Arizona republican., 1913-09-07
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lower portions of the oNidized ores. In the Calumet X. Arizona mine, how eyer. it is abundant on the 1050-foot level It occurs in part as incrusta- tions of chalcocite
 Brocha ntte.
 A basic Sulphate of copper has been identified at only few places. It is of common occurrence in the ores of the Clifton, Morenci district. Arizona where according to Lfndgren, it is in tergroWn with malachite, which effec- tively masks it's presence in hand spec imens In the shannon mine, near the surface. in porphyry. it constitutes q rich ore body Ransome noted it also in sections from the oxidized zone at Bisbee Ariz. In all occurrences it is probably q deposit from oNidizing waters.
 Malachite.
 A basic cupric carbonate. is abundant in the oxidized zones of many cuprifer- ous deposits and is most abundant i'll deposits that are inclosed in limestone. It was present in considerable quan- tity in the superficial portions of cop
 
 it occurs as globular masses and also as bands equivalent to parts of certain rock strata It also forms envelopes about sulphideS and oxides Tn the old Dominion mine at Globe, Ariz., accord ing to Ransome, malachite is con spicuously developed as veinlets in quartzite and has locally replaced the quartzite Malachite is present almost mn in 10 ,f sulphide deposits and in some of them it persists in the outcrop. Its associa- tion with limonite in the gossan has encouraged deep development in many copper districts. It is unknown as q primary ore in deposits formed by ther- maj waters.
 Although not mentioned in the above Bisbee has produced beautiful speci- mems and large quantities of the min eral-Ed
 Azurite.
 Like malachite, is a basic cupric car bonate. So far as known, it is not formed by ascending thermal waters. It is very much less abundant than maIa- chite but in some deposits in lime stone, as at Bishee it is plentiful
 At Morenci it is frequently associated with kaolin and is generally one of the last minerals to form.
 ChrysocoIIa.
 The bluish- green hydrous copper siIi- cate forms rather abundantIv in the outcrops and near the surface of some copper deposits. In others it is rare or absent It is a common mineral also in the oXidized zone of some silver and gold mines. Although widely distrib- uted in some lodes, it occurs at most places only in small bodies. Ii is ire quenty associated with malachite and azurite and is not known as a deposit f ascending hot waters At Globe chrysocolla replaces dacitic turf In this district it is older than malachite where the two minerals are together md it forms at greater depth than nalachite. It is an ore mineral in sev- efal other deposits of the southwest where it is mined with copper oxides and carhOnates At Bisbee it seems eyer to have heen aburdant but in the Calumet & Arizona mine it forms thin shells about kernels of Cuprite native copper, and brochantite and is in turn enVeloped by malachite and calcite
 "Chrysocolla is found cementing sur face gravel near Globe and is also found in the Ray mine-Ed"
 Oioptase.
 Like chrysocolla, is a secondary cop per silicate. It is characteristicalIy 'ormed in the zone of oxidization anl is unknown as a deposit from hot as cending waters. It is known in only a few places in the United States, among them Morenci, where it is associated with chrysOcOlla in limestone For lack of space the remainder will have to go over until next week