A Preliminary Report on the Bauxite Deposits of Georgia |
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A Preliminary Report on the Bauxite Deposits of Georgia Thomas Leonard Watson No preview available - 2019 |
A Preliminary Report on the Bauxite Deposits of Georgia Thomas Leonard Watson No preview available - 2019 |
Common terms and phrases
16th district 3rd district 3rd section 4th section Alabama alloy alum alumina aluminum alunogen Arkansas augite bank Bartow county basalt bauxite deposits bauxitic clay beds Bobo district boulders Cave Spring cent chert color compact containing Coosa Valley cryolite deposit is located deposits of bauxite depth dolomite ridge embedded feet deep Floyd county following analyses fragments Geological Survey Georgia Bauxite Georgia-Alabama gibbsite grade halloysite hard Hayes Hermitage district indicate iron oxide kaolin Knox dolomite light-colored limestone Long Tons Manufacturing Company masses matrix metal miles mineral Mining & Manufacturing occur oölitic opening ore-body Paleozoic Paleozoic Group pebble pisolitic type prevailingly prospecting region Rept Republic Mining rocks Rome shales silica SiO 2 H2O SiO 2 TiO Sixteenth Ann slope soft soluble alumina specimens Spencer structure Sup't surface Surv syenite test-pits TiO 2 SiO Total U. S. Geol vary Villeveyrac Vogelsberg Westerwald
Popular passages
Page 24 - The first discovery of bauxite in America was in 1887, at a point a few miles northeast of Rome, in Floyd county, Georgia. A few fragments of the unknown mineral were picked up on the Holland lot, two miles north of the Ridge Valley Iron Company's furnace at Hermitage. The intimate association, in this locality, of the bauxite with deposits of limonite, which latter deposits had been worked to some extent, led to the discovery of the mineral, bauxite. The bauxite fragments were highly ferruginous...
Page 56 - ... the ore bodies grouped into fairly well defined districts known as the Hermitage district and the Bobo district. The remaining counties include only one or two deposits each, widely separated, as a rule, from each other. The Hermitage district is the largest in the Paleozoic area. It includes an area more than 50 square miles, lying between Rome, Kingston and Adairsville, east of the Oostanaula River and north of the Etowah River. It further occupies the contiguous northeastern and northwestern...
Page 16 - The chemical composition and petrographical examination show the bauxite to be a decomposition product of basalt. By the weathering of the plagioclase feldspars, augite, and olivine, nearly all the silica had been removed, together with the greater part of the lime and magnesia; the iron had been oxidized and hydrate of alumina formed as shown by its easy solubility in hydrochloric acid. The residue of the silica had crystallized as quartz in the pores of the mineral. " The more detailed account...
Page 131 - The process consists in providing a bath of fused fluorides to which alumina is added, and then reducing this alumina by the current from a dynamo. The bath is contained in carbon-lined iron pots or crucibles, which form the cathodes, while the anodes are large carbon cylinders which are made to dip into the baths. The specific gravity of aluminum being greater than that of the bath employed, the metal sinks to the bottom of the pots, and can be tapped off. To make alloys, the required metal (eg,...
Page 138 - The 5 to 7 per cent, aluminum bronzes have a specific gravity of 8.30 to 8, and are of a handsome yellow color, with a tensile strength of from 70,000 to 80,000 pounds per square inch, an elastic limit of 40,000 pounds per square inch. It will probably be bronzes of this latter character that will be most used, and the fact that such bronzes can be rolled and hammered at a red heat with proper precautions will add greatly to their use. Metal of this character can be worked in almost every way that...
Page 16 - Hadamar, in the neighborhood of Lesser Steinheim, near Hanau, and especially the western slope of the Vogelsberg. Chemical analyses show certain differences in the composition of bauxite from different places, the smaller amount of water in the French bauxite referring it to diaspore, while the Vogelsberg mineral is probably Gibbsite (hydrargillite). The bauxites of Ireland, of the Westerwald, and the Vogelsberg, show by certain external indications their derivation from basalt.
Page 16 - Vogelsberg bauxite showed that most specimens still possessed a basaltic (anamesite) structure, which enabled the author to determine the former constituents with more or less certainty. The clays from different points in the district carrying basalt, basaltic iron ore, and bauxite were examined, some of which showed clearly a sedimentary character. Some of the bauxite nodules were a foot and a half in diameter and possessed no characteristic form. They were of an uneven surface, light to dark brown,...
Page 50 - ... clay. The silica is usually present in the form of the hydrated aluminum silicate clay, which is invariably admixed in varying proportions with the bauxite. It is also present, to some extent, as free silica, as is shown by the microscope. In addition to these, other common impurities, such as lime, magnesia, phosphoric and carbonic acids, and sometimes the alkalies, soda and potash, amounting to, usually, scarcely more than a trace in each case, are mentioned by various writers. The Georgia...
Page 133 - Powdered aluminum mixed with chlorate of potassium has been used for flashlights instead of magnesium. It is said to make an excellent light and to give no smoke like magnesium. "Mr. Alfred E. Hunt, president of the Pittsburg Reduction Company, in a lecture delivered in March, 1891, gives some information in regard to the use of aluminum in railroad work. He says that the metal has been used, on account of its lightness, for slide valves (experimentally) ; for valves...
Page 132 - Uses. — Besides the metallurgical use of aluminum in casting iron and steel, to be referred to below, the metal is used for an infinity of small articles as has always been the case, and for which its lightness, strength, and freedom from tarnish eminently adapt it. Indeed, with a total production of between 500 and 600 tons, of which, perhaps, 300 only are available for manufactured articles, no extensive use on the large scale could be expected. The newspapers have frequently spoken of the Swiss...