File:Report of the State Mineralogist (1892) (14595974790).jpg

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Identifier: reportofstatemin17cali (find matches)
Title: Report of the State Mineralogist
Year: 1892 (1890s)
Authors: California State Mining Bureau
Subjects: Mines and mineral resources Gold mines and mining Mineralogy
Publisher: Sacramento : California State Mining Bureau
Contributing Library: University of California, Davis Libraries
Digitizing Sponsor: University of California, Davis Libraries

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o compartment shaft sunk to a depth of1000 feet on the vein (incline on 69° to 450 feet, then flattens to 39degrees to the 1000 foot level). At 950 feet the shaft goes into thefootwall, and a short crosscut to cut the vein. Mine practically stopedout above the 800 level. Between 900 and 1000 levels two large blocksof ore have been developed, one east of shaft 200 feet long and 4 feetwide, other west of shaft 200 feet in length and 5 feet in width. Eastof shaft the vein is intersected by a series of north and south cross veinson breaks; at a number of places the vein has been faulted. On the900 level the vein is drifted on about 1000 feet. Ore treated in 100-tonconcentration mill, said to have averaged 6 to 7% W03. Concentratesaverage 60% W03. Phosphorus content averages .12% and must bereduced to .04%. Sulphur content must not be over 1%. To reducethe phosphorus content, portion of concentrates are treated in vat with SAN BERNARDINO COUNTY.. 371 IJLj X o ^ i < -J ~t9J.9/q tfJn)9JJ
Text Appearing After Image:
I § % 1 Ink ! 5 k cukkj V 1 OJk s3 3 I N J PI**> 1 5Qj 1 1 1 C.55 1 I 1 -SI -0 4 1 1 V <utsoj-< i.; s 5 s 1 v1 01 N * £ V § ^ CI ^k^ ^ •v % ^ ^« ^ fcj > ^ Gi ^» >. Cr- +> -0 N Oo O $ $ in -9 S S (JO 1*: 0 Sk* 372 MINES AND MINERAL RESOURCES. solution of H2 S04 and H. CI. Steam heated to 97° C. Liquid decantedand four washings of water applied. Then the concentrates are driedand introduced to reverberatory furnace to get rid of sulphur content.This being reduced to 0.16% S. Capacity of furnace 10 to 12 tons per24 hrs. Owner, Atolia Mining Company; E. C. Voorheis, president;E. A. Stint, secretary, Humboldt Bank Building, San Francisco.

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https://www.flickr.com/photos/internetarchivebookimages/14595974790/

Author California State Mining Bureau
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(Reusing this file)		 At the time of upload, the image license was automatically confirmed using the Flickr API. For more information see Flickr API detail.
Volume
InfoField
v.17
Flickr tags
InfoField
  • bookid:reportofstatemin17cali
  • bookyear:1892
  • bookdecade:1890
  • bookcentury:1800
  • bookauthor:California_State_Mining_Bureau
  • booksubject:Mines_and_mineral_resources
  • booksubject:Gold_mines_and_mining
  • booksubject:Mineralogy
  • bookpublisher:Sacramento___California_State_Mining_Bureau
  • bookcontributor:University_of_California__Davis_Libraries
  • booksponsor:University_of_California__Davis_Libraries
  • bookleafnumber:396
  • bookcollection:caminesgeo
  • bookcollection:ucdavis
  • bookcollection:americana
Flickr posted date
InfoField
30 July 2014


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