Antonette occurrence, Aleutians East Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Antonette occurrence | Occurrence |
| Aleutians East Borough | Borough |
| Alaska | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
55° 15' 20'' North , 160° 38' 56'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Sand Point | 1,064 (2017) | 13.1km |
This prospect is located on land patented by, or interim-conveyed to, the Aleut Corporation.
Location: The Antonette prospect, on northwestern Unga Island, is at an elevation of about 1,100 feet, in the SW1/4 of sec. 10, T. 57 S., R. 75 W., Seward Meridian. The location is accurate to within 2,500 feet.
Geology: The rocks at this site are a sequence of rhyolitic lavas and ash-flow tuffs that have been brecciated, pyritized, silicified, and argillized (Peterson and others, 1982). They are part of the Eocene to Oligocene Popof volcanic rocks (Wilson and others, 1995). The exposed alteration is vertically zoned upward from silicification and pyritization to argillization. Four samples contained as much as 0.309 ppm gold, 1.03 ppm silver, 79 ppm copper, 25 ppm lead, 32 ppm zinc, 990 ppm arsenic, and 2.55 ppm mercury (Peterson and others, 1982).
Workings: Four rock samples collected in 1982 by UNC Teton Exploration Drilling Company contained as much as 0.309 ppm gold, 1.03 ppm silver, 79 ppm copper, 25 ppm lead, 32 ppm zinc, 990 ppm arsenic, and 2.55 ppm mercury (Peterson and others, 1982).
Age: Eocene or younger.
Alteration: The rocks exhibit silicification, pyritization, and argillization.
Commodities (Major) - Ag, Au; (Minor) - As, Cu, Hg, Pb, Zn
Development Status: None
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
1 valid mineral.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
Other Databases
| Link to USGS - Alaska: | PM058 |
|---|
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
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
