Unnamed Occurrence (ARDF - MH079; on ridge above Two Plate Creek), Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi
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Latitude & Longitude (WGS84):
63° 18' 14'' North , 146° 35' 31'' West
Latitude & Longitude (decimal):
Köppen climate type:
The porphyry character of the deposit is inferred from reconnaissance examination and one sample.
Location: This occurrence is at an elevation of about 5,000 feet on the south side of the ridge between Two Plate Creek and Cathedral Creek, at the north edge of the NE1/4NE1/4 of section 4, T. 19 S., R. 6 E., Fairbanks Meridian. The site corresponds to locality 31 in table 2 of Nokleberg and others (1991). The location is probably accurate within one-half mile.
Geology: This occurrence consists of altered diorite porphyry, probably of Pennsylvanian and (or) Permian age, that contains disseminated pyrite and possibly a trace of molybdenite; a grab sample of pyritic porphyry contained 5 parts per million (ppm) silver and 50 ppm molybdenum (locality 31, table 2, Nokleberg and others, 1991).
Workings: There are no extensive workings at the site.
Age: Pennsylvanian and (or) Permian.
Alteration: 'Altered' diorite porphyry.
Commodities (Major) - Ag; (Minor) - Mo
Development Status: None
Deposit Model: Porphyry Cu (Cox and Singer, 1986; model 17).
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:
| ⓘ Molybdenite ? Formula: MoS2 |
| ⓘ Pyrite Formula: FeS2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Molybdenite ? | 2.EA.30 | MoS2 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Molybdenite | MoS2 |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Mo | Molybdenum | |
| Mo | ⓘ Molybdenite | MoS2 |
Other Databases
| Link to USGS - Alaska: | MH079 |
|---|
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