Ranger Prospect, South Prince of Wales Wilderness, Prince of Wales Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
54° 49' 17'' North , 132° 18' 10'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
This prospect is in the South Prince of Wales Wilderness, which is closed to prospecting and mineral exploration.
Location: The Ranger prospect is at an elevation of about 500 feet, 1.3 miles south to south-southeast from southeast tip of Tah Island. It is about 0.4 mile northwest of the center of section 29, T. 81 S., R. 88 E. The location is accurate.
Geology: A major fault in the area juxtaposes sandstone of the Devonian Karheen Formation to the west against Ordovician diorite to the east (Gehrels, 1992). In 1918, Chapin described the Ranger prospect as an outcrop of magnetite up to 25 feet across that locally contains chalcopyrite. The country rock is greenstone (probably fine-grained granodiorite or volcanic rock), tuff, volcanic breccia, graywacke, and grit; the greenstone is cut by many granitic dikes and quartz veins. The prospect was restaked in the early 1950's. Glover (1954 [MI 121-1]) describes the deposit as a body of magnetite about 10 by 15 feet in outcrop area. The original discovery, on which a short tunnel was driven early in the 20th century, was located about 100 feet north of the magnetite body staked in the 1950's. Glover also found several other lenses and pods of magnetite in greenstone, none of which was of substantial size. He found no chalcopyrite in any of the magnetite bodies. The greenstone porphyry in the vicinity is mildly radioactive, averaging about 0.005 percent eU.
Workings: The prospect was explored by a 10-foot adit and some surface clearing prior to 1918. A magnetite body nearby was restaked in the 1950's.
Commodities (Major) - Cu
Development Status: None
Deposit Model: Chalcopyrite(?) in magnetite body.
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
2 valid minerals.
Detailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
Other Databases
| Link to USGS - Alaska: | DE034 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Alexander DomainDomain
- Alexander TerraneVolcanic Arc
- Queen Charlotte basinBasin
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