The copper era and Morenci leader., 1913-12-19
GREAT CYANIDE MILL ID BE INSTALLED
 AT TWIN PEAKS
Cyanide Plant of Large Capacity is to Be Installed at Twin Peaks Within a Few Weeks of Tremendous Importance to Gold Mining interests
 of this Section.

the gold mining interests of this sec
 tion of Arizona and New Mexico is g the purchase at Fl Paso this week, by
 the Twin Peaks Mining and Milling
 company, and it's installation within a l few weeks at the site of the mines. ] of cyanide mill of large capacity
 For years the interests of the mining l world has been directed to the gold bearing ores of the Twin Peaks sec | tion, as there are large bodies of ore ! that are of a percentage that would l seem to promise untold production, | should the proper methods of econom- ical concentration be solved. In this | section are the famous Carlyle mines, the Apache Box mines, and number less claims that are of the same geo. logical formation, and all carrying gold impregnated ores. At various times rich veins have ben developed, 1 with great profit, notably that era of successful operation that some twenty
 years since came to the Carlyle prop
 critics, when millions of gold was
 produced, but crude methods of reduc
 tion have resulted in discontinuance
 of operations.
 Only recently a mill employing
 methods of amalgamation was install
 ed at Twin Peaks, and with this
 mill ore has been treated at hand
 some profit, but is learned that much
 of the gold, about one-half of the con-
 tents of the ores, was not secured, the
 wasteful methods Df concentration
 causing this portion to escape with the baser composition, and this per centage of waste determined the |
 management of the mines upon the |
 installation of a cyanide plant that | would properly reduce the ores, as it | was apparent that the ores treated at l the amalgamation mill would of nec-
 cessity in later years be treated a
 second time, thus causing unneces-
 sary expense. It was decided that
 cyanide plant would be the most ac- ceptable method of economical and complete reduction, and accordingly Messrs. Fraser, Bosserman, and Oates, respectively president, secre- tary and metallurgist of the company, visited at Fl Paso, and after several days of inspection selected the cyan idle mill.
 This mill has a capacity of more than seventy-five tons daily, and will be used for the treatment of ores. from the New Strike, Twin Peaks, and custom ores. It is estimated that this mill will reduce the ores so con- pletely that not more than fifty cents per ton of gold will remain after the completion of treatment. This is remarkable improvement over the method of concentration at present employed, as it is estimated that nearly one-half of or about ten dollars of gold, is left intact in the treated , ores.
 The opinion of mining men acquaint ed with these and surrounding prop critics is that this installation of modern cyanide plant is all that is necessary for a campaign of develop ment that will at last realize the most optimistic hopes of it's discover CTS and stockholders, after years of patient development and efforts to fin ally bring Twin Peaks to a stage of = profitable production. It is admitted by all conversant with Twin Peaks r that enormous bodies of ore can be :. secured there, and that all that was lacking was a reduction method of sufficient economy to make the net , result of profit.
 The new mill will be used in con- q nection with the mill at present in |. service. The crushing machinery, plant, and power plant will be retained. The shines in the i, demanded that method " of cyanidation be employed, as much h of the finer particles of gold passed n through in this form, and was lost. Q The new mill is to be used for the le treatment of ores that will average " fifteen dollars per ton. It is conser- n estimated that more than $3,- ii )OO, ,OOO % of gold bearing ore is now ie n sight at the New Strike, this is in c, addition to the ores of Twin Peaks TT nine, and this is considering only h hat ore that is above a depth of five hundred feet, at which point the sul- ,hide ores begin. This upper ore zc )Ody IS more IndH one H1he III lenSIh' W nd of a depth, average, of five hun M red feet. At New Strike shafting is kt LOW at the depth or one hundred feet, DC nd from one shaft 1evels have been w un from depths of fifty and one hun si red feet, to distance of one hundred tr nd twenty feet. The ores now ob- W aimed at New Strike are heavily as- lit ociated with hematite of iron. Twen- tn " mon arc now en1DIoyed on these +o