A former underground Au-Ag mine located in the center (NE¼SW¼) of sec. 36, T1S, R17W (protracted), about 1¾ miles North of the King of Arizona Mine, on federal land. Discovered in 1906 by Felix Mayhew. Operated 1907-1911. Owned by the Golden Star Mining & Milling Co. (1907). Operated by the Caprock Energy Ltd. (1986, Vancouver, British Columbia).
Mineralization is the North Star vein. fine-grained free gold with minor silver and finely divided and disseminated pyrite in high-grade shoots and chimneys in a lode-like vein of silicified and altered Cretaceous or Tertiary andesite breccia, quartz, and banded chalcedony, with some adularia which strikes east and dips about 60ºN. The lode is an average 10 feet (3 meters) wide. The vein is along a fault zone with pink, flow-banded biotite andesite on the hanging wall and Mesozoic calcareous schist or slate on the footwall, which contains finely disseminated pyrite in places. The vein matter is striking in appearance. Near the surface are angular fragments of the pink andesite.
Workings include extensive underground openings from shafts. No. 2 shaft (500 feet deep on incline), No. 1 shaft (90 feet deep on incline), plus drifts & crosscuts each level at 100 foot intervals. An adit from the footwall side connects with the first level from No. 2 shaft. Total length of development work is about 3,500 feet.
It produced some 38,735 tons of ore averaging about 1.4 oz. Au/T and 0.6 oz. Ag/T., with a total value of more than $1,100,000 (period values). Much additional high-grade ore was stolen during the operation. A 50-ton capacity cyanide plant was erected (1908), which was later doubled. The underground workings were dewatered, and underground drilling and sampling were conducted during the period 1984-1986.
References
Jones, E.L., Jr. (1915), Gold deposits near Quartzsite, Arizona, USGS Bull. 620: 45-57, 159-160.
Jones, E.L., Jr. (1916), A reconnaissance in the Kofa Mountains, Arizona, USGS Bull. 620-H: 151-164.
Thompson (1925), Arizona Mining Journal, Nov 1925: 9(12): 7.
Wilson, E.D. (1933) Geology and Mineral Deposits of Southern Yuma County, Arizona. Arizona Bureau of Mines Bulletin 134: 42, 113-116.
Wilson, E.D., Cunningham, J.B., and Butler, G.M. (1934), Arizona Lode Gold Mines and Gold Mining (revised 1967), Arizona Bureau of Mines Bull. 137: 139-141.
Galbraith, F.W. & D.J. Brennan (1959), Minerals of Arizona: 88.
Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geological Survey Branch Bull. 192, Index of Mining Properties in Yuma County, Arizona: 155 (Table 4).
Niemuth, N.J. (1987), Arizona Mineral Development 1984-1986, Arizona Department of Mines & Mineral Resources Directory 29, 46 pp.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 140, 143, 339.
Arizona Bureau of Mines file data.
MRDS database Dep. ID file #10064557, MRDS ID #TC38959; and, Dep. ID #10234464, MAS ID #0040270307.
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