Nancy Prospect, Prince of Wales Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Nancy Prospect | Prospect |
| Prince of Wales Island | Island |
| Ketchikan Mining District | Mining District |
| Prince of Wales-Hyder Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
55° 20' 59'' North , 132° 48' 7'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Hydaburg | 391 (2017) | 15.9km |
| Hollis | 112 (2011) | 25.3km |
| Craig | 1,248 (2017) | 26.0km |
| Klawock | 765 (2017) | 29.1km |
| Thorne Bay | 483 (2017) | 41.5km |
Location: The location of this old prospect, which is described only by Chapin (1916), is not known precisely. It probably is about midway between the heads of Trocadero Bay and Twelvemile Arm, within a mile of the center of the SE1/4 section 21, T. 75 S., R. 83 E.
Geology: The Nancy prospect is in greenstone interbedded with argillite and conglomerate (Chapin, 1916). The rocks are part of the Descon Formation of Silurian and Ordovician age (Eberlein and others, 1983; Brew, 1996). The deposit consists of a shear zone 25 feet wide that contains silicified greenstone with pyrite and chalcopyrite. Some quartz stringers also contain pyrite and chalcopyrite. A quartz vein 6 feet thick strikes N70E and dips 45NW. The only workings are shallow trenches.
Workings: Only surface trenching.
Age: Unknown, other than that the deposit is in Silurian and Ordovician rocks.
Alteration: Greenstone in a mineralized shear zone is silicified.
Commodities (Major) - Cu
Development Status: None
Deposit Model: Shear zone with chalcopyrite and pyrite.
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: | CR107 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Alexander DomainDomain
- Alexander TerraneVolcanic Arc
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