Unnamed Occurrence (ARDF - MM049; ridge northeast of Spruce Peak), Kantishna Mining District, Denali Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - MM049; ridge northeast of Spruce Peak) | - not defined - |
| Kantishna Mining District | Mining District |
| Denali Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 35' 50'' North , 150° 39' 57'' West
Latitude & Longitude (decimal):
Köppen climate type:
The occurrence is in Denali National Park and Preserve.
Location: This occurrence is at an elevation of about 4100 feet on an unnamed ridge between upper Myrtle Creek and upper Caribou Creek. It is about 1.4 miles north of Spruce Peak, in the NE1/4 SW1/4 section 21, T. 15 S., R. 16 W., Fairbanks Meridian. The location is accurate within 500 feet. The occurrence corresponds to number 59 of Bundtzen, Smith, and Tosdal (1976), 277 of Hawley and Associates (1978), and 66b of Bundtzen (1981).
Geology: This occurrence is a stratabound gossan developed on pyritic metafelsite of the lower Paleozoic Spruce Creek sequence (Bundtzen, 1981). The metafelsite forms stratiform lenses in graphitic and chloritic schist. The gossan can be traced southwesterly for about 1500 feet. As much as 50 percent pyrite occurs in half-inch-thick bands in the metafelsite; much of this material is oxidized to limonite. Samples contain less than 1 ppm each of gold and silver, and small amounts of copper, lead, and zinc (Thornsberry, McKee, and Salisbury, 1984, v. 2).
Workings: Reconnaissance mapping and sampling. There are no workings.
Age: Probably early Paleozoic, the protolith age of the Spruce Creek sequence.
Alteration: Iron-oxide alteration.
Commodities (Major) - Fe; (Minor) - Ag, Au
Development Status: None
Deposit Model: Stratabound deposit in metafelsite.
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
2 valid minerals.
Detailed Mineral List:
| ⓘ 'Feldspar Group' |
| ⓘ 'Limonite' |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Unclassified | |||
| ⓘ | 'Feldspar Group' | - | |
| ⓘ | 'Limonite' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
Other Databases
| Link to USGS - Alaska: | MM049 |
|---|
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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