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Slate Creek No. 1

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Au
Other commodities Cu; Pb; Zn
Ore minerals arsenopyrite; chalcopyrite; galena; gold; pyrite; sphalerite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale D-6
Latitude 60.8756
Longitude -149.244
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is located in the NE1/4 section 15, T. 9 N., R. 1 E., of the Seward Meridian. It is at an elevation of 1,500 feet on Slate Creek. This is location 18 of Cobb and Richter (1972), location 13 of MacKevett and Holloway (1977), location 5 of Cobb and Tysdal (1980), and location S-313 of Jansons and others (1984). The location is accurate to within a quarter of a mile.

Geologic setting

Geologic description

The occurrence consists of two small fault-controlled quartz veins in sandstone of the Valdez Group of Late Cretaceous age (Tysdal, 1978 [MF-880-A]). One fault strikes N70E and dips 70SE; the other fault strikes N50E and dips 10-15E (Moffit, 1905). The veins carry arsenopyrite, chalcopyrite, galena, pyrite, sphalerite, and free gold (Jansons and others, 1984).
This deposit may be an extension of the veins at the Slate Creek No. 2 (SR040) and the Kenai Lu mine (SR035). All three veins are fault controlled and are nearly on strike (Martin and others, 1915).
Geologic map unit (-149.246165537623, 60.8750450329067)
Mineral deposit model Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)
Mineral deposit model number 36a
Age of mineralization Cretaceous or younger; the veins cut rocks of the Valdez Group of Late Cretaceous age.

Production and reserves

Workings or exploration The U.S. Bureau of Mines visited the occurrence in 1981 but did not collect any samples (Jansons and others, 1983).
Indication of production None

Additional comments

This deposit may be an extension of the veins at the Slate Creek No. 2 (SR040) and the Kenai Lu mine (SR035). All three veins are fault controlled and are nearly on strike (Martin and others, 1915).

References

References

Cobb, E.H., and Richter, D.H., 1972, Metallic mineral resources map of the Seward quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-466, 2 sheets, scale 1:250,000.
Cobb, E.H., and Tysdal, R.G., 1980, Summaries of data on and list of references to metallic and selected nonmetallic mineral deposits in the Blying Sound and Seward quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-621, 276 p.
Hoekzema, R.P., and Sherman, G.E., 1983, Mineral investigations in the Chugach National Forest, Alaska (Peninsula study area): U.S. Bureau of Mines in-house report; held at U.S. Bureau of Land Management Alaska State Office, Anchorage, 524 p.
Jansons, Uldis, Hoekzema, R.B., Kurtak, J.M., and Fechner, S.A., 1984, Mineral occurrences in the Chugach National Forest, southcentral Alaska: U.S. Bureau of Mines Mineral Land Assessment 5-84, 218 p., 2 sheets, 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.
Martin, G.C., Johnson, B.L., and Grant, U.S., 1915, Geology and mineral resources of Kenai Peninsula, Alaska: U.S. Geological Survey Bulletin 587, 243 p.
Moffit, F.H., 1905, Gold placers of Turnagain Arm, Cook Inlet, in Brooks, A.H., Report on progress of investigations of mineral resources of Alaska in 1904, U.S. Geological Survey Bulletin 259, p. 90-99.
Moffit, F.H., 1906, Gold fields of the Turnagain Arm region: U.S. Geological Survey Bulletin 277, p. 7-52.
Nelson, S.W., Dumoulin, J. A., and Miller, M.L., 1985, Geologic map of the Chugach National Forest, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1645-B, 16 p., 1 sheet, scale 1:250,000.
Tysdal, R.G., 1978, Mines, prospects, and occurrences map of the Seward and Blying Sound quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-880-A, 2 sheets, scale 1:250,000.
Reporters Jeff A. Huber (Anchorage)
Last report date 4/2/2000