• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 23
  • 11
  • 2
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • Tagged with
  • 39
  • 39
  • 19
  • 6
  • 5
  • 5
  • 4
  • 4
  • 4
  • 3
  • 3
  • 3
  • 3
  • 3
  • 3
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Chemical mass transfer and solution flow in Wyoming roll-type uranium deposits

Capuano, Regina M. January 1977 (has links)
No description available.
2

Geology of the Gunnar uranium deposit, Beaverlodge area, Saskatchewan

Evoy, E. F. January 1961 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1961. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 76-80).
3

The process mineralogy of selected Southern African uranium ores

Youlton, Brandon 06 May 2015 (has links)
A thesis submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Doctor of Philosophy. Johannesburg, December 2014. / During the acid leaching of uranium, gangue-reagent interactions have both negative and positive consequences. Gangue dissolution increases reagent costs, and in some cases can prevent the economic acid leaching of an ore, but can also increase uranium mineral exposure and improve recoveries. Due to rapid dissolution kinetics, the acid consumption characteristics of the various carbonate species are readily predicted, however the same is not true of silicate gangue. Due to factors including slower leach rates, incongruent dissolution, parabolic kinetics, and surface area, pH and temperature dependence, the gangue acid consumption characteristics of silicate minerals are significantly more complex. A detailed mineralogical investigation and acid leach tests were conducted on sandstone- and granite-hosted uranium ore samples. The dissolution characteristics of the more common gangue phases were determined. The study demonstrated that gangue-reagent interactions and U dissolution can be predicted from mineralogical data. A model was developed which allows for the use of mineralogical and geochemical data to predict gangue reagent consumption. The basic framework of the model is universally applicable, but may require calibration, depending on the mineral assemblage and complexity of a specific uranium deposit.
4

A survey of hydrothermal uranium occurrences in southeastern Arizona

Bissett, David Halsey, 1925- January 1958 (has links)
No description available.
5

Origin and occurrence of uranium in northern Michigan

Vickers, Rollin C., January 1956 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1956. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 68-71).
6

The geology and geochemistry of some epigenetic uranium deposits near the Swakop river South West Africa

Hambleton-Jones, Brian Basil. January 1976 (has links)
Thesis (D.Sc.)(Geology)--University of Pretoria, 1976. / Includes summary. Includes bibliographical references. Available on the Internet via the World Wide Web.
7

Fluid inclusion and oxygen isotope studies of the Nabarlek uranium deposit N.T. Australia /

Fuzikawa, Kazuo. January 1982 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, 1982. / Errata sheet inserted. Includes bibliographical references (leaves 215-226).
8

Geological factors affecting the grade and tonnage of sandstone uranium deposits

Holliman, K A 19 March 2013 (has links)
The largest known reserves of uranium are found in sandstone deposits, in the form of roll-front, peneconcordant and stacked types. Drilling on spacings of between 50 m and 5 m centres is the current method of attempting to delineate such ore bodies but because of the apparent random distribution of the mineralization there is a large degree of uncertainty in these predictions. Even on drilling grids of 3,5 m centres the uncertainty in predicting the distribution of stringer ore in roll front mineralization is still 100 per cent. (Sandefur & Grant 1980). Because of escalating costs it is becoming increasingly less economically feasible to delineate bodies of this nature in this manner and much more reliance will have to be placed on the geologist's interpretation of ore distribution when calculating ore reserves. The grade and tonnage of a sandstone uranium deposit can only be calculated with some degree of confidence if the processes forming the ore body are fully understood. The aim of this review is to examine the factors governing the formation and geometry of a sandstone body, the mobility and fixation of uranium and to establish criteria which will enable a more confident prediction to be made of the distribution of sand bodies and the distribution of the mineralization within them
9

A uranium anomaly in the Silver Bell prospect, Sweetwater County, Wyoming

Monzon Cisneros, Felipe Gregorio, 1940-, Monzon Cisneros, Felipe Gregorio, 1940- January 1970 (has links)
No description available.
10

Uranium, copper, and vanadium content of selected arenaceous sediments from the lower Supai Formation, Mogollon Rim, Arizona

Jones, Nile O. January 1977 (has links)
No description available.

Page generated in 0.1997 seconds