Mineral Resources of the United States, Part 1U.S. Government Printing Office, 1917 - Digital images |
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alloys aluminum amalgamation amounted Antimony Arizona average value bauxite California cent copper chalcopyrite Colorado compared concentrating plant Creek crude cyanide deposits district.-The dredges Dry or siliceous exports feet flotation Fluorspar furnace galena geology gold and silver grade gross tons hematite Idaho important included Lake largest lead and zinc lead concentrates lead-zinc lease lessees lode long tons magnetite manganese metals Mineral Resources Missouri Montana Nevada nickel old tailings operated ounces of gold ounces of silver oxide pig iron placer gold placer mines placer production platinum pounds in 1914 pounds of copper pounds of lead pounds of zinc produced in 1915 production of gold pyrite quicksilver recovered recovery refined Rept rock shaft shipments short tons silver mills small quantity smelters smelting sold or treated sphalerite sphalerite concentrates sulphide Survey Bull total value troy ounces U. S. Geol United Utah yielded zinc carbonate zinc concentrates zinc silicate
Popular passages
Page 722 - Co. the composition is 67 per cent nickel, 28 per cent copper, and 5 per cent other metals, probably mostly iron and a little cobalt.
Page 776 - WATSON, TL, and TABER, STEPHEN, Geology of the titanium and apatite deposits of Virginia: Virginia Geol.
Page 104 - Missouri reach in a more or less connected belt from the region of Benton, Pettis, Morgan. Moniteau, Cole, and Miller counties on the northwest to the northern and eastern flanks of the St. Francis Mountains on the southeast. It is also true that there are scattered areas where more or less mining has been done all the way between the northwest end of this belt and the Joplin region, so that strictly speaking the lead and zinc deposits of Missouri practically form a zone around the northern half...
Page 48 - ... field. The mines are principally in Boone and Marion counties and in the adjoining portions of Searcy and Newton counties, though there are also numerous mines and prospects in Baxter, Izard, Sharp, Lawrence, and other counties to the east, and deposits have been worked in Washington and Sevier counties, on the extreme western border of the State. The ores are galena, sphalerite, and smithsonite, and the concentrates produced are generally of high grade and free from or very low in iron or lime....
Page 283 - The following table shows the total production of the Lake Superior district, by ranges. The figures prior to 1872 were collected by AP Swineford, editor Marquette Mining...
Page 727 - Board, and the Bureau of Foreign and Domestic Commerce of the Department of Commerce.
Page 718 - Nickel, nickel oxide, alloy of any kind in which nickel is a component material of chief value, in pigs, ingots, bars, rods, or plates, six cents per pound; sheets or strips, thirty-five per centum ad valorem.
Page 789 - ... because it is formed by the decay of uranium, a process which is wonderfully slow, and radium itself decays and changes to other elements so rapidly that it is impossible for it to accumulate naturally in visible masses.
Page 168 - For the early years the figures are probably far from being correct, but they are based on the best information now available.
Page 79 - ... produced in Missouri in 1915 was $53,583,760, an increase of $27,748,636 over that of 1914. The production of lead concentrates in Missouri in 1915 (of which all but 215 tons was galena) was 312,567 short tons, valued at $14,579,361, as compared with an output of 279,854 tons, valued at $11,143,104 in 1914, an increase of 33,713 tons in quantity and of $3,436,257 in value. Of this production in 1915 of lead concentrates 278,104 tons, valued at $12,773,579, was derived from southeastern and central...