Ladue; North Ladue; Ladue Camp Prospect, Fortymile District, Southeast Fairbanks Borough, Alaska, USA
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Location: Ladue, also called North Ladue and Ladue Camp, is a large block of claims located in sections 2, 11, 12, and 13, T. 19 N., R. 22 E., of the Copper River Meridian, about four miles from the Canadian border. It is location 13 of Singer and others (1976), and location 8 of Eberlein and others (1977). The prospect covers about 2 square miles. The coordinates are for the approximate center of the most intense prospecting activity, in the southern portion of the claim block. The location is accurate to within a mile.
Geology: The Ladue prospect consists of galena and sphalerite in rhyolite dikes that cross-cut amphibolite-grade, quartz-mica schist of Paleozoic and/or Precambrian age. The Ladue claims were staked in 1975 and 1976. In 1976, the property was explored using ground and airborne electromagnetic surveys. Soil sampling in 1976 indicated several zones of anomalous lead-zinc values, spatially related to good conductors (Eberlein and others, 1977, p. 101). In 1982, Noranda spent 18 field days exploring the property. They conducted electromagnetic surveys, soil geochemistry, and geologic mapping (Dunbier, 1982). The Noranda efforts focused on the Lucy claim block as one of the most promising in the area. After the field work was finished, Noranda concluded that there were low-level anomalies of copper, lead and zinc, but that there was not a near-surface massive sulfide deposit on the Lucy claim block, although one may exist in the region (Dunbier, 1982).
Workings: In 1976, the property was explored using airborne and ground electromagnetics. An undetermined amount of soil sampling also took place (Eberlein and others, 1977, p. 101). In 1982, the property was explored again using electromagnetic surveys, soil sampling, geologic mapping, and reconnaissance geologic mapping and sampling by Noranda (Dunbier, 1982).
Commodities (Major) - Cu, Pb; (Minor) - Zn
Development Status: None
Deposit Model: Stratabound Cu-Pb-Zn volcanogenic deposit?
Mineral List
2 entries listed. 2 valid minerals.
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References
Cobb, E.H., and Eberlein, G.D., 1980, Summaries of data on and lists of references to metallic and selected nonmetallic mineral deposits in the Big Delta and Tanacross quadrangles, Alaska: U.S. Geological Survey Open-File Report 80-1086, 77 p. Dunbier, John, 1982, Final report, the Ladue River prospect: Noranda Exploration Inc, unpublished report, 18 p. Eberlein, G.D., Chapman, R.M., Foster, H.L., and Gassaway, J.S., 1977, Map and table describing known metalliferous and selected nonmetalliferous mineral deposits in central Alaska: U.S. Geological Survey Open-File Report 77-168-D, 132 p., 1 sheet, scale 1:1,000,000. Singer, D.A., Curtin, G.C., and Foster, H.L., 1976, Mineral resources map of the Tanacross quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-767-E, 1 sheet, scale 1:25,000.
