Bulletin . rties in no segregated record of output is available till 1876. when themine yielded 1590 flasks of mercury with a furnace of only 15 tonsdaily capacity. The recorded production from 1876 to 1879 was 1777flasks. Xo further output is shown till 1895, although developmentwork was going on for several years previous, the failure to strike orebeing due to ill-advised mining methods, according to local work was done without much production till 1901. Inthe folloAving year the Klau was the fourth largest producer in thestate and the chief mine of the county
Bulletin . rties in no segregated record of output is available till 1876. when themine yielded 1590 flasks of mercury with a furnace of only 15 tonsdaily capacity. The recorded production from 1876 to 1879 was 1777flasks. Xo further output is shown till 1895, although developmentwork was going on for several years previous, the failure to strike orebeing due to ill-advised mining methods, according to local work was done without much production till 1901. Inthe folloAving year the Klau was the fourth largest producer in thestate and the chief mine of the county in point of output with a yield 136 CALIFORNIA STATE MINING BUREAU. of approximately 3300 flasks, as the Oceanic furnace was not startedtill the fall of the year. Work continued, with an 8-tile, 60-ton Scottfurnace and 8 condensers till 1908, in which year the only output wasmade from cleaning out old condensers. Another period of inactivityensued, and in 1911 the wooden structure over the furnace and con-. Photo No. 28a. Klau Mine, San Luis Obispo County. Old slopes and driftsexposed by later, open-cut operations. Looking northeast across thestrike of the ore zone. densers was burned (see Photo No. 56, post). The recorded produc-tion of the Khiu mine totals 14,213 flasks, to the end of 1917. There appears to be a mineralized zone 200-300 wide running-through the property N. of W., within which the ore shoots are segre-gated along two principal lines or veins. Large opencuts andextensive undergrouiul workings have beim made. The geologv of the QIICKSILVER RESOURCES. 137 mine was deserilx-d in considerable detail by Forstner,^ who states thatthere were two main ledges developed, running nearly parallel X. 50°W., dipping but approaching each other on the dip. The moresouthwesterly ledge is locally called the serpentine ledge. Its footwallis a belt of serpentine from 20-40 wide, rather siliceous in places, tochalcedonic in character. This serpentine does not appear at the s
Size: 1426px × 1752px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectgeology, booksubjectm
