|Quadrangle map, 1:250,000-scale||IL|
|Quadrangle map, 1:63,360-scale||A-5|
|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 descriptionThe 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.|
|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|
Detterman, R.L., and Reed, B.L., 1980, Stratigraphy, structure, and economic geology of the Iliamna quadrangle, Alaska: U.S. Geological Survey Bulletin 1368-B, 86 p.
MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.
U.S. Bureau of Mines, 1973, Iliamna, Alaska quadrangle maps showing mineral deposit locations, principal minerals, and number and type of claims: U.S. Bureau of Mines Open-File Report 20-73, scale 1:250,000.
|Reporters||C.C. Hawley, Hawley Resource Group, Anchorage, Alaska|
|Last report date||6/9/2003|