Tanana; Grant; Hirshberger Prospect, Fairbanks Mining District, Fairbanks North Star Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Tanana; Grant; Hirshberger Prospect | Prospect |
| Fairbanks Mining District | Mining District |
| Fairbanks North Star Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
64° 57' 7'' North , 147° 31' 44'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Fox | 417 (2011) | 4.3km |
| Farmers Loop | 4,853 (2017) | 9.4km |
| Fairbanks | 32,325 (2017) | 15.5km |
| College | 12,964 (2011) | 16.7km |
| Badger | 19,482 (2011) | 16.9km |
Location: The Tanana propsect is located in the SE1/4SW1/4 sec. 34, T. 2 N., R. 1 E., Fairbanks Meridian. The Tanana prospect is on the northeast side of Tungsten Gulch, a headwater tributary of First Chance Creek. It is about 3 miles east of the junction of the Steese and Elliott Highways at Fox. The prospect originally consisted of six scheelite lodes on five claims (Mertie, 1917). This prospect is included in locality 27 of Cobb (1972 [MF 410]).
Geology: The Tanana prospect lies along the western edge of a Cretaceous granite porphyry. Gold and tungsten are found in auriferous quartz-scheelite veinlets that cut decomposed schist (Mertie, 1917). Berg and Cobb (1967, p. 220), reported that the scheelite deposits were found in tactite, silicified limestone, granite dikes, pegmatitic dikes, and in small quartz veins in schist. The schistosity strikes N. 30 E. and dips 35 NW.; one gold-quartz vein strikes N. 8 W. and dips 60 E. (Mertie, 1917). In 1942 and 1943, the only workings that could be found were a caved shaft and several small prospect pits. These workings revealed little geologic information because they had become filled with slope wash and were overgrown with vegetation (Byers, 1957).
Workings: Prospecting took place on five claims where six scheelite lodes were identified (Mertie, 1917). In 1942 and 1943, the workings included a caved shaft and several small prospect pits (Byers, 1957).
Alteration: Schist is soft, decomposed, and iron stained (Mertie, 1917).
Commodities (Major) - Au; (Minor) - W
Development Status: None
Deposit Model: W skarn deposit (Cox and Singer, 1986; model 14a)
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.
Detailed Mineral List:
| ⓘ Native Gold Formula: Au |
| ⓘ Scheelite Formula: Ca(WO4) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Scheelite | 7.GA.05 | Ca(WO4) |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Scheelite | Ca(WO4) |
| Ca | Calcium | |
| Ca | ⓘ Scheelite | Ca(WO4) |
| W | Tungsten | |
| W | ⓘ Scheelite | Ca(WO4) |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS - Alaska: | FB095 |
|---|
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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Tanana; Grant; Hirshberger Prospect, Fairbanks Mining District, Fairbanks North Star Borough, Alaska, USA