Sparrevohn Occurrences, McGrath Mining District, Bethel Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Sparrevohn Occurrences | Group of Occurrences |
| McGrath Mining District | Mining District |
| Bethel Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
61° 7' 29'' North , 155° 38' 20'' West
Latitude & Longitude (decimal):
Type:
Group of Occurrences
Köppen climate type:
Location: Drainages in a several-square-mile area northwest of Sparrevohn Air Force Station contain detrital gold (Eppinger, 1993). The map site is at an elevation of 1,250 feet on one of the drainages flowing northwest from the Sparrevohn uplands in the SE1/4 section 15, T 12 N, R 36 W, of the Seward Meridian. The map site is chosen to represent the general area of gold occurrences.
Geology: Pan concentrates from several drainages in this area contain detrital gold, and one contains gold and cinnabar (Eppinger, 1993). Most of the gold is well-rounded and flat, except for that in the one sample that contains cinnabar. Bedrock in the area is dominantly Cretaceous clastic sedimentary rocks (Eppinger, 1993).
Age: Quaternary.
Commodities (Major) - Au, Hg
Development Status: None
Deposit Model: Placer Au (Cox and Singer, 1986, model 39a)
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:
| ⓘ Cinnabar Formula: HgS |
| ⓘ Native Gold Formula: Au |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Cinnabar | 2.CD.15a | HgS |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Cinnabar | HgS |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
| Hg | Mercury | |
| Hg | ⓘ Cinnabar | HgS |
Other Databases
| Link to USGS - Alaska: | LH003 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Farewell-McGrath DomainDomain
- Farewell TerranePassive Margin
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