|Main commodities||Cu; Fe|
|Ore minerals||chalcopyrite; magnetite|
|Quadrangle map, 1:250,000-scale||GU|
|Quadrangle map, 1:63,360-scale||D-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The Meier Lake prospect (Cobb, 1979: OFR 79-1247, p. 19) is on the southeast flank of the three-mile-long, east-trending ridge north of Gillespie Creek; it is about 1/4 mile west of Meier Lake. The prospect is locality 1 of Richter and Matson (1972) and MacKevett and Holloway (1977). The prospect is in the SE1/4SE1/4, of section 12, T. 12 N., R. 2 W., Copper River Meridian. The prospect is approximately located but probably correct within 1000 feet.|
Geologic descriptionGreenschist and amphibolite of pre-Triassic age occur on the north flank of a Jurassic(?) granodiorite to biotite-quartz diorite intrusion that, based on an airborne survey, underlies the Meier Lake area (Rose and Saunders (1965, figs. 1 and 3). Gabbro and diorite underlie the area north of greenschist and amphibolite. Magnetite containing small amounts of chalcopyrite occurs in greenschist and sheared diorite. Magnetite forms lenticular veinlets as much as 1 inch thick Chalcopyrite also occurs in a Jurassic(?) granodiorite on nearby Hogan Hill (GU007 and GU008).
|Geologic map unit||(-145.500201862211, 62.8285719278742)|
|Age of mineralization||Probably Jurassic, formed in contact zones of a Jurassic (?) granodiorite to biotite-quartz diorite intrusion.|
|Workings or exploration||Small exploration pits (Rose and Saunders, 1965).|
|Indication of production||None|
Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Gulkana quadrangle, Alaska: U.S. Geological Survey Open-File Report 79-1247, 36 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.
Richter, D.H., and Matson, N.A., Jr., 1972, Metallic mineral resources map of the Gulkana quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-419, 1 sheet, scale 1:250,000.
|Reporters||W.T. Ellis (Alaska Earth Sciences), C.C. Hawley (Hawley Resource Group), and W.J. Nokleberg (U.S. Geological Survey)|
|Last report date||12/20/2000|