. The copper resources of California. aresulphides, associated with iron pyrites, and carrying smallpercentages of gold and silver, with occasional traces of group of claims has been opened by five shafts and sometunnels, two of the shafts now being operative. The deepestdevelopment has occurred in the Heckla and Satellite, whichat an early period were opened to depths of about 500 Campo Seco shaft reached 250 feet and its lowest levelwas at 200 feet. One ore body in the Heckla mine was 150feet long, and the group as a whole has yielded quite Satellite has underg
. The copper resources of California. aresulphides, associated with iron pyrites, and carrying smallpercentages of gold and silver, with occasional traces of group of claims has been opened by five shafts and sometunnels, two of the shafts now being operative. The deepestdevelopment has occurred in the Heckla and Satellite, whichat an early period were opened to depths of about 500 Campo Seco shaft reached 250 feet and its lowest levelwas at 200 feet. One ore body in the Heckla mine was 150feet long, and the group as a whole has yielded quite Satellite has undergone the most extensive shaft is 550 feet deep and four levels have been opened,from which ore is now being mined. This mine was wellknown as the Lancha Plana before 1883, when it wasre-opened by H. D. Ranlett after long idleness. A tunnel wasrun to the old shaft, about 1000 tons of ore shipped, and leach-ing continued for about three years. It was then sold to theSan Francisco Copper Company, and later merged with the. c<ini;i< mimm; ldmiaxv s mini-, at cami-d skc(j.
Size: 1822px × 1372px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidcopperresourceso00auburic
