|Quadrangle map, 1:250,000-scale||SR|
|Quadrangle map, 1:63,360-scale||D-7|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence on Donaldson Creek is at an elevation of 1,800 feet. It is in the SW1/4 section 20, T. 8 N., R. 1 W., of the Seward Meridian. The location is accurate to within a quarter of a mile. This is location 13 of Cobb and Richter (1972), location 12 of MacKevett and Holloway (1977), location 28 of Cobb and Tysdal (1980), and location S-277 of Jansons and others (1984).|
Geologic descriptionThis occurrence consists of a slightly mineralized felsic dike that cuts slate and graywacke of the Valdez Group of Late Cretaceous age (Tuck ,1933; Nelson and others, 1985). The dike strikes N30E, dips vertically, and ranges in width from 8 to 10.5 feet. It is similar to, and could be a continuation of, the Gilpatrick dike (Martin and others, 1915). The highest gold assay value reported is $1.08 per ton (gold at $20.67 per ounce)(Johnson, 1915).
|Geologic map unit||(-149.496951659718, 60.7681211512953)|
|Mineral deposit model||Low-sulfide Au-quartz vein (Cox and Singer, 1986; model 36a)|
|Mineral deposit model number||36a|
|Age of mineralization||Cretaceous or younger; the felsic dikes cut rocks of the Valdez Group of Late Cretaceous age.|
|Workings or exploration||Martin and others (1915) reported open cuts showing sparse mineralization. The highest gold assay value reported is $1.08 per ton (gold at $20.67 per ounce).|
|Indication of production||None|
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.
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.
Tuck, Ralph, 1933, The Moose Pass-Hope district, Kenai Peninsula, Alaska: U.S. Geological Survey Bulletin 849-I, p. 469-530.
|Reporters||Jeff A. Huber (Anchorage)|
|Last report date||2/4/2000|