Cox Brothers Prospect, Chichagof Mining District (Chicagof Mining District), Sitka, Alaska, USAi
| Regional Level Types | |
|---|---|
| Cox Brothers Prospect | Prospect |
| Chichagof Mining District (Chicagof Mining District) | Mining District |
| Sitka | City Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
57° 47' 29'' North , 136° 14' 23'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Location: The Cox Brothers prospect is at an elevation of about 400 feet on the peninsula between Baker Cove and inner Goulding Harbor. The prospect is about 0.2 mile south of the center of sec. 18, T. 47 S., R. 57 E. It is location P-48 of Bittenbender and others (1999) and MAS no. 0021140203 (U.S. Bureau of Land Management, 2002). The location is accurate within about 0.2 mile.
Geology: Johnson and Karl (1985) map the rocks in the area of this prospect as the Freeburn assemblage, a collage of kilometer-scale, fault-bounded, lozenge-shaped blocks of Cretaceous and Cretaceous(?) metasedimentary and metavolcanic rocks. The rocks are cut by high-angle, mainly northwest-striking faults, one of which transects the prospect area. Bittenbender and others (1999), citing Still and Weir (1981), describe this prospect as an auriferous quartz vein that has been explored by a 16-foot adit and several trenches and pits. The host rocks are not described. Samples of the vein assayed up to 0.30 ounce of gold per ton across 2.5 feet, and up to 0.1 ounce of gold per ton across 2.7 feet. 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).
Workings: The prospect has been explored by a 16-foot adit and several trenches and pits.
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
2 valid minerals.
Detailed Mineral List:
| ⓘ Native Gold Formula: Au |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS - Alaska: | SI039 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Chugach DomainAccretionary Complex
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