Unnamed Prospect (ARDF - BC094; near mouth of Harding River), Petersburg Mining District, Wrangell City and Bourough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Prospect (ARDF - BC094; near mouth of Harding River) | - not defined - |
| Petersburg Mining District | Mining District |
| Wrangell City and Bourough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
56° 12' 9'' North , 131° 38' 16'' West
Latitude & Longitude (decimal):
KΓΆppen climate type:
Mindat Locality ID:
202093
Long-form identifier:
mindat:1:2:202093:1
GUID (UUID V4):
92e7a5aa-1b56-45f2-a307-a9cd3cc7d51e
Location: This prospect is at an elevation of about 40 feet on the west side of a small bight about 0.7 mile west-southwest of the mouth of the Harding River on Bradfield Canal. It is about 0.3 mile southwest of the center of section 27, T. 69 S., R. 89 E. The location is accurate.
Geology: As first described by Roehm (1942) and sampled by Still and others (2002), this prospect is an old opencut and probably the best mineralization in the several shear zones along Bradfield Canal in this area. The prospect is near the contact zone between the Eocene Coast Mountains batholith and metamorphic rocks . As described by Roehm (1942), the shear zone at this open cut has a hanging wall of mica schist or gneiss and a footwall of marble. A quartz vein about 0.5 to 1 foot thick occurs along the shear for about 20 feet of the opencut. The vein contains 1 to 2 percent sulfides, mainly pyrrhotite with pyrite and chalcopyrite. Still and others (2002) collected several samples; the highest values were 17 parts per billion gold, 1.8 part per million (ppm) silver, 197 ppm copper, and 235 ppm zinc.
Workings: A short opencut was dug before 1942 and there was limited sampling by government geologists about 2000.
Reserves: None.
Commodities (Major) - Ag, Au, Cu, Zn
Development Status: None
Deposit Model: Quartz vein with low values of gold, silver, copper, and zinc.
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
4 valid minerals.
Detailed Mineral List:
| β Chalcopyrite Formula: CuFeS2 |
| β Pyrite Formula: FeS2 |
| β Pyrrhotite Formula: Fe1-xS |
| β Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| β | Chalcopyrite | 2.CB.10a | CuFeS2 |
| β | Pyrrhotite | 2.CC.10 | Fe1-xS |
| β | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| β | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | β Quartz | SiO2 |
| Si | Silicon | |
| Si | β Quartz | SiO2 |
| S | Sulfur | |
| S | β Chalcopyrite | CuFeS2 |
| S | β Pyrite | FeS2 |
| S | β Pyrrhotite | Fe1-xS |
| Fe | Iron | |
| Fe | β Chalcopyrite | CuFeS2 |
| Fe | β Pyrite | FeS2 |
| Fe | β Pyrrhotite | Fe1-xS |
| Cu | Copper | |
| Cu | β Chalcopyrite | CuFeS2 |
Other Databases
| Link to USGS - Alaska: | BC094 |
|---|
Other Regions, Features and Areas containing this locality
North America
- Coast MountainsMountain Range
North America PlateTectonic Plate
- Taku DomainDomain
USA
- Alaska
- ⭔Wrangell-Petersburg Census AreaBorough
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References
