Fifth of July Creek Mine, Ruby Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Fifth of July Creek 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° 22' 39'' North , 155° 33' 21'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Ruby | 165 (2017) | 40.4km |
Location: Fifth of July Creek is a west-flowing tributary of Long Creek. The deposit is found in the lower portion of the creek, downstream from the winter trail marked on the Ruby B-6 quadrangle (USGS topographic map, 1952, minor revisions in 1972). The coordinates above correspond to location 14 of Cobb (1972 [MF-405]), and location 17 of Eberlein and others (1977), near the mouth of the creek, in section 8, T. 13 S., R. 17 E. of the Kateel River meridian. The location is accurate.
Geology: The bedrock underlying Fifth of July Creek is Paleozoic phyllite, schist, metagraywacke, metachert, greenstone, and marble (Puchner and others, 1998). Gold placer mines were operated around 1922 for a few years (Eberlein and others, 1977). The ground at the mouth was reported to be 70 to 80 feet deep, and at least 30 feet deep 0.3 miles above the mouth (Chapman and others, 1963). The gold production is unknown, but an incomplete recovery from gravel overlying 6,000 square feet of bedrock produced a washtub of cassiterite and iron-bearing concentrate (Chapman and others, 1963). Cassiterite, limonite, and black sands are common in this area. The gravel mined contained subangular to subround fragments of greenstone, schist, and quartz most of which measured less than 7 inches in diameters. Some of Fifth of July Creek's placer ground may be a bench of Long Creek which Fifth of July Creek intersects (Eberlein and others, 1977).
Workings: Fifth of July Creek was mined for a few years around 1922 (Eberlein and others, 1977).
Age: Quaternary.
Production: The gold production is unknown, but an incomplete recovery from gravel overlying 6,000 square feet of bedrock produced a washtub of cassiterite and iron-bearing concentrate (Chapman and others, 1963).
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 |
| ⓘ Gold Formula: Au |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | 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 | ⓘ Gold | Au |
Other Databases
| Link to USGS - Alaska: | RB017 |
|---|
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