Show ds rye mif OB E RV AT av 0 THE lifts ar AND M oitis or dot aron it ETA UTAH it er 1117 HENRY alf hiir ENO E L ikas r I 1 m 1 I salt I AKE LAKE cm CITY I 1 from tile and nj mining journal new corll cosit veda the ore depoI 49 in those these lime stones are arc of various kinds I 1 most prominent wo we finder locadi conforming corcor more or less to the country rock in trend and anc dip they are not neplir strata but exceedingly e vedin y in their development at t some poll points they maintain main taio a moderate ate width for some distance theo theil again they bulge out to dc and at intervals they contract to almost nothing so BO I 1 that hat their continuation even appears doubtful they en ena close masses of the country rock us aa horses and spurs spun branch off from them hem and penetrate the adjoining strata in some places they are rich in I 1 lead a a an and d silver in others much poorer or even trae traceable cable only as a discoloration of the rock such is 13 tho the great ore belt including the emma aima oi ma I 1 Val lojo flagstaff heed and henson and other anines they are exactly such bach as would ho be formed most naturally by mineral waters percolating the strata which diss irod tho the earthy carbonates of the rocks and deposited mineral carbonates and sulp sulphates hata in their place by tile mont simple c chemical carl ctrl cal action eroding wide openings and depositing largo maecs of oie 01 0 where the rook was wal wa l most easily dissolved dienes solved and confining nes to narrow narow r channels where the rock offered more resistance forming no continuous stratum of ores but a series of connected deposits pockets and spurs next we find fissure veins which cut across the stratification ratification of the sediment tary ary rocks rock we ive have wen feen that numerous faults and fissures figures traverse t the lie rocks of the dist district net where mineral heart hearing ng waters hive live found ww to fissures fissure veins have been fur furnier nied but these fissure veini differ from the ideal structure which we are accustom cd ad to attribute to this kind of veins I 1 can best explain their appearance if I 1 say that they present very much the eanie features feature sas aa tho shove described berala leads with willi the only difference that they intersect the ho strata instead of following them their aqueous aiu origin i by y tile darcol in interchange terelia ago of the mineral in in the water with the limo lime and magnesia of the rock is 13 unmistakable the pre exist dialing int 6 figure sure cutting the strata offered I 1 tho a readiest thannel for tile tho percolating co waters which therefore followed it instead of eroding a away way along the aleut leut resisting aing strata but on the othe fissure they attacked the strata moro more or less noco accordion accord ioe to tho the re sisla sista uco the lauar offered cd and wo we find therefore these fidure feint filled with ore and the ito in soluble insoluble residue from tho the strata anil ana decidedly coid edly several such veins may be observed on tho the eolith side of the canyon on peruvian hill nothing is more natural thin that the mineral waters passing through such a vein vein on coming to a stratum which offered them special facilities for altac attack L should have followed that stratum and abd forn tormod iLd a spur to tile the voin vein analogous in its structure to the first arst described strata etrata scads and auch lions we may observe in reality A very interesting example of this combination of voin and strata lead can call bo be seen exposed lit a af the moyn foj it n 1 near ophir in east caay canyon 0 n 1105 possibly sibly some veins of the district may maybe be true beins part ot 01 the way and further on the fissure may bo barren and the principal body of ore may con continue t inu ke in suck such asperas a spur as a strata lead still others way may bo be what is called gash veins not long and jeep deep fissures ures cutting the dif different Terent rock formations the result of dislocations of the tit strata titiana iata but fissures confined to a hulsted I 1 thickness klims st of strata more the I 1 result 1 of shrinkage or some similar agency much gash voina in ill combination with strata r a e p ate apt to torm form a net b work of f ore ra deposits deposits finally wo we may find ore deposits of cf a limited extent apparently disconnect oil cd with any other the abc result of local F lidea which them from th the a mother lode several such have been exposed exciting on the part art of the dis cover coverers erS groat great hopes followed followed speedily by disappointment the first as well as the second limestone which carry carr the principal ore depositor deposit posit of ib the 0 dettrict to a very tery peculiar L birge bodies TOIL rock have the adf appearance caratine of a sandstone kind and closely resemble white lump sugar with a lar structure 1 hey are FO soli bult that th abey crumble 11 der tho ilia least pressure ure and an elare arc often eften taken tor for sandstone the lica liou of of acids provis proves that they concil coni il of a Kix turo of the car bonito of lime and perhaps aps magnesia with fine bilic a ou and within athia a distance of afi a few fell strata often abao c their appearance app lom loc their structure and aa ume the ibe a appearance ppe aranca oi of common siliceous eom oui bt stories ories or I 1 the ile bibel separates an aej unites to benoy combed and ma masses massas or predominating forms a quartzite uart while oilier struts contain little soule sonio bo be called ledges of milling ore in in an adjoining district in tho same mine conwit of such euch barren con cret creations ions or of silica in this limestone such uch rock is langly dovd oleu opel I 1 on Riven davanport port bill 1111 lunna lill hill lull hill tie etc and it would 11 ecru as if it hail had been favorable fayo rable to la thil ilpo of ilo aho aresi ores nor does docs this appear stran sc this rock is of its structure far lu muro ro readily perm c ablo to water then the ilia ol of demur texture lai turc airl au 1 would collur to mineral iDi nural waters a hundred iab wore more points ul antik than llian au lituch tona or dolomite ditc itc it il is 1 natural then that in the boue or of chevo rocks the ore delo oits are numerous that lal in thew principally the ext haugo took cook pi loo li t I 1 the be lead liron iron il 1 1 len I I 1 and aher iret p illic W ajla field ju iu solution by the gaurd and the he carllie cart by carbona ici the lattur were all di holved alic ito I 1 sulphates toul their thuir I Il alicc ace tho ilia ilax i in ill ibo iu ill alic I 1 lie of goo Lilii ui slid and was crivel aped ly by the a 0 alts alu t i czatle as ail it il bold bacu by ILO the lensar portion por liun of if the bit barata atti and iba Tort portions ions which arc olio denser lc ncr 01 wa tam lr s this is 6 the ibo obvious caule of ilia aljo chu rater ol of the ores throughout tile iu in thia strita finla f leads abid tal fi fiure ure atins aliu aho tanj land 1 too ciuch over tile nine and in the akl few wore del 1 10 ia ITolo and the ilio ores orca it at touch mich points are arc OUS it lively prior poor lu i cua to lo bur beinli i degree as to unproductive from such buch poi cointa eta is u derived th alio 1 irac of matter on tile ilie I 1 wast wito dumag raps 0 of F the he mines tile ore is is contained in the veins principally in ia the form af pf of earthy carbonates ani and sometimes in sulphates distinct crystallization is ii rare it is ii apparently mody mo lD Olly dy in ia the form in which it wan wall originally precipitated by ilia rapid action or of the liine upon the mineral batem if it had colic reduction and tion ion the silica would liae has a become more separated topa rated from froin the metallic parts of tho the ore hy by ilia be action of organic abille aille mot ter in llie lie rock a 0 hare bare been reduced and 0 1 I is I 1 y has thus been formed which is moate asli crystalline fa linc and rather free from fand cryb in mome home instances it has ha been an AA regards girda ri greater this reducing action will pra probably bably bo be found stronger and consequently moro more sul aphides will la bo met ditl willii such as galena gil coi pyrites bl blende eride etc clr adi |