Unnamed Occurrence (ARDF - PM050; southwest of head of Zachary Bay), Aleutians East Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - PM050; southwest of head of Zachary Bay) | - not defined - |
| Aleutians East Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
55° 17' 2'' North , 160° 42' 25'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Sand Point | 1,064 (2017) | 14.4km |
This site is located on land patented by, or interim-conveyed to, the Aleut Corporation.
Location: This occurrence is located on Unga Island about 1.5 miles southwest of the head of Zachary Bay (Christie, 1974, color anomaly 83). The map site is at an elevation of about 1,350 feet, 0.4 mile southeast of the top of hill 2283. The locality is accurate to within 2,500 feet.
Geology: This site represents a color anomaly 1,500 by 6,000 feet (Christie, 1974, number 83), in Tertiary diorite, dacite, and hornfels (Wilson and others, 1995). Coarse clots and disseminations of pyrite occur in the diorite and dacite. Hornfels at a diorite contact contains disseminations and fracture fillings of chalcopyrite and magnetite exposed in a 200- by 200-foot area. Samples of this rock contained up to 0.3 percent copper. Christie (1974) also reported a pyritic stockwork containing 500 ppm copper. One sample of this stockwork assayed 0.06 ppm gold.
Workings: The Aleut-Quintana-Duval joint venture examined and sampled the occurrence in 1974 (Christie, 1974).
Age: Tertiary.
Commodities (Major) - Cu
Development Status: None
Deposit Model: Porphyry Cu; Porphyry Cu-Au (Cox and Singer; 1986; models 17 and 20c)
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 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | 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 | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
Other Databases
| Link to USGS - Alaska: | PM050 |
|---|
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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