Unnamed Prospect (ARDF - SR261; south shore of Marsha Bay), Prince William Sound Mining District, Valdez-Cordova Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
60° 19' 34'' North , 147° 41' 6'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: The prospect is located near tidewater on the south shore of Marsha Bay. It is in the NE1/4 section 27, T. 3 N., R. 10 E., of the Seward Meridian. This is location 106 of Cobb and Richter (1972), location 131 of MacKevett and Holloway (1977), location 215 of Tysdal (1978 [MF-880-A]), and location S-55 of Jansons and others (1984). This location is accurate to within a quarter of a mile.
Geology: The country rock in this area is greenstone of the Orca Group of early Teriary age (Nelson and others, 1985). The prospect consists of a 12-inch-wide, silicified, sheared greenstone containing disseminated pyrite and pyrrhotite with chalcopyrite blebs in the wallrock. Workings on the prospect consisted of two open cuts (Richter, 1965). A random chip sample from chalcopyrite-bearing greenstone contained 1.42 percent copper and 4.9 ppm silver (Kurtak and Jeske, 1986).
Workings: Workings on the prospect consist of two open cuts (Richter, 1965). A random chip sample from chalcopyrite-bearing greenstone contained 1.42 percent copper and 4.9 ppm silver (Kurtak and Jeske, 1986).
Age: Tertiary or younger; the occurrence is in rocks of the Orca Group of Tertiary age.
Alteration: Sheared greenstone at the prospect is silicified (Kurtak and Jeske, 1986).
Commodities (Major) - Cu; (Minor) - Ag
Development Status: None
Deposit Model: Cyprus massive sulfide (Cox and Singer, 1986; model 24a)
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.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| 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 |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
Other Databases
| Link to USGS - Alaska: | SR261 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Prince WilliamAccretionary Complex
- Yakutat-Malaspina DomainDomain
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