California mines and minerals . en wealth into the coffers of the owners ; butthe end came, and the mines were shut down, and have never sincebeen unwatered. The surface buildings and machinery have eitherbeen removed or fallen into decay. When closed down, these mineswere but 1,600 feet deep, and there is not a mining man in Amadorwho thinks the great vein exhausted, for unless it proves whollyunlike the mines to the southward, which, at greater depth, haveproved even more profitable than formerly, the Plymouth vein will 328 CALIFORNIA MINES AND MINERALS continue far below 1,600 feet, and be
California mines and minerals . en wealth into the coffers of the owners ; butthe end came, and the mines were shut down, and have never sincebeen unwatered. The surface buildings and machinery have eitherbeen removed or fallen into decay. When closed down, these mineswere but 1,600 feet deep, and there is not a mining man in Amadorwho thinks the great vein exhausted, for unless it proves whollyunlike the mines to the southward, which, at greater depth, haveproved even more profitable than formerly, the Plymouth vein will 328 CALIFORNIA MINES AND MINERALS continue far below 1,600 feet, and be found as rich and as large asabove. To-day the old waste dum])s are being run through Hunting-ton mills, and are paying a profit over the ex])ense of treatment,showing that in the Hush of success good values were allowed toescape. Northward from the Plymouth Consolidated, to the north countyline, a distance of five miles, the Gold Belt extends, but is practicallyvirgin territory. There are good prospects in that direction, At the Dump of the Kennedy Mink. excepting the operations at the Bay State and Philadelphia, little hasbeen done toward opening this section. The extensive development of the Central Gold Belt, in AmadorCounty, has proved several important facts. The ores are all sus-ceptible of successful treatment by the simplest metallurgical proc-esses— amalgamation, concentration, and chlorination. The cyanideprocess may be applicable also, but is not extensively in use. The veinsare continuous, easily mined, and extend to great depth withoutdeterioration in values, or change in character of the ore. Thegreatest depth thus far attained has not developed a very high tem-perature, nor an abnormal flow of water. It is the opinion of the AMADOR countys MINES 329 writer that the depth to which these mines may be worked will onlybe determined by the economic conditions, and it will not be a matterof surprise to find shafts in Amador County 5,000 feet deep, and themines
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