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aluminum amalgamation amounted Arizona average value bodies Bull bullion California capacity carbonate carrying cent Colorado compared completed concentrates considerable containing continued cost County Creek crude cyanide decrease deep mines deposits district district.—The domestic dredges equipped feet figures furnace galena given gold and silver grade gross ground Hill important included increase industry iron Lake land largest lease less lessees long tons material metals Michigan miles mill Mineral Mineral Resources Missouri months Mountain nearly North opened operated ounces of silver output oxidized placer plant platinum pounds of copper pounds of lead principal production quantity range recovered recovery refined region reported resulted River rock separate shaft shipments shipped short tons shows siliceous small quantity smelters smelting sold South sphalerite sulphide Survey tailings tion total value treated U. S. Geol United yielded zinc
Page 762 - WATSON, TL, and TABER, STEPHEN, Geology of the titanium and apatite deposits of Virginia: Virginia Geol.
Page 758 - These publications, except those to which a price is affixed, can be obtained free by applying to the Director, United States Geological Survey, Washington, DC The priced publications may be purchased from the Superintendent of Documents, Government Printing Office, Washington, DC ADAMS, GI, and others.
Page 120 - The lead and zinc mines of Wisconsin are in Grant, Iowa, and Lafayette counties and comprise the most important part of the ore deposits of the upper Mississippi Valley region, a historical review of which is given in the Illinois section of this report in Mineral Resources for 1914. A detailed description of the Wisconsin lead and zinc districts and of the mines in each district to the year 1906 is given by Bain.1...
Page 54 - The lead and zinc deposits of Illinois fall into two distinct regions marked by different mineral association and structural environment. Those of southern Illinois belong to the Kentucky-Illinois fluorspar district; those of northern Illinois belong to the upper Mississippi Valley region. NORTHERN ILLINOIS. The lead and zinc mines of northern Illinois are all in Jo Daviess County, the extreme northwest county of the State.
Page 313 - Report on the geology and mineral resources of the central mineral region of Texas: Texas Geol.
Page 146 - MINET, ADOLPHE, The production of aluminum and its industrial use, 1st ed., corrected (translated with additions by Leonard Waldo), 266 pp., 57 ills., New York, John Wiley & Sons, 1910.
Page 54 - ... shafts and by drilling. The ore deposits occur in the Galena dolomite and in the upper part of the Platteville limestone, both of Ordovician age. The ores are galena, smithsonite, and sphalerite, though the two latter are much less common now than formerly, when the deposits worked were mostly shallow and above water level. In early years the galena ores only were mined and the ore was taken from shallow pockets in quantities ranging from a few tons to several thousand. Although the lead output...
Page 266 - Gogebic producing in 1915 about 313,000 tons less than the State of Alabama, which is the next State in importance as a producer after Minnesota and Michigan. The Vermilion range is the fifth in importance of the six producing ranges of the Lake Superior district.
Page 129 - Origin of the zinc and lead deposits of the Joplin region, Missouri, Kansas, and Oklahoma: Bull.