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The Kink; North Fork of the Fortymile River Mine, Southeast Fairbanks Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| The Kink; North Fork of the Fortymile River Mine | Mine |
| Southeast Fairbanks Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
64° 23' 10'' North , 142° 1' 30'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Location: The Kink is a meander in the North Fork of the Fortymile River that was artificially cut off (Brooks, 1904). The Kink is labeled on the U.S. Geological Survey topographic map of the Eagle B-3 quadrangle (1956); the coordinates are the location where the meander wall was blasted through, in section 20, T. 6 S., R. 29 E., of the Fairbanks Meridian. The location is accurate within 100 feet. The Kink is locality 33 of Burleigh and Lear (1994), locality 45 of Eberlein and others (1977), and locality 46 of Cobb (1972 [MF-393]).
Geology: The rocks in the vicinity of The Kink are Paleozoic quartz-biotite-garnet schist (Prindle, 1905). Other rocks include Mesozoic or Tertiary granitic rocks and Paleozoic schist, quartzite, marble, gneiss, and amphibolite (Foster, 1976). In 1903, prospectors blasted through a ridge separating two arms of a meander to reroute the North Fork of the Fortymile River (Brooks, 1904). The meander was physically cut off to allow placer mining of the drained meander (see photo plates in Prindle, 1905). Mining or prospecting activity is reported during the years 1905, 1920, 1933, and 1934 (Cobb, 1977 [OFR 77-845]). A dredge was moved to The Kink around 1912(?), but it was not a success, and the dredge was idle in 1936 (Mertie, 1938). Placer cassiterite is common at The Kink (Joesting, 1943).
Workings: In 1903, prospectors blasted through a ridge separating two arms of a meander to reroute the North Fork of the Fortymile River (Brooks, 1904). The meander was physically cut off to allow placer mining of the drained meander (see photo plates in Prindle, 1905). Mining or prospecting activity is reported during the years 1905, 1920, 1933, and 1934 (Cobb, 1977 [OFR 77-845]). A dredge was moved to The Kink around 1912(?), but it was not a success, and the dredge was idle in 1936 (Mertie, 1938). Placer cassiterite is common at The Kink (Joesting, 1943).
Age: Quaternary.
Commodities (Major) - Au; (Minor) - Sn
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
2 valid minerals.
Detailed Mineral List:
| ⓘ Cassiterite Formula: SnO2 |
| ⓘ Native Gold Formula: Au |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Cassiterite | 4.DB.05 | SnO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Cassiterite | SnO2 |
| Sn | Tin | |
| Sn | ⓘ Cassiterite | SnO2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS - Alaska: | EA063 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Yukon-TananaVolcanic Arc
- Yukon-Tanana upper DomainDomain
USA
- Alaska
- Fortymile Mining DistrictMining District
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