|Quadrangle map, 1:250,000-scale||TK|
|Quadrangle map, 1:63,360-scale||B-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The Blue Lode prospect is at an elevation of about 4,200 feet on the south, valley wall of the Middle Fork, Iron Creek, 0.6 mile northeast of the top of hill 5066. The prospect is in the NE1/4SE1/4 sec. 15, T. 26 N., R. 2 E., Seward Meridian. The location is accurate to within 1/4 mile. This is locality 73 of Csejtey and Miller (1978).|
Geologic descriptionThe Blue Lode prospect consists of chalcopyrite and bornite disseminated in Triassic, Nikolai Greenstone(?) (Schmidt and others, 2002). Outcrops on a cliff show conspicuous malachite and azurite staining. A 2-foot-wide shear zone strikes N16E and dips steeply to the west; it contains some chalcopyrite-bearing quartz (Capps, 1919 [B 692]). Samples collected by the U.S. Bureau of Mines contain up to 70,000 parts per million copper and 44 parts per million silver (Fechner, 1986).
|Geologic map unit||(-149.0528212787, 62.3417050983198)|
|Mineral deposit model||Basaltic Cu (Cox and Singer, 1986; model 23)|
|Mineral deposit model number||23|
|Age of mineralization||Occurs in Triassic Nikolai Greenstone.|
|Alteration of deposit||Oxidation of copper minerals.|
|Workings or exploration||Workings consist of an open cut. Samples collected by the U.S. Bureau of Mines contain up to 70,000 parts per million copper and 44 parts per million silver (Fechner, 1986). As of January 1, 2000, Cominco held a block of approximately 25 state claims covering this and adjacent prospects (Northern Associates Inc., written communication, 2001).|
|Indication of production||None|
Additional commentsMAS/MILS number 20760011.
Capps, S.R., 1919, Mineral resources of the upper Chulitna region: U.S. Geological Survey Bulletin 692-D, p. 207-232.
Capps, S.R., 1924, Geology and mineral resources of the region traversed by the Alaska Railroad: U.S. Geological Survey Bulletin 755-C, p. 73-150.
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.
Fechner, S.A., 1986, 1984 sample results for Bureau of Mines site-specific mineral investigations within the Yentna Mining District, Alaska: U.S. Bureau of Mines Open-File Report 28-86, 53 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.
Schmidt, J.M., Werdon, M.B., and Wardlaw, B., 2003, New mapping near Iron Creek, Talkeetna Mountains, indicates presence of Nikolai Greenstone, in Clautice, K.H., and Davis, P.K., eds., 2003, Short Notes on Alaska Geology 2003: Alaska Division of Geological & Geophysical Surveys Professional Report 120, p. 101-108.
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.
Werdon, M.B., Riehle, J.R., Schmidt, J.M., Newberry, R.J., and Pessel, G.H., 2000, Major-oxide, minor-oxide, trace-element, and geochemical data from rocks collected in the Iron Creek area, Talkeetna Mountains B-5 Quadrangle, Alaska in 1999: Alaska Division of Geological & Geophysical Surveys Raw Data File 2000-2, 31 p., 2 sheets, scale 1:63,360.
|Reporters||R.K. Rogers (U. S. Geological Survey contractor)|
|Last report date||10/1/2002|