Unnamed (northwest of Iron Springs Lake)

Occurrence, Probably inactive

Commodities and mineralogy

Main commodities Fe
Other commodities Ti
Ore minerals magnetite

Geographic location

Quadrangle map, 1:250,000-scale IL
Quadrangle map, 1:63,360-scale A-5
Latitude 59.0768
Longitude -154.8367
Nearby scientific data Find additional scientific data near this location
Location and accuracy 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.

Geologic setting

Geologic description

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).
Geologic map unit (-154.838807583899, 59.0761072863528)
Mineral deposit model Probably Fe skarn (Cox and Singer, 1986, model 18d).
Mineral deposit model number 18d?
Age of mineralization Jurassic or possibly Cretaceous or Tertiary, the age of a nearby granodiorite batholith.

Production and reserves

Workings or exploration The area has been geologically mapped in reconnaissance (Detterman and Reed, 1980). The occurrence was staked but there is no record of any workings.
Indication of production None

References

References

Reporters C.C. Hawley, Hawley Resource Group, Anchorage, Alaska
Last report date 6/9/2003