Unnamed Occurrence (ARDF - DE045), Security Cove, Dall Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
54° 44' 50'' North , 132° 51' 28'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Hydaburg | 391 (2017) | 51.2km |
Mindat Locality ID:
200685
Long-form identifier:
mindat:1:2:200685:0
GUID (UUID V4):
b686273e-4a16-4f31-954b-1cff6b69b916
Location: This occurrence, which was first sampled and described by Maas and others (1991), is near the tip of a small peninsula that juts out on the north side of Security Cove just inside its entrance. It is near the center of the east boundary of the NE1/4 section 21, T 82 S., R. 84 E.
Geology: The rocks in the vicinity of this occurrence are pre-Ordovician basaltic metavolcanic rocks, dacitic metavolcanic rocks, phyllite, and marble (Gehrels, 1991). As described by Maas and others (1991), the occurrence is a 20-foot zone with thin layers of pyrite 0.1 to 0.5 foot thick, interbedded with marble and chlorite schist. Their best sample across a 0.5-foot-thick layer of pyrite contained 357 parts per billion gold, 6.3 parts per million (ppm) silver, 2,885 ppm zinc, 1,103 ppm arsenic, and 2.3 percent barite. The pyrite layers apparently do not continue to the south across Security Cove.
Workings: Only sampling by government geologists.
Age: Probably contemporaneous with the pre-Ordovician host rocks.
Commodities (Major) - Ag, Ba, Zn; (Minor) - As, Au
Development Status: None
Deposit Model: Probably a Kuroko massive-sulfide-type deposit (Cox and Singer, 1986; model 28a
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsGallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
Other Databases
| Link to USGS - Alaska: | DE045 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Alexander DomainDomain
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
