Minnie Prospect, Prince William Sound Mining District, Valdez-Cordova Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Minnie 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° 13' 52'' North , 147° 45' 36'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Location: The prospect is located at about 700 feet elevation about one-half mile east of the head of Northeast Arm, Mummy Bay. It is in the SW1/4 section 29, T. 2 N., R. 10 E., of the Seward Meridian. This is location 250 of Tysdal (1978 [MF-880-A]) and location S-30 of Jansons and others (1984). This location is accurate to within a quarter of a mile.
Geology: The country rock is greenstone of the Orca Group of early Teriary age (Kurtak and Jeske, 1986). The prospect consists of a 145-foot-long adit driven along a north-trending shear zone. The shear zone is 2 to 3 feet wide and dips 80E. The mineralization consists of massive chalcopyrite stringers with some quartz veins containing disseminated chalcopyrite (Kurtak and Jeske, 1986). As much as 1 percent native copper was identified in parts of the shear (Johnson, 1915). Two chip samples, each 3 feet wide, were collected from the adit. The samples contained 300 ppm and 0.25 percent copper, respectively (Kurtak and Jeske, 1986).
Workings: The workings on the prospect consist of a single south-trending adit that is 145 feet long. It is at an elevation of 700 feet. Two 3-foot-wide chip samples from the adit contained 300 ppm and 0.25 percent copper, respectively (Kurtak and Jeske, 1986).
Age: Tertiary or younger; the mineralization is in rocks of the Orca Group of Tertiary age.
Reserves: The U.S. Bureau of Mines estimated inferred reserves of 200 tons of ore at a grade of 0.25 percent copper (Kurtak and Jeske, 1986).
Commodities (Major) - Cu
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.
Detailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Native Copper Formula: Cu |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Copper | 1.AA.05 | Cu |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| 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 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Native Copper | Cu |
Other Databases
| Link to USGS - Alaska: | SR326 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Prince WilliamAccretionary Complex
- Yakutat-Malaspina DomainDomain
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