Mailbox Creek Mine, Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Mailbox Creek Mine | Mine |
| Koyukuk Mining District | Mining District |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
67° 6' 15'' North , 150° 28' 55'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Location: Mailbox Creek is a south-flowing tributary to the Middle Fork, Koyukuk River; its mouth is about 1 mile upstream from Tramway Bar and 4 miles south-southwest of Twelvemile Mountain. Placer mining has been reported 2000 feet upstream from the mouth of Mailbox Creek; the coordinates approximate that location. The location is accurate.
Geology: Placer workings about a half mile upstream from the mouth of Mailbox Creek have recovered gold from fairly fine gravel that contains numerous erratic boulders. The fine gravel is derived mainly from conglomerate bedrock in the area. Fine, flaky gold occurs throughout the gravel; coarser gold is in a layer of reddish gravel near the bedrock surface. The value of the ground being worked in the mid-1930's was reported to be about $0.75 per square foot of bedrock. The fineness of the gold is 898. The State of Alaska reported that a Mining License had been issued for an operation on Mailbox Creek in 1999 (Swainbank and others, 2000). Its issuance, however, does not mean that any mining took place.
Workings: The placer was mined in the 1930's by ground sluicing and shoveling in from an open cut.
Age: Quaternary.
Production: Mining occurred from at least 1934 to 1937.
Commodities (Major) - Au
Development Status: Yes
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
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: | WI157 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Angayucham TerraneAccretionary Complex
- Koyukuk north DomainDomain
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