File:The copper resources of California (1905) (14781756671).jpg

Identifier: copperresourceso00auburich (find matches)
Title: The copper resources of California
Year: 1905 (1900s)
Authors: Aubury, Lewis E., b. 1862
Subjects: Copper mines and mining Copper ores
Publisher: Sacramento, W.W. Shannon, Superintendent State Print.
Contributing Library: University of California Libraries
Digitizing Sponsor: Kahle/Austin Foundation and Omidyar Network

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onounced in this part of the belt. The strikeof the ore body can be readily traced around the mountain sidefor fully 2400 feet. Two tunnels have been driven, one on thenortheasterly and the other on the southerly portion of theground about 1600 feet apart. Tunnel No. i is in 140 feet andhas reached ore at a depth of 80 or 90 feet. Prospect shaftssunk on the croppings above the face of this tunnel indicate awidth of at least 35 feet. At a depth of 20 feet in the shaft,ore reported to assay 8 per cent was encountered, and the sul-phide ores encountered in the tunnel below this shaft showvalues reported at from 6 to 14^ per cent copper. The first90 feet of Tunnel No. i was driven through a secondarydeposition caused by leaching of the ore body. This carriedsome value throughout. The next 50 feet passed through aquartzite foot wall intersected by numerous seams bearing sul-phide ore varying from a few inches to a foot and a half inwidth. Between the foot wall and the solid sulphide body a
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(89> 90 THE COPPER RESOURCES OF CALIFORNIA. breccia carrying a high percentage of copper sulphide wasencountered. Tunnel No. 2, 1600 feet to the southwest, is in 75feet, but has not yet reached the ore as exposed by the prospectshaft on the line of outcrop. Native copper is found in theseams formed in the foot wall. The Summit mine is beingdeveloped under bond by the Mount Shasta Gold Mines Cor-poration of Chicago; Frank E. Ware, general manager;M. E. Dittmar et al., of Redding, owners. Ferguson & Limbough.—This group, in Sec. 4, T. 33 N.,R. 5 W., is developed by 165 feet of tunnels showing some ore. Great Verde.—Eleven claims in Sees. 11 and 12, T. 33 N.,R. 6 W.; owned by John -R. Lisle et al., of Redding. Two hun-dred feet of tunnels open into an ore body of undeterminedextent. The gossan outcrop is 60 to 80 feet wide. Graves Group.—Immediately to the south of the Summitgroup is located the Graves group of mines, owned by R. M.Saeltzer et al., of Redding. This property

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