Mineral Resources of the United States, Parte1U.S. Government Printing Office, 1909 |
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Página 6
... carrying out these cooperative agreements is threefold : 1. The avoidance of annoyance to the producers in the form of duplicate requests for statistical information . 2. The securing of prompter and more complete returns , and 3. The ...
... carrying out these cooperative agreements is threefold : 1. The avoidance of annoyance to the producers in the form of duplicate requests for statistical information . 2. The securing of prompter and more complete returns , and 3. The ...
Página 8
... carrying from 20 to 40 per cent of manganese , were produced to the extent of 55,620 long tons , valued at $ 132,556 in 1908 , as against 103,844 long tons , valued at $ 259,473 in 1907 , and 41,300 long tons , valued at $ 122,400 in ...
... carrying from 20 to 40 per cent of manganese , were produced to the extent of 55,620 long tons , valued at $ 132,556 in 1908 , as against 103,844 long tons , valued at $ 259,473 in 1907 , and 41,300 long tons , valued at $ 122,400 in ...
Página 90
... carrying 60 to 70 per cent metallic iron , to impure mixtures of magnetite with minerals composing the wall rock , such as quartz , feldspar , pyroxene , horn- blende , etc. When ores contain less than 50 per cent iron they re- quire ...
... carrying 60 to 70 per cent metallic iron , to impure mixtures of magnetite with minerals composing the wall rock , such as quartz , feldspar , pyroxene , horn- blende , etc. When ores contain less than 50 per cent iron they re- quire ...
Página 91
... carrying these minerals in minor quan- tities . The richest titaniferous iron ores contain about 60 per cent iron , this being somewhat lower than the percentage of iron in the non- titaniferous ores . The titanic oxide ( TiO , ) is ...
... carrying these minerals in minor quan- tities . The richest titaniferous iron ores contain about 60 per cent iron , this being somewhat lower than the percentage of iron in the non- titaniferous ores . The titanic oxide ( TiO , ) is ...
Página 96
... carrying oxygen and carbon dioxide . The concentration of the ores has been found to occur where such waters have been converged . Various factors have determined this convergence - fracturing and brecciation of the iron formation ...
... carrying oxygen and carbon dioxide . The concentration of the ores has been found to occur where such waters have been converged . Various factors have determined this convergence - fracturing and brecciation of the iron formation ...
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Términos y frases comunes
10-stamp mill amounted Arizona average value bauxite bullion cadmium California carbonate Carolina chalcopyrite chromite clay Colorado concentrating mill containing copper Copper Company County in 1908 Creek crude cyanide cyanide plant decrease deep mines deposits district.-The dredge drift feet deep following table furnace Geological gold and silver Gold Mining Company granite hematite hübnerite hydraulic Idaho important increase lead and zinc limestone lode long tons magnetite manganese metals miles mineral products Mining and Milling Mountain Nevada North occur operated ounces of gold ounces of silver output oxide pig iron placer mines platinum pounds of copper pounds of lead production in 1908 production of gold pyrite quartz refined reported rock scheelite schists shipments short tons siliceous silver mills small quantity smelters smelting South steel sulphide Survey tonnage total value treated tungsten tunnel U. S. Geol United Utah veins Virginia wolframite yield zinc blende
Pasajes populares
Página 238 - ... estimated duties for the transportation of the ores by common carriers bonded for the transportation of appraised or unappraised merchandise to properly equipped sampling or smelting establishments, whether designated as bonded warehouses or otherwise. On the arrival of the ores at such establishments they shall be sampled according to commercial methods under the supervision of Government officers, who shall be stationed at such establishments, and who shall submit the samples thus obtained...
Página 238 - ... they shall be sampled according to commercial methods under the supervision of Government officers, who shall be stationed at such establishments, and who shall submit the samples thus obtained to a Government assayer, designated by the Secretary of the Treasury, who shall make a proper assay of the sample, and report the result to the proper customs officers, and the import entries shall be liquidated thereon, except in case of ores that shall be removed to a bonded warehouse to be refined for...
Página 77 - Newfoundland into this country during the year 1907; whilst, according to the statistics published by the Bureau of Statistics of the Department of Commerce...
Página 236 - States as shown by the report of the Bureau of Statistics of the Department of Commerce and Labor...
Página 132 - XLV. 463 pp. 1903. CLEMENTS, JM, SMYTH, HL, BAYLEY, WS, and VAN HISE, CR The Crystal Falls iron-bearing district of Michigan. Monograph XXXVI. 512 pp. 1899.
Página 695 - UDDEN, JA A sketch of the geology of the Chisos country, Brewster County, Texas.
Página 5 - The statistics of the imports and exports of minerals, which form an essential part of the volume, are obtained through the courtesy of the Chief of the Bureau of Statistics, Department of Commerce and Labor.
Página 83 - ... and shale, and is consequently of no possible value; and finally the upper bench itself becomes shaly and carries only a very low-grade ore. The Irondale seam is best developed on Red Mountain between Pilot Knob on the northeast and Lone Pine Gap on the southwest. Southwest of Lone Pine Gap the seam either consists of interbedded low-grade iron ore and shale or else its identity is completely lost. Its soft ore, now nearly all mined out either by surface trenches or slopes, is the best in the...
Página 220 - ... and rolling, but is suitable for copper castings, and a large part of it is put to that use. Lake copper excepted, a comparatively small percentage of the copper output carries such low values in precious metals that, together with the value added to the copper by electrolytic refining, these values will not more than pay for the electrolytic refining of the copper; consequently the output of casting copper is comparatively small.
Página 238 - ... satisfactory bonds be designated as bonded smelting warehouses. Ores or crude metals may be removed from the vessel or other vehicle in which imported, or from a bonded warehouse, into a bonded smelting warehouse without the payment of duties thereon and there smelted or refined, or both, together with...