Bloom Prospect, Kantishna Mining District, Denali Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Bloom Prospect | Prospect |
| Kantishna Mining District | Mining District |
| Denali Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 41' 32'' North , 150° 27' 36'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
The prospect is in Denali National Park and Preserve.
Location: The Bloom prospect is on a north-facing cliff on the south bank of Canyon Creek, about 500 feet below the mouth of the North Fork. The location is accurate within 500 feet. The prospect is occurrence 103 of Thornsberry, McKee, and Salisbury (1984).
Geology: The country rocks at the Bloom prospect are interlayered, thinly- laminated and locally graphitic black quartzite and thinly-laminated tan quartzite. The rocks are sheared subparallel to their foliation (Thornsberry, McKee, and Salisbury, 1983, occurrence 103). The graphitic units are thickly coated with yellow to white sulfate(?), a common indicator of pyrite in unweathered rock. In 1983, the U.S. Bureau of Mines collected several samples at the site, but assays showed no significant concentrations of valuable metals. Gold and silver were not determined. Antimony values ranged from 6 to 30 ppm (Thornsberry, McKee, and Salisbury, 1984, v. 2).
Workings: Workings consist of a 3- by 3- foot pit (adit-cut).
Age: Holocene weathering of Precambrian country rocks.
Alteration: Extensive surface development of secondary sulfates.
Commodities (Major) - Fe(?)
Development Status: None
Deposit Model: Possible stratabound sulfide occurrences in graphitic layers of Birch Creek Schi
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsGallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrite ? | 2.EB.05a | FeS2 |
Other Databases
| Link to USGS - Alaska: | MM149 |
|---|
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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