Unnamed Occurrence (ARDF - MH281; north of mouth of the West Fork Chistochina River), Chistochina Mining District, Southeast Fairbanks Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
63° 10' 4'' North , 144° 57' 28'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
201305
Long-form identifier:
mindat:1:2:201305:6
GUID (UUID V4):
bb1fd60c-26df-4028-a5ca-471744f14f57
Location: The occurrence is about 2 miles north of the confluence of the Chistochina River and the West Fork Chistochina River at an elevation of about 5,450 feet. The occurrence is in the SW1/4NW1/4 section 19, T. 20 S., R. 15 E., Fairbanks Meridian. It corresponds to locality 12 on figure 2 of Rose (1967).
Geology: The rocks at the site consist of andesite to dacite agglomerate, flows, and tuff of the Chisna Formation (Rose, 1967). The volcanic rocks probably correlate with Tetelna Volcanics of Pennsylvanian age or Slana Spur Formation of Pennsylvanian to Permian age (Richter and Dutro, 1975). Rose (1967) found several boulders of quartz-magnetite rock at this location; the underlying deposit is probably similar to the replacement deposit of quartz-hematite-magnetite at MH280. Both sites are about one-quarter mile west of a prominent quartz monzonite dike.
Workings: Geologic mapping only.
Age: Possibly related to Pennsylvanian to Permian volcanic rocks or to Mesozoic quartz monzonite.
Alteration: Probable replacement of intermediate volcanic rocks by quartz and magnetite.
Commodities (Major) - Fe
Development Status: None
Deposit Model: Possibly Fe skarn (Cox and Singer, 1986; model 18d).
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 | |||
---|---|---|---|
ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
O | Oxygen | |
---|---|---|
O | ⓘ Magnetite | Fe2+Fe23+O4 |
O | ⓘ Quartz | SiO2 |
Si | Silicon | |
Si | ⓘ Quartz | SiO2 |
Fe | Iron | |
Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
Other Databases
Link to USGS - Alaska: | MH281 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Wrangellia DomainDomain
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