The Weekly orb., 1899-03-12
THE COPPER QUEEN.
Professor Douglass Describes it fe.
 fore an Institute.

: in attendance upon d meeting of thu Ameriran.Institute of Mining Engineers : During ,he stsslon he Iead paper ot the Copper Queen mine at Bisbee, whiel he accom- panied bv lantern views. The Engineering and Mining Journal says of Poi. Dou.lass' lrclure:
 The room, unfortunately, proved rath CT ioe small to accommodate with ease all those who wishe 10 hear Dr i Jane D.uylass' veiy interesting de .crlp,inn of he Copper Queen mine at Bl.b-e, Ar,znna Dr.. D,ukIaSs stated that the Copper Queen mine was dls covered before 1880 but little oL n' | work had b. en done upon It. 4 large nutciop of feriuginuuS C. pper ore "I i the slde of d mountain dipped at s steep angle into it. This ou;cr"p seeme, 20 remarkable that It seemcd IIri,bahle the,e were others in the country lime stone. The nutcrop, as shown by all ' open cut when mining began, was abe II 6O by 50 feet. ani was the only out crop of that large series of ore h"d"' that have yielded ,o much copper An entered the ore bndy between the srcuud and third le els of thrni' l. ,i.u.lop-d what was iOLud to he alt l. plated O e body which welded hr,w' tn 1880 ald 1881 about 200 .O00, ,UJ0 ib-. 'I copper. The com .Any. aL,er d'liIn4 psst over 400 feet anI fl tnx no hln!, WAS ahuu. to al,aE,Ion the mine, as the Neptune mining 60 nl'any hat a-' 1 fuund no ore ai,ti much work. Bni l' l the .umme, ui 1885 anO he, u,r tod , | was urcuv.rei n.,wern 100 aud 5OO { l bv the C,pp. Qi.eI irt .'h { '1 II pan eI. simrlaue. .u-lv. Since then developments have ax' n It hver |" hs. l properties ku,ch ,sel al SE~'!ff sale, but as y't no v'!ItrI'. 'rr h,' h'ru found except nn the niir 'lnrs'ou"s, | These lmestOnrS asc '"mlaratr'lN
 
 on the paSt bv tel i4pathru' r,n:ks, gLan ite and ryolIte. In the ilmrsH'ne now ever, along it's cpntaci with iii. f''id "A I ll.etic ,0rks, are all the cDJ,r'r u'ca ye' dlscove ed m workable quantities.
 Tueee felds, a,henc rm k carry Il, copper of any consequence. The urIe' limeslunes alone have heen "r ke' prnperiy, as they cary the large nas-r' of ux ld ,zud and unux ,dlzrd ores. Tn. lower linipstunes are lnpegnaled Wltl ron pvrlieS, with hpar+e amount 0 copper pyrlte-. and tuese deposts at be.nx developed now.
 Tine line between the lime tones and feldspathic is hot shai p as the llnie' stone near the cOntac,, as a rule Is greatly decomposed, forming q tort o transition zone. The ors depo.ita seein to be arranged without any orter m the l limestone. Those first discovered were completely oxidlzed. The present ore+ are mixed more ur less with sulphur 1 but there is no ctear line demN ka- ton between the oIid'zed and uHoxnt. lned ore. On tho 200 foot level of the Czar shait, there is an apex of an i'm. ,nense body of partially altered aud un. altered sulpnids ore, containing proD- ably 10000 tons. But at the same time anout 50J feet below that level occur ores that are almost entirely altered. The altered ores are, ot coirse most interesting to s,ulv. The ore bodies are generally foInd m ledge matter. This is a ferrnginous cla! winch is often dis s'incllv siIat,ted. ln places it carries copper, but about S9 per cent of It does not ctrry moe than a trace. The copper !s sometimes dis s-nrinated n fin. pa:Ilcirs of carbonate oi snb-"xie m tue clays, but more gei.- erany 1t occurs as rulrtc. ln r"lnlact masses oi limunlt", sometimes ot very large size, imli>Gui III the clay. He ve'y rich specimens nf the caIn'n tas pt copper, for when the mine IF famous. occur generally m the clay, close 10 the limestone. At times the one occurs as metailc copper, generally m yellow, sandy clay. These nasses ol native curper occur at the h":tom of .!.e g,en' pockets ot ledge matter and seId0n at the top. The snlphlie ore m 'sses may occur at different levels in the ledge matter.
 The copper originally was present as sulphide ln large budlrs ot noH pylirs. The content of copper in thesr 4ayrtes F. often a- tow a. 2 pc ceit. By the OX Id zinS of the snlphldes and action of the water reicnlatlng through thc lme- stones, complex series If rllrm;cai changes has resulted ln tine pr ascn. con d,,iOns. Drifts snur;!mos st,uw SS per ctn'. ca,hUnate of lime in thc limestone roof, while the clay floor has Nut Fl t;acc.