Kangik River Occurrence, Bering Sea Mining District, Nome Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Kangik River Occurrence | Occurrence |
| Bering Sea Mining District | Mining District |
| Nome Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 34' 11'' North , 171° 43' 11'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Gambell | 701 (2017) | 23.3km |
Location: Kangik River flows northeast into Aghnaghak Lagoon on the northwest coast of St. Lawrence Island. This site is in hornfels peripheral to the east side of the Sevuokuk pluton, 4.5 miles northeast of Vngyat Point' (Patton and Csejtey, 1971, p. C15). The site, probably located within 0.5 miles, is apparently on the Kangik River. This is locality 2 of Cobb (1972) and Cobb (1980) summarized relevant references under the name 'Kangik R.'.
Geology: A small amount of native copper was found in float of a mafic volcanic hornfels 4 1/2 miles northeast of Vngyat Point (Patton and Cjestey, 1971, p. C15). The hornfels is apparently in the east contact zone of the Sevuokuk pluton. The Sevuokuk pluton is an elongate and composite intrusion that makes up the western coastal headlands of St. Lawrence Island (Patton and Csejtey, 1980). It includes biotite hornblende quartz monzonite and biotite quartz monzonite phases (Csejtey, Patton, and Miller, 1971). The copper-bearing hornfels occurrence is apparently in the contact zone of a biotite hornblende quartz monzonite phase where it intrudes a Cretaceous volcanic assemblage of diverse lithologies and compositions. One K/Ar age determination for the Sevuokuk pluton gave an age of 108 +/- 3.2 Ma (Patton and Csejtey, 1980).
Workings: None
Age: Mid-Cretaceous, the age of the Sevuokuk pluton (108 +/- 3.2 Ma; Patton and Csejtey, 1980)
Alteration: The Cretaceous volcanic assemblage is thermally metamorphosed to hornblende hornfels and albite-epidote hornfels facies where it is in contact with granitic rocks but elsewhere it is commonly propylitically altered (Patton and Csejtey, 1980).
Commodities (Major) - Cu
Development Status: None
Deposit Model: Copper-bearing replacements in hornfels.
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.
Detailed Mineral List:
| ⓘ Native Copper Formula: Cu |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Copper | 1.AA.05 | Cu |
List of minerals for each chemical element
| Cu | Copper | |
|---|---|---|
| Cu | ⓘ Native Copper | Cu |
Other Databases
| Link to USGS - Alaska: | SL003 |
|---|
Other Regions, Features and Areas containing this locality
Eurasian Plate
- Verkhoyansk Kolyma
- Taigonos ArcVolcanic Arc
North AmericaContinent
North America PlateTectonic Plate
Pacific Ocean
- Bering SeaSea
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