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Show I aALY-JUOGE MI Klines and Minerals Contains ' Interesting Account of Park : City Property. EACH" DETAIL CLOSELY : ' ' COLLECTED AND DESCRIBED Geological Conditions of the Camp Are Given the Closest Attention. .The following Is a portion of the article-by Messrs. Gow, Howat. Kruger and Parsonc on tho Daly-Judge mine unci mill In J-irk City. The article appears in the August number of "Mines and Minerals." A Httlp knob of ore sticking: soma two Inches above the surface of the ground led to tho rJIncovery In June, 1S72. of tho great Ontario property, which has since produced in silver 434.000.000. Rector Rec-tor Stein, the discoverer, tells in his own words: '.'We scraped tho dirt off: along the lead for a distance of 50 feet. On tho surface It was about IS inches wide but when sunk on S feet down It narrowed nar-rowed to S Inches. We had tho rock as-Fayed as-Fayed and it went from $100 to $100 per ton." Although mining had been carried on in an intermittent manner In the Mc-Hcnry Mc-Hcnry and the White Pine properties, the discovery of rich lodes In American Fork, Big Cottonwood, Little Cottonwood and Snake Creek canyons tended to draw tho attention of prospectors away from Park City, so that actual mining is said to have begun with the discovery of she Ontario mine above described It was sold, August 21, 1S72. to Messrs Hearst and Stanley for $30,000. Shaft Xo. 1 was started In April, 1S7S; since then shafts N'o. 2 and is'o. 3 have been stink, tho deepest of which Is 2000 feet. The success suc-cess of the Ontario 6C stimulated tho Interest. In-terest. In this locality that in 1SS0. 127S mining elaljns were registered. Success attended the operations In the camp until un-til the year 1Sy3, when the slump in silver sil-ver seriously impaired the production. Improvements in metallurgical processes, however, the high grade of the ores and tho Increase In value of lead permitted an early resumption of activities. The more Important mines at present are the Daly. Judge, paly-West, Daly. Ontario. Silver King. LlUle Boll. American Ameri-can Flag, J. I. C . Nalldriver, Thompson, WSjl Keith-Koarns. Crescent. California and Comstpck. The production of five of (r! these mines the Ontario. Daly-Judge. I Daly-West, Duly and Silver King up to WL 1002 exceeded ?75.ono,000. Situated in tho ISm Uintah mining district, 2 miles sou th ug cast of Park City, Is the Daly-Judge Vj: property with which this article deals. k' Discovered in 1SS5. its company was In- 9fc corpornted under the laws of Now Jersey JR In I90J. with a capital stock of 150,000 w' shares- JL Daly-Judgo Mine. , In developing tho property, a strong- i U ly-defined llssuro. striking norlheast- southwest, with a nearly Vertical dip. wns ml. oncounterod and from the nnturo of tho M ore the management was convinced that 11. a large body would be. met with at a 'It-' - depth. Deep mining, however, would ne- c'cHsitate heavy expense in operation and Jp' the Installation of now pumping machln- fi , ery. Under those considerations it was t decided to effect a merger with the An il! rhor property, as at this time the deeper Vft workings of tho Anchor were rapidly ap- afi), ' proachlng th.es Daly-Judge lines. Connec- rBi tion of tlie workings would not only drain I'D ' the Daly-.Tudge. but ufford an cconomlcul f, . method of ore transportation through the A ' Anchor tunnel. Tho Anchor property was .3 ' purchased in April. 1902, without the 'I privilege of evamhiatlon or sampling- J This purchase made the company ilie 1 4 . sole owner of 12S patented claims and a 1 i ' 20-acro mill site, embracing an area of l j; 1000x13.000 feet, making a total of 1215 I ?j' acres. The capitalization of the Ualy- 1 71 Judge Mining company was then raised jj from 1&0.000 to 300,000 shares at a. par II f value of $1 per share Subsequent to the Jill " purchase, the Anchor workings wore 10 found in poor condition, many of tho drifts lilt requiring enlargement and retlmbcrlng. Ir1 Tie shaft was enlarged from I to 5 feet, Hp! ' the Anchor tunnel retlmbercd. and many It. of the snrfnee buildings, including the mill, were remodeled and enlarged.' The .' Anchor shaft of the Daly-Judge mine Is B; situated at the head of Empire canyon, t lie collar of the shaft having an elevation Ml of 9200 foot. The shaft house is a large li frame building 75 feet high, 120 feot long, W and 100 feet wide. In connection with g' i the .shaft house are the boiler room and fL blacksmith shops. The shaft house con-I con-I tains the head-frame, tho hoist, two air A compressors, Westlnghuuse dynamo, j I Westlnghouse vortical engine, four boil-Jj boil-Jj ii ors. Ward drill sharpener, and the forges. , ii The hoad-frame is an all-timber, two- 1 post frame, ,"S foot from collar of shaft T ! to conter of sheave. The sheave wheels I arc built for flat eablo and are 7 feet in i t diameter with a. 7-Inch fnce. The 18x00 m liolst Is of tho first -motion duplex type. equipped with friction brakes, built by 9 the Bullock Manufacturing company. Air I E at Sp pounds pressure la furnished the drills by a 20-drlll duplex, a 6-drllI In-gersoll-Serccant compressor being held in reserve. Steam is supplied by four 00-) 00-) hor.'sepower return tubular boilers fitted I K with American stokers. A lfi-horsopowor Westlnghouse dynamo furnishes current at 125 volts for lighting the buildings. The Ward drill sharpener opornted by compressed air sharpens 150 pieces of hand steel and 150 pieces of machine stool nor day. At the portal of the Anchor tunnel are situated tho offices, machine shops, blaoksmilh shop, timber shed, and carpenter shop, together with the six hlns of 1000 tons storage capacity for the first-class first-class ore. The company's reservoirs, lo- rated on Bonanza Flat, furnish an ample WRt$r supply. Mine Openings and Development.. , The anchor shaft and the Anchor tunnel are tho main openings of the mine. Shafts. Tho thrco-compartinent Anchor , Hhaft Is. vertical, having two hoisting compartments, -11 ft. x h ft. In the clear I and a ladder compartment, 3 ft. x 5 ft. In J i tho clear, carrying a 1-inch nlr and a I i-neh water pipe. It is timbered with 11 lixH-Inch Oregon fir sets spaced on 5- . feet centers and lagged with 3-Inch ; , planks. Double-decked steel cages are i in use. The shaft has been sunk to a B depth of 1650 feet, the cost being 3-iO per m foot. The stations are 13 feet wide by 15 .1 feet high In the clenr, timbered with 12x V J 12-Inch pine sets and floored with H-inch sheet steel laid on plunking. Tho electric current, nuppliod at I2fi volts for lighting K the stations. Is generated by a small 5-y 5-y Horsepower dynamo speeding at 13S0 rcv-m rcv-m olutlons per minute, belt connected to a (i Pelton waterwhoel located on tho 1200 lijo level. The mine drainage water Is col- s lift lectcd on the 500-foot level and Is con- I Hh ducted to the watcrwheel, 700 f et below, I Vfti . through a n-Inch pipe, j Tunnels. TJio main haulage way of ifjin the mine Is the Anchor tunnel, fiflOO feet illlK In length, driven southwest from II por- iJ3p tnl In Empire canyon to connect with the yljajl Anchor shaft, on its 1200-foot level. It mMi was driven 7 ft. x 9 ft., thus allowing Jflai 5x7 in the clear after limbering, although 111 I, tlii.1 hard Carboniferous limestones, shales. llnJ and porphyry dikes encountered required llffi but little. The ro.-a of the driving done under J. .1. Daly Is given as $1S per fool, ijljir The tunnel Is Moored with 3-Inch plank lK over the 2 ft. x 1 ft. drain. At prosent HllW It is single tracked with 20-pouncl rails; mUm electric haulage Is contemplated for the (IsJIB- Drifts-. A total of S miles of drifts has mnWl been run' on the following lovols at an HIIIP. average com of 512 per foot: The 500-. jCT. 700-..900-. 1100-. 1200-. 12C0-, 1300-. 1100-. Pfjjf: . 3500-. and H500-foot levels, the drifts be-MlJi be-MlJi r ini? Ci ft. x 7 ft, in the clear. These fjnl ' openings nro driven-In shales and ltme-il ltme-il j Hton-is of varying texture in the upper Mljfl lovels and In quartzltc on the 1000-foot ijkllj level. Tlit- ground I of such n nature at rjtjj.l ! to require little Umbering. The mine has HjH'J , V been opened up to the west boundary of Wv Daly-AVest property. In order to reach the western boundary of tho property prop-erty it will be necessary to extend those drifts 21 miles along the mineral belt. This entire area is virgin ground save a small portion which has been prospected by tho Jones Bonanza shaft. Only 90 or 100 acres of the 1215-aerc tract, or about 7 per cent of the company's holdings have thus far been developed. Winzes. A total of 4 miles of winzes has been driven, usually in the ore bodies about 100 feet apart. Mine Structural Geology. Before proceeding to a description of the methods of mining and prospecting, a brief review of the local geology is cs-sontlal cs-sontlal The rocks encountered in the development develop-ment of the mineral belt of this section consist of limestones, shales and quartz-ites. quartz-ites. occurlng In alternating beds of varying vary-ing thickness nnd character, cut by lgneoti9 Intrusions. Two formations occur. oc-cur. namely: upper Carboniferous and lower Carboniferous. The upper Carboniferous Carboni-ferous consists of beds of shale, black limestone, marble and gray limestone resting on a bed of ehorty limestone. 100 feet thick. Below this occurs the lower Carboniferous which Is nearly conformable conforma-ble with the upper Carboniferous, and consists of 1700 feet of qitnrtzltc. locally known as the Ontario quamlte, underlaid under-laid by a bluo limestone of "unknown thickness. In the Daly-Judge property tho upper formation extends to a depth of from 1200 feet to 1500 feet below Ihc collar col-lar of the Anchor shaft in tho wostorn portion of tho property. The blue limestone, lime-stone, lying below the Ontario quartzlto, has been encountered In the lower workings work-ings of the Ontario and Daly mines, but has not yet been reached in the Daly-Judge, Daly-Judge, whore it lies from 2000 to 3500 feel below the surface. The beds dip In a general northwest direction at an angle of from 30 degrees to 30 degrees and are cut through in various places by Igneous Intrusions. These igneous Intrusions In-trusions occurred previous to tho vein Assuring and the deposition of the ore, as is evidenced by the faulting of these dikes by the vein fissures. Regional motn-morphlsm motn-morphlsm resulted from these intrusions; the limestones were bleached and convened con-vened Into pure white crystalline marble, while tho qunrtzltes sulfcrcd a similar metamorphlsm. and due to this bleaching bleach-ing they resemble the marble to such an extent that it Is often necessary to test their hardness in ordor to distinguish them. While these dikes themselves are non-ore bearing, they had somo effect In tho subsequent mineral deposition. By cutting through and fracturing the strata, these Intrusions opened tho rocks for tho mineral-bearing solutions. Following these disturbances occurred the general faulting and fissurlng of the strata. Those fissures have a strike of from N 20' degrees E to N fiO degrees E. and produced extended block faulting. In the Daly-Judge property these flssuros may he dividedinto threo groups, us follows: fol-lows: (1) The Daly and Ontario veins or fissures which strike northwest-southeast, and din to the north. (2) The Mc-Sorley, Mc-Sorley, Back and Curtis veins, which strike NT 20 degrees E to N 00 degrees E and dip southeast at an angle of about 60 degrees." (3) The Roll Fissure, Sulphur, Sul-phur, Martln'B and Kelly's veins, which strike N CO degrees E to ID and dip to the south, uniting on their strike and dip with the fissures of the first two groups. Tho blocks themselves have been faulted and fissured, verticals being produced by torsional stresses cnused by Irregular movements of the blocks. Those verticals verti-cals dip at right angles to the bedding of the strata and in general have a reverse re-verse direction to the dip of the main ore-bearing flGsures. By the nature of their formation It can readily be seen that these verticals will be confined to the different blocks, and will not pass the main fissure.3 "which bound these blocks, so that each ulock has developed within it its own systttn of verticals. These verticals ver-ticals often radiate from a common center, cen-ter, uniting with other verticals and forming a most complex network. While the main faulting fissures are roughly parallel, the vortlcnls strike In different directions but unite with tho main veins at acuto angles varying from 10 degrees to 20 degrees. Their width varies from a few inches to A or 5 feet. In places where several verticals havo united, there has often resulted an ore-bearing ore-bearing vein closely resembling tho veins of the second and third classes mentioned above. In the Daly-Judge v mine thero are three systems of this block faulting, forming three troughs or ore channels. Thi' north trough lies betwoon the Dnly and Roll fissures and is about 250 feet wide on a line through the Anchor shaft on the 1200 level. The main trough lies between tho Roll llssuro nnd the Curtis fault and Is about 1000 feet wide. The south trough lies between the Curtis fault and the Blnck vein, nnd Is about 300 feot wide These troughs become much nnrrower In tho upper levels The depo-sjtlon depo-sjtlon of the ore has taken place according accord-ing to the law or selective deposition, which is. "That some geological formations forma-tions seom to bo entirely barren of ore: others occasionally carry small deposits, workable whore tho conditions arc especially es-pecially favorable; but In -each mining region re-gion certain strata are oro bearing In a degree exceeding all the other formations combined." In tho Ontario and Daly mines the Ontario quartzlle Is the great ore-bearing formation and forma the wall rock oft tho veins from the surfaco nearly to tho 1500 level. Tho wall rock being hard and continuous, the ore shoots aro In the form of sheets nnd are regular, continuous and of great extent. The ores are concentrated within the fissure and arc of high grade. They pinch out a.i the vein leaves the quartzlte and enters the underlying shale, but appear again as the vein enters the bluo limestone below. Above the Ontario quartzlte Is a bed of cher i v limestone 100 feot thick upon which ists a thin bod of quartzlte. Above this quartzlte occurs a. bod of gray limestone lime-stone 20 feet or more In thickness. This limestone Is very fragile, splitting at right angles to the bedding so that In the faulting of tho strata It. became cracked and broken and Is particularly favorable for oro reception. In many places it carries car-ries large deposits of high-grade silver-bearing silver-bearing galena. In the mines of this district dis-trict the ore horizons occur ono abovo tho other in beds of limestone or quartalto through which the fissures cut. The nature na-ture of the attrition material or the breccia brec-cia detached from tho walls of tho fissures fis-sures may be considered as moat affect ing the deposition of the ore In tho veins so far as any Influence of the wall rock Is concerned. Where shales form the wall rocks of tho fissures the ore is apt to pinch out but reappears where tho vein cntiTS a more favorable horizon. The breccia or attrition material, ground from the walls of the fissure whore tho vein has cut through thick shale beds, hnn packed In tho fissure and boon converted to :lnv. forming a dam through which the mineral-bearing solution could pass with difficulty or not at all, while the broc- dated limestone and quartzlte provided a coarse, loose or porous vein filling through which tho mineral-bearing solutions solu-tions could easily pass and deposit the ores. Where limestone forms the wall rock the vein generally widens out and the ore deposit Is not limited bv the walls of the fissure, but extends out Into them. As above stated, tho llssurlng, faulting, crushing and fracturing of the strata, together to-gether with the Igneous activities which occurred In the direction of the Cottonwood Cotton-wood divide, prepared the way for the mineral-bearing solutions. These solutions solu-tions which deposited, the oro in this belt . did not come "up from extreme depth fol- J lowing the fissures to tho surface, but had their origin in the foot-country to the west, and in coming to tho surface, followed fol-lowed the sunken troughs previously do- I scribed, (lowing in broad, shallow, underground under-ground streams and passing from one iKsure to another through the verticals, i The ore bodies or shoots are found to occur In the veins where they arc cut j by verticals. Indicating that the solutions I were introduced into the veins through I tho verticals. Tho verticals may therefore there-fore be considered ns the feeders through I which the mineral-bearing solution passed i Into tho V'sln.s where they worn procJpl- j lated In- places favorable -to their rqcop-tlnn- I |