Unnamed Occurrence (ARDF - IL038; northwest of Iron Springs Lake), Bristol Bay Mining District, Lake and Peninsula Borough, Alaska, USAi
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Latitude & Longitude (WGS84):
59° 4' 36'' North , 154° 50' 13'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Kokhanok | 170 (2015) | 40.5km |
Location: This occurrence is at an elevation of about 2,650 feet about 0.8 mile northwest of the north end of Iron Springs Lake. It is in the SE1/4 sec. 6, T. 13 S., R. 33 W., Seward Meridian. This site, which is locality 25 of MacKevett and Holloway (1977), is accurate within about 1 mile.
Geology: The country rocks at this occurrence are intermediate and mafic volcanic rocks of the Jurassic Talkeetna Formation (Detterman and Reed, 1980). A batholith, chiefly of Cretaceous or Tertiary granodiorite, crops out at Iron Springs Lake and possibly underlies the area of the occurrence at relatively shallow depth. The occurrence was staked (U.S. Bureau of Mines, 1973), probably as a magnetite-bearing skarn deposit (MacKevett and Holloway, 1977).
Workings: The area has been geologically mapped in reconnaissance (Detterman and Reed, 1980). The occurrence was staked but there is no record of any workings.
Age: Jurassic or possibly Cretaceous or Tertiary, the age of a nearby granodiorite batholith.
Commodities (Major) - Fe; (Minor) - Ti
Development Status: None
Deposit Model: Probably 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
1 valid mineral.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| 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 |
| Fe | Iron | |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
Other Databases
| Link to USGS - Alaska: | IL038 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Peninsular-Iliamna DomainDomain
- Peninsular TerraneVolcanic Arc
USA
- Alaska
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