Unnamed Occurrence (ARDF - UK006; east of Mt. Recheshnoi), Aleutians Mining District, Aleutians West Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - UK006; east of Mt. Recheshnoi) | - not defined - |
| Aleutians Mining District | Mining District |
| Aleutians West Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
53° 9' 0'' North , 168° 26' 23'' West
Latitude & Longitude (decimal):
Köppen climate type:
This site is located on land selected by the Aleut Native Corporation.
Location: This site is located near the southeast coast of central Umnak Island approximately 4 miles due east of Mt. Recheshnoit an elevation of about 1000 feet. It is in T. 81 S., R. 133 W., of the Seward Meridian The location is accurate to within 1/2 mile.
Geology: This site was reported as the Mt. Recheshnoi prospect by Randolph and Ellis (1989). The rocks consist of altered andesites of Late Tertiary to Quaternity age. The occurrence is a 500 x 2600 foot color anomaly which exhibits propylitic alteration and localized argillization. Quartz occurs both as individual veins and as stockworks. Most of the veins exhibit propylitization and pyritization envelopes up to several feet on either side. In one locality, noted by Randolph and Ellis, several inches of blue-gray pyritic clay envelops comb-structure quartz-filled joints. Six samples of clay muck and vein material contained up to 72 ppm arsenic, 186 ppb gold, 2.6 ppm mercury, 19 ppm molybdenum, and 4.7 ppm silver (Randolph and Ellis, 1989, p. 11).
Workings: Six samples of clay and quartz collected by Battle Mountain Exploration (Randolph and Ellis, 1989) contained up to 72 ppm arsenic, 186 ppb gold, 2.6 ppm mercury, 19 ppm molybdenum, and 4.7 ppm silver.
Age: Tertiary or younger.
Alteration: The rocks exhibit propylitization with local argillization.
Commodities (Major) - Ag, Au; (Minor) - As, Hg, Mo
Development Status: None
Deposit Model: Hot-spring Au-Ag? (Cox and Singer, 1986; model 25a)
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.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | 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 | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS - Alaska: | UK006 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Aleutian Trench basinBasin
- East Aleutian ArcVolcanic Arc
Pacific Ocean
- Bering SeaSea
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