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Unnamed Occurrence (ARDF - MH267; east of Gakona Glacier), Chistochina Mining District, Southeast Fairbanks Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
63° 13' 54'' North , 145° 5' 42'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is at an elevation 6,400 feet approximately 3 miles east of Gakona Glacier. It is in the NE1/4NE1/4 section 32, T. 19 S., R. 14 E., Fairbanks Meridian. The site corresponds to locality 1 in Rose (1967) and locality S124 in table 2 of Nokleberg and others (1991).
Geology: At this site iron-stained Late Paleozoic or younger amphibolite, hornblendite, and hornblende-augite-plagioclase rock contains 5 to 10 percent disseminated pyrite, pyrrhotite, and magnetite and a trace of chalcopyrite (Rose, 1967). The iron-stained zone exposed on the ridge is 50 feet wide and 100 (or more) feet long (Rose, 1967). A large part of the zone is steep and inaccessible. A sample containing abundant sulfides, including visible chalcopyrite, assayed less than 0.05 percent copper.
Age: Late Paleozoic or younger.
Commodities (Major) - Cu
Development Status: No
Deposit Model: Ni-Cu-PGE in differentiated mafic-ultramafic sill; possibly Porphyry Cu (Cox an
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
3 valid minerals.
Detailed Mineral List:
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Pyrrhotite Formula: Fe1-xS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| S | Sulfur | |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Pyrrhotite | Fe1-xS |
| Fe | Iron | |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Pyrrhotite | Fe1-xS |
Other Databases
| Link to USGS - Alaska: | MH267 |
|---|
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