Unnamed Prospect (ARDF - GO025; east of upper Tunulik River), Goodnews Bay, Bethel Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Prospect (ARDF - GO025; east of upper Tunulik River) | - not defined - |
| Goodnews Bay | City |
| Bethel Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
59° 15' 10'' North , 161° 30' 0'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Goodnews Bay | 256 (2017) | 15.7km |
| Quinhagak | 706 (2017) | 59.9km |
Location: This prospect is at an elevation of about 1,450 feet on the southwest flank of a ridge, about 0.6 mile east of upper Tunalik River. The map site is in the west 1/2 of section 1, T 11 S, R 73 W, of the Seward Meridian. The location is probably accurate within 1/4 mile. This is locality 4 of Kilburn and others (1993).
Geology: A composite mafic to felsic pluton intrudes Paleozoic to Mesozoic sedimentary and volcanic rocks in this area (Hoare and Coonrad, 1978). Surface observations completed for Calista Corporation (unpublished data) identified diorite or gabbro with podlike segregations (?) containing 1 to 2 percent chalcopyrite (Fechner, 1988, p. 63). A local quartz-orthoclase vein, 2 inches wide, assayed 3 ppm Au and 3,000 ppm As. The stream sediment from a small creek flowing southwest to the Tunulik River from the prospect contained 4.1 ppm Au; pan concentrate from this location contained gold flakes.
Workings: Reconnaissance surface observations and sampling have been completed in the prospect area (Calista Corporation, unpublished data).
Age: Not known. The age of the host intrusive rock is probably Jurassic or Late Cretaceous/Early Tertiary, the age of other intrusive rocks in the region (Hoare and Coonrad, 1978).
Commodities (Major) - Au, Cu
Development Status: None
Deposit Model: Vein and segregations(?) in mafic rocks
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
4 valid minerals.
Detailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Native Gold Formula: Au |
| ⓘ Orthoclase Formula: K(AlSi3O8) |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 9 - Silicates | |||
| ⓘ | Orthoclase | 9.FA.30 | K(AlSi3O8) |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Orthoclase | K(AlSi3O8) |
| O | ⓘ Quartz | SiO2 |
| Al | Aluminium | |
| Al | ⓘ Orthoclase | K(AlSi3O8) |
| Si | Silicon | |
| Si | ⓘ Orthoclase | K(AlSi3O8) |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| K | Potassium | |
| K | ⓘ Orthoclase | K(AlSi3O8) |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS - Alaska: | GO025 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Koyukuk ArcsVolcanic Arc
- Walrus-Goodnews DomainDomain
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