Unnamed Occurrence (ARDF - ID069; upper Bonanza Creek), Iditarod Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - ID069; upper Bonanza Creek) | - not defined - |
| Iditarod Mining District | Mining District |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
62° 31' 9'' North , 157° 21' 14'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is on a steep bluff overlooking the east fork of Montana Creek, about 1.8 mile south of Camelback Mountain. The occurrence is at an elevation of about 1,000 feet, about 0.2 mile northwest of the center of section 13, T. 28 N., R. 44 W., of the Seward Meridian. The location is accurate.
Geology: This occurrence is a prominent, reddish-brown, goethite-rich gossan developed on pyrite-rich shale of the Upper Cretaceous, Kuskokwim Group (Miller and Bundtzen, 1994; Bundtzen and others, 1988; Miller, Bundtzen, and Gray, 2005). The east-west striking gossan is at least 10 feet thick and can be traced laterally for about 320 feet. A grab sample contained only slightly anomalous silver (100 ppb), mercury (300 ppb) and iron (5.88 percent), and no other metals in anomalous concentration (Bundtzen, Laird, and Lockwood, 1988).
Workings: Surface investigations were done by the Alaska Division of Geological and Geophysical Surveys in 1983 (Bundtzen and others, 1988).
Alteration: Pyrite oxidized to goethite.
Commodities (Major) - Ag; (Minor) - Fe
Development Status: None
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.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Goethite | 4.00. | Fe3+O(OH) |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Goethite | Fe3+O(OH) |
| O | Oxygen | |
| O | ⓘ Goethite | Fe3+O(OH) |
| S | Sulfur | |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Goethite | Fe3+O(OH) |
| Fe | ⓘ Pyrite | FeS2 |
Other Databases
| Link to USGS - Alaska: | ID069 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Farewell buried DomainDomain
- Farewell TerranePassive Margin
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