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Mineral Industries Survey of the United States: California, Calaveras County, Mother Lode District (South). Mines of the Southern Mother Lode Region. Part 1 -- Calaveras County

Description: From Introduction: "The present paper discusses regional resources, chiefly of gold, the existence of which has long been demonstrated by substantial production but which are so nearly marginal in value that their mining has been protracted and will probably continue indefinitely for many decades."
Date: 1938
Creator: Julihn, C. E. & Horton, F. W.
Partner: UNT Libraries Government Documents Department

Past Placer-Gold Production from Alaska

Description: "To the end of 1930 Alaska, according to the records of the Geological Survey, had produced placer gold to the value of $258,962,000 from mines widely scattered throughout its length and breadth. The distribution of the placers from which the gold was recovered has been stated in more or less detail in the annual summaries published by the Geological Survey on the mineral industry of Alaska and also in its more complete reports on many of the individual mining districts. Although these summaries and reports have furnished information regarding the larger regions, they have not always given specific details regarding the smaller districts. Furthermore, there has been no recent attempt to assemble and publish in one place the scattered statistics regarding the placer-gold production by years and by regions and districts. The purpose of the present report is to set forth in condensed but comprehensive form a summary of the placer-gold production of Alaska so far as it can be determined from the available official records."
Date: 1933
Creator: Smith, Philip S.
Partner: UNT Libraries Government Documents Department

Gold Veins Near Great Falls, Maryland

Description: From abstract: Small deposits of native gold are present along an anastomosing system of quartz veins and shear zones just east of Great Falls, Montgomery County, Md. The deposits were discovered in 1861 and were worked sporadically until 1951, yielding more than 5,000 ounces of gold. The vein system and the principal veins within it strike a few degrees west of north, at an appreciable angle to foliation and fold axial planes in enclosing rocks of the Wissahickon Formation of late Precambrian (?) age. The veins cut granitic rocks of Devonian or pre-Devonian age and may be as young as Triassic. Further development of the deposits is unlikely under present economic conditions because of their generally low gold content and because much of the vein system lies on park property, but study of the Great Falls vein system may be useful in the search for similar deposits elsewhere in the Appalachian Piedmont.
Date: 1969
Creator: Reed, John Calvin, Jr. & Reed, John Calvin
Partner: UNT Libraries Government Documents Department

The History and Development of Gold Dredging in Montana: with a Chapter on Placer-Mining Methods and Operating Costs

Description: From Introduction: "Although the purpose of this paper is to describe gold dredging in Montana, a brief mention of some early appliances used in New Zealand, Australia, and California may serve as a world-connecting link in our consideration of the development of gold dredging."
Date: 1916
Creator: Jennings, Hennen
Partner: UNT Libraries Government Documents Department

Safety Practices in California Gold Dredging

Description: From Introduction Purpose of Report: "The importance of safety work in connection with the operations of gold dredges assumed such proportions at one time that the State of California deemed it necessary to issue a special bulletin on this subject."
Date: 1932
Creator: Ash, S. H. (Simon Harry), b. 1889
Partner: UNT Libraries Government Documents Department

Sodek's Gold

Description: Sodek's Gold is a novel based on individuals the writer has known in the Caribbean who have been placed in fictitious circumstances. Included are social issues, conditions, and dialects found there. The main character, David Sodek, is an Englishman working in the Caribbean who discovers an ancient coin and becomes obsessed with finding more. Sodek's search is impeded by the strongarm Mostyn, but with the help of his friend Elbert he recovers an underwater cache of golden treasure. Elbert is killed. Sodek avenges Elbert's death but ultimately relinquishes the gold and himself to the sea. The theme of the work involves Sodek's obsessive personality as seen in his increasingly pedantic and destructive search, and in his unrealistic belief that money buys freedom. Included between chapters are vignettes comparing the characters and nature, and foreshadowing following events.
Date: December 1987
Creator: Wetzel, Mary S.
Partner: UNT Libraries

Report of a Joint Committee Appointed from the Bureau of Mines and the United States Geological Survey by the Secretary of the Interior to Study the Gold Situation: October 30, 1918

Description: From Introduction: "The report presents statistical data compiled from various sources, showing the production of gold in the United States and other countries, with comparative figures for coal, iron, and other mineral products, and describes the sources and distribution of gold output in the United States."
Date: 1919
Creator: United States. Bureau of Mines.
Partner: UNT Libraries Government Documents Department

Chronology of Late Cretaceous Igneous and Hydrothermal Events at the Golden Sunlight Gold-Silver Breccia Pipe, Southwestern Montana

Description: A report about gold mineralization at the Golden Sunlight breccia pipe, southwestern Montana, is related to emplacement of Late Cretaceous alkali-calcic rhyolite and subsequent collapse of the Belt Supergroup wallrock and rhyolite in the pipe.
Date: 1996
Creator: DeWitt, Ed; Foord, Eugene E.; Zartman, Robert E.; Pearson, Robert C. & Foster, Fess
Partner: UNT Libraries Government Documents Department

Phase imaging and the evolution of a gold-vacuum interface atatomic resolution

Description: We observe, using phase maps obtained from a focal series ofimages, the evolution in time of agold-vacuum interface. What is seen isthe reconfiguration and removal of whole columns of goldatoms (typicallycontaining three to nine atoms) at the interface. These structuralchanges arediscussed with reference to the variation in binding energyalong the interface.
Date: September 1, 2006
Creator: Martin, A.V.; Ishizuka, K.; Kisielowski, C. & Allen, L.J.
Partner: UNT Libraries Government Documents Department

CO Oxidation at the Interface of Au Nanoclusters and the Stepped-CeO2(111) Surface

Description: To reveal the richer chemistry of CO oxidation by CeO2 supported Au Nanoclusters NCs)/Nanoparticles, we design a Au12 supported on a stepped-CeO2 model (Au/CeO2-step) and study various kinds of CO oxidation mechanisms at the interface of the Au/CeO2-step: oxygen spillover from the CeO2 to the Au NCs;2 CO oxidation by the O2 bound to the Au-Ce3+ interface;3 and CO oxidation by the Mars-van Krevelen (M-vK) mechanism.4 DFT+U calculations show that lattice oxygen at the CeO2 step edge oxidizes CO bound to Au NCs by the M-vK mechanism. CO2 desorption determines the rate of CO oxidation and the vacancy formation energy (Evac) is a reactivity descriptor for CO oxidation. The maximum Evac that insures spontaneous CO2 production is higher for the Au/CeO2-step than the Au/CeO2-surface suggesting that the CeO2-step is a better supporting material than the CeO2-surface for CO oxidation by the Au/CeO2. Our results also suggest that for CO oxidation by Au NCs supported on nano- or meso-structured CeO2, which is the case of industrial catalysts, the M-vK mechanism accounts for a large portion of the total activity.
Date: January 14, 2013
Creator: Y., Kim H. & Henkelman, G.
Partner: UNT Libraries Government Documents Department

Drilling and Sampling Tertiary Gold-Bearing Gravels at Badger Hill, Nevada County, California

Description: Report issued by the Bureau of Mines over gold-bearing deposits of Nevada County, California. Drilling and sampling of these gold deposits are discussed. This report includes tables, maps, illustrations, and photographs.
Date: 1974
Creator: McLellan, Russell R.; Berkenkotter, Richard D.; Wilmot, Richard C. & Stahl, Robert L.
Partner: UNT Libraries Government Documents Department

Congressional Gold Medals, 1776-2003

Description: Members of Congress and their staff frequently ask questions concerning the nature, history, and contemporary application of the process for awarding Gold Medals. This report responds to congressional inquiries concerning this process, and includes a historical examination and chronological list of these awards. It is intended to assist Members of Congress and staff in their consideration of future Gold Medal proposals, and will be updated as Gold Medals are approved.
Date: November 14, 2003
Creator: Stathis, Stephen W
Partner: UNT Libraries Government Documents Department

Congressional Gold Medals 1776-1999

Description: Since the American Revolution, Congress has commissioned gold medals as its highest expression of national appreciation for distinguished achievements and contributions. These medals should not be confused with the Medal of Honor, which is presented “in the name of the Congress of the United States,” and is often referred to as the Congressional Medal of Honor. Regulations for the Medal of Honor are established by the armed services. Congressional Gold Medals, conversely, can only be approved by Congress. This report provides a response to such inquiries and includes a historical examination and chronological list of these awards intended to assist Members of Congress in their consideration of future proposals to award Congressional Gold Medals. It will be updated annually.
Date: August 9, 1999
Creator: Stathis, Stephen W
Partner: UNT Libraries Government Documents Department

Initial Stages of Yield in Nanoindentation

Description: We have used the Interracial Force Microscope" to perform nanoindentations on Au single- crystal surfaces. We have observed two distinct regimes of plastic deformation which are distinguished by the magnitude of discontinuities in load relaxation. At lower stresses, relaxation occurs in small deviations from elastic behavior, while at the higher stresses they take the form of large load drops often resulting in complete relaxation of the applied load. These major events create a relatively wide plastic zone that subsequently deepens more rapidly than it widens. We discuss these findings in terms of contrasting models of dislocation processes in the two regimes.
Date: November 24, 1998
Creator: Houston, J.E.; Jarausch, K.F.; Kiely, J.D. & Russell, P.E.
Partner: UNT Libraries Government Documents Department

Congressional Gold Medals, 1776-2010

Description: Members of Congress and their staff frequently ask questions concerning the nature, history, and contemporary application of the process for awarding Gold Medals. This report responds to congressional inquiries concerning this process, and includes a historical examination and chronological list of these awards. It is intended to assist Members of Congress and staff in their consideration of future Gold Medal proposals, and will be updated as Gold Medals are approved.
Date: March 14, 2011
Creator: Glassman, Matthew Eric
Partner: UNT Libraries Government Documents Department

Critical Infrastructures: Background, Policy, and Implementation

Description: This report discusses in detail the evolution of a national critical infrastructure policy and the institutional structures established to implement it. The report highlights three issues of Congressional concern: allocating resources based on risk; information sharing; and, regulation.
Date: April 18, 2006
Creator: Moteff, John D.
Partner: UNT Libraries Government Documents Department

Congressional Gold Medals, 1776-2004

Description: This report responds to congressional inquiries concerning the process for awarding Congressional Gold Medals, and includes a historical examination and chronological list of these awards.
Date: November 23, 2004
Creator: Stathis, Stephen W.
Partner: UNT Libraries Government Documents Department

Congressional Gold Medals 1776-2003

Description: This report responds to congressional inquiries concerning the process for awarding Congressional Gold Medals, and includes a historical examination and chronological list of these awards.
Date: July 23, 2003
Creator: Stathis, Stephen W.
Partner: UNT Libraries Government Documents Department

Effects of Gold Sodium Thiomalate on Murine Spleen Cells

Description: The effects of gold sodium thiomalate (GST) on murine spleen cells were investigated using in vitro mitogen blastogenesis techniques. Addition of GST to intact spleen cells resulted in a decreased blastogenic response to the T cell mitogen, concanavalin A (Con A). Thymidine uptake of spleen cells depleted of macrophages and cultured with Con A and GST demonstrated biphasic effects. At 2.5 pg Con A/ml, blastogenesis of macrophage depleted spleen cells was inhibited to a lesser degree than intact spleen cells; whereas, at 0.5 pg Con A/ml, the macrophage depleted spleen cells were inhibited to a greater degree than the intact spleen cells. Addition of GST at intervals ranging from 0 to 48 hours indicated that inhibition occurred within 36 hours following mitogen stimulation. These results suggest that GST inhibits early events of lymphocyte activation by direct interaction with lymphocytes.
Date: December 1986
Creator: Brownback, Paul (Paul Eldon)
Partner: UNT Libraries