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Articles 29011 - 29040 of 29714
Full-Text Articles in Physical Sciences and Mathematics
The Renova "Syenite" Porphyry Madison County, Montana, James H. Clement
The Renova "Syenite" Porphyry Madison County, Montana, James H. Clement
Bachelors Theses and Reports, 1928 - 1970
Unique feldspar porphyries, syenitic in appearance, and granitic in composition, form an unusually thick sill intruding pre-Cambrian Belt graywacke about eight miles south of Whitehall in southwestern Montana. Commercial deposits of gold and silver ores occur nearby, and may possibly be genetically related to the porphyry, although direct association is not evident. The geologic age is believed to be late Cretaceous or early Tertiary, and the sill may be related to the Tobacco Root batholith.
Sur Les Possi̇bi̇li̇tes D'Uti̇li̇sati̇on Des Aluni̇tes De Turqui̇e Et Les Essai̇s Effectues Sur Les Echanti̇llons De Şebi̇nkarahi̇sar, Raşit Tolun
Bulletin of the Mineral Research and Exploration
No abstract provided.
Dokümantasyon Mi̇krofi̇lm Ve Mi̇krokartlar Yeni̇ Bi̇r Dokümantasyon Tekni̇ği̇, Recep Egemen
Dokümantasyon Mi̇krofi̇lm Ve Mi̇krokartlar Yeni̇ Bi̇r Dokümantasyon Tekni̇ği̇, Recep Egemen
Bulletin of the Mineral Research and Exploration
No abstract provided.
Alüni̇tleri̇mi̇zden İsti̇fade İmkânlari Ve Şebi̇nkarahi̇sar Ci̇varina Ai̇t Numunelerle Yapilan Tecrübeler, Raşit Tolun
Alüni̇tleri̇mi̇zden İsti̇fade İmkânlari Ve Şebi̇nkarahi̇sar Ci̇varina Ai̇t Numunelerle Yapilan Tecrübeler, Raşit Tolun
Bulletin of the Mineral Research and Exploration
No abstract provided.
The Ankara Melange And The Anatoli̇an Thrust, E. B. Bailey, W. J. Mccallien
The Ankara Melange And The Anatoli̇an Thrust, E. B. Bailey, W. J. Mccallien
Bulletin of the Mineral Research and Exploration
No abstract provided.
Etütler Ankara Melanji Ve Anadolu Şari̇aji, E. B. Bailey, W. J. Mccallien
Etütler Ankara Melanji Ve Anadolu Şari̇aji, E. B. Bailey, W. J. Mccallien
Bulletin of the Mineral Research and Exploration
No abstract provided.
An Investigation Into The Precipitation Of Copper From Mine Water By Cupric Copper Reduction, And The Subsequent Precipitation Of Copper As Cuprous Chloride, Jack T. Gentry
Bachelors Theses and Reports, 1928 - 1970
The objective of this thesis is to determine the possibility of applying a different method to the recovery of the copper dissolved in the Butte mine waters, and thereby precipitate a purer cement copper with greater efficiency and less iron consumption.
Geology Of The Southern Ladron Mountains, Socorro County, New Mexico, E.A. Noble
Geology Of The Southern Ladron Mountains, Socorro County, New Mexico, E.A. Noble
Earth and Planetary Sciences ETDs
The Ladron Mountains are in a fault-block range consisting in large part of Pre-Cambrian rocks. They are flanked on the west by Paleozoic sediments and elsewhere by Tertiary and Quaternary deposits. The Pre-Cambrian rocks of the southern Ladron Mountains consist of a thick sequence of quartzite and schist which has been granitized by a sub-adjacent intrusion to such a degree that only remnants of unaltered quartzite and schist remain, the remainder of the rocks being largely paragneiss and para-granite. The nature of the intrusion is not known, but it is suggested that it may have been at least partly formed …
Pebbles In The Glacial Till Of Eastern North Dakota, Alice E. Russell
Pebbles In The Glacial Till Of Eastern North Dakota, Alice E. Russell
Theses and Dissertations
The paper is a study of twenty-three samples of glacial in eastern North Dakota. The samples were analyzed in terms of lithology, shape, and roundness. Graphs are given showing the relationships among the various factors. The graph are discussed and significance of the various factors affecting the pebbles are evalnated.
An Ecological Study Of The Foraminifera Of Mason Inlet, North Carolina, Daniel N. Miller Jr.
An Ecological Study Of The Foraminifera Of Mason Inlet, North Carolina, Daniel N. Miller Jr.
Masters Theses
"Mason Inlet. North Carolina is a lagoonal marsh area with warm-temperate water, the salinity ranging from fresh to salt water. Nine collecting stations comprise an ecological gradient across the environment.
Forty-two species of foraminifera are recorded from the inlet, ranging in their affinities from brackish water to open-sea facies. Several extensions of range are recorded both northward and southward.
Substratum conditions apparently control the distribution of foraminifera within the inlet. Clean, fine sand provided the largest faunal populations. A depauperate assemblage was found in an inorganic, argillaceous substratum. The largest population of arenaceous forms was found at the channel through …
Geology Of The Crystal Mine, Hardin County, Illinois, John Amsden Emery
Geology Of The Crystal Mine, Hardin County, Illinois, John Amsden Emery
Masters Theses
"The study of the geology and mineralization of the Crystal Mine was undertaken at the suggestion of Mr. Dodson G. Gibson of the Crystal Fluorspar Company, who allowed access to the mine and its records for this purpose. The problem was to develop a system of prospecting the so-called bedded-replacement fluorspar deposits of Hardin County, Illinois. It is believed that an economically feasible method has been developed. This method involves not only the actual finding of fluorspar, but also serves as a guide in revealing structural trends suggestive of mineralization.
The fluorspar deposits of the Crystal Mine are representative of …
A Subsurface Study Of The Pleistocene Deposits In Kearney County And Adjoining Parts Of Adams, Franklin, And Webster Counties (Includes Text Analyses And Thesis Material), Vincent H. Dreeszen
A Subsurface Study Of The Pleistocene Deposits In Kearney County And Adjoining Parts Of Adams, Franklin, And Webster Counties (Includes Text Analyses And Thesis Material), Vincent H. Dreeszen
Conservation and Survey Division
No abstract provided.
Generalized Soil Map Of Nebraska
Generalized Soil Map Of Nebraska
Conservation and Survey Division
No abstract provided.
Areas In Nebraska Of Subirrigated Vegetation, John Elder
Areas In Nebraska Of Subirrigated Vegetation, John Elder
Conservation and Survey Division
No abstract provided.
Purification Department Of Zinc Leaching Division At Anaconda, Montana, J. L. Brown
Purification Department Of Zinc Leaching Division At Anaconda, Montana, J. L. Brown
Bachelors Theses and Reports, 1928 - 1970
The original smelter, known as the Upper Works smelter, was located on the north side of the Warm Springs Creek, just 2 miles east of the city of Anaconda and 26 miles from the city of Butte. By the year 1894 this smelter had a capacity of 500 tons of ore a day.
The Vanadium Plant Of The Anaconda Reduction Works, Tom Liss
The Vanadium Plant Of The Anaconda Reduction Works, Tom Liss
Bachelors Theses and Reports, 1928 - 1970
No complete history of mining and smelting will ever be written that does not include a major discussion of the Butte district. The colorful tale of this area plays a major role in the interesting stories of mining. In the fields of mining methods, labor relations end financial manipulations, the Butte area has set a standard.
An Investigation Of The Radioactivity Of Oilwell Drilling Fluid, With Depth, Of Wells In The Berland Field Of Rooks County, Milford W. Johnston
An Investigation Of The Radioactivity Of Oilwell Drilling Fluid, With Depth, Of Wells In The Berland Field Of Rooks County, Milford W. Johnston
Master's Theses
In reviewing the foregoing literature and in consideration of the very important place of the state of Kansas in the nation's production of petroleum, it was thought that possibly a contribution might be made to the general subject of geophysical prospecting for oil by the adoption and execution of the problem proposed by the title of this thesis. Since a similar but more scattered study of this problem had been previously made by Lippert with the use of an electroscope, it was considered worth-while to repeat the electroscopic observations together with Geiger-Mueller Counter observations on a new series of wells …
A Study Of The Differential Seperation Of Galena And Sphalerite, Wilfred E. Nagel
A Study Of The Differential Seperation Of Galena And Sphalerite, Wilfred E. Nagel
Bachelors Theses and Reports, 1928 - 1970
The smelting of complex lead ores is a difficult operation, especially when they contain considerable amounts of iron and zinc. When these ores are smelted, all of the zinc, which is valuable and well worth recovering, goes into the slag. With the advent of the flotation processes, and the ability of these processes to concentrate the lead and zinc minerals into separate products, the smelting of complex lead ores was to a great extent simplified.
The Christensen Sillimanite Deposit Southeast Of Dillon, Montana, Everett O. Bracken
The Christensen Sillimanite Deposit Southeast Of Dillon, Montana, Everett O. Bracken
Bachelors Theses and Reports, 1928 - 1970
The minerals sillimanite, kyanite, andalusite, dumortierite, and topaz comprise a group of minerals whose high alumina content and physical properties are particularly desirable in the manufacture of refractory products. Sillimanite is the least plentiful of the minerals of this group, and for this reason it is not used extensively at the present time. However, it would be very desirable to the refractory industry if a suitable domestic source of supply could be established.
Petrography Of The Chilhowee Group, Near Walland, Tennessee, George David Swingle
Petrography Of The Chilhowee Group, Near Walland, Tennessee, George David Swingle
Masters Theses
Introduction: Time and the stratigraphic relationships of the Ocoee and Chilhowee groups have long been a problem in southern Appalachian geology. These rocks, now metamorphosed to varying degrees, outcrop over wide areas in the mountain region. Unfortunately, no one person has been able to study their problems in enough detail to unravel them and, as a result, many conflicting statements are in the literature.
Formations of the Ocoee and Chilhowee groups are largely composed of fine to coarse clastic sediments. In general, rocks of the Ocoee group lie to the southeast; those of the Chilhowee group to the northeast. The …
A Mineral Dressing And Economic Study Of A Complex Arsenical Ore, Luigi D. Piana
A Mineral Dressing And Economic Study Of A Complex Arsenical Ore, Luigi D. Piana
Bachelors Theses and Reports, 1928 - 1970
The factors that influence the choice of a method for treatment of an ore comprise the technical and economic limitations and advantages, derived in detail and balanced according to the exigencies of the particular situation.
Separation Of Cadmium From Zinc In The Purification Step Of The Leaching Cycle, L. C. Powell
Separation Of Cadmium From Zinc In The Purification Step Of The Leaching Cycle, L. C. Powell
Bachelors Theses and Reports, 1928 - 1970
The purpose of this investigation is to determine the effect of the factors listed previously by conducting a series of tests that will indicate the extent to which the purification is influenced by time, temperature, zinc oust size, zinc dust quantity, iron concentration, two stage precipitation, and aeration.
An Investigation Of The Precipitation Of Cobalt With Zinc Dust, Lyle Hallberg
An Investigation Of The Precipitation Of Cobalt With Zinc Dust, Lyle Hallberg
Bachelors Theses and Reports, 1928 - 1970
Cobalt, as well as copper, cadmium, and other impurities, is removed by selective precipitation with zinc during the zinc electrolyte purification cycle, and the purification residue may be treated by a Cadmium Plant for the recovery of cadmium.
Construction And Operation Of A Laboaratory Size Thum Cell, Raymond Dugdale
Construction And Operation Of A Laboaratory Size Thum Cell, Raymond Dugdale
Bachelors Theses and Reports, 1928 - 1970
Electrolytic silver refining was not perfected until the end of the nineteenth century. During the process of development, two systems of silver refining have come into prominence: the Moebius and the Thum types.
An Investigation Into The Precipitation Of Copper From Mine Water, Using Sulfur Dioxide To Reduce The Ferric Ion Content, David S. Gleason
An Investigation Into The Precipitation Of Copper From Mine Water, Using Sulfur Dioxide To Reduce The Ferric Ion Content, David S. Gleason
Bachelors Theses and Reports, 1928 - 1970
The experiments which were preformed showed that sulfur dioxide would reduce the ferric ion content of the mine waters to a very low figure. The reduction in the ferric ion content would improve the efficiency of the precipitation process, and also increase the recovery of copper.
Application Of The Electric Furnace To The Melting Of Cathode Copper At The Tacoma Smelter, Alvin H. Nelson
Application Of The Electric Furnace To The Melting Of Cathode Copper At The Tacoma Smelter, Alvin H. Nelson
Bachelors Theses and Reports, 1928 - 1970
In the field of copper metallurgy, the major changes effected in the original metallurgical scheme have been based largely upon the lowering in grade of copper ores, and the more particular demands of the fabricators of the metal. The former trend fostered the development of mineral beneficiation, which in turn caused the conversion from blast furnace to reverberatory furnace smelting.
An Investigation Of Silicon Impregnation Of Low-Carbon Steels, Thomas E. Groce
An Investigation Of Silicon Impregnation Of Low-Carbon Steels, Thomas E. Groce
Bachelors Theses and Reports, 1928 - 1970
A problem of metallurgy during the last part of the Nineteenth and the early Twentieth Century, and one that stood very near the front, was investigations of methods to produce a non-corrosive surface on iron and steel without affecting the physical properties of these base metals.
Aluminum - Bronze Compacts And Their Possible Use As A Bearing Material, Donald J. Mcmaster
Aluminum - Bronze Compacts And Their Possible Use As A Bearing Material, Donald J. Mcmaster
Bachelors Theses and Reports, 1928 - 1970
In the modern aspect of powder metallurgy, the first use of a sintering process was in making filaments for incandescent electric lamps.In the short while from the day of Edison to the present, the science of working with metal powders has advanced by leaps and bounds.
A Study Of The Transformation Of A Twenty-Eight Per Cent Tin Bronze, Perry A. Boukind
A Study Of The Transformation Of A Twenty-Eight Per Cent Tin Bronze, Perry A. Boukind
Bachelors Theses and Reports, 1928 - 1970
In this investigation, attention is directed to the phases covered by a 28 per cent tin alloy. When the investigation was started, consideration was given to the possibility of making a Time - Temperature - Transformation curve for this particular alloy. As the work progressed and further research was carried on, this phase of the work was abandoned.
Caustic Leaching Of Montana Chromite, Chester Freshour
Caustic Leaching Of Montana Chromite, Chester Freshour
Bachelors Theses and Reports, 1928 - 1970
Chromite is the most important ore used for the production of chromium and chromium alloys. At present, the domestic production is insignificant as compared with the amount of chromite consumed in the United States.