Unnamed Occurrence (ARDF - PM054; south of Zachary Bay), Aleutians East Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - PM054; south of Zachary Bay) | - not defined - |
| Aleutians East Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
55° 16' 22'' North , 160° 39' 43'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Sand Point | 1,064 (2017) | 12.5km |
This occurrence is located on land patented by, or interim-conveyed to, the Aleut Corporation.
Location: This occurrence is located approximately 3.5 miles southeast of the head of Zachary Bay on Unga Island (Wilson and others, 1988, locality 26). The map site is at an elevation of 900 feet, in the SW1/4 of sec. 11, T. 57 S., R. 75 W., of the Seward Meridian. The location is accurate to within 1,200 feet.
Geology: At this site, Resource Associates of Alaska in 1981 located a 50-foot-wide zone of brecciated, silicified, pyritic andesite that may be a breccia pipe (Trujillo and others, 1981). The breccia fragments are in-filled by chalcopyrite, sphalerite, and galena over a 35-foot width of the zone. One sample of mineralized rock assayed 1.09 ounces of silver per ton, 2.07 percent zinc, and 0.58 percent lead. The country rocks are mapped as late Eocene to early Oligocene Popof volcanic rocks (Wilson and others, 1995).
Workings: One mineralized rock sample collected by Resource Associates of Alaska assayed 1.09 ounces of silver per ton, 2.07 percent zinc, and 0.58 percent lead.
Age: Eocene or younger.
Alteration: The mineralization is accompanied by strong silicification.
Commodities (Major) - Ag, Pb, Zn; (Minor) - Cu
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
3 valid minerals.
Detailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Galena Formula: PbS |
| ⓘ Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Galena | 2.CD.10 | PbS |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Galena | PbS |
| S | ⓘ Sphalerite | ZnS |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS - Alaska: | PM054 |
|---|
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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