|Quadrangle map, 1:250,000-scale||TK|
|Quadrangle map, 1:63,360-scale||B-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of about 4,000 feet above a southwest tributary of a creek that is informally called Little Falls Creek (Anderson 1969). The location is about 1/2 mile east of the top of hill 5105, in the SE1/4 sec. 26, T. 28 N., R. 5 E., Seward Meridian. The location is accurate to within 1/4 mile. The occurrence is locality 48 of Csejtey and Miller (1978).|
Geologic descriptionThis occurrence consists of iron-stained Jurassic (?) quartz-diorite gneiss with inclusions of biotite schist; the rocks contain moderate to abundant amounts of pyrite and pyrrhotite, and traces of chalcopyrite (Rose, 1967). A chip sample of a stained outcrop contains 0.06 percent copper and traces of gold and silver (Anderson, 1969).
|Geologic map unit||(-149.258713189236, 62.0794879546939)|
|Mineral deposit model||Porphyry Cu-Au? (Cox and Singer, 1986; model 20c?)|
|Mineral deposit model number||20c?|
|Alteration of deposit||The gneissic quartz diorite is iron-stained.|
|Workings or exploration||Only limited rock sampling (Anderson, 1969).|
|Indication of production||None|
Anderson, R.E., 1969, Preliminary geochemistry and geology, Little Falls Creek area, Talkeetna Mts. Quadrangle, Alaska: Alaska Division of Mines and Geology Geochemical Report 19, 16 p., 1 sheet, scale 1:42,240.
Cobb, E.H., 1972, Metallic mineral resources map of the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-370, 1 sheet, scale 1:250,000.
Cobb, E.H., and Csejtey, Bela, Jr., 1980, Summaries of data on and lists of references to metallic and selected nonmetallic mineral deposits in the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-716, 63 p.
Csejtey, Bela, Jr., and Miller, R.J., 1978, Map and table describing metalliferous and selected nonmetalliferous mineral deposits in the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-558-B, 22 p., 1 sheet, scale 1:250,000.
Csejtey, Bela, Jr., Nelson, W.H., Jones, D.L., Silberling, N.J., Dean, R.M., Morris, M.S., Lanphere, M.A., Smith, J.G., and Silberman, M.L, 1978, Reconnaissance geologic map and geochronology, Talkeetna Mountains quadrangle, northern part of Anchorage quadrangle, and southwest part of Healy quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-558-A, 60 p., 1 sheet, scale 1:250,000.
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.
Rose, A.W., 1967, Geology of an area on the upper Talkeetna River, Talkeetna Mountains quadrangle, Alaska: Alaska Division of Mines and Minerals Geologic Report 32, 7 p., 1 plate, 1:63,360.
|Reporters||R.K. Rogers (U. S. Geological Survey contractor)|
|Last report date||10/1/2002|