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Holmes Gulch Mine, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Holmes Gulch Mine | Mine |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 12' 46'' North , 154° 46' 51'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
See Hidden Creek (MD066).
Location: The Holmes Gulch placer mine is located at an elevation of 750 feet (228 m) in Section 25, T. 26 S., R. 21 E., of the Kateel River Meridian. Location is known to within 250 feet (76 m).
Geology: The Holmes Gulch placer deposit is in a steep first order stream that can be traced for about one mile (1.6 km). Gravels in Holmes Gulch were 11 ft (3.3 m) deep, and can be traced upstream 4000 ft (1,219 m) toward the Whalen shaft (MD071). Most of the mining took place at the intersection of Holmes Gulch and Hidden Creek. Boulders up to 4 ft in diameter encountered during mining. Age of mineralization is unknown, but is probably Quaternary, based on correlative geomorphological features with other dated placer deposits nearby (Bundtzen and Miller, 1997).
Workings: Small-scale, surface-hydraulic sluicing predominated. There is no evidence that heavy machinery was employed in Holmes Gulch (Mertie, 1936). Most mining took place at the intersection of Holmes Gulch and Hidden Creek.
Production: The first recorded production from Holmes Gulch took place in 1919; mining continued intermittently until 1938. The production total for Holmes Gulch was 1,065 ounces (33 kg) gold and an unknown amount of silver.
Commodities (Major) - Ag, Au; (Minor) - Bi
Development Status: Yes; small
Deposit Model: Placer Au-PGE (Cox and Singer, 1986; model no. 39c)
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
3 valid minerals.
Detailed Mineral List:
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 |
| ⓘ Native Bismuth Formula: Bi |
| ⓘ Native Gold Formula: Au |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| ⓘ | Native Bismuth | 1.CA.05 | Bi |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| Fe | Iron | |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
| Bi | Bismuth | |
| Bi | ⓘ Native Bismuth | Bi |
Other Databases
| Link to USGS - Alaska: | MD072 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Farewell-McGrath DomainDomain
- Farewell TerranePassive Margin
USA
- Alaska
- Yukon-Koyukuk Census Area
- McGrath Mining DistrictMining District
- Yukon-Koyukuk Census Area
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