Unnamed Occurrence (ARDF - MM062; ridge at head of Spruce Creek), Kantishna Mining District, Denali Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - MM062; ridge at head of Spruce Creek) | - not defined - |
| Kantishna Mining District | Mining District |
| Denali Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 34' 45'' North , 150° 43' 29'' 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 4200 feet at the head of Spruce Creek. It is about 0.7 mile southwest of Spruce Peak. The location is accurate within 250 feet. The occurrence is approximately the same as that of sample locality 244 of Hawley and Associates (1978).
Geology: The country rocks near this occurrence are metafelsite and chloritic phyllite of the lower Paleozoic Spruce Creek sequence (Bundtzen, 1981; Thornsberry, McKee, and Salisbury, 1984, fig. K-2). The deposit is a steeply-dipping quartz-sulfide vein that strikes about N50E and is 2 to 3 feet thick. The vein is largely oxidized, but contains pyrite. A sample of residual soil along the strike of the vein contained 0.47 ppm gold, 120 ppm silver, 675 ppm copper, 14500 ppm lead, and 21000 ppm zinc (Hawley and Associates, 1978, no. 244). The lead and zinc values indicate that the vein contains galena and sphalerite.
Workings: The vein may have been explored by small pits, since sloughed.
Age: The deposit is assumed to be Eocene (see record MM091).
Alteration: Oxidation of sulfide minerals.
Commodities (Major) - Ag; (Minor) - Au, Pb, Zn
Development Status: None
Deposit Model: Polymetallic vein (Cox and Singer, 1986; model 22c).
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
4 valid minerals.
Detailed Mineral List:
| ⓘ Galena Formula: PbS |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS - Alaska: | MM062 |
|---|
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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