Nicirque Prospect, Kupreanof Island, Petersburg Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Nicirque Prospect | Prospect |
| Kupreanof Island | Island |
| Petersburg Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
56° 38' 48'' North , 133° 1' 40'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Petersburg | 2,948 (2017) | 18.9km |
Location: The Nicirque prospect is about 2.5 miles northeast of Grief Island in Duncan Canal at an elevation of about 2,300 feet. It is about 0.4 mile north-northeast of the center of section 30, T. 60 S., R. 59 E. The location is accurate to within one-quarter mile.
Geology: The Nicirque prospect was staked in 1993 and was active at least as recently as 1998 (Still and others, 2002). It is near the fault contact of the Permian and Mississippian Cannery Formation with volcanic and sedimentary rocks of the Triassic Hyd Group (Karl and others, 1999).
A fossil find at the prospect indicates that it may be in slate of Hyd Group. The mineralization is reportedly a massive pyrite vein in a breccia zone. Still and others (2002) collected a sample across three feet of slate with pyrite bands. The sample contained 56 parts per billion gold, 2.6 parts per million (ppm) silver, and 333 ppm zinc.
Workings: There is no record of work at this prospect other than that it was first staked in 1983 and that the Bureau of Land Management examined the it and collected a sample.
Age: Possibly Triassic based on the age of the host rock.
Commodities (Major) - Ag, Au, Zn
Development Status: None
Deposit Model: Pyrite bands in slate.
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: | PE088 |
|---|
Other Regions, Features and Areas containing this locality
North America
- Coast MountainsMountain Range
North America PlateTectonic Plate
- Alexander DomainDomain
- Alexander TerraneVolcanic Arc
USA
- Alaska
- Petersburg Borough
- Kupreanof Mining DistrictMining District
- ⭔Wrangell-Petersburg Census AreaBorough
- Petersburg Borough
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