Weekly journal-miner., 1919-01-15

! development " Jrk IS Tn chaF9e Of J. D. Warvig.
 The sLaf: al ,ne Kay mine has reached a depth of 600 feet and ore mas been coming in as was expect sd which shows that the large body of ore which has been so extensive fly developed on the 50O-foot level, is widening out with the increased depth. When the shaft reached the 65O-foot level, extensive crosscutting and drifting will be carried on again. This work will be extremely ifter' esting for there mas already been developed a remarkably large ton mage on the different levels above. Work has commenced at the north shaft which is about 1000 feet north of the main shaft. It isSbelieved that another mine will be developed at this place
 The Arizona Binghamton Copper Company has issued to it's stock holders a very interesting folder set ting forth tne results of a recent meeting of the directors of the com pany which decided to increase the capital stock from $l,7W,000 to s. | 100000: to sink a new 3-compart- ment shaft and build new mill and copy of a report made by Horace | V. Winchell, one of the best known mining engineers and geologists of the country, was included in the re- port.
 The company has been operating copper mine about six miles north east of this place for over two years, the ore being chalcopyrite copper with a small amount of silver. An oil Notation mill has been used to treat the ore which has an average capacity of about l50 tons per day. The report shows that about 90OOO tons of ore have been nilled and 922 tons of high grade have been sent to the shelter which shows total production of close to 5,O0,OOO pounds of copper, representing a re- covering of nearly per cent. It has been profitable to treat ore as low grade as two and one-Quarter per cent.
 There are in reserve, according 10 Mir. Winchell, about 100000 tons of 3 per cent ore and about 150,0O0 tons of a lower grade, all above the 60O- foot level. The mine has been de- veloped on the strike of the ore about 400 feet. On the strength of this engineers report, work is in progress on new Accompaniment shaft which will reach the 75O-foot level about the first of June. This will give the mine an increased ton mage so that new mill of $50 tons or more will be warranted. The flow sheet will probably be the same as in the present mill for the oil Notation process mas proven to be especially we'll adapted to this class of ore.
 The success of the diamond drill method of exploring new levels of a mine in search of ore bodies has been proven in this mine. The Canhon Brothers have drilled about 60 holes l in, the past seven months. The holes are run as crosscuts every 100 to E150 feet apart from. drifts which fol low the formation in a northerly and southerly direction. One lense oi ore was struck only two feet in from the drift by the drill and anothet | large ore body was found 25 feet away from the drift which had been passed by in old workings. This method of prospecting has been found to be much cheaper and more effective.
 The Winchell report is of espe- cial interest to mine owners of the Jerome to Phoenix" belt for it was made in a developed, producing mine where the ore lenses, faults and gen eral formation could be followed. A portion of the report states: "The oxidized zone extends to depth ot
  about co feet Beneath this, there is a very shallow zone of secondary enrichment and below that the ore i is primary. The geological charac- ter and probable genesis of these ores is such as to indicate indefinite downward extension and there is ev- j cry reason to believe that future de- velopments to great depth will dis close the existence of even larger ore bodies than those now being worked. The developments prove the presence of valuable series ot ore lenses and indicate the existence of a permanent mine. The extent of l r,ineroIization and quantity of ore