Eastview (ARDF #TK078) Cu

Eastview

Prospect, Inactive

Commodities and mineralogy

Main commodities	Cu
Other commodities	Ag; Fe
Ore minerals	chalcopyrite; hematite; pyrite
Gangue minerals	quartz

Geographic location

Quadrangle map, 1:250,000-scale	TK
Quadrangle map, 1:63,360-scale	B-5
Latitude	62.3365
Longitude	-149.0585
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	The Eastview prospect is at an elevation of about 4,000 feet on the ridge at the head of Hyphen Creek. The prospect is south of Middle Fork Iron Creek and about 0.3 mile southeast of the top of hill 5066, in the NW1/4NE14 sec. 22, T. 26 N., R. 2 E., Seward Meridian. The location is accurate to within 1/4 mile. This is locality 71 of Csejtey and Miller (1978).

Geologic setting

Geologic description Basalt float at the Eastview prospect contains banded quartz, hematite, pyrite, and chalcopyrite; the chalcopyrite is locally abundant (Capps, 1919 [B 692]). The rocks in the vicinity are Triassic(?) basalt (Schmidt and others, 2002). Samples collected by the U.S. Bureau of Mines contain up to 23,000 parts per million copper and 6 parts per million silver (Fechner, 1986).
Geologic map unit	(-149.060721070945, 62.3360046929073)
Mineral deposit model	Basaltic Cu (Cox and Singer, 1986; model 23)
Mineral deposit model number	23
Age of mineralization	Occurs in Triassic(?) basalt.

Production and reserves

Workings or exploration	Three open cuts did not reach bedrock. Samples collected by the U.S. Bureau of Mines contain up to 23,000 parts per million copper and 6 parts per million silver (Fechner, 1986).
Indication of production	None
Additional comments MAS/MILS number 20760010.

References

MRDS Number	A012193
References 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