The Copper Handbook, Volume 10Horace J. Stevens, 1911 - Mineral industries |
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Common terms and phrases
acres air-compressor apparently moribund Ariz ARIZONA auriferous and argentiferous Australia average azurite Bldg bornite Butte Calumet Cananea capitalization Carbon Carbon Co carrying cent chalcocite chalcopyrite Chile claims Colo COLORADO CONSOLIDATED MINING COPPER MINING copper tenor Creek cupriferous cuprite Dead deposits depth Described Vol developed directors district electric Equipment includes fissure veins former mine office former office Formerly Fully described Vol furnace gangue GOLD & COPPER gossan grade hoist Idaho Lake Superior Lands last accounts laws of Arizona Letter returned unclaimed limestone long tons mainly manager metal MÉXICO miles mineral MINING & MILLING MINING & SMELTING Mont Montana Mountain native copper oxidized plant porphyry preceding officers president Presumably idle production Property pyrite reverberatory furnaces rock Salt Lake schist secretary and treasurer shaft shares $1 showing silver values smelter Sonora sphalerite steam sulphide superintendent tunnel unclaimed from former Utah vice-president VIII width ΜΟΝΤΑΝΑ
Popular passages
Page 132 - English smelters to cover loss of weight in transport. DRESSING. Separating ore from gangue rock by hand or machinery. DRESSING FLOOR. A floor or dirt surface where ore is dressed by cobbing and other hand work. DRIFT. A horizontal opening in a mine, following the direction of the lode or vein; loose alluvial matter, such as sand, pebbles and boulders. DRIFT COPPER. Native copper found in alluvium far from its original rock matrice, whence carried by glaciers. DRIFTING. Opening drifts. Driving. DRILL....
Page 134 - ... and around a large sheave-wheel lying horizontally and traveling on trunnions, allowing the taking up or paying out of the cable. FLOAT COPPER. Drift copper. FLOOR. The floor of a drift or other horizontal mine opening; the underlying rock stratum. FLOUR COPPER. Very fine native copper that floats on water and is very difficult to save in milling. FLUCCAN. A seam of clay, found in ore bodies, or, more frequently, between the ore and walls of country rock. FLUKAN. Fluccan. FLUME. A launder or...
Page 143 - ROCK CRUSHER. A machine for reducing rock or ore to smaller sizes. Crushers are of two types, the jaw-crusher and the centrifugal. The...
Page 51 - A copper sulphoarsenite containing 57.5% copper when pure, but shading into a great number of varietal forms. Common name, gray copper ore, in common with tetrahedrite, to which tennantite is closely related and joined by a chain of rather obscure minerals shading gradually from tennantite into tetrahedrite. "The many varietal forms of this mineral are brought about by partial replacement of copper by silver, lead, zinc, iron, mercury, cobalt> nickel, tin and platinum, with a marked tendency toward...
Page 426 - Final county, together with the Producer and Century-Chief group of 320 acres, and Index group of 220 acres, in Pima county, all in the Quijotoa mountains. Company sold stock, 1910, on the strength of a clever brochure, written by Alfred Henry Lewis, the talented writer, whose statements arc not hampered by a knowledge of copper mining.
Page 41 - ... copper, being the richest copper ore. Chemical names, cuprous oxide, copper protoxide. Common names, ruby copper, red glassy copper ore, octrahedral copper ore. Crystallization, isometric, commonly in octohedrons; also occurs massive, granular and sometimes earthy. Fracture, conchoidal. Is brittle. Hardness, 3.5 to 4. Gravity, 5.85 to 6.15. Lustre, adamantine to earthy. Color, light to dark red; when fresh, usually ruby-red, but fades to duller red. Streak, brownish red, shining. Is subtransparent...
Page 130 - COSTEANING. Proving an ore body by trenching across its outcrop at approximately right angles. COUNTERBALANCE. Hoisting plants usually are worked in counterbalance for deep shafts. The weight of the descending cage or skip is used to partially offset the weight of the ascending cage or skip. COUNTER VEIN. A cross vein, running at approximately right angles to the main ore body. COUNTRY ROCK. The predominant rock form of a given district.
Page 135 - Any mineral used in the furnace to aid in fusing the gangu« rock and worthless elements, which combine with the flux to form slag. FLUXING ORE. An ore containing appreciable metallic values, but smelted mainly because containing fluxing agents required in the reduction of richer ores. FOLIATED. Having a laminated structure. FOOT. The foot-wall. FOOT-WALL. The stratum of rock underlying an inclined mineral lode or vein.
Page 139 - MINERAL RIGHT. The ownership of the right to mine under the surface of land owned by another holder. Mineral rights sometimes are reserved in selling the surface of land in some districts. MINERS INCH. The amount of water that will flow through an opening one inch square under a six-inch head, which is...
Page 133 - Electrolytic. Applied to copper means copper made from impure metal by electrical decomposition and redeposition; the bar of impure copper is gradually dissolved and the pure metal redeposited at the opposite pole of the battery, while other metals fall as black slime to the...