Show MINES AND MINING EDITED BY F F. W. W SPRAGUE BEA BEAVER VER GEOLOGY IS TREATED BY STUDENTS Thesis of Engineering Graduates Graduates Graduates ates of I Interest to M Mining World DISCUSS NOTED FAULTS Part Pari Performed by Them in inFormation n nA Formation of the Ore 4 Bodies I A school thesis of ot more than ordinary nary Interest esp especially to tho the mining t. t world I Is ono one discussing Some Somo Salient Features of ot tho the Geology of or r which was pro Pro- lre- lre Utah and Vicinity l pared ared b by six of or last years year's eals senior of or the tho University of oC Utah and Is no noW being Issued l h by them in printed form Corm The former students arc are Joseph h Jen Jen- son on It H. C Towler Ralph It H. A WoolleY Ernest S. S Bowman H. H B. B 3 Havener onor am antI received the degree V. V B. B Herbst All AU of ot Bachelor of or Science in Mining Ln- Ln irr last June Junt when tho the paper papa was yas submitted b d to tho faculty for Cor ap I nJ All of ot them are arc now con with the Uio mining and anti engineerIng engineer form earning ing I profession in some Salaries from 90 a month t tc varying f 2000 a n year The thesis was vas prepared under guid guid- a Pack the now y- y ance of ot Dr Fred J. J I appointed J ted u I professor of or f I- I I It enters Into details concerning r the rue geology of ot the Frisco mining min mm- ing district which never no before has been covered ered so PO thoroughly in fn a It technical tech tech- way To the general reader that portion dealing with the celebrated 8 t of that region will be of great- great eat cst Interest 4 Two Series of nt j k Two series Ics of faults are readily recognized rec roe In the district Tho The one ono series la Is of ot the thc same axne age as the rhyolite dikes tho the dike of or rhyolite merely representing represent represent- j. j ing ng tho the Jute of or the tile nulL fault or a parallel I 1 f fault ault through the granite and So wide are these faults that the they aro really zones of DC In some I cases canes thO they are found to bo be from to feet feel wide Sex Se cn en largo large and anti distinct faults oro traced through the district while mall many moro more smaller faults tattlEs wore observed ob oh- served ervel paralleling these for a short distance These zones of or mind and the rhyolite dikes were mineralized subsequent H to tho the injection of oC tho Tho Thu oro ore matter consists of Iron copper lead and zinc tho the country lock in which tho the ore Is tlc deposited beIne benz be- be Ine- Ine Ie i for the or 01 ab ah- ab- ab l in quality of or certain ores Thus J In the Cactus mine copper and iron are aro the two more prevalent metals the oro ore being deposited In a granite g rhyolite und mind mass while whilo In tho the limestone lime lime- stone of or the Horn Sliver Silver and the tho Wash ash Washington ington lead and zinc ores are arc the tho more Important products of or the mine though copper is also produced In commercial Quantities The relation between th the dikes and the thc red zones of or 1 In marked and distinct Nearly all of or ortho tho the rhyolite dikes es were found to run Into pach other while two of the most l prominent red zones of or and andone andone one rhyolite dl di dike o e were found to center at the Horn Silver mine which In addition addition ad ad- to being thus favored as a center center conter cen con ter ter of faulting also has a no trach te limo lime contact passing through It Because Be lIe- cause caURe of ot this centering o of ot faults and dikes conditions were most favorable for lor the deposition of ot ore An And con- con since ln eJr so many fault lines and ud dikes centered at ut the Horn ibm Silver SIl It has been not at all aU unnatural for more than one ono miner to insist that he lie had I the Horn Silver vein Prominent I Properties Located I Following outward and westward rd on tho the two red zones of is the tho King David property located tetI en entirely entirely en- en on a sedimentary formation On one of ot these zones a little more to the west Is the Block property while on oil the other on the tho west side of or the mountains aro are the 01 old 1 Washington and Iron Devil mines now being developed eloped b by the Cupric Mining 1 li c Development company To the tho north on the rhyolite dike which is recognized as passing through h i ithe th the Horn Sliver Silver thought though not actually exposed on the surface Is the Frisco Contact property I Just Juat as the Horn Sliver Silver property properly has haa been the center of extra faulting and breaking caking in the sedimentary rocks rock thus making cavities ca where the ore might ht I Ibe be deposited so 60 the tho Cactus and adjoin adjoin- Ing properties In Copper Gulch have been the center of similar faulting in tho tIm Igneous rocks The properties that are on cm this favored zone one In Copper gulch KUlch arc the Cactus tho the Black Bird and tho Comet The Thc two big glory holes holos of tho the Cactus property whoso whose o diameters arc JOO and feet are for the tho most part In iii this hI an and mineralized material The rho Comet property prop prop- erl erty has bas but one claim partly on this material Un Undoubtedly tho o of thelio two centers centeno the tho ono one in the sedi- sedi rocks and the other In the igneous rocks occurred at the samoa same time In both however there has been bean a mi I second giving rise io to the tho high grade rade ore oro bodies which show up particularly strong in itt contrast con con- with tho the low-grado low In the Cac Cac- property rho rhe Imperial property owned b by the Utah Nevada Utah Mining 1 company compau Is on a of the same name origin as ns those of ot the Horn Silver and the rhyolite dikes of or the Cactus This fissure was waa not connected up I with the series dIrect s Uy but there Is ample evidence of ot Its being of ot the tIme same flame arias it is con- con lInd almost entirely to a limestone situated near the tho south con- con tact Produces Produce Ore Lotion LOlle Ill In In no Instance was it found that the contact was of particular value to the mining man but rather rathor that this thu subsequent faulting which thich often otten ran parallel to th the contact in tho the thries before betor cutting across to the thc II Igneous n ous mo masses to form rhyolite dikes was was the ore producing lodes loden I Ot Of Of the second series sarles of ot faults hul bul three w were re noted These veins represent represent sent sharp narrow almost i faults seldom If Ie ever aver being so 50 that It would b bo be impossible for one t tl reach rench from the to the thc hang Ing rig wall vahl Their filling Is essentially calcareous and the tho trace of rous 18 mineral mineraI found In them Is mostly galena ralena These later faults cut across the LIme red zones of ot and at such tuch Intersections thero there Is la usually a widening In the tIme southern part of the district one of or these faults cut across the tIme Washington ore oro bo body y causing some delay In the development of that part of ot the mine In In the north part of or the district but ono of ot these faults was noted It Is upon this fissure whose surface showIng show show- ing lug Is better than that of ot the other two that tho time In Indian Queen property Is located locate Nothing great I is expected I of this fissure in and of ot Itself but Its Intersections with half halt dozen wide zones zanca of ot bm are expected to tn bo he centers of or Important ore are bodies This theory has not ben tested In tho the district as yet et but the active manner in which Uncle Jesse Knight IB la push- push In lug ng work on the main tunnel which follows the fissure will soon Roon give ampIe ample ample am am- pIe evidence e of or its worth Lack of ork Work Ono One of or tho the retarding features of ot tho the district has been the almost entire absence of water pipes pires water nine miles for fOl hi Cactus mill mUI and amid tho the city of David Evans pipes water to tho the King David property about six miles nilen and nud Uncle Jesse Knight has n a L little spring which he brings three miles mlles through a three three- inch quarter to tho Indian Queen property l Milling has necessarily been difficult Tho The only mill in op operation Is tho the one on at Two Idle mills stand aland at the Horn Silver Tho The one Is If full fuU of that at ono one time did ditl good IO work but the other stands i idle kilo in its newness water-soaked water and ami I begrimed with dirt This mill mUI was waH L I planned to treat trent by settling the slim shines of the tho Horn Silver dump An outside I I company is responsible for tor its exist ence enco anti and Its present condition |