Tombstone daily prospector., 1890-08-28

fifth level, and to the driving of 9
 oEoss-cut lrem the third level 10 the
 East Side vein. but smaller amounts
 Of work have been done on all of tn,
 levels, particularly the first, which
 has been extended 6S0 feet 10 tho
 south. In all, 270O feet of explora-
 ton workings have been run during
 the year Four hundred feet from
 the north end line is located the main
 working shaft, and levels have been
 run at the successive depths oi S9, IS2, 250, $40 and 4l5 feet. and wster
 reached at depth of 490 feet Icy a
 winze from the lowest level. This
 wine, however, vas sunk ten feet be low the water level, giving a total depth attained of 500 feet.
 At the extreme south end of the claim, over 1000 feet distant from the shaft and in the footwan of the main vein, are located the manganese ehin- neys from which large amount of fair grade ore was extracted for use in the furnace. It is proposed to extend the first level to 8 connection with these, and if they are found to con tinue downward with q paying grade to run one oi the lower levels to them, probably the third. as it is the farthesi advanced to the south of any.
 During the year the surface plant al this mine has been increased by the addition of an air compressor and drills moved from the Toughnut mine and sixty-horse power boiler from the Tribute, the latter requiring the of new boiler house. The drills were use in the East Side cross cut with great advantage in the saving Of both time and cost of diving.
 The Lncky Cuss mine consists pri- marily of very large Assure vein run ming nearly north and south through the center of the claim and dipping to the east at an angle Of about T0e from the horizontal. The country rock, with strike sligh:ly west of north, has an easterly dip of about 45e, and consists of alternating strata of white limestone and quarczite to the east oi tle vein and of white limestone alone to the west till the granite Is reached a. distance of 35G feet from the cen ter of the claim Another hut less important Assure branches from the main one in inc norlherly end of the claim and runs southwest.
 Tbe Assures are filled with mass Of vein matter, all carrying silver, but the pay ore has so lar been found to exist almost entirely in a series of shoots of comparatively small size but good grade lying in the veins and conforming to them in dip but pitching slightly 10 the north. These shoots are now nearly exhausted of their contents above the fifth ieyel, and up to date the efforts to follow them below have yielded anly low grade ore. The veins are large and however, at the lowest point reached and the low grade of wha: have hitherto been the pay shoots may be only local; but whatever may be the .act in this regard, their present poverty and the fact that there is but 75 feet of ground available between the fifth level and water is forcing us 10 look elsewhere for our ore supply. The ffth-Ieyel ore has been of better aver age grade in gold, silver and lead than that from nearer the surface, the rise in gold being particularly striking.
 When sinking She shaft mass oi granite was cut through between the third and fourth levels which, when first struck, was supposed 10 be the main body upon which the sediment ary rocks of that locality lie, but which subsequent work has proven to be an intrusion into the lime from the main body of eruptiye granite to the vest Ore of good grade has been Iound on both aides of this granite in Irusion, usually separated from it by a .hin belt of lime, but in one case di- -eetly in contact with it. The granite has come from the southwest, and in ts course has shattered the lime coun- 1 lry rock in every direction, producing conditions which arc thought 10 be extremely favorable to the deposition 1 ,f ore, but in situations hitherto un- sxplored in the underground work n~s. We are nox directing part of
 he work to the exploration of this r-ornd. deriving additional eucouz- |