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Unnamed Prospect (ARDF - HE139; west of Tsusena Creek), Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Prospect (ARDF - HE139; west of Tsusena Creek) | - not defined - |
| Valdez Creek Mining District | Mining District |
| Matanuska-Susitna Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 0' 46'' North , 148° 41' 20'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Cantwell | 219 (2011) | 44.1km |
Location: This prospect is at an elevation of about 4,000 feet, near the drainage divide between Tsusena and Portage creeks. The map site is about 2.2 miles south of peak 5896, in the NW1/4 of in sec. 15, T. 22 S., R. 6 W., of the Fairbanks Meridian. The location is accurate to within 1,000 feet. This is locality D6 of Balen (1990: OFR 34-90).
Geology: The country rocks in the area of this prospect are Upper Triassic calcareous shale, argillite, and siltstone cut by numerous dikes, sills, and plugs of altered diabase and gabbro. These rocks are overlain by Oligocene to Paleocene volcanic flows, and pyroclastic rocks, and intruded by diverse, Tertiary(?) hypabyssal plutons (Wilson and others, 1998). The deposit consists of tin- and silver-bearing quartz veins and a mineralized shear-zone. The ore minerals are cassiterite, chalcopyrite, galena, sphalerite, and wolframite. Samples of the deposit contained as much as 26.5 ounces of silver per ton, 0.55% tin, 1.2% lead, 5.4% zinc, and 0.66% copper (Balen, 1991).
Workings: The deposit was explored in 1980-81 by detailed geological mapping and geophysical exploration, but the claims later were allowed to lapse (Balen, 1991).
Age: Early Tertiary(?).
Commodities (Major) - Ag, Cu, Sn; (Minor) - Pb, W, Zn
Development Status: None
Deposit Model: Sn veins (Cox and Singer, 1986; 15b)
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
5 valid minerals.
Detailed Mineral List:
| ⓘ Cassiterite Formula: SnO2 |
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Galena Formula: PbS |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Sphalerite Formula: ZnS |
| ⓘ 'Wolframite Group' |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Galena | 2.CD.10 | PbS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | Cassiterite | 4.DB.05 | SnO2 |
| ⓘ | 'Wolframite Group' | 4.DB.30 va | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Cassiterite | SnO2 |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Galena | PbS |
| S | ⓘ Sphalerite | ZnS |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| Sn | Tin | |
| Sn | ⓘ Cassiterite | SnO2 |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS - Alaska: | HE139 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Chulitna-Broad Pass DomainDomain
- Yukon-TananaVolcanic Arc
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