Unnamed Prospect (ARDF - CR091), Mount Miramar, Baker Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
55° 19' 14'' North , 133° 35' 16'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Mindat Locality ID:
202112
Long-form identifier:
mindat:1:2:202112:9
GUID (UUID V4):
132ccd4a-951d-444b-b68c-48469d7c07b5
Location: The location of this prospect is from an old, small-scale map that lacks topographic contours. For this record, the prospect is about 0.5 mile east of Mount Miramar near the center of section 32, T. 75 S., R. 78 E. The location is probably accurate to within 0.5 mile.
Geology: A silver-lead-zinc(-quartz?) vein in Silurian or Ordovician slate and argillite of the Descon Formation is exposed for nearly 300 feet along the south bank of a small creek and in old opencuts (Roehm, 1936 [PE 119-3]). The vein averages 18 to 24 inches thick and contains irregular masses of intergrown sphalerite and galena, with small amounts of pyrite and tetrahedrite. A sample across 22 inches of the vein contained a trace of gold, 9.20 ounces of silver per ton, 0.3 percent copper, 6.4 percent lead, and 15.3 percent zinc. A large Cretaceous granitic pluton crops out less than a mile to the south (Eberlein and others, 1983; Brew, 1996).
Workings: A few open cuts.
Age: May be related to the large Cretaceous granitic pluton to the south.
Commodities (Major) - Ag, Cu, Pb, Zn
Development Status: None
Deposit Model: Polymetallic vein (Cox and Singer, 1986; model 22c).
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:
| ⓘ Galena Formula: PbS |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Sphalerite Formula: ZnS |
| ⓘ 'Tetrahedrite Subgroup' Formula: Cu6(Cu4C2+2)Sb4S12S |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| ⓘ | 'Tetrahedrite Subgroup' | 2.GB.05 | Cu6(Cu4C2+2)Sb4S12S |
| 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 | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| S | ⓘ Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| Sb | Antimony | |
| Sb | ⓘ Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS - Alaska: | CR091 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Alexander DomainDomain
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References
