Unnamed Prospect (ARDF - MM060; ridge southeast of Spruce Peak), Kantishna Mining District, Denali Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Prospect (ARDF - MM060; ridge southeast 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° 34' 49'' North , 150° 42' 0'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
202288
Long-form identifier:
mindat:1:2:202288:1
GUID (UUID V4):
d5c014d0-6fd2-4441-a852-917e3c77e019
The prospect is in Denali National Park and Preserve.
Location: This prospect is about 0.10 mile southeast of Spruce Peak at an elevation of about 4550-4650 feet. It is in the SE1/4 SW1/4 section 29, T. 15 S., R. 16 W., Fairbanks Meridian. The prospect probably corresponds to occurrence 89 of Thornsberry, McKee, and Salisbury (1984, fig. K-8), but the site appears to be misplaced on their map.
Geology: The country rocks at this prospect are metafelsite and greenschist of the lower Paleozoic Spruce Creek sequence (Bundtzen, 1981). The deposit consists of iron-stained quartz in a shear zone that strikes NE and dips moderately to the NW. The zone is about 20 to 30 feet wide, and locally is marked by orange and red soil that contains goethite and jarosite. If the quartz once contained sulfide minerals, they have been destroyed by oxidation. The jarosite, however, suggests that they included pyrite. The oxidized material contains traces of gold and silver and about 350 ppm arsenic (Thornsberry, McKee, and Salisbury, 1984, v. 2, occurrence 89).
Workings: The shear zone was explored by a pit.
Age: The quartz vein is assumed to be Eocene (see record MM091).
Alteration: Silicified shear zone. Iron-oxide alteration.
Commodities (Major) - Ag, Au; (Minor) - As
Development Status: None
Deposit Model: Low-sulfide Au-quartz vein (Cox and Singer, 1986; model 36a).
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
3 valid minerals.
Detailed Mineral List:
| ⓘ Goethite Formula: α-Fe3+O(OH) |
| ⓘ Jarosite Formula: KFe3+3(SO4)2(OH)6 |
| ⓘ 'Limonite' |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Goethite | 4.00. | α-Fe3+O(OH) |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Jarosite | 7.BC.10 | KFe3+3(SO4)2(OH)6 |
| Unclassified | |||
| ⓘ | 'Limonite' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Goethite | α-Fe3+O(OH) |
| H | ⓘ Jarosite | KFe33+(SO4)2(OH)6 |
| O | Oxygen | |
| O | ⓘ Goethite | α-Fe3+O(OH) |
| O | ⓘ Jarosite | KFe33+(SO4)2(OH)6 |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Jarosite | KFe33+(SO4)2(OH)6 |
| K | Potassium | |
| K | ⓘ Jarosite | KFe33+(SO4)2(OH)6 |
| Fe | Iron | |
| Fe | ⓘ Goethite | α-Fe3+O(OH) |
| Fe | ⓘ Jarosite | KFe33+(SO4)2(OH)6 |
Other Databases
| Link to USGS - Alaska: | MM060 |
|---|
Other Regions, Features and Areas containing this locality
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References
