Bisbee daily review., 1911-02-23

many in this district appears in the last numter of the Mining World oi Chicago The report is contributed by Dr. Walter Harvey Weed, who, in continuation with Frank Probert. reeentN exported the Ray Central property
 Under the caption. The Ray Cop Ter Nniug District. Arizona Dr weed says The Ray or Mineral Creek district Is an ,ntermountain basin enclosed Ly peaks 4.e00 to 5000 feet Mrh The elevation of Ray is e.oS5 feet The mountains 10 the west consist of uualtered gray schist and of vhie granite which toward the northwest are cauped by flat beds Of dac5ie turf. crowned by thick masses of columnar dactic lavas- East of tie Mineral Creek basin a long mountain crest shows inclined beds of limestone lying conformably anon heavy bedded quartzite. very strong, well defined fault runs down Mineral Creek from the north end
 the lasin. through the town of Ray until l3St beneath the Gila conglomerate This great fault and rs parallel sympathetic fractures has thrown down the country east ot the creek. so that the dactic tnff beds. once continuous across the val les to Teapot mountains, are 5t the creek level on the east side O. the fault. forming great tilted blocks between the creek and the mount ains, while west Of the fault the tuHs ard quartzite that once over aid the schist are entirely removed. The sChists are the oldest rocks. prohsbiy nre-vambrian The quartz ties and iimestgnes are Cambrian 70 c/bonHeroes- GiGbase of Meso- zo.c age breaks through these sedi- Igentar.os This rock has altered me others but slightly. if at ail The granite is the youngest sntru- sive rpcE. breaking across tho d'a- base It is beievaa to be tbe di- rect soarce os the primary miue-ali- @at,On found in ay the o her rocks Dacite, the youngest igneous rock. is of talcanic not deep seated igue- ous origin it contains only oxi- cized ores, which. go Tar as known are connected with masses cf min- eralized diabaae and granite
 The district contains two dizaact sharply defined minsralized divis- ions. separated by the gorge of Min eral Creek The western area IS the Ray copper beh or gene. in which The great deposits of disseminated copper ore occur
 The disseminated belt consists of m irregular group Of roughsurfaced. red stained hills. running from Ray mountain 10 the New Years group. The area is limited at the south by fault zone, or line of distributed displacement. so that there IS an abrupt change from nearly fresh gray schist and lightly cOlcred granite % ihe red highly altered slicifled schist north Of the fault. This line rms up Amanda grIch. crosses tC Copper canyon. and follows up Cop iser caHyou for a mile or SO On the west the minerslized area stops ab rupt;y near the New Years claim though tongges Of altered rock ex tend into the schist and granit, for some distance farther The bel is so well defined on the north b, the sharkey canyon though it boundary is hidden by wash from tn, mountains
 In general the belt consists O thoroughly altered schist, compose, essentially of quartz and resieite but occasionally showing darker cd ored nncieal remnants Of the orig nal schist
 The relative age of the rock i shown by the granite which borders and probably underlies the entfr belt and is only exposed above an in the Ray mine. and over part e 4he Isabella claim. The Ray diabas dike cuts through the schist but i itself cut off by the granite porphy ry. Another diabase dike Funnin \. 15 F. crosses the hills, one qua ter or mile north of the Glob group of the Ray Central Co rul ming along a displacement al nearI right angles to the Mineral Cree fault
 The schist as a rule retains il foiiatiou lines. but Is cut into rhomt by a net work Of tiny quartz film and veinlets. and by joints staine by films os iron and copper sil cate As e rule the rock breal into angular fragments which ( not correspond to the foiiation.
 Iu the rough. clinky outcrop forming the knobs west of the Rs Central holdings. the rock is crushe and the faults bordered by bleache schist netted by hematite veinlet correspcnc51g to conditions ses at Miami To the west, howeve near the Sharkey mine. the rocl are softer and routed to a more ( less clayey red. to creamy white m terial
 The Ray ore deposit consists highly altered, reddened. siIicihl schist, sheared and locally crush'