Apex Prospect, Chichagof Mining District (Chicagof Mining District), Sitka, Alaska, USAi
| Regional Level Types | |
|---|---|
| Apex Prospect | Prospect |
| Chichagof Mining District (Chicagof Mining District) | Mining District |
| Sitka | City Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
57° 0' 49'' North , 135° 11' 20'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Sitka | 8,863 (2017) | 9.6km |
Location: The Apex prospect is at an elevation of about 600 feet on the west side of Silver Bay opposite Bear Cove. The prospect is 0.1 mile east of the center of sec. 14, T. 56 S., R. 64 E. It is location P-120 of Bittenbender and others (1999) and MAS no. 0021140162 (U.S. Bureau of Land Management, 2002). The location is accurate within 0.2 mile.
Geology: The rocks in the vicinity of the Apex prospect are part of the Jurassic and Cretaceous, Sitka Graywacke that consists mainly of graywacke and argillite (Loney and others, 1975). The location of the Apex prospect is shown on a map by Becker (1898) but it is not described in the text. The prospect was examined by Bittenbender and others (1999) who found abundant quartz float in a creek and a quartz breccia vein along a fault. The only working was an 8-foot adit along the fault. The vein strikes N30W, dips 75SW, is up to 1.7 feet thick, and contains arsenopyrite and trace chalcopyrite. A sample across the vein contained 270 parts per million (ppm) copper, 44 ppm arsenic, and 0.2 ppm silver. A select sample of the quartz float contained 920 ppm copper and 1.0 ppm silver. The highest gold values in any of the samples was 40 parts per billion.
Workings: The only working is an old 8-foot adit.
Age: Jurassic or younger based on the age of the host rock.
Production: Probably none.
Commodities (Major) - Ag, Au, Cu
Development Status: None
Deposit Model: Low-sulfide 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
3 valid minerals.
Detailed Mineral List:
| ⓘ Arsenopyrite Formula: FeAsS |
| ⓘ 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 |
| ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
| 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 | ⓘ Arsenopyrite | FeAsS |
| S | ⓘ Chalcopyrite | CuFeS2 |
| Fe | Iron | |
| Fe | ⓘ Arsenopyrite | FeAsS |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| As | Arsenic | |
| As | ⓘ Arsenopyrite | FeAsS |
Other Databases
| Link to USGS - Alaska: | SI186 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Chugach DomainAccretionary Complex
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