Latitude: 64°53'38"N
Longitude: 164°44'56"W
Location: This mine is in the headwaters of Rabbit Creek (SO118) a small west tributary of Iron Creek. It appears to be at about 1,000 feet elevation but it is not well located. This is locality 2 of Cobb (1972, MF 445; 1978, OF 78-181).
Geology: This mine is on the west side of Iron Creek; many similar deposits are exposed east of Iron Creek (e.g., SO124 and SO125). It is generally located; Mertie (1918) comments that several claims have been staked in the headwaters of small west tributaries of Iron Creek. Exploration work included an 80-foot-deep shaft and a 60-foot-long tunnel. Dump material contained chalcopyrite and bornite, but outcrops contained malachite. Up to 9 feet of quartz-rich rocks with malachite stains and stringers are exposed in outcrop (Merite, 1918). Several tons of ore were reportedly shipped from this mine. This deposit is one of many occurrences of copper mineralization in silica-rich rocks near the regional contact between marble in a lower Paleozoic metasedimentary assemblage and pelitic schist of possible Cambrian or Precambrian age (Till and others, 1986). This type of copper occurrence is present at several localities in the western Solomon quadrangle (Gamble, 1988) and has similarities to several in the Kougarok area of the northeastern Teller quadrangle. In the Teller quadrangle, the Ward mine (TE071) is an example of this type of copper mineral occurrence. The Ward mine has been described as a zone of silicification in marble above a thrust over underlying metapelitic schist (Sainsbury and others, 1969; Sainsbury, 1975, p. 90-94). The silica-rich rocks have been metamorphosed and commonly have a laminar fabric. Copper-bearing minerals, mostly malachite but also including azurite and in places chalcopyrite and possibly bornite, are disseminated in the silica-rich rocks. The minor sulfides tend to be along faint laminae and joints (Sainsbury and others, 1969, p. 22). Malachite and azurite also occur in small veins and veinlets in the silica-rich rocks. The summary characterization of this type of Seward Peninsula mineral deposit by Sainsbury (1975, p. 90-94) contains inconsistencies with some descriptions of these deposits. Their origin is uncertain and other possibilities should be considered. One possiblity is that the silica-rich rocks are quartzites and that there is a stratigraphic control to the Ward deposit and similar occurrences elsewhere on Seward Peininsula. Quarzite at the base of the regional carbonate assemblage is recognized elsewhere in the Kougarok Mountain area (Puchner, 1986, p. 1777).
Workings: Exploration work included an 80-foot-deep shaft and a 60-foot-long tunnel.
Age: Unknown; if stratigraphic controls are important then it is probably Paleozoic in age.
Alteration: Silicification (?) and oxidation; the development of silica-rich rocks at or near the the base of Paleozoic marble characterizes this type of copper occurrence.
Production: Several tons of ore were reportedly shipped from this mine prior to 1918.
Commodities (Major) - Cu
Development Status: Yes; small
Deposit Model: Copper-bearing mineralization in silica-rich zones at or near base of marble.
References
Cobb, E.H., 1972, Metallic mineral resources map of the Solomon quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-445, 1 sheet, scale 1:250,000. Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Solomon quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-181, 185 p. Gamble, B.M., 1988, Non-placer mineral occurrences in the Solomon, Bendeleben, and southern part of the Kotzebue quadrangles, western Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1838-B, 13 p., 1 sheet, scale 1:250,000. Mertie, J.B., Jr., 1918, Lode mining and prospecting on Seward Peninsula: U.S. Geological Survey Bulletin 662-H, p. 425-449. Puchner, C.C., 1986, Geology, alteration, and mineralization of the Kougarok Sn deposit, Seward Peninsula, Alaska; Discussion reply: Economic Geology, v. 82, p. 2201-2204. Sainsbury, C.L., 1975, Geology, ore deposits, and mineral potential of the Seward Peninsula, Alaska: U.S. Bureau of Mines Open-File Report 73-75, 108 p., 3 sheets, scale 1:250,000. Sainsbury, C.L., Kachadoorian, Reuben, Hudson, Travis, Smith, T.E., Richards, T.R., and Todd, W.E., 1969, Reconnaissance geologic maps and sample data, Teller A-1, A-2, A-3, B-1, B-2, B-3, C-1, and Bendeleben A-6, B-6, C-6, D-5, and D-6 quadrangles. Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 377, 49 p., 12 sheets, scale 1:63,360. Till, A.B., Dumoulin, J.A., Gamble, B. ., Kaufman, D.S., and Carroll, P.I., 1986, Preliminary geologic map and fossil data, Soloman, Bendeleben, and southern Kotzebue quadrangles, Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 86-276, 10 p., 3 plates, scale 1:250,000.
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