Unnamed Occurrence (ARDF - ID136; southest of upper Granite Creek), Iditarod Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
62° 20' 50'' North , 156° 56' 41'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is at an elevation of about 1,400 feet on a northeast-facing knob overlooking Granite Creek. It is about 0.9 mile north of hill 1620 and about 0.3 mile north-northeast of the center of section 18, T. 26 N., R. 41 W., Seward Meridian. The location is accurate.
Geology: This occurrence is a discontinuous gossan of iron oxides in an aureole of hornfelsed sandstone of the Upper Cretaceous, Kuskokwim Group (Bundtzen, Miller, and Laird, 1986; Miller and Bundtzen, 1994). Disseminated pyrite was noted. Small bodies of quartz monzonite cut the hornfels near the mineralized zone. No size or structural information is available. One grab sample contained 460 parts per million (ppm) arsenic, 500 ppm copper, 10.0 ppm bismuth, and 1,000 parts per billion silver (McGimsey and others, 1988).
Workings: Samples were collected by the U.S. Geological Survey and Alaska Division of Geological and Geophysical Surveys in 1984 (McGimsey and others, 1988).
Commodities (Major) - Bi, Cu; (Minor) - Ag, As
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:
| ⓘ 'Limonite' |
| ⓘ Pyrite Formula: FeS2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Unclassified | |||
| ⓘ | 'Limonite' | - | |
Other Databases
| Link to USGS - Alaska: | ID136 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Farewell buried DomainDomain
- Farewell TerranePassive Margin
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