Unnamed Occurrence (ARDF - DE042), Stone Rock Bay, Prince of Wales Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
54° 46' 16'' North , 132° 0' 32'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Metlakatla | 1,405 (2017) | 48.4km |
Location: This occurrence is about 0.3 mile north of the northwest head of Stone Rock Bay, in the NW1/4 SW1/4 section 8, T. 82 S., R. 90 E.
Geology: The only work at this prospect is a few small pits on several claims. A network of quartz-hematite veins occurs in radioactive, altered andesite(?) dikes that cut Silurian or Ordovician syenite (MacKevett, 1963; Gehrels, 1992). The dikes are largely altered to chlorite and clay minerals and are cut by late-stage calcite veinlets that lack any radioactive minerals. Maas and others (1991) speculatively identified monazite in the quartz-hematite veinlets. They collected several samples of the dikes and syenite that contained up to 132 parts per billion gold, 0.27 percent copper, 331 parts per million (ppm) zinc, 1,080 ppm uranium, 1.44 percent cerium, 0.723 percent lanthanum, and 54 ppm yttrium. A sample nearby of silicified syenite with disseminated chalcopyrite contained 229 to 402 ppb gold and 3,162 to 6,206 ppm copper.
Workings: Only a few small prospecting pits.
Alteration: The radioactive dikes are almost completely altered to chlorite and clay minerals. Syenite nearby is silicified.
Commodities (Major) - Au, Ce, Cu, La, U; (Minor) - Y, Zn
Development Status: None
Deposit Model: U-REE-bearing dikes.
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.
Detailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ 'Chlorite Group' |
| ⓘ 'Clay minerals' |
| ⓘ Hematite Formula: Fe2O3 |
| ⓘ 'Monazite Group' Formula: REE(PO4) |
| ⓘ Quartz Formula: SiO2 |
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 | |||
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Unclassified | |||
| ⓘ | 'Chlorite Group' | - | |
| ⓘ | 'Clay minerals' | - | |
| ⓘ | 'Monazite Group' | - | REE(PO4) |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Monazite Group | REE(PO4) |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| P | Phosphorus | |
| P | ⓘ Monazite Group | REE(PO4) |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Hematite | Fe2O3 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
Other Databases
| Link to USGS - Alaska: | DE042 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Alexander DomainDomain
- Alexander TerraneVolcanic Arc
- Queen Charlotte basinBasin
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