Arizona republican., 1909-02-25

LIMONIIG e. Hydrous sesqui-ox of iron.

Hydrous sesqui- oxide of iron. A common associate of copper ores, and as "gossan." In the Copper Queen at Bisbee It is sometimes found in stalactitic and botryoidal forms, but is generally earthly and amorphous.
 In cases where copper and iron so- lutions have attacked limestone so as to form cavities, copper carbonate is deposited in crusts on the limestone while an earthly, porous mass of limonite occupies the central portions.
 In the form known as "gossan" in the croppings of ore-bodies, and wherever iron pyrites has decomposed with the loss of sulphur by oxidation.
 Isolated punches and fragments oc- cur in the soil of Canyon Diablo, and are believed to be residual masses pyrites.
 LINARITE.
 SuIphate of lead and copper: Sul- phur tri-oxide 200, lead oxide 55.7, cupric oxide 19.S. water 4.6. It Is known, also, as cupreoHs anglesite.
 Found in the ores of the Mammoth mine at Shultz, Pinal county, with cerussite, galena and wulfenite in specimens with a beautiful, clear in digo blue color.
 MAGNETITE. Magnetic iron ore. Iron 72.4, oxy- gen 27.6.
 As crest-stone and as gangue or yeinstone of copper ore at the Black Diamond mine in the Dragoon range, Cochise county.
 In the croppings of copper ores at Rosemont and the Narragansett claim. At the Isabella copper and lead claim near Montoso, Santa Rita noun tains large masses were intimately mixed with malachite.
 In loose, rounded masses, Tucson mountains.
 In dodecahedral crystals five miles south of Queen creek. Pioneer mining district, Pinal county. (Hunstock).
 In the Clifton Morenci district in the contact metamorphic limestones and dolomites, associated with garnet, amphibOle, pyroXene and sulphides. It occurs in quantity available for smelt- | ing Aux in the Manganese Blue and the Arizona Central mines and in the gap where the road to Eagle creek descends into the Gold Gulch valley. MALACHITE. Green carbonate of copper|Copper oxide, carbon dioxide.
 One of the most common of the copper compounds formed by the de- composition of copper sulphides at or near the surface in experiencing deposits. Dark green or malous green In color 1t gives beauty to the ores and indicates their nature. While 1t occurs at nearly all the copper mines in the croppings or upper levels it has been one of the chief ores at the Copper Queen. Bisbee, where 1t was closely associated with azurite, the blue carbonate, and with oxide of manganese and cuprite.
 Fine specimens were found in the upper workings of the Longfellow and other claims, Clifton, Graham county, associated with azurite and native copper in kaolinized porphyry.
 It occurs similarly in the upper workings of the Imperial. Silver Belt district
 Of the maIachite occurring in the Copper Queen mine Dr. James Doug las says: "The malachite is never found in such large and important masses as to make it commercially valuable for decorative purposes; be- sides. occurring generally in thin botryoidal masses it is usually streak ed with manganese which detracts from its purity. Its most striking mode of occurrence Is in geodes which are lined with velvety crystals of the same mineral. These hollow spheres, the walls of which are com posed of concentric layers, are rare, but when found are usually in nests imbedded in soft, wet ferruginous or manganiferous clays. such as consti- ute the gangue or ledge matter Of nearly all the ore, and they occur at no great distance from Q lime stone wall or partition"