Mossback Mine (Gladys Mine; Alice B. Mine; Ida Mine; Mossback Extension Mine; Gold Reed Mining Co. Mine), Mossback vein, Oatman, San Francisco District, Oatman District (San Francisco District; Union Pass District), Black Mts, Mohave Co., Arizona, USA
‡Ref.: Wilson, E.D., et al (1934), AZ Bur. of Mines Bull. 137: 98-99; Ransome, F.L. (1923), Geology of the Oatman Gold District, Arizona, USGS Bull. 743: Plate 1; Gardner, E.D. (1936), Gold mining and milling in the Black Mountains, western Mohave County, Arizona, US Bur. Mines Info. Circ. 6901: 33; Schrader, F.C. (1909), Mineral deposits of the Cerbat Range, Black Mountains, and the Grand Wash Cliffs, Mohave County, Arizona: USGS Bull. 397; Ransome, F.L. (1923), Geology of the Oatman Gold District, Arizona, USGS Bull. 743: 30-50; Cunningham & Butler, AZ Bur. Mines Bull. 137; USGS 7.5 minute Oatman topo. map; Bur. Land Mgmt. District map; AZ Dept. Min. Resources (ADMR) Householder map, AZ Dept. Min. Resources (ADMR); AZ Dept. Min. Resources (ADMR) Mossback Group Mine file; AZ Dept. Min. Resources (ADMR) Mohave card file; MRDS files #10027927, 10234386 & 10162238.
A former underground Au-Ag-fluorspar mine located in north-central sec. 28, T.20N., R.20W., about 2¼ miles East of the Moss Mine and NNW of Oatman at about 2,400 feet of altitude. Discovered and started in 1863 the Garry Mining Co. Operated 1933-1935.
Mineralization is the Mossback vein, which strikes NW-ward and dips 80º SW. The hanging wall is Moss Quartz Monzonite-porphyry and the footwall is Oatman Andesite. The vein filling is calcite, quartz and brecciated andesite. The vein is 23 feet (7 meters) wide at the surface. The best oreis associated with slicified areas.
Workings include a 330 foot deep shaft (before 1907), that was deepened to 700 feet (1918-19).
| Calcite|| Fluorite|| Gold|
3 entries listed. 3 valid minerals.
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