Dunklee and Reilly; Black Bear; Yellow Horse Prospect, Prince William Sound Mining District, Valdez-Cordova Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Dunklee and Reilly; Black Bear; Yellow Horse Prospect | Prospect |
| Prince William Sound Mining District | Mining District |
| Valdez-Cordova Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
60° 52' 27'' North , 148° 24' 18'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Whittier | 214 (2018) | 18.8km |
Location: The prospect is located on the north side of the Pigot Glacier valley at an elevation of 700 feet elevation. It is in the NW1/4 section 16, T. 9 N., R. 6 E., of the Seward Meridian. This is location 129 of Condon and Cass (1958), location 60 of Cobb and Richter (1972), location 86 of MacKevett and Holloway (1977), location 136 of Cobb and Tysdal (1980), and location S-164 of Jansons and others (1984). This location is accurate to within a quarter of a mile.
Geology: The country rock at this prospect is an argillite of the Valdez Group of Late Cretaceous age that is cut by felsic dikes of probable Eocene age (Nelson and others, 1985). The prospect consists of a 5-foot adit along a single quartz vein in a small well-defined fault that strikes S63W dip 60N. The vein is traceable for about 250 feet along strike and is from 1 to 24 inches wide with an average width of 6 inches (Johnson, 1914 [B 592-G, p. 233]). The vein consists of quartz and calcite, along with chalcopyrite, arsenopyrite, galena, sphalerite, and gold. The vein is banded parallel to its walls, and some gouge is present.
Workings: The prospect was discovered in 1913. Development that summer included surface stripping and a 5-foot adit (Johnson, 1914 [B 592-g, p. 233]). No assay results are reported. The U.S. Bureau of Mines searched for the prospect in 1981 but did not locate it (Hoekzema and Sherman, 1983).
Age: Eocene or younger; the fault and the vein cut Eocene dikes.
Commodities (Major) - Au; (Minor) - Cu, Pb, Zn
Development Status: None
Deposit Model: Low-sulfide Au-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
8 valid minerals.
Detailed Mineral List:
| ⓘ Arsenopyrite Formula: FeAsS |
| ⓘ Calcite Formula: CaCO3 |
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Galena Formula: PbS |
| ⓘ Gold Formula: Au |
| ⓘ Pyrrhotite Formula: Fe1-xS |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
List of minerals for each chemical element
| C | Carbon | |
|---|---|---|
| C | ⓘ Calcite | CaCO3 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Arsenopyrite | FeAsS |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrrhotite | Fe1-xS |
| S | ⓘ Sphalerite | ZnS |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Fe | Iron | |
| Fe | ⓘ Arsenopyrite | FeAsS |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrrhotite | Fe1-xS |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| As | Arsenic | |
| As | ⓘ Arsenopyrite | FeAsS |
| Au | Gold | |
| Au | ⓘ Gold | Au |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS - Alaska: | SR070 |
|---|
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