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Table Mountain Mine, Table Mountain area, Table Mountain District, Galiuro Mts, Pinal Co., Arizona, USA

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A former underground Cu-Ag-Au-Pb-Zn-Mo-V-Ba(Baryte) mine located on 12 patented claims, in the SE¼ sec. 15, and the NE¼ sec. 22, T7S, R18E (Oak Grove Canyon 7.5 minute topo map), near Sycamore Canyon, about 1¼ miles SE of Table Mountain, 1¼ miles NNE of Little Table Mountain, and about 4½ miles N of Copper Creek ghost town, on BLM-administered land. Discovered in the late 1870's and first prospected for Au. Owned by Mollie Morgan, Evelyn Sandstrom, Mattie Young, and Marion Gills (1964).

Mineralization is a vein deposit hosted in Escabrosa Limestone, agglomerate and andesite. The orebodies are tabular, sporadic and irregular pods at 30.48 meters thick. Ore control was a jasperoid breccia layer up to 100 feet thick containing ore, fault and joint surfaces. Area structure is vertical fault zones in limestone with NNW-trending block faulting.(MRDS). Some veins are along fractures. Escabrosa Limestone is unconformably overlain by Galiuro Volcanics. Oxidation probably preceeded andesite flows. This deposit may be an exotic/secondarily derived deposit from erosion of nearby deposits.

Development included about 2,000 feet (609 meters) of underground workings achieving a depth of 12.19 meters. The cliff-forming unit has been developed by 6 adits ranging up to 700 feet in length. The principal workings are on the east side of the north-trending ridge. One of the adits encountered caverns in the limestone which were reportedly lined with crystals of wulfenite and vanadinite. The most common ore mineral found was chrysocolla, along with malachite, azurite, dioptase, and free-milling gold. No sulfides are present. (Heylmun, 1998).

Workings incude adits and drifts. The main adit is caved 200 feet from the portal.

Assay data: Ore on the dump assayed 2-3% Cu, 0.5-0.6 oz/t Ag, 0.14-0.15 oz/t Au. Sorted chrysocolla averages 20-25% Cu. Slag assayed 2.4% Cu & 0.02 oz/t Au. The vein in the adit assayed 3-4% Pb, 1-2% vanadic oxide, 2-3 oz/t Ag and $5-18/t Au (period prices).

Mineral List



17 entries listed. 16 valid minerals.

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References

Kuhn, T.H. (1941) Pipe deposits of the Copper Creek area. Economic Geology: 36(5): 512-538.

Galbraith, F.W. & D.J. Brennan (1959), Minerals of Arizona: 73, 111.

Bideaux, R.A., et al (1960), Some new occurrences of minerals of Arizona, Arizona Geological Society Digest: 3: 53-56.

Simons, F.S. (1964), Geology of the Klondyke quadrangle, Graham and Pinal Counties, Arizona, USGS PP 461.

Rocks & Minerals (1985): 60(1): 5.

Phillips, K.A. (1987), Arizona Industrial Minerals, 2nd. Edition, Arizona Department of Mines & Minerals Mineral Report 4, 185 pp.

Peirce, H. Wesley (1990), Arizona Geological Survey Industrial Minerals card file.

Niemuth, N.J. & K.A. Phillips (1992), Copper Oxide Resources, Arizona Department of Mines & Mineral Resources Open File Report 92-10: 15 (Table 1).

Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 124, 174, 183, 206, 208, 299, 301, 330, 411, 421.

Heylmun, Edgar B. (1998) Table Mountain District, Arizona. International California Mining Journal, Nov. 1998: 26-27.

MRDS database Dep. ID #10103736, MRDS ID #M050053.

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