Dave's Vein Prospect, Aleutians East Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Dave's Vein Prospect | Prospect |
| Aleutians East Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
55° 11' 9'' North , 160° 40' 30'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Sand Point | 1,064 (2017) | 20.1km |
This site is located on land patented by, or interim-conveyed to, the Aleut Corporation.
Location: The map site of this prospect is at an elevation of about 300 feet, just above the beach on the east shore of Acheredin Bay on Unga Island (Wilson and others, 1988, locality 39). The site is about 0.15 mile south-southwest of hill 710. The location is accurate to within 1,000 feet.
Geology: This prospect, discovered, mapped, and sampled in 1980 by Resource Associates of Alaska, consists of a 6-foot-wide, northeast-striking, iron-stained quartz vein in argillized, silicified, and pyritized andesite. The andesite is part of the late Eocene to early Oligocene Popof volcanic rocks (Wilson and others, 1995). The vein is exposed for 200 feet along strike and is associated with a knob of silicified andesite. It may merge with the Altair vein (PM091) farther inland. In 1982 UNC Teton Exploration Drilling Company conducted a VLF-EM survey, and trenched and sampled the prospect. Ranges of metal values from trench channel samples are as follows: 0.025 to 0.17 ppm gold, 0.5 to 4.2 ppm silver, 4 to 24 ppm copper, 5 to 36 ppm lead, 1 to 20 ppm zinc, 16 to 152 ppm arsenic, and 0.06 to 0.6 ppm mercury (Peterson and others, 1982).
Workings: In 1980 Resource Associates of Alaska mapped and sampled the prospect. In 1982 UNC Teton Exploration Drilling Company cut 168 feet of trench, sampled the prospect, and conducted a VLF-EM survey. Twelve trench channel samples assayed as much as 0.17 ppm gold and 4.2 ppm silver over a 120-foot zone. Thirteen grab samples assayed as much as 1.8 ppm gold and 210 ppm silver.
Age: Eocene or younger.
Alteration: The wall rock exhibits strong argillic alteration accompanied by pyrite. Some silicification has also been noted (Peterson and others, 1982).
Commodities (Major) - Ag, Au
Development Status: None
Deposit Model: Epithermal gold vein
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.
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 |
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: | PM071 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Chugach DomainAccretionary Complex
- East Aleutian ArcVolcanic Arc
USA
- Alaska
- Alaska Peninsula Mining DistrictMining District
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