Stebbins Prospects and unnamed prospects, Percy Island group, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Stebbins Prospects and unnamed prospects | Group of Prospects |
| Percy Island group | - not defined - |
| Ketchikan Mining District | Mining District |
| Prince of Wales-Hyder Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
54° 57' 2'' North , 131° 35' 30'' West
Latitude & Longitude (decimal):
Type:
Group of Prospects
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Metlakatla | 1,405 (2017) | 19.8km |
| Saxman | 417 (2017) | 40.8km |
| Ketchikan | 8,197 (2017) | 43.6km |
Location: This site represents the locations of three prospects for iron minerals in ultramafic rocks on the the Percy Islands (Sec 8, T. 80 S., R. 92 E., of the Copper River Meridian), Cow Island (Sec 5, T. 80 S., R. 92 E., of the Copper River Meridian), and an adjacent island (Stebbins, Sec 7, T. 80 S., R. 92 E.) for which there either are U.S. Bureau of Mines (1974) claim records, or other published descriptions (Taylor and Noble, 1960; Elliott and others, 1978, locs. 156-158; Cobb and Elliott, 1980, p. 141). The coordinates are for the approximate center of the estimated 6-square-mile outcrop area of the ultramafic rocks and are accurate within about 0.1 mile.
Geology: The Percy Islands, Cow Island, and adjacent islands (Taylor and Noble, 1960, p. 181; Berg and others, 1988) are underlain by metamorphosed undivided Silurian or Ordovician intermediate and mafic intrusive rocks, and by a Cretaceous ultramafic complex, which intrudes the metamorphic rocks. The ultramafic complex consists of olivine pyroxenite with a border zone of hornblende pyroxenite, which in turn is surrounded by gabbro. The hornblende pyroxenite contains titaniferous magnetite, whose abundance and distribution probably is similar to that on Duke Island (ARDF PR001). A prospect on the Percy Islands has been drilled by private interests, but no data on potential iron resources have been made public.
Workings: A prospect on the Percy Islands has been drilled by private interests, but no data on potential iron resources have been made public.
Age: Cretaceous
Commodities (Major) - Fe
Development Status: No
Deposit Model: Alaska PGE (Cox and Singer, 1986; model 9)
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.
Detailed Mineral List:
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 |
| ⓘ Magnetite var. Titanium-bearing Magnetite Formula: Fe2+(Fe3+,Ti)2O4 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| ⓘ | var. Titanium-bearing Magnetite | 4.BB.05 | Fe2+(Fe3+,Ti)2O4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| O | ⓘ Magnetite var. Titanium-bearing Magnetite | Fe2+(Fe3+,Ti)2O4 |
| Ti | Titanium | |
| Ti | ⓘ Magnetite var. Titanium-bearing Magnetite | Fe2+(Fe3+,Ti)2O4 |
| Fe | Iron | |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Fe | ⓘ Magnetite var. Titanium-bearing Magnetite | Fe2+(Fe3+,Ti)2O4 |
Other Databases
| Link to USGS - Alaska: | PR002 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Alexander DomainDomain
- Alexander TerraneVolcanic Arc
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