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The NEPA Permitting Process (USA)By Duane L. Whiting
The National Environmental Policy Act of 1969 (NAPA) provides guidance for federal agencies in making informed decisions. The Act has been used to determine the potential environmental impacts from mi
Jan 1, 1998
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The Mount Polley alkalic porphyry copper-gold deposit, south-central British ColumbiaBy D. Gorc, T. M. Fraser, Z. T. Nikic, R. Pesalj
"Mount Polley is an alkalic porphyry copper-gold deposit of Lower Jurassic age within the Quesnel terrane in south-central British Columbia. The silica-saturated Mount Polley intmsive complex is assum
Jan 1, 1995
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RI 5156 Principles Of Reinforcing Bedded Mine Roof With Bolts - Introduction And SummaryBy Louis A. Panek
Roof bolting has been known for many years, although the practice had very limited application before 1948. Since then, bolting has been introduced as a systematic method of support in more than 700 c
Jan 1, 1956
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RI 7960 Evaluation of a Novel Electrophoretic Separation Method To Remove Pyritic Sulfur From CoalBy K. J. Miller
Electrophoretic mobility measurements of coal and pyrite particles in distilled water revealed a difference between the migration speeds of the two materials toward the anode in a dc electric field. T
Jan 1, 1974
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RI 7760 Resource Recovery From Raw Urban RefuseBy P. M. Sullivan
At its College Park Metallurgy Research Center in Maryland, the Bureau of Mines has installed and is operating a 5-ton-per-hour pilot plant for continuous mechanical separation of values contained in
Jan 1, 1973
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Caving and Subsidence at the Copper Mountain MineBy W. L. Nelson
The orebodies at Copper Mounta1n lie along and within a few hundred feet of the contact of an intrusive stock of gabbro with a series of bedded volcanic rocks of the Nicola formation. These. orebodies
Jan 1, 1950
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The Application of Trackless Equipment and Conveyor Hoisting at Dumbarton Mines LimitedBy C. P. Moore, G. W. Taylor
Vertically dipping lenses of nickel-copper ore at Dumbarton Mines Limited are being mined by a modified blasthole stoping method. The principal access to the mine is provided by a 15-degree decline, w
Jan 1, 1973
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The structural evolution of the Casa-Berardi East Gold Deposit, Casa-Berardi Township, QuebecBy Real Daigneault, François Robert, J. Paul Golightly, Jean-Yves Cloutier, Jayanta Guha, Pierre Pilote
"The Casa-Berardi East, Center and West deposits, located in the Archean Abitibi, Sub province, are hosted by volcanic and sedimentary units of varying compositions, less than300 m from the Casa-Berar
Jan 1, 1990
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IC 9432 Mechanical Excavation Systems (In Three Parts) 3. Environmental ApplicationsIn this U.S. Bureau of Mines report, proposed narrow-vein and longwall mining concepts using drill-split technology (described in part 1 of this series) and in situ liner concepts (described in part 2
Jan 1, 1995
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Unsustainability of Very Large Gold Producers—12 Years LaterBy H. R. Bullis
"A 2003 paper discussed the idea that as gold mining companies grow larger it becomes more difficult for them to discover or acquire new gold deposits large enough to replace extracted reserves on an
Jan 1, 2019
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Gold-Vanadia Supported Catalysts for Complete Oxidation of HydrocarbonsBy Donka H. Andreeva
Gold catalysts based on different supports, titania, zirconia, ceria and mesoporous titania and zirconia, nonpromoted and promoted by vanadia in the reaction of complete benzene oxidation have been st
Oct 1, 2003
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Institute of Metals Division - Density Anomalies in Binary Aluminum Solid SolutionsBy W. J. Helfrich, R. A. Dodd
Binary aluminum solid-solution alloys containing various amounts of silver, magnesium, and zinc were prepared by careful directional solidification, and the hydrostatic and X-ray densities were compar
Jan 1, 1962
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The Metallurgy Of The Precious Metals As Affected By Their Mineralogy And Manner Of Occurrence In Their OresBy Claudia Gasparrini
Gold, silver and platinum-group elements occur normally in very low concentrations in their ores. Because their market value is in many situations high enough to justify their full recoveries, mineral
Jan 1, 1984
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RI 6826 Two- And Three-Phase Relative Permeability StudiesBy Erie C. Donaldson
Gas-displacement tests were made in Berea Sandstone and Arbuckle Lime-stone cores to determine the relative permeabilities to gas, oil, and water for two-and three-phase dynamic systems. Three-phase r
Jan 1, 1966
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Indicator Conditioned Estimator (25d65824-d33d-4da1-8117-5abe26a82e3f)By H. Zhu
Qualitative and interpretative information as obtained from geological and/or geophysical studies, in addition to precise measurement, is incorporated into the estimation process through an indicator
Jan 1, 1989
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Application Of Geology At The Butler And National Taconite Operations On The Mesabi Range ? IntroductionBy John S. Owens
The National Steel Pellet Project and the Butler Taconite Project are operated by The Hanna Mining Company in the vicinity of the towns of Keewatin and Nashwauk, on the western Mesabi Range. Productio
Jan 1, 1968
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Alkaline Arsenic Leaching From Smelter Flue Dust And Leaching Solution RegenerationBy A. Robles
The main goal of the present work is to propose a viable alternative for selective arsenic elimination from copper smelter flue dust without the need of a global leaching scheme for all the individual
Jan 1, 1999
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Recovery of Vanadium From Waste Solids and Solutions Using an Ion Exchange ProcessBy J P. Wyethe, D P. Padayache, B R. Green
The development of an ion exchange process for the recovery of vanadium from solutions containing low concentrations of vanadium and/or slurries is discussed. The process can be used to improve overal
Jan 1, 2000
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RI 9566 - Influence of Environmental Factors on Spark Ignition ProbabilityBy Jeffrey Shawn Peterson
In past years, the U.S. Bureau of Mines has been involved in safety research that could ultimately re-late the conditions of spark testing and actual use by estimating the simple ignition probability
Jan 1, 2010
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Biographical Notice Of Charles B. Dudley, Ph.D.By R. W. Raymond
(Pittsburg Meeting, March, 1910.) IN the long list of our illustrious and lamented dead, there are names which recall personality as well as career and achievement; social as well as scientific merit
Jun 1, 1910