Unnamed Occurrence (ARDF - SD020; west of Mount Sumdum), Petersburg Mining District, Hoonah-Angoon Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - SD020; west of Mount Sumdum) | - not defined - |
| Petersburg Mining District | Mining District |
| Hoonah-Angoon Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
57° 48' 29'' North , 133° 29' 9'' West
Latitude & Longitude (decimal):
Köppen climate type:
The occurrence is in the Tracy Arm-Fords Terror Wilderness Area which is closed to mineral exploration and mining.
Location: This occurrence is about 1.8 miles west of Mount Sumdum at an elevation of about 4,000 feet. It is about 0.2 mile east of the center of section 7, T. 47 S., R. 74 E.
Geology: This occurrence consists of a quartz vein in Cretaceous gneiss near its contact with Tertiary or Cretaceous tonalite (Brew and Grybeck, 1984; Kimble and others, 1984). A 0.8-foot channel sample across the vein contained 30 parts per million silver.
Age: Probably Cretaceous or younger based on the age of the host rock.
Commodities (Major) - Ag
Deposit Model: Silver in quartz vein.
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 | |||
|---|---|---|---|
| ⓘ | Quartz | 4.DA.05 | SiO2 |
Other Databases
| Link to USGS - Alaska: | SD020 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Coast MountainsMountain Range
North America PlateTectonic Plate
- Taku DomainDomain
- Yukon-TananaVolcanic Arc
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