| Show Hi 1 U L. UTAH UFAH SUNDAY AUGUST 8 1909 5 THE NEVADA DOUGLAS ro I MINE Large Copper Property at a Yerington That Is Tak ing Front Rank With ool Big Producers r if Jf 7 The Nevada Dou Douglas las Copper company 5 operating In Yerington district Nevada t has one ono of or C the tho remarkable high high- i. i grade s-rado copper propositions of tho the country coun- coun try With 1 a very small portion of Its Ita v rich estate developed t to tho the foot toot t. t i lore level It has In sight by most 4 conserva- conserva the tive e estimate tons of ot ore oro averaging avor- avor i aging 04 64 per cent which copper should t I. I bo ho smelted and the tho product marketed k ji at a net profit of ot about with copper bringing 13 cents a n pound p t fc Tho The company compan In the tho course courso of ot development de- de has taken out an and marketed p L man many thousands of dollars dollars' worth of i hl high grade Ir h f ore that ore that which carries 15 per or cent copper and anti better better better-anel and now F to It to begin active production a railroad Is being built by the company corn com pan pany papy connecting the mino with tho the I Southern Pacific at lt Vabu Wabuska and anuj this is 18 the forerunner of or a smelter of ot larS largo capacity The Tho company owns an admirable ad ad- mirable smelter site with water rights and other advantages which foretell low cost prod production But the tho figures given ghen above convey coney no adequate Idea It f the tho extent extant of ot the tho Nevada Douglas Copper company's re re- re sources The portion of ot tho property which has been developed to any extent Is the tho Ludwig section section section-a a part of t ne group of 81 six 0 claims In addition to I this group are aro the Douglas group of ot eighteen claims the Casting Copper group of at four claims and tho the Gypsum group of ot four claims cl Surface Deposit f The Douglas group Is not only the tho r largest In area aiea but In It Is by far tar the greatest potential wealth Judged by surface indications and development so far accomplished In that section is shown b by numerous open cuts accordIng according accord accord- ing to the report of ot En Engineer Llew Humphreys ono one vast deposit of ot ore more than 2000 feet long by SOO feet wide Tho The engineer trained In the school of conservatism has not tho the nerve to I estimate the tonnages or of that vast deposit de tic- posit t of ot ore ome I find it beyond army any possibility of or measurement he ho says to do Justice to the oro ore deposition or to myself as asan astin tin nn estimate of or tonnages under present circumstances would be mere guesswork guess guess- work But assuming that the ores go godown godown godown down fifty feet the yield would bo be several millions of tons of ot ore containing contaIning con con- taming 3 per cent copper I Tho The Dou Douglas las group has been worked principally by tunnel driven foot feet In southerly direction going through tho mineral mineraI zono zone at a depth of ot about ninety feet teet under tho the apex of ot the tho Dou Douglas las Hill From this I tunnel a series of or Irregular drifts crosscuts etc otc have havo been driven to Intersect tho the richer fissures us- us while below belo this level lovel have havo been beon sunk to depth of ot feeL teet and present bottom workings show shot a strong of ot copper car cat Particularly noted through these different t workings I Is tho the fact tact that a series of Irre Irregular lenses of ot ore oro arc are found distributed which have ha been called tho time spot ore oro of the district this being being- a 8 copper sulphide with chal- chal the tho particles s of which aro are found finely disseminated and peppered through the gangue material The Irregularity of ot work on the tho Douglas is the result of past operations by former owners done dono principally from a desire to extract the tho richer portions of ot tho vein which policy at the tho time mined was made necessary b by the heavy charges entailed In transporting product to remote smelting points the lower grade ores being loft standing In the slopes and open cuts Low Cost Cod of I Over this section as near as could be ascertained with any of ot certainty ore oro reserves of tons averaging a o fJ per cent cont copper can bo be extracted at a minimum cost of ot about 1 1 per ton tone while the tho quantity of lower grade glade material as indicated by all tho the assays taken Is not estimated The quantity i Is extremely large Jarge but to got goat even en an nn approximate estimate of tonnages tonnages ton ton- nages would number o of being put down at different points Wo 0 are certain however of ot a mountain of or copper ore that will vill average about three per cent copper coppe The favorable conditions under uner which these low lo grade ores can be bo mined and smelted direct In lit conjunction conjunction tion with the copper ores found over ovel other portions o of the compan company's prop OP will wll eventually make mako the Douglas Douglas Doug Doug- las Hill mineral deposit especially productive productive pro pro- so 80 that It ma may be worked to leave leao a good margin of ot profit which will equal Is not exceed results now being obtained from other large largo low r- r grade rado deposits of ot the West est this In proportion to the copper contents found in iii the ores The proportion of higher grade material ma- ma tonal such as spot oro ore being com coin posed of ot the LImo richer carbonates sulphides sul sul- etc ote that we can obtain from the lie Douglas section at present time Is reasonably estimated at ton tons This placed at an average better bettel than five o per cent copper is con considered conservative c an and In keeping with good Judgment t. t the And nd yet tho the Dou Douglas lUll Hill section of ot development property Is only a n. prospect Its has awaited the to depth of ot tho timo opening bodies bodio of hJ higher her grade grado ore found In the Ludwig section That I accomplished to the tho extent of ot making an Immense tonna tonnage e available for tor the smelter development de of ot the time Douglas Hill deposit 1 Is to be bo undertaken b by driving a drift over O front from tho lowest level of ot tho the LUdwIg That drift will I attain a depth of about 1200 lOO feet Ceet un under un- un der tier Douglas Hill and anti that It will make mako Important If not sensational disclosures ores ures ures I Is tho belief bellet of every mining man who vim has studied tho tIme formation I Much UlIch lEigh Grade In imi Ludwig Lud Ludl l r. r The Tho Ludwig section has been developed devel b by a 0 shaft feet deep thence b by Incline to tho toot foot level lovel with i drifts crosscuts and at nt tho the various levels Recently to mako make n a working shaft tho the Incline has been raised to the tho surface An In Interesting In- In feature of ot this work Is that the time Incline from tho the to tho the level lo is In hl high h grade Kralle ore while the time same body of ot hl high h grade rado hits inja been cut on the love level Prom the level upward the tho incline Is In the of ot the tho vein eln which tp I I a rt 5 I d 4 0 i t vt 2 w jf t 4 zt tr 4 V. V p z r i I r I DOUGLAS HILL JEWEL BOX WORKINGS I bowing howing Rich Rh Ore Extracted Balance Around Opening Lower Crade Grade Ores from Surface I I I accounts for tor time the failure to expose tho the thoI high grado grade shoot further i I The various vallous workings In this section show tho the ore bodies to be continuous I In lii point of ot values from tom tho the surface tunnel to tho the bottom of oC tho Incline From the time upper levels o es a J. J large largo quantity quantity quantity quan quan- of rich oxides and carbonates have been extracted In tho pas past leav- leav ng og largo large deposits of or vein material having good copper values scattered Irregularly through the upper levels thoo being for tho the most part oxidized ores or bunches of or gossan with ith richer seams Beams of ot cuprite oxides s and antI carbonates carbon carbon- ates ate extensively oly distributed these latter lat lat- lat lat- ter br making as Irregular tissues through the tho oxidized ore ores and also aho through time the calcite gangue with which tho the Ludwig ore bo bodies les aro are closely Identified Tho The zone zono ono of oxidization extends to a I depth approximately feet teet the line lino of or demarcation between th the tho oxide and zono zone being very vary clear an and is at about fifteen Itcan feet teet below foot root level leve I nil lUg luJ hl on un o Lei Level el On tho the foot tool level tho the most cx- cx development of or tho the sulphide ores oroa has been accomplished work baylog havIng having hav bay ing log boon been prosecuted In tho the nature of oC I I crosscuts anti and raises etc to I block out tho timo ore bodies through I which this level ol ha has halt pa passed sed whilo driving tho the two main headings in a southerly and southeasterly direction has been carried on con consistently both of ot which arc are extreme extremely favorable points at which to prosecute work these points responding to development develop develop- ment and gr greatly au augmenting m oro ore re- re I dally daily Tho The two headings s are arc going in direction of ot Doug Doug- las JaB section of country through Hope claim all Indications pointing to ex Ox- Ox gratifying results from this work vork This Is especially no so o in tho face faco of oC tho the main foot toot lovel level south for tor drift has now gone gont through h now new ore oro body over HO feet long present breast all oro ore that gives I indications of ot being of ot great width and of or a 0 nature that will bo easily worked ked tho the ores found in sheared zones zona of ot porphyry and lime and being moro more In tho the nature of ot deposits such as havo have been encountered in tho the lar larger or low grade grado producers of the th West Yest with the tho exception that tho the copper values found in Ludwig are much richer and development work should be bo continued here hero with all aU dili dUl- gence What Is termed as the oro ore bOd body on the foot root love eJ location shown hown on plans gives Ives a good body of high grade copper oro ore that also re responds responds re- re to development work In the tho most gratifying manner m anti and will bo be found to exceed all limits placed upon It In present estimates of ot ore oro reserves This ore bod body gives every very indication of ot being continuous from tho the oxides and carbonates on the time foot toot loyal level to present deepest workings without any country rock Intervening the class o of oro ore found In bottom of ot the tho incline shaft corresponding corresponding- to the high copper values found over The general rake rako or dip of ot the dif dlf- ferent oro ore bodies on the foot level Jovel Is about forty degrees to the tho south and anti crosscuts and drifts hero indicate a width of ot mineral from to feet teet I Ore lImIT llody Time The largest probable ore oro body In the mine up to present timo will without doubt be found in this block of ot ground anti and development now consists consists con con- In pushing the tho east main drift In a straight ht line to get under and connect with No r-o. winzo on the foot level lovel this being down fifty feet teet In high grado grade ore and when this Is accomplished crosscuts will bo be driven easterly and westerly to ascertain true width which from all Indications we wo can place conservatively ely at over feet All the ores In tho the sulphide zone zono uncovered un un- un- un covered on and anti foot toot levels are aro found to carry excess Iron with copper values of or exceedingly good grade which Is possible to mine smelt and treat at minimum cost Owing to favorable analysis obtained front from these 1 ores all the tho energies of the tho management manage manage- ment mont are being exerted to their fur fur- urther ur- ur ther thor development this to the tho exclusion of or all other work vork on tho the company's compans holdings s the Important fact not being overlooked o that tho the Ludwig ores oros aro are favorable tn fluxing fluxing- material analysis of the tho product taken taleen from time lime to time Indicating that metallurgical the composition of ot theo ores will vill play an Important part In cheap production of or copper from rom the tho Nevada Douglas company's compans worl workings That Nevada Novada Douglas company's gypsum d. d deposit Is la a resource urco of no ro small al Importance Is Is shown reso by the tho Ot en- en K report the tho estimate of ot the tho tonnage to tho the depth of oC feet teet Is given glen at tons Tho product Is of ot superior quality the market for tho finished product Is al almost almost al- al most unlimited and antI It Is said that with a 0 modern plant to cost gypsum plaster which brings from to 14 1 a n ton according to qualIty qualIty quality ity can cnn be produced at a 0 total cost Including transportation to the Coast Const of 7 a. a ton With Its ita own railroad l at ot hand the tho comp n company company's gypsUm deposit becomes a n. vory very attractive o proposition I Highly interesting and instructive are arc the tho remarks of ot Engineer HumPhreys Hum Hum- upon the geology of Yerington district and the tho character of ot vada tho the Nevada Novada Ne No- Douglas ore oro bodies I Formation of District The Tho mountains mountain of the tho Mason Iason range havo have a trend generally In north anti ami south direction lying twenty miles east cast of tho the main maln range of ot th the Sierra vadas No- No Tho The country rock formation contiguous to tho the Ore oro deposits of tho Nova Nevada a Douglas Copper company's properties consists consist of or granite granito porphyry limestone anti and limo lime shale with tho the limes comprising tho the principal rock on both hoth sides country I a des of or the mountains range of 01 these on tho the east cast and west sides shIes of ot tho the ran range o being separated b by extensive Intrusions which form torm tho the backbone of ot divide to this series of hills hills- Tho The LUdwig section ore bodies oc occur occur oc- oc cur principally In the and are of ot varied nature which by metamorphic meta meta- action have havo become highly approaching while tho the large section covered by bV principal portions portions por por- of ot the Douglas group consists of c ores mixed also with con con- blo The Tho less altered limo lime in the tho vicinity of ot the Dou Douglas la group roup is not as productive productive pro pro- of ot ore oro bodies bodlos as the tho garnet Tho The formation in a westerly west West- erly erh direction Is covered by the tho unaltered unal unal- limo lime anti and still sun further to tho the west vest on tho claims of this part of the tho company's com corn pany's territory with good copper values aro arc still found In a a. garnet garner formation making Impossible accurate determination of ot width of ot the Dou Douglas las Hill mineralized zone zono Over each and every evory ono one of ot the claims comprising the tho Douglas group are found Irregular fissures small deposits de do- posits outcrops etc these all showIng showIng show- show Ing ng good copper values The principal ore oro zone of ot Douglas section Is limited to tho the surface In Indications on the tho claims of ot the Sunlight hl Lookout Douglas and Francis Francl which form torm ono one vast hill of mineral mineraI over 2500 2600 feet teet long b by from from to 1000 feet cot wide of copper bear ing nature ore oro occurrence being best bost classed as a huge hugo deposit for through this deposit large veins lenses and scams seams of ores of copper are aro found In series cutting this general formation Tho The common trend of these numerous veins Is In |
