Hackberry Mountain District
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Gold and copper have been mined in the Hac berry Mountain-Von Trigger Spring area of eastern San Bernardino County, about 25 miles south of Ivanpah. The principal sources of production have been, the Leiser Ray, True Blue, and Von Trigger mine. The mines were intermittently worked from the 1890s through the 1940s, but the most productive period was 1904 to 1915. The deposits consist either of mineralized shear zones or gold- and copper-bearing quartz veins in gneiss and schist. Yellow cuprodescloizite, a rare vanadium-bearing mineral, has been foun at the Leiser Ray mine.
Hewett, D. F., 1956, Geology and mineraI resources of the Ivanpah, quadrangle, California and Nevada: U. S. Geological Survey Prol Paper 275, 172 pp.
Ver Planck, W. E., 1961, History of mining in northeastern Sar Bernardino County: California Div. Mines Mineral Inf. Service, vol. 14, no. 9.
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