Boulder Creek Mines, Hot Springs Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Boulder Creek Mines | Group of Mines |
| Hot Springs Mining District | Mining District |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
65° 9' 16'' North , 150° 52' 47'' West
Latitude & Longitude (decimal):
Type:
Group of Mines
Köppen climate type:
Location: This site represents an area of placer mining on Boulder Creek several miles southwest of Roughtop Mountain. The site is at a (placer) mine symbol in the south half of section 19, T. 4 N., R. 16 W., of the Fairbanks Meridian. The site corresponds to location 23 of Cobb (1972), and roughly to the U.S. Bureau of Land Management site for Boulder Creek (MAS number 0020480071).
Geology: The Boulder Creek area is underlain by Jurassic or Cretaceous clastic sedimentary rocks, which have been intruded and contact metamorphosed by the Cretaceous monzodiorite and granite Roughtop Mountain pluton (Chapman and others, 1982; Reifenstuhl and others, 1998). This site is just beyond the hornfels zone ringing Roughtop Mountain, and Boulder Creek is fed by many streams that flow through the intrusion (Chapman and others, 1982). Published descriptions of the placer deposits, and of the locations of workings on Boulder Creek, are ambiguous. See record TN078 for descriptions of placer mining on lower(?) Boulder Creek.
Workings: Published descriptions of the placer deposits, and of the locations of workings on Boulder Creek, are ambiguous. See record TN078 for descriptions of placer mining on lower(?) Boulder Creek.
Age: Quaternary.
Commodities (Major) - Au
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
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: | TN091 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Arctic AlaskaPassive Margin
- Wickersham DomainDomain
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