|Quadrangle map, 1:250,000-scale||TK|
|Quadrangle map, 1:63,360-scale||D-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This prospect which has been located as the Caribou 1-59 claims is at an elevation of about 2,250 feet, at the west end of a plateau bounded by Portage Creek, Devils Canyon, and Devil Creek It is 2.8 miles north-northeast of the junction of Portage Creek and the Susitna River in the SW1/4 sec. 17, T. 32 N., R. 1 E., Seward Meridian. The location is accurate to within 1/4 mile. It is locality 8 of Csejtey and Miller (1978).|
Geologic descriptionThe host rock of this prospect is quartz monzonite of Cretaceous or Tertiary age (Richter, 1963) Silicified, fluorite-bearing, shear zones in the quartz monzonite contain lenses, vugs and masses of molybdenite crystals and other sulfides, chiefly pyrite, chalcopyrite, and sphalerite. Channel samples contain up to 0.1 percent molybdenum and 0.1% zinc (Richter, 1963). The mineralization is probably a quartz-monzonite-related porphyry deposit.
|Geologic map unit||(-149.32016221631, 62.8592185503572)|
|Mineral deposit model||Porphyry Cu-Mo (Cox and Singer, 1986; model 21a)|
|Mineral deposit model number||21a|
|Age of mineralization||In Cretaceous or Tertiary rocks.|
|Alteration of deposit||Silicification along shear zones.|
|Workings or exploration||Workings consist of a bench cut and a short adit. Channel samples contain up to 0.1 percent molybdenum and 0.1 percent zinc (Richter, 1963). Further exploration at this locality may be justified but would require heavy equipment or drilling due to poor surface exposure (Richter, 1963).|
|Indication of production||None|
Additional commentsMAS/MILS number 20760004.
Berg, H.C., and Cobb, E.H., 1967, Metalliferous lode deposits of Alaska: U.S. Geological Survey Bulletin 1246, 254 p.
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.
Richter, D.H., 1963, Geology of the Portage Creek-Susitna River area, Alaska: Alaska Division of Mines and Minerals Geologic Report 3, 2 plates, scale 1:24,000.
Singer, D.A., Csejtey, Bela, Jr., and Miller, R.J., 1978, Map and discussion of the metalliferous and selected non-metalliferous mineral resources of the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-file Report 78-558-Q, 33 p., 1 sheet, scale 1:250,000.
|Reporters||R.K. Rogers (U. S. Geological Survey contractor)|
|Last report date||9/30/2002|