Unnamed Occurrence (ARDF - SI015; north end of Yakobi Island), Chichagof Mining District (Chicagof Mining District), Hoonah-Angoon Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
57° 58' 31'' North , 136° 17' 49'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is at an elevation of about 500 feet on northwest Chichagof Island, about 1.7 miles south-southeast of Junction Island. The occurrence is in the SW1/4SE1/4 sec. 11, T. 45 S., R. 56 E. It is location 4 of Cobb (1972, 1978). The location is accurate within about 0.5 mile.
Geology: Johnson and Karl (1985) map the rocks in the area of this prospect as a stock of Cretaceous or Jurassic diorite. The stock is cut by diverse faults, the most prominent of which is the Peril Strait Fault, a regional-scale, northwest-striking, high-angle fault that truncates the stock on the northeast. Cobb (1972, 1978), citing Rossman (1959), reports that this prospect is a mineralized fault zone between diorite and quartz diorite. A sample contained a trace of gold. Isotopic studies indicate that the gold-quartz veins in coastal southern and southeastern Alaska are Eocene, about 50 Ma in age (Haeussler, 1995; Goldfarb, 1997; Goldfarb and others, 1997).
Age: Isotopic studies indicate that the gold-quartz veins in coastal southern and southeastern Alaska are Eocene, about 50 Ma in age (Haeussler and others, 1995; Goldfarb, 1997; Goldfarb and others, 1997).
Commodities (Major) - Au
Development Status: Undetermined.
Deposit Model: Low-sulfide gold-quartz vein (Cox and Singer, 1986; model 36a).
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: | SI015 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Chugach DomainAccretionary Complex
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