Show S MINING MATTERS J an Inte interesting paper at AS a meeting meo ting last mouth laonia at wil viv kes kea barre pa la l a of 0 the american lu in hilmae of milling engineers fred 1 T r williams vi lliams ane weli minnia 16 engineer engl neer of 0 tho the daly avest vest had a vely able paper on mining at ai park city it is tilled filled with va valuable information the latter laiter part ol 01 the paper giving a detailed account I 1 of in ali of labor cost cost 1 I operating machines explosives lumber and timber hoisting supplies etc in his introduction the gentleman has the following to say about city its formation etc the park city mining milling district is distinctively distinct vely a camp of few properties acres or one third of the entire district being under the management 0 f but three companies As a rule the ore bodies lie deep with no outcrop except where here erosion has haa formed the deeper canyons and gullli es ontario canyon exposed the famous is ontario ledge and woodside gulch showed the first ore of 0 the sliver king coalition mine the quincy ore bodies were first brought to light in upper empire canyo nani thaymer canyon was instrumental in aming adding the prospector during the early days of the there are 22 shafts which haqq reached a depth of LOW ft five a depth of 1300 ft and two a depth of 2000 the amount of lateral development develop men mea has been proportionally extensive including six long gunels tour four of which are am in 3 miles with a kittli now being driven the ontario low er drain tunnel is is now more than 4 miles long llie formations are sedimentary dipping about 30 00 degrees N W and N and traversed by many fisser s dikes and faults the prin principal cipa I 1 ore bodies are found associated either with he contact of the basal io quart quartzite z ite and th the 0 overlying limes or on a quartzite stratum within tha limes or in the fissures or along some of the porphyry dikes the tha I 1 district covers the intersection of I 1 the uintah and wasatch ranges which explains the existence kofl of 1 large folds and faults and fissures of great length i width edth and depth i jn in a general way the geology of the district consists of a basal quart zite dome which has been exposed by i i erosion at the ontario property Thal the ontario fissure lies entirely within this flanking this dome on the west north and east lie the park city lime stones dipping I 1 about 30 deg towards the NV N na I 1 I 1 and NE respectively w ith an averi aver i 1 I 1 ages thickness of ft this tor for mation is upper carboniferous and is tha home borne of the most valuable deposits above the paik city formation I 1 there is 1100 ft of woodside the import nace of these impervious to the underlying limes is readily seen above the occurs the hhaynes canyon lime formation which is secondary in importance to the park city limes as an ore bearer this formation wa classified by king as bermo carboni ferous erous it has a thickness of I 1 1203 feet the description of the ores given by mr boutwell in 1903 haill holds good though we are now I 1 big more on the low grade milling ores tor for our than um ul u m lie he high grades of earlier days th ores are essentially ar gentiL ecil 0 o i lead ores with accessory gold and copper and a siliceous gangue the values in the sulphide ore lie in galena and pyrite pyrl leand and in the oxidized ore in glemite gle site azurite malachite and complete oxidation products silver has also been found in its is native state zinc is a common associate in fis sure ore barite and fluorite occur sparingly an average high grade c carries arries about 60 oz of silver 40 pr per cent of lead leaa oz of gold and 23 per cent of coppol ordinary crude shipping oie will average 50 oz or of silver 22 per cent of lead OOS oz of gold and 15 per cent of coppe some zinc occurs with these two classes of ores but the smelters shelters sm elters do not pay tor for it the ore will average from 10 oz of silver I 1 per cent ot of I 1 lead ead and 10 per cent of zinc up to the values of the crude ore the fissures were the main mahl avenues allowing great freedom to the mineral bearing solutions as th they ascended through the quart and limes to the surface I 1 believe that the iho ore deposition ot of the district i Ss is genetically connected with the vast vast masses of 0 existing at great depths both and me meteoric teorie waters probably played part in redistributing the values the porphyry dikes ot of the district are of two ages the older being of the tha same age as the fissures and in some instances playing the same role in circulating values the younger porphyry dikes were formed subsequent to the most active period of uplifting and and aro are barren replacement deposits are found where the fissures cut the limes deposits e of the fissure type in some same instances aro are not exhausted at a depth of 2100 ft while the replace ment deposits have been followed for more than ft on the dip of the lime beds the tha ore bearing solutions solution ns carried r silver lead zinc iron fron and an d some gold all in primary combination under tinder the influence of the oxidizing agencies agen cles the zinc and iron gave way differentially enriching th the lead which does not oxidize readily that lead which does oxidize is the first to re precipitated thus enlar enlarging g the original lead zone iron is then re precipitated below the leali lead zinc re precipitates last and is found at the deeper levels while it is desirable that data ot of mining milling costs should cover comer large tonnages ton nages I 1 have preferred in instance stance ri to take lake a number of representative senta tive headings giving a braaf description of the conditions obtaining at each place that the reader can form a better idea in this than in any other way of the work done the data hero here given have been furnished by the operations of one I 1 ot of the large producing mines and are fairly representative for the district other properties may have enjoyed lower costs due to the opening of oc large homogeneous ore i bodies but such conditions are more or less exceptional and temporary the total cost of development work in the mines of the district ranges from to per ton of ore produced the total cost of sloping ranges from 1 57 to per ton these high costs are due to the following conditions 1 the I 1 irregularity of the ore deposits in the limestone beds which must be followed tor for long iong distances in a manner which precludes ec economy ono my 0 of I 1 development 2 great vertical ani 11 horizontal distances from the main haulage ways to the tha surface surface athe 3 the necessity of separating at the mines the smelting smelling sm elting ores the malling breand waste in mining the high grade carbonate ores it is our custom to stay with the ore in its wander 1 ings a long along the file beds and to I 1 take it all out as we jo go this makes it possible that a very bale deposit maa nia have bave but one small face exposed at any one time which is perplexing to examining engineers who nho wish nish to block out a tonnage ie the operation of hie larger mines there leive been long periods during which alere was practice tc ticy jy no ore in hi sight y vf 1 tho usual production and p pi ofil have been maintained it is ra ravier ier an exception when any considerable tonni tonnage e can be blocked out such a condition occurs sometimes in deposits of the fissure type the california I 1 W 1 I snyder was up at the calli california I 1 again this week to a record man he said that while just at this time he had nothing to give out for publication yet plans were under way to finance property and resume work mork in the near on a larger scale than ever it is the wash of 0 all that the plans wll wall mature rapidly the new york conditions are interesting at the new york bonanza A tine fine showing of good ore is in the and another shipment will soon follow it 1 1 1 1 surey surely lo books as though good news wll wail be coming down dowa regarding the new york within the next few days the kennelly group C J hall who has a lease and bond on the kennelly group was r an in town this week getting supplies aie reports a small force at at present with a showing that will a material increase before man weeks he is very optimistic and T promises the record a good story before long the new mill faill this week workmen commenced th erection of a small mill near the old ontario mill which will work over the tailings and save the large quantities of quicksilver that is known to be in the dump mill dent sherman of the daly west fiill N ill t direct operations CROSSCUTS superintendent E L of the daly west left fi friday day afternoon frei no on fa nevada where v bere iere he will spend a couple of weeks inspecting mining in property la in which he and others are interested in surveyor C P brooks returned to salt lake yesterday afternoon after a several days stay in the paik shipments silver king daly west daly judge dily daly judge zinc 20 1 king consolidated total i |