. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. igher. There are ten unpatented claims, first located overthirty years ago, but not much work done until 1903. All the gulchesbelow have been placered. The vein is flat, with occasional rolls and troughs and a slight dipto the south (see sketch map). The country rock is granite, thehanging-wall being softer and more decomposed than the is an impervious clay gouge on the floor, which apparently pre-vented the waters, circulating along the fissure, from going int
. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. igher. There are ten unpatented claims, first located overthirty years ago, but not much work done until 1903. All the gulchesbelow have been placered. The vein is flat, with occasional rolls and troughs and a slight dipto the south (see sketch map). The country rock is granite, thehanging-wall being softer and more decomposed than the is an impervious clay gouge on the floor, which apparently pre-vented the waters, circulating along the fissure, from going intothe granite below. The vein is from a few inches to 2 feet in width,and the gold is principally free, with some pyrite. High values areoccasionally found in ochreous bunches. In the northern part of thearea shown in the sketch map, outside of the vein as indicated, no gougeor mineralization has been found. The vein does not come to thesurface on the north side of the hill. The dikes are aplite, and dipsteeply to the north, the south one being displaced by the vein. Both 30—27278 450 MINES AND MINERAL FRESNO COUNTY. 451 dikes are faulted by a heavy vein of bull quartz, which strikes north-westerly. The drift at A is being driven to crosscut the northdike and ascertain if the flat vein stops altogether or dips to the north-west and goes down steeper. In the decomposed granite, which is partly granular in places, theyuse a IJ-inch auger with ratchet and pressure drill. From 35 to 50feet of holes per man per shift are drilled, and a special low Hercules15 per cent powder is employed. In stoping, the ground is allowedto cave behind the work. The milling equipment includes a 2-stampKrogh mill, with amalgamated plate 4 feet by 10 feet. Power isfurnished by a gasoline engine. Six men were at work in July. Themine is credited with a total production to date of approximately$40,000, of which $17,000 was taken out from a single pocket andreduced in the arrastras. Temperance
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Keywords: ., bookauthorcaliforn, bookcentury1800, bookdecade1850, bookyear1853
