Unnamed Occurrence (ARDF - MM054; Glacier Creek below Eighteen Gulch), Kantishna Mining District, Denali Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - MM054; Glacier Creek below Eighteen Gulch) | - not defined - |
| Kantishna Mining District | Mining District |
| Denali Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 35' 4'' North , 150° 54' 57'' West
Latitude & Longitude (decimal):
KΓΆppen climate type:
Mindat Locality ID:
201350
Long-form identifier:
mindat:1:2:201350:6
GUID (UUID V4):
bf6bf350-db46-473f-b1b9-6a88c9ccbfd6
The occurrence is in Denali National Park and Preserve.
Location: This unnamed occurrence is an elevation of about 1300 feet on the south side of the canyon of Glacier Creek, about 0.25 mile northwest of Eighteen Gulch. The occurrence corresponds to number 46 of Thornsberry, McKee, and Salisbury (1984). The location is probably accurate within 0.3 mile.
Geology: This occurrence consists of sulfide and alteration minerals in sheared and altered metafelsite of the lower Paleozoic Spruce Creek sequence (Bundtzen, 1981; Thornsberry, McKee, and Salisbury, 1984, v. 2, occurrence 46). Some vein quartz is present. Exposures are poor, but the mineralized felsite appears to trend northwesterly. Pyrite, the most abundant unoxidized metallic mineral, is disseminated in the metafelsite. Arsenopyrite may also be present, as suggested by a sample that contained 0.285 percent arsenic. Assays showed no precious metals or valuable base metals. The pyrite is extensively oxidized to limonite, chiefly goethite, and to jarosite. Iron oxides also stain the soil near the occurrence (Thornsberry, McKee, and Salisbury, 1984, v. 2, occurrence 46). The nature of the occurrence is uncertain; it appears to be weakly mineralized metafelsite possibly similar to that at occurreences MM018 and MM022.
Workings: The site is a poorly exposed natural outcrop.
Age: Pyrite may have been an original volcanogenic(?) component of the lower Paleozoic Spruce Creek felsite (Bundtzen, 1981). The quartz veins may represent later epigenetic mineralization (see record MM091).
Alteration: Iron-oxide alteration.
Commodities (Major) - Fe; (Minor) - As
Development Status: None
Deposit Model: Volcanogenic?
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
5 valid minerals.
Detailed Mineral List:
| β Arsenopyrite ? Formula: FeAsS |
| β Goethite Formula: Ξ±-Fe3+O(OH) |
| β Jarosite Formula: KFe3+3(SO4)2(OH)6 |
| β 'Limonite' |
| β Pyrite Formula: FeS2 |
| β Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| β | Pyrite | 2.EB.05a | FeS2 |
| β | Arsenopyrite ? | 2.EB.20 | FeAsS |
| Group 4 - Oxides and Hydroxides | |||
| β | Goethite | 4.00. | Ξ±-Fe3+O(OH) |
| β | Quartz | 4.DA.05 | SiO2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| β | Jarosite | 7.BC.10 | KFe3+3(SO4)2(OH)6 |
| Unclassified | |||
| β | 'Limonite' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Goethite | Ξ±-Fe3+O(OH) |
| H | β Jarosite | KFe33+(SO4)2(OH)6 |
| O | Oxygen | |
| O | β Goethite | Ξ±-Fe3+O(OH) |
| O | β Jarosite | KFe33+(SO4)2(OH)6 |
| O | β Quartz | SiO2 |
| Si | Silicon | |
| Si | β Quartz | SiO2 |
| S | Sulfur | |
| S | β Arsenopyrite | FeAsS |
| S | β Jarosite | KFe33+(SO4)2(OH)6 |
| S | β Pyrite | FeS2 |
| K | Potassium | |
| K | β Jarosite | KFe33+(SO4)2(OH)6 |
| Fe | Iron | |
| Fe | β Arsenopyrite | FeAsS |
| Fe | β Goethite | Ξ±-Fe3+O(OH) |
| Fe | β Jarosite | KFe33+(SO4)2(OH)6 |
| Fe | β Pyrite | FeS2 |
| As | Arsenic | |
| As | β Arsenopyrite | FeAsS |
Other Databases
| Link to USGS - Alaska: | MM054 |
|---|
Other Regions, Features and Areas containing this locality
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References
