File:The quicksilver resources of California (1903) (14783326862).jpg

Identifier: quicksilverresou00forsrich (find matches)
Title: The quicksilver resources of California
Year: 1903 (1900s)
Authors: Forstner, William California State Mining Bureau
Subjects: Mercury mines and mining Mines and mineral resources Mercury ores
Publisher: Sacramento, Calif. : W.W. Shannon, supt. of State printing
Contributing Library: University of California Libraries
Digitizing Sponsor: Kahle/Austin Foundation and Omidyar Network

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0°, carrying cinnabar associated with silica and oxidesof iron, oxidation product of iron sulphides. Tunnel No. 2, on opposite side of the gulch, after passingthrough 10 feet of surface serpentine enters into sandstone.This tunnel has a course south, 60 feet long; 20 feet in a sidedrift runs S. 45° E. about 30 feet, which cuts a narrow seamof ledge matter, course S. 20° W. The breast of the tunnelfollows for some feet a fissure from 18 to 24 inches wide, carry-ing cinnabar, the gangue being a dark yellov, ochery material,indicating that the unaltered ore will be found to carry a great (119) 120 QUICKSILVER RESOURCES OF CALIFORNIA. amount of iron sulphide. About 2 feet from the breast is ashaft 30 feet deep on a narrow seam of ore. A little above a line from Xo. i to Xo. 2 in the gulch is anopen cut 8 feet deep, showing fissures in the sandstone, dip-ping northeast, filled with silica and seams of cinnabar asso-ciated with iron sulphide. FIG 44.FLAN or n£X/CAN M/NE F/?fSNO CO UN TV
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Below and to the northeast of these works in the gulch aretwo tunnels: Xo. 4, running N. 10° W., 75 feet; then S. So*^ \\.,50 feet; projected to reach under Xo. i. This tunnel is entirelyin slate, but at the breast sandstone is coming in the roof. Thelower tunnel, Xo. 5, 300 feet long, course nearly east andwest, is entirely in slate. Xeither of these tunnels has reachedthe ore deposits as yet. FRESNO COUNTY. 121 Providential Group*—Owners, Thomas Flint, J. J. Croxon,B. P. Stephenson, N. C. Briggs, A. Johnson, B. Vargas, of Hol-lister, San Benito County. This group consists of seven claims.(See map of Little Panoche Mining District.) The country rockis metamorphic sandstone intermixed with some shale. Thestrike of the sandstone is prominently north and south; thatof the shales east and west. The sandstones and shales havea bluish-gray color. In the sandstone occur narrow, irregularseams of white quartz. A more or less intricate system ofleached zones runs through the sandstone, whi

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