Arizona republican., 1909-02-25

AL CTdWIOruS SOiu mines HorlH Oi Metcalf
 Native with galenite in the Hon.
 GROSSULARITE.
 A calcium aluminium garnet of light color, with much iron oxide. A common associate of copper ores of Arizona and other regions. (See Gar net) In Arizona it may be noted especially in the Dragoon mountains and in the Santa Rita range south of Tucson. It is conspicuous as the gangue mineral at the Twin Buttes in the Santa Cruz valley; at Mineral Hill at the Azurite, at the Plumed Knight and at the claims in Olive district and the Sierritas, where much of the copper ore is found in close association with gar net of light color It occurs similarly in the claims of the Imperial Copper Co. It is particularly evident as dike-like borders of some of the cop per ore croppins of the Christmas and neighboring camps.
 These and other examples, which might be added, are sufficient to show that in Arizona, as elsewhere, 1t is the rule with scracely an exception that wherever either a plutonic in trusion traverses limestone or follows plane of contact of limestone and another rock, and has the conditions required for metamorphic action, gar net and some times other silicates are formed and are found with copper ore The reef formation of garnet analogous to quartz lodes in form may be seen to an unusual extent at the Twin Buttes property, where there Is a series of garnet reefs in parallel lines along and near the contact of the granite and limestone. These garnet reefs are copper bearing and have the semblance of regular lodes. Both at the Twin Buttes mines and at the Imperial mines, west of Tucson, copper ore in the form of chalcopyrite is disseminated in the midst of the garnet in the form of grains, stringers or nodular masses. Such masses are found in places completely enveloped in the garnet and are apparently of contemporane- ous origin. Large blocks of garnet quarried at Twin Buttes often dis close, on being broken up. nodules of copper sulphide so completely en- closed in a dense garnet magma as to be fully protected from atmos- pheric agencies, and to remain un- and unoxidized in croppings exposed to the weather.
 It has been noted by Ransome in the Copper Queen mine associated with tremolite and diopside; so, also, In the Calumet and Arizona.
 (Sse also garnet)
 HALITE-ROCH SALT.
 Sodium chloride, chlorine, 60. sodi um 39.4.
 In large, clear crystalline masses. associated with the sulphate of soda. in hills in the Verde River valley a few miles south of Camp Verde.
 In the Upper Salt river. rising in springs-the source of the salinity of the Salt river. Re ported, also. in beds on Salt river near the mouth of Canyon creek on .he Indian reservation, Gila county.
 HEMATITE.
 Mrror-iron, Specular Iron, Misace- ous iron. Sesquie oxide of iron. Iron. Sesqui oxide of iron 30, iron 70.
 At many localities, chiefly as crop pings or hard gossan of pyritous de- Dosits of iron and copper, correspond ng in position, and relation to sub acent ore bodies, to the limonitic gossans of less arid re- sions.
 As crest stores, or gossans, of cop per ore at Pal.ner & Wharton's cop per claims in the new copper coun- | ry," in the northern part of Yuma | county.
 So also at several lodes or copper | deposits in Santa Cruz county, notably | It the Pluto claims, the Isbella and | 1t several other claims where copper | s found in the red shale formation | lear Montosa, Santa Rita mountains. l
 Some loose rolled masses from ar oyos6 have been brought in from the | Tucson mountains near Tucson.
 In the eartiy pulverulent form at | Carter in the new copper county, | Yuma county.
 As "hematite paint" at Darker. A. T., and according to R. McMahon 9O4) in the region known as Bouse's We'll, not in very large bodies, but in freaks from three to six inches wide,
  ians use. The specimens sent in toj he Arizona School of Mines were1 uperior in quality to any before cen, being extremely fine and smooth, preading with great ease as paint | when mixed with oil The locality II gas said to be twenty miles from 'arker, thirty miles northerly from I luartzsite. Since that time the con- truction of the Arizona and Califor- ia railroad has brought the locality nto further notice and rendered this important pigment commercially ac- essible.
 Specular iron also occurs in crys- alline rosetts near Mammoth, Pinal ounty (PooD.
 The micaceous form is reported rom Wilcox and from Briggs in 'avapai county. Oong).
 In the Clifton Morenci district, ac- ording to Lindgren, it is a some That sparing product of contact meta lorphism associated with quartz, arnet, epidote and magnetic.
 Found also near Quartzsite, Yuma ounty. Occurs in the magnetic in he massive croppings of the Black Diamond copper mine, Dragons.
 HUBNERITE. |, Tungstate of manganese with a tile ferrous iron. Analysis of the )ragoon mineral by Prof. F. W. Iuild of the Arizona School of Mines I 1904 gave:
 errous iron .......... Fe 2.66