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Plumbum Prospect, Fairbanks Mining District, Fairbanks North Star Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Plumbum Prospect | Prospect |
| Fairbanks Mining District | Mining District |
| Fairbanks North Star Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
65° 4' 1'' North , 147° 18' 0'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Fox | 417 (2011) | 19.2km |
| Two Rivers | 719 (2011) | 24.9km |
| Farmers Loop | 4,853 (2017) | 25.7km |
| Pleasant Valley | 725 (2011) | 28.9km |
| Badger | 19,482 (2011) | 31.6km |
Location: The Plumbum prospect is located on the west side of Too Much Gold Creek near its confluence with Fairbanks Creek; SW1/4SW1/4 sec. 23, T. 3 N., R. 2 S., of the Fairbanks Meridian.
Geology: This prospect contains a silver and gold-bearing carbonate-rich shear zone. The country rock is schist that strikes east-west and dips to the south at a shallow angle parallel to the schist (Brooks, 1913, p. 146). Prior to 1912, a 26-foot-deep shaft was sunk on the prospect and exposed the silver- and gold-bearing, carbonate-rich shear zone. In the summer of 1912, a 4- to 18-inch-wide cross-shear had been discovered on the prospect. A high grade sample from this cross-shear averaged over 820 ounces of gold per ton (Times Publishing Company, 1912). A 15-foot-deep test pit on this cross-shear exposed an east-west striking, steeply dipping quartz-bearing shear zone that varied from 3 inches to 2 feet wide (Smith, 1913, B 525; Brooks, 1913). The shear zone material was heavily stained by iron-oxides (Brooks, 1913, p. 146). Later phase, crystalline quartz vugs also contained iron-oxides after sulfides (Brooks, 1913, p. 146). By 1913, the shear zone had been traced for approximately 1,500 feet along strike and 1.5 tons of material had been stockpiled for later shipment to a nearby custom mill (Brooks, 1913, p. 146). Hill (1933) reported that exposures on the Plumbum prospect indicated the shear zone strikes N 70 W and dips 70 S. The prospect had not been worked for some time prior to 1931.
Workings: A 26 foot deep shaft was dug by 1912 (Times Publishing Company, 1912). Brooks (1913) reported that the shear zone could be traced for approximately 1,500 feet along strike and 1.5 tons of material had been stockpiled for later shipment to a nearby custom mill.
Commodities (Major) - Au
Development Status: Undetermined
Deposit Model: Silver and gold-bearing, carbonate-rich shear zone.
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.
Gallery:
Other Databases
| Link to USGS - Alaska: | LG168 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- North America PlatformPassive Margin
- Yukon-Tanana lower DomainDomain
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