Unnamed Occurrence (ARDF - TK058; west of upper Tsisi Creek), Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - TK058; west of upper Tsisi Creek) | - not defined - |
| Valdez Creek Mining District | Mining District |
| Matanuska-Susitna Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
62° 34' 50'' North , 148° 25' 33'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is at an elevation of about 6,200 feet, about 1.1 mile northwest of hill 5370 and about 0.6 mile south-southeast of the center of sec. 24, T. 29 N., R. 5 E. of the Seward Meridian. The location is accurate to within 1/4 mile.
Geology: This occurrence consists of coxcomb, quartz veins that contain minor malachite, in a sill(?) of Triassic, Nikolai Greenstone. The veins are nearly vertical and trend northeasterly. Adjacent rocks include pale gray-green, schistose, tuffaceous chert(?) and medium gray, schistose, meta-igneous rock containing relict plagioclase phenocrysts (J. Schmidt, written commun., 2001). A U.S. Geological Survey rock sample contains 2,110 parts per million copper, 81 parts per million silver, 0.17 part per million mercury, and 0.2 part per million gold. (An ICP analysis by XRAL Laboratory of one sample showed 0.2 part per million gold, whereas a fire assay showed 0.046 part per million gold. The cause of the discrepancy is not known.)
Workings: Only surface sampling by U.S. Geological Survey (J. Schmidt, written commun., 2001).
Commodities (Major) - Ag, Cu; (Minor) - Au, Hg
Development Status: None
Deposit Model: Basaltic copper (Cox and Singer, 1986; model 23)
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.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| C | Carbon | |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Cu | Copper | |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Databases
| Link to USGS - Alaska: | TK058 |
|---|
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