Independence Prospect, Kupreanof Mining District, Petersburg Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Independence Prospect | Prospect |
| Kupreanof Mining District | Mining District |
| Petersburg Borough | Borough |
| Alaska | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
56° 32' 51'' North , 133° 2' 31'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Petersburg | 2,948 (2017) | 29.9km |
Mindat Locality ID:
198129
Long-form identifier:
mindat:1:2:198129:5
GUID (UUID V4):
8004fc7d-fd0d-42ca-9cf4-cff0aff64ba8
Location: The Independence prospect consists of a shaft and 12 cuts that extend for about 1,800 feet along a quartz vein. The coordinates are at the shaft which is at an elevation of about 500 feet, about 0.3 mile north-northwest of the north end of Harrys Lake on Woewodski Island. It is about 0.5 mile north of the center of section 35, T. 61 S., R. 79 E.
Geology: The Independence prospect was found sometime before 1931 (Nelson, 1931) and by 1933 consisted of 12 cuts and a shaft 10 to 20 feet deep along a vein that extended for about 2,000 feet (Still and others, 2002). Apparently there has been no later work specifically on this prospect although much of the center of Woewodski Island has been covered by claims since the 1970's and this prospect probably still is. The rocks in the vicinity are mainly felsic volcanic rocks of the Triassic Hyd Group (Brew, 1997, Karl and others, 1999). At the south end of the prospect, the volcanics are cut by Cretaceous hornblende diorite. The mineralization consist of a quartz vein up to 10 feet thick that strikes north and has been traced on the surface for about 2,000 feet. Still and others (2002) collected 8 samples from the pits along the vein and from the shaft dump. Six contained less than 5 parts per billion (ppb) gold, one contained 74 ppb gold, and one contained 94 ppb gold.
Workings: The Independence prospect was found sometime before 1931 (Nelson, 1931) and by 1933 consisted of 12 cuts and a shaft 10 to 20 feet deep along a vein that extended for about 2,000 feet (Still and others, 2002). Apparently there has been no later work specifically on this prospect although much of the center of Woewodski Island has been covered by claims since the 1970's and this prospect probably still is.
Age: Cretaceous or younger based on the age of the diorite host rock to the vein.
Alteration: None specifically noted.
Reserves: None.
Commodities (Major) - Au
Development Status: None
Deposit Model: 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.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | 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 | ⓘ Gold | Au |
Other Databases
| Link to USGS - Alaska: | PE099 |
|---|
Other Regions, Features and Areas containing this locality
North America
- Coast MountainsMountain Range
North America PlateTectonic Plate
- Alexander DomainDomain
USA
- Alaska
- ⭔Wrangell-Petersburg Census AreaBorough
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
References
