Unnamed Occurrence (ARDF - KC183), Kwain Bay, Annette Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
55° 4' 1'' North , 131° 21' 3'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Metlakatla | 1,405 (2017) | 15.8km |
Saxman | 417 (2017) | 32.0km |
Ketchikan | 8,197 (2017) | 35.9km |
Mindat Locality ID:
200993
Long-form identifier:
mindat:1:2:200993:6
GUID (UUID V4):
a20132bf-b62f-4e7d-a07c-0140bfd90823
Location: This site represents two occurrences at sea level on the southeast coast of Annette Island, about 1.5 miles south of the mouth of Kwain Bay. The occurrences are about 0.1 mile apart, in section 35, T. 78 S., R. 93 E., of the Copper River Meridian. The map site is approximately midway between the occurrences. The site corresponds to loc. 6 in Berg (1972 [I 684]), and loc. 38a, b in Karl (1992). The location is accurate within 0.1 mile.
Geology: The country rocks in the area of this site are undivided, metamorphosed Silurian and Ordovician volcanic, sedimentary, and intrusive rocks; and Silurian trondhjemite that intrudes the Silurian and Ordovician rocks (Berg, 1972, Berg and others, 1988). The rocks were regionally metamorphosed to greenschist-grade phyllite and semischist in Late Cretaceous time. The occurrences consist of veinlets and disseminations of magnetite in shear zones in sericitized granitic rocks and schist. A sample of altered granitic rock contained 150 ppm Co and 20 ppm Mo (Karl, 1992, loc. 38a, b).
Workings: A sample of altered granitic rock contained 150 ppm Co and 20 ppm Mo (Karl, 1992, loc. 38a, b).
Age: Probably Late Cretaceous or younger.
Alteration: Sericitization of sheared granitic rocks.
Commodities (Major) - Fe; (Minor) - Co, Mo
Development Status: None
Deposit Model: Disseminated magnetite mineralization of undetermined origin.
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
1 valid mineral.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 4 - Oxides and Hydroxides | |||
---|---|---|---|
ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
List of minerals for each chemical element
O | Oxygen | |
---|---|---|
O | ⓘ Magnetite | Fe2+Fe23+O4 |
Fe | Iron | |
Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
Other Databases
Link to USGS - Alaska: | KC183 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Alexander DomainDomain
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