Arizona weekly enterprise., 1888-03-17
ANNUAL REPORT. Orfhe Silver King Mining Ce. SUPERINTENDENT REPORT.


 To the President and Directors of the Silver King Mining Company.
 GENTLEMEN: The honor of presenting to you an annual report of operations at your mine and mills in Arizona has again fallen to me, and I herewith transmit to you summary of the work performed ln the extraction of ore and its treatment at the mills; the improvements made and now in course of establishment, with the increased facilities acquired, the general condition of your property, and it's pros pective future.
 The inning operations have been car ried on without single days interrup- tion, and the amount of necessary ''dead workn performed in driving tunnels and sinking winzes, has been greater than at any previous time in the history of the mine.
 During the summer cross-cut tunnel was run from the old drift on the 119 level, to discover and prospect the ore body which evidently existed at that level, and which had been located by surveys. The ore body was encountered about twelve feet from the old drift, the tunnel traversing the north side of it 8 distance of sixty feet through baryto- quartzose material similar in character to that of the level below, and exhibiting a mineral constituency of galena, zinc blende, fahlore, native silver and chal- copyrite. The total length of the tunnel is ninety. eight feet, 1t having been run some twenty-six feet into the country rock to determine the non-existencc of any mineral bearing ground beyond the quartz. Assays of pieces of ore taken at random from the broken material var ious points in the progress of the tunnel, which would be classified as ordinary sorted ore, gave an average value of 3S 3S ozs. silye: per ton. A selected sample which contained mostly fahlore, gave an assay value of AZ. 10 ozs. silver per ton. The general showing of the ore body as exposed in the tunnel, IS fully as satisfactory as is usually dis closed by such workings in the mine, and it's length is probably at least as great as its width was found to be at the . end prospected This ground stands in- tact and should reach nearly to the sur face, or to the bottom of the old ''open pit" which is about thirty feet below the level of the collar of the shaft In the extraction of this ore, the present open ings at the 119 level will be abandoned, and the sill floor of new level establish ed which will be known as the l43 level. and operated through shaft No. 3 (North King).
 The 250 level has been actively work ed .he greater portion of the year, pro- ducing the baryto-qusrtzose ore which has been treated by the special roast chlorination and aniale amation meth o q of our min No ?. During the winter an d spring months the ore was unusually high in grade, and fifty per cenS. of it contained silver was in native form. In the month of July while extending the slope on the second floor, mass of very low grade and at times barren material was encountered, running across the leve nearly in the center, and lying at an angle of about 45 degrees with the plane of the sill floor It pitched towards the hanging wall as the stope raised, and crowded the ore body into wedge sliar. ed volume The stope was raised at the north end of the level to the top of the third floor, where the wedge shaped ore body had nearly reached its apex. Thi; principally barren mass which had cut of the ore to the north, was largely com posed of porphyry, and careful study of it satisfied me that 1t was somewhat of the nature of dike, my belief being confirmed at later period, when iti under side had been exposed the ful width of the level, and it's upper side haC been determined by raising through l (from point where it passed into anC below the sill fioor) to a new ore body or the south end of the third floor, mucl the same in general character as wa found on the under side of the dike with the exception that the ore extracted and milled, or exposed to date, has car ried nearly all of its silver in chemicall. combined form i'll the various sulphurets and has also proved more cupriferous Assays made of samples of several pounds in weight taken from the extreme soutl end of this new ground, and near tho foot wall, gave from 52 90. ozs. silve per ton, and from 6.75. per cent. t l4 per cent. of copper. Silver in nativ form has been of nfrequent occurrenc thus far. Fahlore and galena are tn chief silver bearing minerals of the ney ground, and its development has bee sufficient to expose to view body of or of considerable homogenity, 90 feet 1t greatest length, and with probable eX treme width of about S5 feet, which is tn known distance between the east and tn west walls Forty-five feet of the latte dimension has been actually exposed t, view. The work during the year ha been confined to the sill, second, thir and fourth floors, and 78, l59 cubic fee of ground were extracted. The dix which was encountered was the fir obstacle of it's kind ever met with in tn mine, and the new developments hay presented a most promising looking or body, which, when taken together wit the column of ore of similar charactC exposed during the summer on the II level, offers an ore body of approximatel one hundred and ninety three feet i height, which will take some three veal or more to exhaust with our twenty stamp dry crushing mill.
 The only work executed on the 3C level during the year, was the re-timbe ing of the shaft station, and the sinkir of an air winze from the sill floor of tl 250 level, through the ore body, whiC latter appears to be of the same gener character as that of the levels above, far as the limited amount of eXploratio can exhibit. It would seem howeve as if the same high grade ore found Tn portion of the sill floor of the 250 leve must necessarily exist, to more or le extent, in the upper part of this leve