Chicago Creek Mine, Hot Springs Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Chicago Creek Mine | Mine |
| Hot Springs Mining District | Mining District |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
65° 10' 46'' North , 150° 21' 32'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Location: Placer mining has occurred on Chicago creek near its mouth. The site is at the intersection of Chicago Creek and the Thanksgiving drainage ditch, in the northeast quarter of section 15, T. 4 N., R. 14 W., of the Fairbanks Meridian. The location is accurate within 0.5 mile. The site is included in location 38 of Cobb (1972), and roughly corresponds with the site for Chicago Creek, U.S. Bureau of Land Management MAS number 0020480047.
Geology: The Chicago Creek area is marked by low, predominantly alluvium-covered topography (Chapman and others, 1982). The area is underlain by Mesozoic clastic sedimentary rocks including sandstone, siltstone, and shale, that are cut by thrust faults and locally intruded by Cretaceous monzodiorite (Reifenstuhl and others, 1998). Gold was first reported on Chicago Creek in 1904 (Hess, 1908). Little work was reported, however, until 1935 through 1937 (Chapin,1919; Smith,1937, 1938, 1939), when Chicago Creek was considered a significant producer in the Eureka area. The gravels were 5 to 6 feet thick and overlay dark gray shale. According to Cobb (1981), nuggets 0.3 to 0.8 inch in diameter were found, some still attached to quartz. Mining of unknown extent was reported in 1973 (Cobb, 1981).
Workings: Gold was first reported on Chicago Creek in 1904 (Hess, 1908). Little work was reported, however, until 1935 through 1937 (Chapin,1919; Smith,1937, 1938, 1939), when Chicago Creek was considered a significant producer in the Eureka area. The gravels were 5 to 6 feet thick and overlay dark gray shale. According to Cobb (1981), nuggets 0.3 to 0.8 inch in diameter were found, some still attached to quartz. Mining of unknown extent was reported in 1973 (Cobb, 1981).
Age: Quaternary.
Production: According to Cobb (1981), angular nuggets 0.3 to 0.8 inch in diameter were recovered from the Chicago Creek placer. Production figures have not been made public, but production probably was small, despite local rumors of significant production in 1935-1937.
Commodities (Major) - Au
Development Status: Yes; small
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
1 valid mineral.
Detailed Mineral List:
| ⓘ Native Gold Formula: Au |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
List of minerals for each chemical element
| Au | Gold | |
|---|---|---|
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS - Alaska: | TN120 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Arctic AlaskaPassive Margin
- Wickersham DomainDomain
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