Skypilot; Skypilot Ledge Occurrence, Prince William Sound Mining District, Valdez-Cordova Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Skypilot; Skypilot Ledge Occurrence | Occurrence |
| 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° 58' 59'' North , 148° 27' 0'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Whittier | 214 (2018) | 26.4km |
| Knik River | 744 (2011) | 58.5km |
Location: The occurrence is at an elevation of about 600 feet on the northwest side of Harriman Fiord, near the toe of Harriman Glacier. It is in the SE1/4 section 6, T. 10 N., R. 6 E., of the Seward Meridian. This is location 122 of Condon and Cass (1958), location 65 of Cobb and Richter (1972), location 79 of MacKevett and Holloway (1977), location 124 of Cobb and Tysdal (1980), and location S-154 of Jansons and others (1984). This location is accurate to within a quarter of a mile.
Geology: The occurrence consists of a 2- to 5-foot-wide quartz vein containing fault gouge. It is hosted in Valdez Group conglomerate and slate of Late Cretaceous age (Cobb and Tysdal, 1980). The vein strikes northwest and dips vertically and is traceable for 450 to 500 feet along strike. When crushed, the vein is said to pan gold (Johnson, 1914 [B 592-G, p. 229]). No other information is available.
Workings: There are no workings or assay results reported for this occurrence. Johnson (1914 [B 592-G, p. 229]) reports that the crushed ore pans free gold. The U.S. Bureau of Mines searched for this occurrence in 1981 but did not locate it (Hoekzema and Sherman, 1983). They examined similar veins about 1.5 miles to the southwest. No samples were collected.
Age: Cretaceous or younger; the vein cuts rocks of the Valdez Group of Late Cretaceous age.
Commodities (Major) - Au
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
2 valid minerals.
Detailed Mineral List:
| ⓘ Native Gold Formula: Au |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| 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 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS - Alaska: | SR068 |
|---|
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