Unnamed Prospect (ARDF - CR145), Flat Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Prospect (ARDF - CR145) | - not defined - |
| Flat 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° 5' 26'' North , 132° 41' 38'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This prospect reportedly is near the east shoreline of central Flat Island, in section 24, T. 78 S., R. 84 E.
Geology: Bufvers (1967) reports that a rich quartz vein was found on the beach at this site, probably in the late 1880's. Too much powder was used to expose it and most of the gold was blasted into the water. A few thousand dollars in gold was said to have been recovered. Maas and others (1991) searched for this prospect without success, but did find several slightly mineralized quartz veins in the area. The best of these, a sample from Blanket Island with chalcopyrite in the quartz, contained 1,734 parts per million copper and no gold. The rocks in the area are basalt and andesite of Silurian or Ordovician age (Eberlein and others, 1983; Brew, 1996).
Workings: Some gold was said to be have produced from unspecified, probably surface workings, probably in the 1880's.
Age: Unknown other than that the prospect is in Silurian or Ordovician rocks.
Production: A few thousand dollars in gold (at $20.67 per ounce?) was said to have been recovered in the 1880's.
Reserves: None.
Commodities (Major) - Au, Cu
Development Status: Yes; small
Deposit Model: Gold-quartz vein (Cox and Singer, 1986; model 36a).
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 |
| ⓘ 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 | |||
| ⓘ | 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 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
Other Databases
| Link to USGS - Alaska: | CR145 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Alexander DomainDomain
- Alexander TerraneVolcanic Arc
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