Ophir Creek Mine, Tolovana Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Ophir Creek Mine | Mine |
| Tolovana Mining District | Mining District |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
65° 21' 50'' North , 147° 4' 51'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Pleasant Valley | 725 (2011) | 54.5km |
| Two Rivers | 719 (2011) | 54.7km |
Location: Cobb (1972, MF-413), loc. 93. Mining occurred in the lower section of Ophir Creek, a tributary of Nome Creek. Accuracy is within 1,500 feet.
Geology: Coarse gold was discovered along Ophir Creek in 1910 (Ellsworth and Parker, 1911, p. 165). Pay gravel was discovered in shallow bench deposits in 1918 (Martin, 1920, p. 38). The largest nugget was valued at $4.30 and the gravel ran $1.25 to $1.75 per bedrock foot (Ellsworth and Parker, 1911, p. 165).
Workings: Small scale mining and prospecting 1910 - 1918 (Cobb, 1976; OFR 76-633, p. 148).
Commodities (Major) - Au
Development Status: Yes; small
Deposit Model: Placer gold deposit (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: | LG035 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- North America PlatformPassive Margin
- Yukon-Tanana lower DomainDomain
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