Cox Gulch; Cox Pup Mine, Ruby Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Cox Gulch; Cox Pup Mine | Mine |
| Ruby Mining District | Mining District |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
64° 39' 42'' North , 155° 25' 58'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Ruby | 165 (2017) | 9.0km |
Location: Cox Gulch is a south-flowing tributary of Big Creek, about 1 1/2 miles north-northwest of Boston Dome and 5 miles south-southeast of Ruby. Cox Gulch is not marked on the USGS Ruby (C-5) Quadrangle (1952, minor revisions in 1973) but was taken from location 5 of Cobb (1972 [MF-405]), and location 13 of Eberlein and others (1977). The coordinates mark the location of mining activity in section 34, T. 9 S., R. 17 E. The location is accurate.
Geology: The bedrock underlying Cox Gulch is Paleozoic phyllite and quartzite (Puchner and others, 1998). The placer ground along Cox Gulch is overlain by 15 feet of muck and 15 feet of gravel (Chapman and others, 1963). The creek was mined and prospected for tin in 1927. Intermittent work continued into the 1940s (Cobb and Chapman, 1981). The pay streak is about 30 feet wide and 1,000 feet long. The gold is generally rough and accompanied by the presence of cassiterite. The associated gravels are subangular. Tourmaline is found in some quartz pebbles. The placer material is probably not far removed from its source (Chapman and others, 1963). Where mined, the creek yielded 0.02 ounces of gold and 0.2-0.33 pounds of cassiterite per square foot of bedrock (Eberlein and others, 1977). At least 2,100 pounds of cassiterite concentrate are stockpiled at the site; there is no record of it being sold (Chapman and others, 1963).
Workings: Cox Gulch was mined by surface methods between 1927 and the 1940s.
Age: Quaternary?
Production: At least 2,100 pounds of cassiterite were saved at the site. Production figures for gold are not available.
Commodities (Major) - Au, 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: | RB011 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Ruby DomainDomain
- Ruby TerraneAccretionary Complex
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