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Reconnaissance for Uranium in the Tocopilla area, Province of Antofagasta, Chile

Description: Abstract: In September-October 1958 a six-day reconnaissance in the Tocopilla area, Antofagasta Province, Chile, was made by members of the U.S. Atomic Energy Commission and the Instituto de Investigaciones Geológicas de Chile for the purpose of evaluating reported uranium occurrences.
Date: February 1959
Creator: Bowes, William A.; Knowles, Paul H.; C., Mario Serrano & S., Rudolfo Grüenwald
Partner: UNT Libraries Government Documents Department

Reconnaissance for Uranium in the Uinta Basin of Colorado and Utah

Description: Abstract: Weak uranium mineralization is widespread throughout the Uinta Basin of northeastern Utah and northwestern Colorado, in rocks ranging in age from Permian to Eocene. No commercial ore bodies are known, although formations there have characteristics elsewhere considered favorable for ore deposition.
Date: January 1957
Creator: Noble, E. A. & Annes, E. C.
Partner: UNT Libraries Government Documents Department

Reconnaissance Geology of Placer Deposits Containing Radioactive Minerals in the Bear Valley District, Valley County, Idaho

Description: From introduction: The Bear Valley district is situated in southwestern Idaho, in the drainage of the Middle Fork of the Salmon River (see fig. 1). The placer deposits were drilled by the U. S. Bureau of Mines in 1951 and 1952 to determine their content of monazite and "radioactive black minerals" (here referred to loosely as "radioactive blacks"). The purpose of the study outlined here was to provide a geologic background for an understanding of the origin and distribution of the placer minerals.
Date: January 1953
Creator: Mackin, J. Hoover & Schmidt, Dwight Lyman
Partner: UNT Libraries Government Documents Department

Reconnaissance in the Western Part of the Trans-Pecos Region of Texas

Description: Abstract: The Trans-Pecos region of southwest Texas is noted for the production of quicksilver, lead, silver, and copper from its several mining districts. Reconnaissance, which was concentrated in and around these districts, revealed many areas of slightly abnormal radioactivity. Only a few areas, however, showed uranium mineralization.
Date: January 23, 1953
Creator: Hadfield, Jonathan P.
Partner: UNT Libraries Government Documents Department

Reconnaissance of Henry Mountains Area, Wayne and Garfield Counties, Utah

Description: From introduction: A trip into the Henry Mountains area occupied the days from March 6 to 9, 1951, inclusive, excepting March 7, which was used to examine Reo Hunt's deposit in Poison Spring Wash. Observations were made on stratigraphy, regional geology, and the locations of the known deposits of uranium and vanadium.
Date: April 5, 1951
Creator: Reinhardt, E. V.
Partner: UNT Libraries Government Documents Department

Reconnaissance of Iron Occurrences in Colorado

Description: Report issued by the U.S. Bureau of Mines discussing iron deposits found in Colorado. As stated in the summary, "this paper describes the location and general features of iron occurrences in Colorado" (p. 1). History, geology, production, and use of Colorado iron ore is presented. This report includes tables, illustrations, and a map.
Date: 1959
Creator: Harrer, C. M. & Tesch, W. J., Jr.
Partner: UNT Libraries Government Documents Department

Reconnaissance of Metal Mining in the San Juan Region: Ouray, San Juan, and San Miguel Counties, Colorado

Description: Report issued by the U.S. Bureau of Mines discussing metal mines in Colorado. As stated in the summary, "this paper describes the mineral deposits and discusses mining and milling methods and related operating conditions in an important gold, silver, lead, and zinc producing area in Ouray, San Juan, and San Miguel Counties, Colo., embracing 250 square miles" (p. 5). This report includes tables, maps, and illustrations.
Date: March 1950
Creator: King, William H. & Allsman, Paul T.
Partner: UNT Libraries Government Documents Department

Reconnaissance of the Beluga River Coalfield, Alaska

Description: Report issued by the Bureau of Mines over studies conducted on the Beluga River coalfield "to determine, if possible, which areas were most favorable for developing large reserves of coal suitable for open-pit mining" (p. 1). Description of the coal deposits, and results of the study are presented. This report includes tables, illustrations, and maps.
Date: 1958
Creator: Maloney, Raymond P.
Partner: UNT Libraries Government Documents Department

Reconnaissance of the Lower Chinle Along the Colorado River Between the Moab and Dewey Bridges, Grand County, Utah

Description: Abstract: The sandstones and conglomerates contained in the Shinarump conglomerate stratigraphic level in the area along Colorado River between the Moab and Dewey bridges have been assigned to the lower Chinle. One small anomaly was located, but no favorable radioactive areas were found. Gray-green mudstone and siltstone zones and carbonated material are absent.
Date: October 4, 1954
Creator: Rogers, K. J.
Partner: UNT Libraries Government Documents Department

A Reconnaissance of the Northwestern Portion of Seward Peninsula, Alaska

Description: From introduction: In response to an urgent demand by the public, the Geological Survey, in 1900, undertook a topographic and geologic reconnaissance of the southern half of the Seward Peninsula.( The area mapped embraced the more important gold fields of the peninsula. The topographic map made in 1900 included the drainage of Bering Sea from Cape Darby to Port Clarence, the southern drainage of Grantley Harbor and Imuruk Basin, and the northern drainage of Norton Sound. A geologic reconnaissance was also made of the York mining district and of part of the Kuzitrin drainage.
Date: 1902
Creator: Collier, Arthur J.
Partner: UNT Libraries Government Documents Department

Recording rapidly changing cylinder-wall temperatures

Description: The present report deals with the design and testing of a measuring plug suggested by H. Pfriem for recording quasi-stationary cylinder wall temperatures. The new device is a resistance thermometer, the temperature-susceptible part of which consists of a gold coating applied by evaporation under high vacuum and electrolytically strengthened. After overcoming initial difficulties, calibration of plugs up to and beyond 400 degrees C was possible. The measurements were made on high-speed internal combustion engines. The increasing effect of carbon deposit at the wall surface with increasing operating period is indicated by means of charts.
Date: May 1, 1942
Creator: Meier, Adolph
Partner: UNT Libraries Government Documents Department

Recovery and time-response characteristics of six thermocouple probes in subsonic and supersonic flow

Description: Experimental data obtained from three shielded and three unshielded thermocouple probes are presented. Data taken in air at room temperature over the ranges 0.2 to 2.2 Mach number and 0.2 to 2.2 atmospheres total pressure show reproducible systematic variations of recovery with Mach number, ambient pressure, flow angle, and probe design. Time-constant data determined at Mach 0.2 and room temperature and pressure indicate that unshielded probes are several times faster in response to temperature changes than shielded probes.
Date: July 1, 1955
Creator: Stickney, Truman M
Partner: UNT Libraries Government Documents Department

Recovery of Actinides from TBP-Na₂CO₃ Scrub-Waste Solutions: the ARALEX Process

Description: A flow-sheet for the recovery of actinides from TBP-Na2CO3scrub-waste solutions has been developed, based on batch extraction data, and tested, using laboratory-scale countercurrent extraction techniques. The process, called the ARALEX process, uses 2-ethyl-1-hexanol (2-EHOH) to extract the TBP degradation products (HDBP and H/sub 2/MBP) from acidified Na2CO3scrub waste leaving the actinides in the aqueous phase. Dibutyl and monobutyl phosphoric acids are attached to the 2-EHOH molecules through hydrogen bonds, which also diminish the ability of the HDBP and H2/MBP to complex actinides. Thus all actinides remain in the aqueous raffinate. Dilute sodium hydroxide solutions can be used to back-extract the dibutyl and monobutyl phosphoric acid esters as their sodium salts. The 2-EHOH can then be recycled. After extraction of the acidified carbonate waste with 2-EHOH, the actinides may be readily extracted from the raffinate with DHDECMP or, in the case of tetra- and hexavalent actinides, with TBP. The ARALEX process can also be applied to other actinide waste streams which contain appreciable concentrations of polar organic compounds (e.g., detergents) that interfere with conventional actinide ion exchange and liquid-liquid extraction procedures.
Date: August 1979
Creator: Horwitz, E. P.; Bloomquist, C. A. A.; Mason, G. W.; Leonard, R. A. & Ziegler, A. A.
Partner: UNT Libraries Government Documents Department