S3 |
Fe | Iron | |
Fe | β Chalcopyrite | CuFeS2 |
Fe | β Pyrite | FeS2 |
Cu | Copper | |
Cu | β Chalcopyrite | CuFeS2 |
Sb | Antimony | |
Sb | β Stibnite | Sb2S3 |
Au | Gold | |
Au | β Gold | Au |
Other Databases
Link to USGS - Alaska: | FB134 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
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