Bulletin of the American Institute of Mining Engineers, Issues 117-120The Institute, 1916 - Mineral industries |
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Page 1412
... considerable thickness of rhyolitic lavas has accumulated . The character of these later dikes and flows is exactly the same as that of the volcanic plug with flow structure which is found in the Naco hills and is mentioned by Ransome ...
... considerable thickness of rhyolitic lavas has accumulated . The character of these later dikes and flows is exactly the same as that of the volcanic plug with flow structure which is found in the Naco hills and is mentioned by Ransome ...
Page 1426
... considerable throw , the Oliver Fault , which dips about 60 ° S.W. This fault increases in magnitude toward the southeast and where it is finally covered by Quarternary wash , about halfway between Don Luis and the Country Club , it ...
... considerable throw , the Oliver Fault , which dips about 60 ° S.W. This fault increases in magnitude toward the southeast and where it is finally covered by Quarternary wash , about halfway between Don Luis and the Country Club , it ...
Page 1432
... considerable economic importance and the underground search for ores cannot be aided by the same indi- cations as in the higher limestones . CONTACT AND HYDROTHERMAL METAMORPHISM That the granite - porphyry intrusion was the supreme ...
... considerable economic importance and the underground search for ores cannot be aided by the same indi- cations as in the higher limestones . CONTACT AND HYDROTHERMAL METAMORPHISM That the granite - porphyry intrusion was the supreme ...
Page 1433
... considerable pyritization , but this very soon fades out into the unaltered schist . Underground , in tracing out the zones of rock alteration due to the intrusion and its accompanying solutions , it has been found that they roughly ...
... considerable pyritization , but this very soon fades out into the unaltered schist . Underground , in tracing out the zones of rock alteration due to the intrusion and its accompanying solutions , it has been found that they roughly ...
Page 1435
... considerable alteration are encountered far from any known porphyry , in which case it may be that solutions have traveled along fractures , or that they may have come with undiscovered porphyry . Usually , however , the copper ores ...
... considerable alteration are encountered far from any known porphyry , in which case it may be that solutions have traveled along fractures , or that they may have come with undiscovered porphyry . Usually , however , the copper ores ...
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Common terms and phrases
Abrigo acid actinolite alteration American Anaconda andesite aplite Ariz Arizona Meeting ARTHUR Asst average beds Bisbee Born bornite breccia burning calcite Cananea carbonate cent Chairman chalcocite chalcopyrite CHARLES chloritic chrysotile Coal Colo concentrates Cons Copper cristobalite crystals deposits Dept diabase dikes diorite discussion district Engr Engrg epidote Escabrosa fault flotation machines formation furnace Geological GEORGE Gold grains granite Heated igneous Institute iron leaching limestone magnetite manganese mass material metamorphism Miami mill mineral Mining Engineers operation orebodies oxidized paper phosphate plant Plate porphyry Present position production Proposed pulp pyrite quartz quartzite Reheated rhyolite sand schist School of Mines Section sediments sericite shaft shales shown silica silica brick slag slime Smelt smelter solution steel sulphides sulphur Supt surface Table tailings tank temperature tests tion tons tridymite Univ Utah veins Vice-Chairman West WILLIAM York zinc zone
Popular passages
Page 1892 - States as may be designated, and the Academy shall, whenever called upon by any department of the Government, investigate, examine, experiment, and report upon any subject of science or art, the actual expense of such investigations, examinations, experiments, and reports to be paid from appropriations which may be made for the purpose, but the Academy shall receive no compensation whatever for any services to the Government of the United States.
Page 1700 - That any person authorized to enter lands under the mining laws of the United States may enter and obtain patent to lands containing petroleum or other mineral oils, and chiefly valuable therefor, under the provisions of the laws relating to placer mineral claims...
Page 1467 - DISCUSSION OF THIS PAPER IS INVITED. It should preferably be presented in person at the New York meeting, February, 1916, when an abstract of the paper will be read.
Page 2086 - The American Society of Civil Engineers, the American Society of Mechanical Engineers, the American Institute of Electrical Engineers...
Page 1891 - ... increase of domestic production of articles and materials essential to the support of armies and of the people during the interruption of foreign commerce...
Page 1693 - ... no location of a mining claim shall be made until the discovery of the vein or lode within the limits of the claim located.
Page 2119 - February, 1917, when an abstract of the paper will be read. If this is impossible, then discussion in writing may be sent to the Editor, American Institute of Mining Engineers, 20 West 39th Street, New York, NY, for presentation by the Secretary or other representative of its author.
Page 1891 - Defense to supervise and direct investigations and make recommendations to the President and the heads of...
Page 1378 - Societies are open from 9 AM to 9 PM on all week-days, except holidays, from September 1 to June 30, and from 9 AM to 6 PM during July and August.
Page 2086 - LIBRARY. AMERICAN INSTITUTE OF ELECTRICAL ENGINEERS. AMERICAN SOCIETY OF MECHANICAL ENGINEERS. AMERICAN INSTITUTE OF MINING ENGINEERS.