Unnamed Occurrence (ARDF - JU015; near terminus of Casement Glacier), Glacier Bay Mining District, Juneau Mining District, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - JU015; near terminus of Casement Glacier) | - not defined - |
| Glacier Bay Mining District | - not defined - |
| Juneau Mining District | Mining District |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
58° 55' 27'' North , 135° 57' 50'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is at an elevation of about 300 feet, approximately 3.5 miles southwest of Snow Dome and 3 miles north of Adams Inlet. It is near the terminus of Casement Glacier in the NE1/4 section 18, T. 34 S., R. 57 E. of the Copper River Meridian. The location is accurate within 1/4 mile.
Geology: The rocks in the vicinity of this occurrence are predominantly Silurian and Devonian graywacke and argillite, and nonfoliated, Tertiary felsic granitic rocks and migmatite. Foliated, Cretaceous intermediate granitic plutons and migmatite crop out south of the occurrence (Brew and others, 1978). At the occurrence, altered zones 5 to 30 feet thick cut granitic rock near hornfels at the contact. The altered zones contain pyrite. A composite sample of altered rock contained 500 ppm copper and 5 ppm molybdenum (MacKevett and others, 1971). The rocks in the vicinity of this occurrence are deformed and metamorphosed Silurian or Devonian carbonate, clastic and volcanic clastic rocks that have been intruded by Upper Jurassic and Lower Cretaceous granitic and dioritic rocks (Brew and others, 1992).
Age: Tertiary.
Alteration: Hornfelsing and iron-staining.
Commodities (Major) - Cu
Development Status: None
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 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
Other Databases
| Link to USGS - Alaska: | JU015 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Coast MountainsMountain Range
North America PlateTectonic Plate
- Alexander DomainDomain
- Alexander TerraneVolcanic Arc
USA
- Alaska
- Juneau Mining DistrictMining District
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