Unnamed Occurrence (ARDF - SM004; east head of Getmuna Creek), Aniak Mining District, Bethel Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - SM004; east head of Getmuna Creek) | - not defined - |
| Aniak Mining District | Mining District |
| Bethel Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
61° 46' 28'' North , 158° 28' 44'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Crooked Creek | 105 (2016) | 22.0km |
Location: This occurrence is located at the toe of an east-west-trending ridge east of the head of Getmuna Creek. It is at an elevation of about 2,600 feet, about 0.5 mile west of hill 3515, in the SW 1/4 sec. 35, T. 20 N., R. 51 W., of the Seward Meridian. The location is accurate.
Geology: This occurrence consists of axinite-quartz-sulfide veins in dacite tuff of the Horn Mountains volcanic field (Bundtzen and others, 1998). The veins are 2 to 4 inches thick, strike N25-40W, dip vertically, and can be traced along strike for about 65 feet before disappearing under talus. One grab sample of mineralization contained 54 parts per billion (ppb) gold, 1,300 ppb silver, 1,179 parts per million (ppm) zinc, 3.0 ppm cadmium, and 22 ppm antimony (Bundtzen and others, 1998). The occurrence is in an area marked by anomalous stream sediment and panned concentrate sample sites (Gray and others, 1994; Theodorakos and others, 1992). Stream sediment samples from this area contained up to 26 ppb gold, 950 ppb silver, 290 ppm arsenic, 57 ppm antimony, 4.0 ppm mercury, 6.4 ppm bismuth, and 0.6 ppm tellurium. Panned concentrate samples contained up to 30 ppm gold, 5 ppm silver, 1,500 ppm bismuth, 500 ppm lead, 200 ppm antimony, 1,000 ppm tungsten, 1,000 ppm boron. Panned concentrates also contained up to 1.0 percent scheelite.
Workings: Surface sampling was conducted by the Alaska Division of Geological and Geophysical Surveys in 1990 (Bundtzen and others, 1998).
Age: Undated; may be related to the nearby Horn Mountain pluton which has been dated at 68-69 Ma (Bundtzen and others, 1998)
Alteration: Development of axinite-quartz greisen.
Commodities (Major) - Au, Zn; (Minor) - Ag, Cd, Sb, W
Development Status: None
Deposit Model: Polymetallic vein (Cox and Singer, 1986; model 22c).
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.
Detailed Mineral List:
| ⓘ 'Axinite Group' |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Unclassified | |||
| ⓘ | 'Axinite Group' | - | |
Other Databases
| Link to USGS - Alaska: | SM004 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Farewell buried DomainDomain
- Farewell TerranePassive Margin
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