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Unnamed Occurrence (ARDF - MH308; near the head of Willow Creek), Chistochina Mining District, Valdez-Cordova Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
63° 6' 20'' North , 144° 44' 9'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is on the ridge at the headwaters of Willow Creek, a southwest-flowing tributary of the Chisna River. The occurrence is at an elevation of about 5,500 feet near peak 5770. The occurrence is near the center of the W1/2SW1/4 section 8, T. 21 S., R. 16 E., Fairbanks Meridian. It corresponds to locality 142 in table 2 of Nokleberg and others (1991); the location is probably accurate within 0.2 mile.
Geology: The rocks in the vicinity consist of meta-andesite porphyry of the Tetelna Volcanics of Pennsylvanian age (Nokleberg and others, 1991). The meta-andesite is locally stained with malachite; a grab sample assayed 0.64 percent copper, 15 parts per million (ppm) silver, and 0.20 ppm gold (Nokleberg and others, 1991).
Workings: Only limited surface sampling.
Age: Pennsylvanian or younger, on the basis of the age of host rocks.
Commodities (Major) - Cu; (Minor) - Ag, Au
Development Status: No
Deposit Model: Uncertain; polymetallic vein(s) (?) (Cox and Singer, 1986 model 22c).
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: | MH308 |
|---|
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