|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 Phoenix prospect is on Hyphen Gulch, a small tributary of Iron Creek, at about an elevation of about 3,600 feet. The prospect is near the center of sec. 22, T. 26 N., R. 2 E., Seward Meridian The location is accurate to within 1/4 mile. This is locality 72 of Csejtey and Miller (1978).|
Geologic descriptionThe Phoenix prospect is in copper-stained basalt which is locally replaced by chalcopyrite, specular hematite, minor bornite, and quartz. Hematite and minor amounts of the sulfides also occurs in several narrow veins (Capps, 1919 [B 692]; Schmidt and others, 2002). A small shear zone, 2 to 3 inches wide, trends northeasterly, dips to the northwest, and contains minor quartz and copper staining (Capps, 1919 [B 692]). A 0.6-foot chip sample collected by the U.S. Bureau of Mines contains 900 parts per million copper (Fechner, 1986). Mineralization is exposed in a surface cut.
|Geologic map unit||(-149.068220764473, 62.3291042413727)|
|Mineral deposit model||Basaltic Cu (Cox and Singer, 1986; model 23)|
|Mineral deposit model number||23|
|Alteration of deposit||Oxidation of copper sulfides to azurite and malachite.|
|Workings or exploration||Mineralization is exposed in a surface cut (Capps, 1919, p. 202). A 0.6-foot chip sample collected by the U.S. Bureau of Mines contains 900 parts per million copper (Fechner, 1986).|
|Indication of production||None|
Additional commentsMAS/MILS number 20760009.
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|