Latest content added for UNT Digital Library Partner: UNT Libraries Government Documents Departmenthttps://digital.library.unt.edu/explore/partners/UNTGD/browse/?fq=str_year:1942&fq=untl_decade:1940-19492021-08-10T07:40:34-05:00UNT LibrariesThis is a custom feed for browsing UNT Digital Library Partner: UNT Libraries Government Documents DepartmentPoisoning and Production in a Power Plant2021-08-10T07:40:34-05:00https://digital.library.unt.edu/ark:/67531/metadc1256456/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1256456/"><img alt="Poisoning and Production in a Power Plant" title="Poisoning and Production in a Power Plant" src="https://digital.library.unt.edu/ark:/67531/metadc1256456/small/"/></a></p><p>The yield of 49, the efficiency of production of 49, and poisoning in a power plant are discussed. Only the crudest of estimates of the poisoning are possible: these indicated that production will probably not be hampered by poisoning. In this case the yield of 49 could be as high as 3 kg/ton but only about 2 kg/ton is compatible with a fairly high efficiency. In the case that production is stopped by poisoning, smaller yields, proportional to the tolerable loss in k, are obtained. In this case the yield will be improved by a factor of 2 or 3 if only the most poisoned parts are extracted and replaced by new uranium.</p>Examples for Pressure Drop Calculations in Parallel Flow Helium Cooling2021-08-10T07:40:28-05:00https://digital.library.unt.edu/ark:/67531/metadc1256455/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1256455/"><img alt="Examples for Pressure Drop Calculations in Parallel Flow Helium Cooling" title="Examples for Pressure Drop Calculations in Parallel Flow Helium Cooling" src="https://digital.library.unt.edu/ark:/67531/metadc1256455/small/"/></a></p><p>Pressure drop calculations are shown for He cooled power plants ranging from 400,000 kw to 30,000 kw.</p>Interaction of Be with Fission Neutrons2021-08-10T07:40:28-05:00https://digital.library.unt.edu/ark:/67531/metadc1256454/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1256454/"><img alt="Interaction of Be with Fission Neutrons" title="Interaction of Be with Fission Neutrons" src="https://digital.library.unt.edu/ark:/67531/metadc1256454/small/"/></a></p><p>To determine whether or not the (n,2n) reaction in Be would produce a net increase in fission neutrons in a power plant, the distribution of In resonance neutrons slowed down from fission energies in a graphite block was measured with and without a 2" of Be in front of a U3O8 slab undergoing fission. The thermal neutrons producing the fissions were obtained by slowing down neutrons from a cyclotron source. The observed distribution without Be was well represented by a Gaussian source range 36 cm. (corresponding to an initial fission energy of 3 MeV) and a similar sink of range 7.8 cm. The total In resonance intensity with Be was 5% less than without Be. On the assumption that the effect of the Be is entirely due to its different mean free path and moderating power, the In distribution with Be was calculated. Since the m.f.p. as a function of energy is not known for Be, two separate calculations were made using the highest (2.9 cm.) and the lowest (1.80 cm.) possible values for the effective Be m.f.p. Both calculated curves were found to be higher than the observed Be distribution, indicating that at least 10% of the fission neutrons are removed by the Be. Since there are uncertainties in the values of the constants used, the present conclusions are not entirely unambiguous. Improvement in the experimental techniques to remove these uncertainties are suggested.</p>Effect of Temperature on the Surface of Cast Uranium Metal2021-08-10T07:37:34-05:00https://digital.library.unt.edu/ark:/67531/metadc1256352/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1256352/"><img alt="Effect of Temperature on the Surface of Cast Uranium Metal" title="Effect of Temperature on the Surface of Cast Uranium Metal" src="https://digital.library.unt.edu/ark:/67531/metadc1256352/small/"/></a></p><p>Technical report. Photomicrographs showing the effect of heating polished uranium surface at 600, 700, 850, and 1000 degrees C, and sandblasted and cut surface at 1000 degrees C are included.</p>The Extraction Method of Purification of Uranyl Nitrate2021-08-10T07:37:25-05:00https://digital.library.unt.edu/ark:/67531/metadc1256351/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1256351/"><img alt="The Extraction Method of Purification of Uranyl Nitrate" title="The Extraction Method of Purification of Uranyl Nitrate" src="https://digital.library.unt.edu/ark:/67531/metadc1256351/small/"/></a></p><p>Technical report. Three extractions of a diethyl ether solution of uranyl nitrate with small portions of water are effective in removing rare earths, as is shown by radio-gadolinium and radio-europium tracer experiments. A study of representative ethers, alcohols, ketones, and esters showed that diethyl ether and a mixture of 85% ethyl methyl ketone with 15% xylene are the best solvents for the extraction.</p>Table IV - Estimated Reserves of Vanadium-Bearing Rock In Areas of Extraction2021-04-24T15:30:31-05:00https://digital.library.unt.edu/ark:/67531/metadc1783053/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1783053/"><img alt="Table IV - Estimated Reserves of Vanadium-Bearing Rock In Areas of Extraction" title="Table IV - Estimated Reserves of Vanadium-Bearing Rock In Areas of Extraction" src="https://digital.library.unt.edu/ark:/67531/metadc1783053/small/"/></a></p><p>Table showing the estimated reserves of vanadium-bearing rock in the Paris-Bloomington, Montpelier, Sublette Ridge, Swift Creek, and Strawberry Creek - Greys River Divide extraction areas in west-central Wyoming and southeastern Idaho. Indicated tonnage and inferred tonnage values are given for each area in millions of tons, along with the percentage of vanadium ore rock, maximum and minimum thickness, and average thickness of the rock in the extraction area.</p>[Plates I-X]2021-04-24T15:30:29-05:00https://digital.library.unt.edu/ark:/67531/metadc1783052/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1783052/"><img alt="[Plates I-X]" title="[Plates I-X]" src="https://digital.library.unt.edu/ark:/67531/metadc1783052/small/"/></a></p><p>Illustrations accompanying a report investigating the locations of vanadium-bearing phosphatic shale in West-Central Wyoming and Southeastern Idaho. The set includes seven maps (Plates I and V-X) showing the location of rock formations in the area and three charts (Plates II-IV) showing the correlation between the occurrence of vanadium deposits and the thin persistent beds of phosphate rock, oolite, siltstone, dolomite, and limestone with which they are interbedded.</p>Vanadium-Bearing Phosphatic Shale in West-Central Wyoming and Southeastern Idaho2020-04-01T20:01:27-05:00https://digital.library.unt.edu/ark:/67531/metadc1393132/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1393132/"><img alt="Vanadium-Bearing Phosphatic Shale in West-Central Wyoming and Southeastern Idaho" title="Vanadium-Bearing Phosphatic Shale in West-Central Wyoming and Southeastern Idaho" src="https://digital.library.unt.edu/ark:/67531/metadc1393132/small/"/></a></p><p>Discussing Vanadium-bearing phosphatic shale produced in West-central Wyoming and Southeastern Idaho</p>The Preparation of Tungsten Hexafluoride2019-08-27T15:53:11-05:00https://digital.library.unt.edu/ark:/67531/metadc1201802/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1201802/"><img alt="The Preparation of Tungsten Hexafluoride" title="The Preparation of Tungsten Hexafluoride" src="https://digital.library.unt.edu/ark:/67531/metadc1201802/small/"/></a></p><p>From introductory paragraph: "Because of the possibility that tungsten hexafluoride might occur as an impurity in uranium hexafluoride it seemed worthwhile to prepare some of the material in order to become familiar with its mode of preparation, reactions, etc."</p>Report on Determination of Densities of Several Uranium Compounds2019-08-27T15:53:11-05:00https://digital.library.unt.edu/ark:/67531/metadc1201810/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1201810/"><img alt="Report on Determination of Densities of Several Uranium Compounds" title="Report on Determination of Densities of Several Uranium Compounds" src="https://digital.library.unt.edu/ark:/67531/metadc1201810/small/"/></a></p><p>This technical report details a process in order to determine the densities of several uranium compounds.</p>Measurement of Density of Liquid UF62019-08-27T15:53:11-05:00https://digital.library.unt.edu/ark:/67531/metadc1201781/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1201781/"><img alt="Measurement of Density of Liquid UF6" title="Measurement of Density of Liquid UF6" src="https://digital.library.unt.edu/ark:/67531/metadc1201781/small/"/></a></p><p>This report describes a method and apparatus used to determine the density of liquid sodium hexafluoride. The report includes a drawing of the density cell used in the experiment.</p>On Certain Phase Equilibria in the Ternary System Uranyl Nitrate--Ether--Water at 25° and at 1°C2018-02-12T07:42:45-06:00https://digital.library.unt.edu/ark:/67531/metadc173127/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc173127/"><img alt="On Certain Phase Equilibria in the Ternary System Uranyl Nitrate--Ether--Water at 25° and at 1°C" title="On Certain Phase Equilibria in the Ternary System Uranyl Nitrate--Ether--Water at 25° and at 1°C" src="https://digital.library.unt.edu/ark:/67531/metadc173127/small/"/></a></p><p>This report follows a study that deals with a portion of the ternary diagram previously analyzed, namely the boundary curves which separate the central area of two coexistent liquid phases from the two border stripe representing one-phase liquid systems.</p>Radiation Problems of the Chemical Plant2018-02-12T07:42:45-06:00https://digital.library.unt.edu/ark:/67531/metadc172583/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc172583/"><img alt="Radiation Problems of the Chemical Plant" title="Radiation Problems of the Chemical Plant" src="https://digital.library.unt.edu/ark:/67531/metadc172583/small/"/></a></p><p>"Absorption measurements have been made in a large body of water to evaluate the contribution to the radiation intensity produced by the degradation of radiation without absorption. Radiation intensities three times those expected from a simple exponential absorption were found. Scattering from the air of gamma radiation has been measured and has been found to agree satisfactorily with theoretical predictions. The penetration of radiation through curved pipes in shielding has been measured and been found to be a flat topped function. A 2" pipe bent in the arc of a circle of 7' chord and a 10' radius gives a reduction intensity over the intensity in air at the same distance of 2.5X10⁴."</p>Capture Cross Section of Si for Thermal Neutrons2018-02-12T07:42:45-06:00https://digital.library.unt.edu/ark:/67531/metadc172696/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc172696/"><img alt="Capture Cross Section of Si for Thermal Neutrons" title="Capture Cross Section of Si for Thermal Neutrons" src="https://digital.library.unt.edu/ark:/67531/metadc172696/small/"/></a></p><p>The following report analyzes different values and measurements that give the same results for the captured cross section of thermal neutrons for Si.</p>The Use of Sodium Diethyl Dithiocarbamate as a Reagent for the Determination of T2018-02-12T07:42:45-06:00https://digital.library.unt.edu/ark:/67531/metadc172999/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc172999/"><img alt="The Use of Sodium Diethyl Dithiocarbamate as a Reagent for the Determination of T" title="The Use of Sodium Diethyl Dithiocarbamate as a Reagent for the Determination of T" src="https://digital.library.unt.edu/ark:/67531/metadc172999/small/"/></a></p><p>This report investigates the use of sodium diethyl dithiocarbonate as a reagent for the determination of T.</p>An Attempted Separation of Mercury Isotopes2018-02-12T07:42:45-06:00https://digital.library.unt.edu/ark:/67531/metadc172840/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc172840/"><img alt="An Attempted Separation of Mercury Isotopes" title="An Attempted Separation of Mercury Isotopes" src="https://digital.library.unt.edu/ark:/67531/metadc172840/small/"/></a></p><p>The following document describes the analysis on an attempt at separating mercury isotopes by making their environments as widely different as possible.</p>Muscovite in the Spruce Pine District, North Carolina2017-11-11T09:07:32-06:00https://digital.library.unt.edu/ark:/67531/metadc1039118/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1039118/"><img alt="Muscovite in the Spruce Pine District, North Carolina" title="Muscovite in the Spruce Pine District, North Carolina" src="https://digital.library.unt.edu/ark:/67531/metadc1039118/small/"/></a></p><p>From Abstract: "This report describes the occurrence of the mica and its physical properties among which is an unusually wide range of colors. A table is presented showing the results of power-factor measurements made by the National Bureau of Standards on 196 samples of sheet mica from 109 mica mines and 15 feldspar mines.It is concluded that more systematic planning of mica mining, for the district as a whole. would result in an average yearly production of at least 90,000 pounds of relatively clear sheet and possibly much more."</p>Manganese Deposits of Cedar Creek Valley, Frederick and Shenandoah Counties, Virginia2017-11-11T09:07:32-06:00https://digital.library.unt.edu/ark:/67531/metadc304374/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc304374/"><img alt="Manganese Deposits of Cedar Creek Valley, Frederick and Shenandoah Counties, Virginia" title="Manganese Deposits of Cedar Creek Valley, Frederick and Shenandoah Counties, Virginia" src="https://digital.library.unt.edu/ark:/67531/metadc304374/small/"/></a></p><p>From abstract: The Cedar Creek manganese mining district is in the southwestern part of Frederick County and the northwestern part of Shenandoah County, Virginia. The manganese ore consists chiefly of the oxides pyrolusite and psilomelane, and forms replacement pockets and fracture fillings in the Oriskany sandstone and in residual sandy clay and chert derived from the New Scotland limestone. Both these formations are of Devonian age, and both form low ridges. The minable bodies have been deposited by ground water in the zone of weathering, and most of them lie above present ground-water level. The manganese-bearing formations, together with the older and younger formations exposed in Cedar Creek Valley, have been compressed into numerous folds, and at the southwestern end of the district one of these folds passes into a normal fault with a displacement of 1,000 feet or more.</p>Tungsten Deposits of the Nightingale District, Pershing County, Nevada2017-11-11T09:07:32-06:00https://digital.library.unt.edu/ark:/67531/metadc304371/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc304371/"><img alt="Tungsten Deposits of the Nightingale District, Pershing County, Nevada" title="Tungsten Deposits of the Nightingale District, Pershing County, Nevada" src="https://digital.library.unt.edu/ark:/67531/metadc304371/small/"/></a></p><p>Abstract: The tungsten deposits of the Nightingale district are just within the western border of Pershing County, Nev., and in the Nightingale or Truckee Range, which lies east of Winnemucca Lake. The Tertiary volcanic rocks of the district rest unconformably upon intrusive granodiorite and steeply dipping metamorphosed limestones and slates of unknown age. The tungsten deposits are of the contact-metamorphic type: The ore consists of scheelite bearing tactite, a dark silicate rock that was formed by metamorphism of limestone at the granodiorite contact. Scheelite (calcium tungstate) is the only valuable mineral. The gangue minerals are epidote, quartz, pyroxene, garnet, calcite, tremolite, molybdenite, pyrite, pyrrhotite, chalcopyrite, arsenopyrite, apatite, and sphene. The bodies of tactite are generally tabular, and they extend downward steeply, because both the limestones and the granodiorite contact dip vertically or nearly so. The largest tactite body of the district is at the Nightingale mine; it attains a maximum thickness of 60 feet and is nearly a thousand feet long, but only for part of its length is it thick enough and rich enough to be potentially minable. That it continues downward below the mine workings, which extend to a depth of 128 feet, is shown by nine drill holes put down by the Bureau of Mines, United States Department of the Interior, in 1940, all of which encountered tactite at depths of, 260 to 350 feet. The mine has produced about 12,000 tons of ore, and its ore bodies contain the principal reserve of the district. In 1938 the reserves of the entire district were estimated to be about 50,000 tons of ore averaging between 0.25 and 0.50 percent of W03. Later diamond drilling by the Bureau of Mines indicated that the principal tactite body continues to at least twice the depth hitherto explored by the mine workings.</p>Topaz Deposits Near the Brewer Mine, Chesterfield County, South Carolina2017-11-11T09:07:32-06:00https://digital.library.unt.edu/ark:/67531/metadc304372/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc304372/"><img alt="Topaz Deposits Near the Brewer Mine, Chesterfield County, South Carolina" title="Topaz Deposits Near the Brewer Mine, Chesterfield County, South Carolina" src="https://digital.library.unt.edu/ark:/67531/metadc304372/small/"/></a></p><p>From introduction: Lode and placer deposits of massive topaz rock were discovered near the old Brewer gold mine in northwestern Chesterfield County, S. C., in 1935. Preliminary tests have shown that this rock can be used in the manufacture of refractory ware and as a source of mullite, thus augmenting supplies of kyanite that have been coming from India.</p>Chromite and quicksilver deposits of the Del Puerto area, Stanislaus County, California2017-11-11T09:07:32-06:00https://digital.library.unt.edu/ark:/67531/metadc304373/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc304373/"><img alt="Chromite and quicksilver deposits of the Del Puerto area, Stanislaus County, California" title="Chromite and quicksilver deposits of the Del Puerto area, Stanislaus County, California" src="https://digital.library.unt.edu/ark:/67531/metadc304373/small/"/></a></p><p>From Introduction: "The present report is based on 10 weeks of field work from mid-November 1940 until late January 1941, and 4 days in May 1941. An area of 5 1/2 square miles in and about Del Puerto Canyon was mapped on a scale of 600 feet to 1 inch, and two small areas in the vicinity of the Adobe Canyon and Black Bart chromite mines were mapped on a scale of 200 feet to 1 inch."</p>Nickel Deposits of Bohemia Basin and Vicinity, Yakobi Island, Alaska2017-11-11T09:07:32-06:00https://digital.library.unt.edu/ark:/67531/metadc1039108/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1039108/"><img alt="Nickel Deposits of Bohemia Basin and Vicinity, Yakobi Island, Alaska" title="Nickel Deposits of Bohemia Basin and Vicinity, Yakobi Island, Alaska" src="https://digital.library.unt.edu/ark:/67531/metadc1039108/small/"/></a></p><p>From Introduction: "According to present knowledge, the deposits center principally, in three areas: Bonemia Basin on Yakobi Island, Mirror Harbor on Chicagof Island, and Snipe Bay on Baranof Island. This report deals only with the deposits of the most northerly area, in and near Bohemia Basin."</p>Nickel Deposit Near Riddle, Douglas County, Oregon2017-11-11T09:07:32-06:00https://digital.library.unt.edu/ark:/67531/metadc1039110/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1039110/"><img alt="Nickel Deposit Near Riddle, Douglas County, Oregon" title="Nickel Deposit Near Riddle, Douglas County, Oregon" src="https://digital.library.unt.edu/ark:/67531/metadc1039110/small/"/></a></p><p>From Introduction: "The Riddle nickel deposit is on Nickel Mountain, also called Piney Mountain, about 5 miles northwest of Riddle, Douglas Country, Oreg. (fig. 20). The deposit is an unevenly distributed surficial blanket, containing the nickel silicate garnierite, which rests upon peridotitic rocks on the western, southern, and southeastern slopes of the mountain above an elevation of 2,000 feet. It is on the Southern Pacific Railroad, and it is about 230 miles by highway south of Portland. A poorly conditioned dirt road about 5 miles long connects the town with the nickel deposit."</p>Quicksilver Deposits in the Steens and Pueblo Mountains, Southern Oregon2017-11-11T09:07:32-06:00https://digital.library.unt.edu/ark:/67531/metadc1039111/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1039111/"><img alt="Quicksilver Deposits in the Steens and Pueblo Mountains, Southern Oregon" title="Quicksilver Deposits in the Steens and Pueblo Mountains, Southern Oregon" src="https://digital.library.unt.edu/ark:/67531/metadc1039111/small/"/></a></p><p>From Scope of Report: "During the summer of 1940, 34 days were spent in a preliminary study of the quicksilver deposits in the Steens and Pueblo Mountains. Nearly all of the quicksilver prospects were examined and mapped, and the general geology of the east flank of the mountains from north of Andrews to Denio was reconnoitered."</p>Chromite deposits of Kenai Peninsula, Alaska2017-11-11T09:07:32-06:00https://digital.library.unt.edu/ark:/67531/metadc1039112/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1039112/"><img alt="Chromite deposits of Kenai Peninsula, Alaska" title="Chromite deposits of Kenai Peninsula, Alaska" src="https://digital.library.unt.edu/ark:/67531/metadc1039112/small/"/></a></p><p>This report describes field work and research done in two areas of ultramafic rocks containing chromite deposits are known at the south end of Kenai Peninsula, Alaska. The Red Mountain is the other area covered in this report.</p>Tin and Tungsten Deposits at Silver Hill, Spokane County, Washington2017-11-11T09:07:32-06:00https://digital.library.unt.edu/ark:/67531/metadc1039114/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1039114/"><img alt="Tin and Tungsten Deposits at Silver Hill, Spokane County, Washington" title="Tin and Tungsten Deposits at Silver Hill, Spokane County, Washington" src="https://digital.library.unt.edu/ark:/67531/metadc1039114/small/"/></a></p><p>From abstract: Tin and tungsten minerals occur in pegmatites and quartz veins at Silver Hill, in secs. 23 and 24, T. 24 N., R. 43 E., 11 miles southeast of Spokane, Wash.</p>Manganese Deposits in the Paymaster Mining District, Imperial County, California2017-10-25T14:26:56-05:00https://digital.library.unt.edu/ark:/67531/metadc304209/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc304209/"><img alt="Manganese Deposits in the Paymaster Mining District, Imperial County, California" title="Manganese Deposits in the Paymaster Mining District, Imperial County, California" src="https://digital.library.unt.edu/ark:/67531/metadc304209/small/"/></a></p><p>Abstract: The manganese deposits of the Paymaster district, in Imperial County, Calif., extend along steeply inclined normal fault fissures which cut Tertiary (?) volcanic breccia and fanglomerate. The ore deposits are in part open-space fillings composed largely of psilomelane, and in part fault breccia replaced by psilomelane, pyrolusite, and manganite. Calcite and rock fragments are the chief impurities. High-grade ore now exposed averages about 40 percent manganese, and contains much barium. About 3,000 tons of ore averaging 42 percent manganese was produced from the district by hand-sorting in 1917-18. It is estimated that nearly the same amount could be produced again, largely from present workings. In addition, a few tens of thousands of tons of milling ore, estimated to contain between 10 and 30 percent of manganese, are believed to exist in veins one to three feet wide within one or two hundred feet of the surface.</p>Subsurface Geology and Oil and Gas Resources of Osage County, Oklahoma: Part 10. Burbank and South Burbank Oil Fields Townships 26 and 27 North, Range 5 East, and Townships 25 to 27 North, Range 6 East2017-10-25T14:26:56-05:00https://digital.library.unt.edu/ark:/67531/metadc1036533/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1036533/"><img alt="Subsurface Geology and Oil and Gas Resources of Osage County, Oklahoma: Part 10. Burbank and South Burbank Oil Fields Townships 26 and 27 North, Range 5 East, and Townships 25 to 27 North, Range 6 East" title="Subsurface Geology and Oil and Gas Resources of Osage County, Oklahoma: Part 10. Burbank and South Burbank Oil Fields Townships 26 and 27 North, Range 5 East, and Townships 25 to 27 North, Range 6 East" src="https://digital.library.unt.edu/ark:/67531/metadc1036533/small/"/></a></p><p>This report is part of a series describing the structural features, the character of the oil- and gas-producing beds, and the localities where additional oil and gas may be found in parts of Osage County, Oklahoma. This part discusses the geology and resources of the Burbank and South Burbank oil fields, in the northwestern part of Osage County and the eastern part of Kay County.</p>Nickel Deposit Near Gold Hill, Boulder County, Colorado2017-10-25T14:26:56-05:00https://digital.library.unt.edu/ark:/67531/metadc1036534/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1036534/"><img alt="Nickel Deposit Near Gold Hill, Boulder County, Colorado" title="Nickel Deposit Near Gold Hill, Boulder County, Colorado" src="https://digital.library.unt.edu/ark:/67531/metadc1036534/small/"/></a></p><p>From Introduction: "Scattered throughout the Colorado Front Range, there are many small copper deposits, believed to be of pre-Cambrian age. The have been widely prospected but have produced little or no ore. In one of these, the Copper King mine, near Gold Hill, Colo., nickel was discovered in 1930, and development in the following years has exposed some 25,000 tons of ore containing from 2 to 3 percent of nickel. No other nickel deposit is known in the Front Range, but a somewhat similar deposit has been opened in Gem mine, near Canon City and about 120 miles south of Gold Hill."</p>Quicksilver and Antimony Deposits of the Stayton District, California2017-10-25T14:26:56-05:00https://digital.library.unt.edu/ark:/67531/metadc1036539/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1036539/"><img alt="Quicksilver and Antimony Deposits of the Stayton District, California" title="Quicksilver and Antimony Deposits of the Stayton District, California" src="https://digital.library.unt.edu/ark:/67531/metadc1036539/small/"/></a></p><p>This report discusses geologic work conducted in the Strayton district, California on the deposits of quicksilver and antimony.</p>Manganese Deposits in the Nevada District, White Pine County, Nevada2017-10-25T14:26:56-05:00https://digital.library.unt.edu/ark:/67531/metadc1036542/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1036542/"><img alt="Manganese Deposits in the Nevada District, White Pine County, Nevada" title="Manganese Deposits in the Nevada District, White Pine County, Nevada" src="https://digital.library.unt.edu/ark:/67531/metadc1036542/small/"/></a></p><p>Report describing the characteristics of manganese deposits found in White Pine County, Nevada, and geographic information about the surrounding area.</p>Stratigraphy, Structure, and Mineralization in the Beaver-Tarryall Area, Park County, Colorado: A Reconnaissance Report2017-10-25T14:26:56-05:00https://digital.library.unt.edu/ark:/67531/metadc1036531/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1036531/"><img alt="Stratigraphy, Structure, and Mineralization in the Beaver-Tarryall Area, Park County, Colorado: A Reconnaissance Report" title="Stratigraphy, Structure, and Mineralization in the Beaver-Tarryall Area, Park County, Colorado: A Reconnaissance Report" src="https://digital.library.unt.edu/ark:/67531/metadc1036531/small/"/></a></p><p>From Introduction: "The recent large increase in gold production from the Alma district has greatly stimulated interest in territory immediately to the east, where many small gold-bearing veins have been discovered. Consequently, as a cooperative project of the United States Geological Survey and the State of Colorado, 7 weeks in 1938 were devoted to renaissance work to determine the origin of the placer gold and the possibilities for discovering valuable lode deposits either near the surface or at depth."</p>Tertiary Deposits of the Eagle-Circle District, Alaska2017-10-25T14:26:56-05:00https://digital.library.unt.edu/ark:/67531/metadc1036514/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1036514/"><img alt="Tertiary Deposits of the Eagle-Circle District, Alaska" title="Tertiary Deposits of the Eagle-Circle District, Alaska" src="https://digital.library.unt.edu/ark:/67531/metadc1036514/small/"/></a></p><p>From introduction: The present report aims to supply additional information regarding the Tertiary deposits, which are the source of most of the gold placers now being worked in that part of the Eagle-Circle district lying south of the Yukon River. The work was conducted from base camps along the river, but the belt of Tertiary rocks is at places as much as 20 miles from the Yukon, so that it is not easily accessible from the river except in the vicinity of mining camps, where roads or trails have been constructed southward.</p>The Wild Horse Quicksilver District Lander County, Nevada2017-10-25T14:26:56-05:00https://digital.library.unt.edu/ark:/67531/metadc1036518/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1036518/"><img alt="The Wild Horse Quicksilver District Lander County, Nevada" title="The Wild Horse Quicksilver District Lander County, Nevada" src="https://digital.library.unt.edu/ark:/67531/metadc1036518/small/"/></a></p><p>Abstract: The presence of cinnabar in the Wild Horse district, in western Lander County, Nev., has been known since about 1916, but little ore was produced until 1940. In that year and early in 1941, deposits discovered in 1939 were mined to apparent exhaustion by the Wild Horse Quicksilver Mining Co., which had produced 827 flasks at the end of April 1941. The district is underlain by moderately deformed sandstone, shale, and limestone of Lower and Middle Triassic age, locally covered by remnants of a mantle of Tertiary fanglomerate, tuff, and lava. The Triassic rocks are partly silicified, and cinnabar has been found in and near silicified rock, particularly the silicified limestone at the base of -the Middle Triassic. The ore bodies so far discovered were individually small and ill-defined, and had an average tenor of less than 0.5 percent of quicksilver. Other similar ore bodies are to be expected at moderate depths, but the cost of exploration for them may, perhaps, prove excessive.</p>Manganese Resources of the Olympic Peninsula, Washington: a Preliminary Report2017-10-25T14:26:56-05:00https://digital.library.unt.edu/ark:/67531/metadc1036519/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1036519/"><img alt="Manganese Resources of the Olympic Peninsula, Washington: a Preliminary Report" title="Manganese Resources of the Olympic Peninsula, Washington: a Preliminary Report" src="https://digital.library.unt.edu/ark:/67531/metadc1036519/small/"/></a></p><p>Abstract: The northern, eastern, and southern parts of the Olympic Peninsula, Wash., contain many small deposits of manganese. Most of the deposits consist of complex manganese silicates with some carbonates, although 16,275 tons of hausmannite (Mn304) ore was mined at the Crescent mine during 1924-26. About a hundred tons of silicates have been mined from various properties, mainly for experimental purposes. Future production probably will not be large, because the silicate ores are of low grade and are difficult and expensive to treat. Moreover, most of the deposits are difficult of access, and most of the ore bodies are small isolated lenses and thin tabular bodies. The deposits are mostly in red limestone or red argillite near contacts with basalt, but a few of them are in basalt.</p>Geology of the Gerstle River District, Alaska, with a Report on the Black Rapids Glacier2017-10-25T14:26:56-05:00https://digital.library.unt.edu/ark:/67531/metadc1036522/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1036522/"><img alt="Geology of the Gerstle River District, Alaska, with a Report on the Black Rapids Glacier" title="Geology of the Gerstle River District, Alaska, with a Report on the Black Rapids Glacier" src="https://digital.library.unt.edu/ark:/67531/metadc1036522/small/"/></a></p><p>From abstract: The area here described includes most of the north side of the Alaska Range between the Delta and Johnson Rivers, in one direction, and the axis of the Alaska Range and the Tanana River in the other. Besides the Delta River, its principal streams are Jarvis Creek, the Gerstle and Little Gerstle Rivers, and, at the extreme east, the Johnson River, all of which have glacial sources.</p>Quicksilver Deposits of the Opalite District, Malheur County, Oregon and Humboldt County, Nevada2017-10-25T14:26:56-05:00https://digital.library.unt.edu/ark:/67531/metadc1036540/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1036540/"><img alt="Quicksilver Deposits of the Opalite District, Malheur County, Oregon and Humboldt County, Nevada" title="Quicksilver Deposits of the Opalite District, Malheur County, Oregon and Humboldt County, Nevada" src="https://digital.library.unt.edu/ark:/67531/metadc1036540/small/"/></a></p><p>From Introduction: "The Opalite quicksilver district includes two deposits with a considerable past production, one deposit with a small production, and one unproved prospect. These deposits are located along the circumference of a semicircular area that extends from a short distance west of McDermitt, Nev., for about 20 miles along the Oregon-Nevada State boundary. (See fig. 34). The area thus includes parts of Humboldt County, Nev., and Malheur County, Oreg.; almost the entire production has been derived from the portion in Oregon."</p>Tin Deposit at Majuba Hill Pershing County, Nevada2017-10-25T14:26:56-05:00https://digital.library.unt.edu/ark:/67531/metadc1036526/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1036526/"><img alt="Tin Deposit at Majuba Hill Pershing County, Nevada" title="Tin Deposit at Majuba Hill Pershing County, Nevada" src="https://digital.library.unt.edu/ark:/67531/metadc1036526/small/"/></a></p><p>Abstract: The tin and copper deposits at Majuba Hill, Pershing County, Nevada are in a partly brecciated plug of Tertiary rhyolite porphyry, which is altered nearly everywhere to quartz and sericite and in some places is intensely tourmalinized. The tin mineral, cassiterite, appears to be associated with the alteration, for the single concentration of it was formed by replacement of altered breccia. Brecciated and altered rock is, however, only a general guide to potentially tin-bearing ground, and not a specific guide to ore shoots, for most of such rock appears to contain only small amounts of cassiterite, widely and unevenly distributed. The known deposit, which is exposed only underground, is at most 20 by 20 by 10 feet in size, and may contain about 12,000 pounds of metallic tin. The deposit is cut off by a normal fault, which apparently is of small displacement, and the footwall segment has not been found. The copper deposit is in the same normal fault, about 300 feet south of the earlier-formed tin deposit. From it about 4,000 tons of 12 percent copper ore was mined in 1915-18, but none has been mined since and no copper ore is now in sight.</p>Purification of Uranium Oxide2017-10-15T22:09:52-05:00https://digital.library.unt.edu/ark:/67531/metadc1019259/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1019259/"><img alt="Purification of Uranium Oxide" title="Purification of Uranium Oxide" src="https://digital.library.unt.edu/ark:/67531/metadc1019259/small/"/></a></p><p>None</p>Progress Report on Contract OEMsr-290. Supplement 22017-10-15T22:09:52-05:00https://digital.library.unt.edu/ark:/67531/metadc1024479/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1024479/"><img alt="Progress Report on Contract OEMsr-290. Supplement 2" title="Progress Report on Contract OEMsr-290. Supplement 2" src="https://digital.library.unt.edu/ark:/67531/metadc1024479/small/"/></a></p><p>None</p>Search for Elements 94 and 93 in Nature. Presence of 94$sup 239$ in Pitchblende2017-10-15T22:09:52-05:00https://digital.library.unt.edu/ark:/67531/metadc1020307/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1020307/"><img alt="Search for Elements 94 and 93 in Nature. Presence of 94$sup 239$ in Pitchblende" title="Search for Elements 94 and 93 in Nature. Presence of 94$sup 239$ in Pitchblende" src="https://digital.library.unt.edu/ark:/67531/metadc1020307/small/"/></a></p><p>None</p>Formation of the 50-Year Element 94 from Deuteron Bombardment of U$sup 23$$sup 8$2017-10-15T22:09:52-05:00https://digital.library.unt.edu/ark:/67531/metadc1020002/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1020002/"><img alt="Formation of the 50-Year Element 94 from Deuteron Bombardment of U$sup 23$$sup 8$" title="Formation of the 50-Year Element 94 from Deuteron Bombardment of U$sup 23$$sup 8$" src="https://digital.library.unt.edu/ark:/67531/metadc1020002/small/"/></a></p><p>None</p>[Study of Factors Which Influence the Rate of Reaction Between UO3 CCl4. Progress Report]2017-10-15T22:09:52-05:00https://digital.library.unt.edu/ark:/67531/metadc1017590/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1017590/"><img alt="[Study of Factors Which Influence the Rate of Reaction Between UO3 CCl4. Progress Report]" title="[Study of Factors Which Influence the Rate of Reaction Between UO3 CCl4. Progress Report]" src="https://digital.library.unt.edu/ark:/67531/metadc1017590/small/"/></a></p><p>None</p>Theory of High Frequency Rectification by Silicon Crystals2017-10-15T22:09:52-05:00https://digital.library.unt.edu/ark:/67531/metadc1020979/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1020979/"><img alt="Theory of High Frequency Rectification by Silicon Crystals" title="Theory of High Frequency Rectification by Silicon Crystals" src="https://digital.library.unt.edu/ark:/67531/metadc1020979/small/"/></a></p><p>The excellent performance of British ''red dot'' crystals is explained as due to the knife edge contact against a polished surface. High frequency rectification depends critically on the capacity of the rectifying boundary layer of the crystal. C. For high conversion efficiency, the product of this capacity and of the ''forward'' (bulk) resistance R{sub b} of the crystal must be small. For a knife edge, this product depends primarily on the breadth of the knife edge and very little upon its length. The contact can therefore have a rather large area which prevents burn-out. For a wavelength of 10 cm. the computations show that the breadth of the knife edge should be less than about 10{sup -3} cm. For a point contact the radius must be less than 1.5 x 10{sup -3} cm. and the resulting small area is conductive to burn-out. The effect of ''tapping'' is probably to reduce the area of contact.</p>Vanadium Deposits in the Carrizo Mountains District, Navajo Indian Reservation, Northeastern Arizona and Northwestern New Mexico2017-07-14T06:39:54-05:00https://digital.library.unt.edu/ark:/67531/metadc784394/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc784394/"><img alt="Vanadium Deposits in the Carrizo Mountains District, Navajo Indian Reservation, Northeastern Arizona and Northwestern New Mexico" title="Vanadium Deposits in the Carrizo Mountains District, Navajo Indian Reservation, Northeastern Arizona and Northwestern New Mexico" src="https://digital.library.unt.edu/ark:/67531/metadc784394/small/"/></a></p><p>From abstract: The Carrizo Mountains vanadium district is in the Navajo Indian Reservation, northeastern Arizona and northwestern New Mexico. From May through October, 1942, two mining companies, operating under lease agreements with the Navajo Service, opened several mines in the district and produced a total of about 6,000 tons of ore, averaging approximately 2.2 percent.</p>Quicksilver Deposits of the Parkfield District, California2017-03-15T12:42:30-05:00https://digital.library.unt.edu/ark:/67531/metadc304375/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc304375/"><img alt="Quicksilver Deposits of the Parkfield District, California" title="Quicksilver Deposits of the Parkfield District, California" src="https://digital.library.unt.edu/ark:/67531/metadc304375/small/"/></a></p><p>From abstract: The Parkfield district, one of the minor California quicksilver districts, lies on the southern end of the Diablo Range, in the southeastern part of Monterey County and the westernmost tip of Kings County. (...) Two geologically similar areas, separated by 10 miles of unmineralized rocks, have been mapped. These areas contain (1) sedimentary, volcanic, and metamorphic rocks belonging to the Franciscan formation, of probable Jurassic age, (2) sedimentary rocks of Cretaceous age, (3) a few outcrops of fossiliferous strata assigned to the Temblor formation, of middle Miocene age, (4) large masses of serpentine emplaced along fault zones in post-Miocene time, (5) lenses of silica-carbonate rock formed by the alteration of the serpentine, and (6) large areas of landslide.</p>Chromite Deposits of Red Bluff Bay and Vicinity, Baranof Island, Alaska2017-03-15T12:42:30-05:00https://digital.library.unt.edu/ark:/67531/metadc304376/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc304376/"><img alt="Chromite Deposits of Red Bluff Bay and Vicinity, Baranof Island, Alaska" title="Chromite Deposits of Red Bluff Bay and Vicinity, Baranof Island, Alaska" src="https://digital.library.unt.edu/ark:/67531/metadc304376/small/"/></a></p><p>From introduction: The Red Bluff Bay area was examined briefly for the Geological Survey by John C. Reed and others in 1939. During the summer of 1941 the writers, with R. E. L. Rutledge, mapped this area on a scale of 1:12,000, and examined the serpentine masses in the interior during the course of reconnaissance trips into the surrounding region.</p>Quicksilver Deposits Near the Little Missouri River, Pike County, Arkansas2017-03-15T12:42:30-05:00https://digital.library.unt.edu/ark:/67531/metadc304377/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc304377/"><img alt="Quicksilver Deposits Near the Little Missouri River, Pike County, Arkansas" title="Quicksilver Deposits Near the Little Missouri River, Pike County, Arkansas" src="https://digital.library.unt.edu/ark:/67531/metadc304377/small/"/></a></p><p>From introduction: In this study the Geological Survey and the Bureau of Mines, United States Department of the Interior, cooperated. The author prepared detailed geologic maps showing the surface topography, geology, and workings of 11 mines, and the underground workings and geology of 7 of these; the Bureau of Mines engineers directed diamond-drilling and.bulldozer-trenching. The locations of the detailed maps are shown on plate 23, an index map overprinted on a segment of the map made by Reed and Wells.</p>Occurrences of Molybdenum Minerals in Alaska2017-01-14T22:15:59-06:00https://digital.library.unt.edu/ark:/67531/metadc944625/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc944625/"><img alt="Occurrences of Molybdenum Minerals in Alaska" title="Occurrences of Molybdenum Minerals in Alaska" src="https://digital.library.unt.edu/ark:/67531/metadc944625/small/"/></a></p><p>Abstract: In the accompanying report reference is made to all of the deposits in Alaska in which molybdenum minerals have been definitely recognized and reported. None of the deposits have been mined commercially, and none of them have been prospected thoroughly enough to afford quantitative estimates as to their tenor and potential reserves ; in fact, at only a few of the localities has there been more than surficial testing. Forty-one separate and distinct localities where molybdenum minerals occur are listed, and the available information on factors of geologic significance regarding each occurrence is given. A small-scale map of Alaska on which the various localities are indicated forms part of the bulletin, and in the text are extensive references to the various published reports and records of the Survey upon which the statements are based. In spite of the widespread distribution of molybdenum mineralization in Alaska, the remoteness of many of the localities, their handicap through dearth of transportation facilities and labor supplies, and the already wellsupplied condition of the American market for molybdenum ores discourage the early development of any of the known deposits or search for them in unsurveyed areas. These draw-backs will doubtless become -less important factors as the settlement and development of Alaska as a whole takes place. It is, therefore, with a view to the future that one must consider these deposits, and from that standpoint it becomes evident that some of them merit watchful consideration.</p>Subsurface Geology and Oil and Gas Resources of Osage County, Oklahoma: Part 11. Summary of Subsurface Geology with Special Reference to Oil and Gas2017-01-14T22:15:59-06:00https://digital.library.unt.edu/ark:/67531/metadc944644/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc944644/"><img alt="Subsurface Geology and Oil and Gas Resources of Osage County, Oklahoma: Part 11. Summary of Subsurface Geology with Special Reference to Oil and Gas" title="Subsurface Geology and Oil and Gas Resources of Osage County, Oklahoma: Part 11. Summary of Subsurface Geology with Special Reference to Oil and Gas" src="https://digital.library.unt.edu/ark:/67531/metadc944644/small/"/></a></p><p>This report is part of a series describing the structural features, the character of the oil- and gas-producing beds, and the localities where additional oil and gas may be found in parts of Osage County, Oklahoma. This part provides an overview of the discussions in the previous 10 publications and provides a summary of relevant information.</p>