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Unnamed Occurrence (ARDF - TN114; Karshner Creek Ridge), Hot Springs Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - TN114; Karshner Creek Ridge) | - not defined - |
| Hot Springs Mining District | Mining District |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
65° 0' 30'' North , 150° 37' 58'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is at an elevation of about 550 feet, on a south-facing ridge on the east side of Karshner Creek and about 1,500 feet north of Karshner hot spring. The site is at Alaska Division of Geological and Geophysical Surveys (ADGGS) sample station 97SL229A (Liss and others, 1998), near the southeast corner of section 8, T. 2 N., R. 15 W., of the Fairbanks Meridian. The location is accurate within 500 feet.
Geology: Bedrock in the area of this occurrence is mainly Lower Cretaceous sandstone, shale, and siltstone that has been hornfelsed by the Tertiary Hot Springs granite pluton (Reifenstuhl and others, 1998). The hornfels is black, dense rock that contains unoriented crystals or rosettes of muscovite, biotite, and, locally, andalusite. Felsic dikes associated with the Hot Springs granite pluton occur throughout the area. Several samples (97RR168B, 97SL229A, and 97SL229B) of gossan and hornfelsed shale on a ridge just east of Karshner Creek contained one or more of the following maximum geochemical values: more than 15 percent iron, 40 parts per million (ppm) lanthanum, 1,795 ppm manganese, 548 ppm lead, 40 ppm uranium, and 1,130 ppm zinc (Liss and others, 1998). There is no record of lode exploration or mining at this site.
Workings: Several samples (97RR168B, 97SL229A, and 97SL229B) of gossan and hornfelsed shale on a ridge just east of Karshner Creek contained one or more of the following maximum geochemical values: more than 15 percent iron, 40 parts per million (ppm) lanthanum, 1,795 ppm manganese, 548 ppm lead, 40 ppm uranium, and 1,130 ppm zinc (Liss and others, 1998). There is no record of lode exploration or mining at this site.
Commodities (Major) - Pb, Zn; (Minor) - Fe, Mn, U
Development Status: None
Deposit Model: Possibly epithermal, polymetallic, or mesothermal veins related to the Tertiary
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
Detailed Mineral List:
| ⓘ 'Limonite' |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Unclassified | |||
|---|---|---|---|
| ⓘ | 'Limonite' | - | |
List of minerals for each chemical element
Other Databases
| Link to USGS - Alaska: | TN114 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Arctic AlaskaPassive Margin
- Wickersham DomainDomain
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