Unnamed Occurrence (ARDF - MH289; near the mouth of Slate Creek), Chistochina Mining District, Southeast Fairbanks Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
63° 10' 13'' North , 144° 51' 46'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Location: This occurrence is near the mouth of Slate Creek, near the center of the W1/2NW1/4 section 22, T. 20 S., R. 15 E., Fairbanks Meridian. The occurrence corresponds to locality 24 of Rose (1967), locality 17 on figure 6 of Cobb (1979 [OFR 79-238]), locality 48 of MacKevett and Holloway (1977), and locality 136 in table 2 of Nokleberg and others (1991). The location is accurate within 0.1 mile.
Geology: Rocks in the vicinity of the occurrence consist mainly of andesite and dacite of Pennsylvanian age northwest of a dikelike body of quartz monzonite of Mesozoic age (Rose, 1967). The volcanic rocks are highly pyritized and contain weakly disseminated chalcopyrite (MacKevett and Holloway, 1977). A sample of pyritized volcanic rocks contained a trace of gold, 0.12 ounce of silver per ton, and 0.15 percent copper (Rose, 1967).
Age: The mineralization is either syngenetic and related to the Pennsylvanian volcanic rocks or epigenetic, related to the Mesozoic quartz monzonite body.
Alteration: Pyritization of volcanic rocks.
Commodities (Major) - Cu; (Minor) - Ag, Au
Development Status: No
Deposit Model: Porphyry Cu (Cox and Singer, 1986; model 20c).
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:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Pyrite Formula: FeS2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
Other Databases
| Link to USGS - Alaska: | MH289 |
|---|
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