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34. Geology and Ore Deposits of the Western San Juan Mountains, Colorado
By Wilbur S. Burbank, Robert G. Leudke
The impressive western San Juan Mountains of Colorado were carved by Pleistocene and Recent erosion from a thick blanket of Tertiary volcanic rocks that rests upon a basement of metamorphic, sedimenta
Jan 1, 1968
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35. The Uranium and Vanadium Deposits of the Colorado Plateau Region
By R. P. Fischer
The Colorado Plateau region has been the principal domestic source of uranium, vanadium, and radium. The value of these commodities produced from the region through 1964 slightly exceeds $2 billion. M
Jan 1, 1968
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36 Years of Subsidence Reporting at the ICGCM
By Nicole E. Evanek, Anthony T. Iannacchione
"Over the past 36 years, a great deal of information has been presented and discussed at the International Conference on Ground Control in Mining (ICGCM). The topic of surface subsidence engineering h
Jan 1, 2018
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36. Uranium Deposits of the Grants Region
By Paul E. Melancon, Vincent C. Kelley, Dale F. Kittel
Uranium of the Grants region occurs predominantly in continental sandstones of the upper part of the Jurassic Morrison Formation, but significant lesser deposits are found in limestone of the Jurassic
Jan 1, 1968
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37. Geology and Exploitation of Uranium Deposits in the Lisbon Valley
By Hiram B. Woon
Uranium ore deposits in the Lisbon Valley area are in an arcuate belt, 15 miles long by one-half-mile wide, on the southwest flank of the Lisbon Valley anticline. They range in size from 500 to 1,500,
Jan 1, 1968
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38. The Uranium Mining Industry and Geology of the Monument Valley and White Canyon Districts, Arizona and Utah
By Roger C. Malan
The Monument Valley and White Canyon districts are in northeastern Arizona and southeastern Utah. Exploration and mining for uranium has been conducted in these districts since the late 1940's. In Jul
Jan 1, 1968
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39. Geology and Uranium-Vanadium Deposits in the Uravan Mineral Belt, Southwestern Colorado
By E. Motica
Ores containing uranium and vanadium minerals have been mined from the Salt Wash Member of the Morrison Formation from many localities in the Colorado Plateau region since about 1900. The most product
Jan 1, 1968
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3D mine mapping – improving grade control and reconciliation in underground mines using photogrammetric imagery and implicit modelling techniques
By R H. Knight
Production mine geology must be accurate and efficient in order to reduce risk and ensure that ore value and mining operation revenue are maximised. Present grade control practices are commonly based
Sep 20, 2017
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3D Modelling of Mine Backfill
By Muhammad Zaka Emad, Rangzeb Goraya, Muhammad Usman Khan
"Numerical modeling has been used extensively to assess the stability of surface and underground mines. Tabular, steeply dipping ore bodies are generally mined out by open stoping methods with delayed
Jan 1, 2017
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3D Numerical Analyses of Temperature Field for Construction of Connecting Passage in Metro Using Artificial Freezing Method
By Jian-bin Xie, Lin-fang Shen, Zhi-liang Wang
"In order to research temperature field for construction of connecting passage in Metro using artificial freezing method, the finite difference software FLAC3D is employed to numerically simulate cons
Jan 1, 2015
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4 Equipment Installation: Recent Developments - Equipment Installation - Recent Developments: General Report On 'Deep Foundation Installation Monitoring' - 1. Introduction
By B. De Paoli
At Pietrafitta, between Assisi and Perugia, ENEL (Italian National Electricity Authority) has for some time been managing a power-station operated with lignite, mined from an open mine on the way to e
Jan 1, 1994
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4. Triassic Magnetite and Diabase at Cornwall, Pennsylvania
By Davis M. Lapham
Ore bodies at Cornwall, Pennsylvania, have been mined since 1742 principally for iron from magnetite, but also for copper (in chalcopyrite), silver (in chalcopyrite), gold (in chalcopyrite), cobalt (i
Jan 1, 1968
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40 Years of Experience in the Use of Umbrella Arch Method in Tunneling: Problems and Solutions
By Georgios Kalamaras, Sebastiano Pelizza, Carlo Alessio
"This article describes, through the presentation of five cases-history, technological advances that the Authors together with Tunneling Contractors devised for coping with adverse geotechnical condit
Jan 1, 2016
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40 Years of Flash Smelting Operations in Huelva: Learning from our History
By J. C. Moreno, G. Rios, M. Palacios
The Huelva smelter was commissioned in 1970 coinciding with the shutdown of the old smelter in the Rio Tinto mine site. That new smelter consisted of two Momoda blast furnaces with a capacity of 500 d
Jan 1, 2014
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40. Uranium Deposits of Wyoming and South Dakota
By E. N. Harshman
Uranium mining and milling are rather new industries in Wyoming and South Dakota, but, in the past 15 years, ore valued at more than $400,000,000 has been mined and milled in the region. The major ura
Jan 1, 1968
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41. Uranium in the Black Hills
By Olin M. Hart
Uranium ores occur in the Lower Cretaceous Inyan Kara group of heterogeneously stratified fluvial and fluvial-marine sandstones in the Black Hills of western South Dakota and northeastern Wyoming. The
Jan 1, 1968
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44. Review of the Exploration and Development of the Mount Pleasant Mines, New Brunswick, Canada ? Introduction
By Harold Bloom
The Mount Pleasant Mines, or Mount Pleasant Joint Venture as it is presently known, is located approximately 59.5 km (37 miles) south of Fredericton, NB, Canada. Earliest indications of mineralization
Jan 1, 1991
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44. Western Utah, Eastern and Central Nevada
By William Paxton Hewitt
Mineral deposits of western Utah and eastern and central Nevada have produced in excess of $8,500,000,000 since 1871. Through 1965, Bingham Canyon had produced over $4,600,000,000 and seven other camp
Jan 1, 1968
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45. Non-Porphyry Ores of the Bingham District, Utah
By R. D. Rubright, Owen J. Hart
In the Bingham district over a span of more than 90 years, 43,947,104 tons of "non-porphyry" copper, lead, zinc, gold, and silver ore have been mined from a folded and faulted alternating series of Pe
Jan 1, 1968
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46. Fine Gold Occurrence at Carlin, Nevada
By Paul F. Kerr, Donald M. Hausen
Fine colloidal gold near Carlin, Nevada is disseminated in leached carbonate strata of the Roberts Mountains Formation in the Lynn "window" of the Roberts Mountains thrust fault. The ore body is gener
Jan 1, 1968