UNT Libraries Government Documents Department - 350 Matching Results
Results: 1 - 24 of 350 next
Results as a List of Thumbnails and Descriptive Information Results as a Grid of Images Print This Result Page Keep up to Date with an RSS feed of results matching your query.
Description: "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."
Date: December 12, 1942
Creator: Borst, Lyle B. & Wollan, Ernest Omar
Description: 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.
Date: October 22, 1942
Creator: Van Name, Ralph Gibbs
Description: The following document describes the analysis on an attempt at separating mercury isotopes by making their environments as widely different as possible.
Date: April 30, 1942
Creator: Kauzmann, Walter, 1916-
Description: This report investigates the use of sodium diethyl dithiocarbonate as a reagent for the determination of T.
Creator: Jones, A. G.
Description: 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.
Creator: Guild, Philip White
Description: 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."
Creator: Kesler, Thomas L. (Thomas Lingle), 1908-1997 & Olson, J. C. (Jerry Chipman), 1917-2013
Description: 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.
Creator: Smith, Ward C. & Guild, Philip White
Description: 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.
Creator: Fries, Carl, Jr.
Description: 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.
Creator: Monroe, Watson Hiner
Description: 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."
Creator: Hawkes, H. E., Jr.; Wells, Francis G. & Wheeler, D. P., Jr.
Description: 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."
Creator: Reed, John C. & Dorr, John Van N., Jr.
Description: 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.
Creator: Page, Lincoln R.
Description: 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."
Creator: Pecora, William T. & Hobbs, S. Warren
Description: 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."
Creator: Ross, Clyde P.
Stratigraphy, Structure, and Mineralization in the Beaver-Tarryall Area, Park County, Colorado: A Reconnaissance Report
Description: 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."
Creator: Singewald, Quentin D.
Description: This report discusses geologic work conducted in the Strayton district, California on the deposits of quicksilver and antimony.
Creator: Bailey, Edgar Herbert & Myers, W. Bradley
Description: 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.
Creator: Dane, Carle H. & Ross, Clyde P.
Description: 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.
Creator: Smith, Ward C. & Gianella, V. P.
Description: 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."
Creator: Yates, Robert G.
Description: 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."
Creator: Goddard, Edwin N. & Lovering, T. S.
Description: 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.
Creator: Mertie, John Beaver, Jr.
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
Description: 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.
Creator: Bass, N. Wood; Goodrich, Harold Beach & Dillard, W. R.
Description: Report describing the characteristics of manganese deposits found in White Pine County, Nevada, and geographic information about the surrounding area.
Creator: Roberts, Ralph Jackson
Filter: CollectionsThis dialog allows you to filter your current search. Each of the Collections listed note their name and the number of records that will be limited down to if you choose that option.
Filter: Serial/Series TitlesThis dialog allows you to filter your current search. Each of the Serial/Series Titles listed note their name and the number of records that will be limited down to if you choose that option. The list can be sorted by name or the count.
Having trouble finding an option within the list of Serial/Series Titles? Start typing and we'll update the list to show only those items that match your needs. Try limiting with other filters first or use this comprehensive list of titles as an alternative starting point.
NACA Wartime Reports 176 176 NACA Advanced Restricted Reports 92 92 NACA Technical Notes 40 40 United States Geological Survey Reports 39 39 NACA Technical Memorandums 38 38 U.S. Geological Survey bulletin 37 37 NACA Advanced Confidential Reports 32 32 NACA Memorandum Reports 31 31 Strategic minerals investigations 31 31 United States Bureau of Mines Reports 25 25 NACA Restricted Bulletins 18 18 NACA Special Reports 12 12 NACA Technical Reports 12 12 Report of investigations (United States. Bureau of Mines) 11 11 NACA Confidential Bulletins 9 9 Atomic Energy Commission Reports 6 6 Information circular (United States. Bureau of Mines) 4 4 Mineral resources of Alaska 3 3 Bulletin (United States. Bureau of Mines) 2 2 Coal-Mine Accidents in the United States 2 2 Manganese Investigations - Metallurgical Division 2 2 Stemming in Metal Mines 2 2 Subsurface Geology and Oil and Gas Resources of Osage County, Oklahoma 2 2 U.S. Geological Survey professional paper 2 2 Coast and Geodetic Survey Reports 1 1 Contributions to economic geology 1 1 Metal- and Nonmetal-Mine Accidents in the United States During the Calendar Year 1 1 NACA Annual Reports 1 1 Quarry Accidents in the United States During the Calendar Year 1 1 Report of the Nonmetals Division 1 1 Technical paper (United States. Bureau of Mines) 1 1 United States Earthquakes 1 1
Filter: U.S. StatesThis dialog allows you to filter your current search. Each of the U.S. States listed note their name and the number of records that will be limited down to if you choose that option. The list can be sorted by name or the count.
Having trouble finding an option within the list of U.S. States? Start typing and we'll update the list to show only those items that match your needs.
Alabama 2 2 Alaska 10 10 Arizona 2 2 Arkansas 1 1 California 7 7 Colorado 6 6 Idaho 2 2 Louisiana 1 1 Maryland 1 1 Minnesota 1 1 Montana 2 2 Nevada 10 10 New Hampshire 1 1 New Mexico 2 2 North Carolina 2 2 Oklahoma 2 2 Oregon 3 3 Pennsylvania 1 1 South Carolina 2 2 Tennessee 1 1 Texas 1 1 Utah 2 2 Virginia 2 2 Washington 5 5 West Virginia 1 1
Filter: CountiesThis dialog allows you to filter your current search. Each of the Counties listed note their name and the number of records that will be limited down to if you choose that option. The list can be sorted by name or the count.
Having trouble finding an option within the list of Counties? Start typing and we'll update the list to show only those items that match your needs.
Adams County, CO 1 1 Anderson County, TN 1 1 Avery County, NC 1 1 Boulder County, CO 2 2 Brooke County, WV 1 1 Chesterfield County, SC 1 1 Clark County, NV 1 1 Denver County, CO 1 1 Douglas County, OR 1 1 Frederick County, VA 1 1 Gunnison County, CO 1 1 Harrison County, WV 1 1 Humboldt County, NV 1 1 Imperial County, CA 1 1 Kay County, OK 1 1 King County, WA 1 1 Lander County, NV 2 2 Malheur County, OR 1 1 McDowell County, WV 1 1 Mitchell County, NC 1 1 Monongalia County, WV 1 1 Osage County, OK 2 2 Park County, CO 1 1 Pershing County, NV 2 2 Pike County, AR 1 1 Preston County, WV 1 1 Shenandoah County, VA 1 1 Spokane County, WA 1 1 Stanislaus County, CA 1 1 Tuscaloosa County, AL 1 1 Weld County, CO 1 1 Wetzel County, WV 1 1 White Pine County, NV 1 1