Macquarie University
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Applications of U-series disequilibria and ²³⁶U isotopes: understanding low temperature redox uranium mineralisation

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posted on 2022-03-28, 17:50 authored by Melissa Jean Murphy
"Variations in uranium isotope compositions are well documented in groundwaters and uranium ores. This is due to the different geochemical and radiogenic behaviours of uranium nuclides during water-rock interactions, and a result of neutron capture processes. These variations are particularly evident within sandstone-hosted uranium deposits which are formed by the low temperature reduction of U(VI) to U(IV). This thesis investigates the behaviour of uranium nuclides during ore formation processes using U and Th concentrations, U-series isotopic ratios (including (234U/238U), (230Th/232Th), (238U/232Th) and (230Th/238U) activity ratios, 238U/235U ratios and 236U/238U ratios from a suite of groundwaters and mineralised sediments in the vicinity of several South Australian sandstone-hosted uranium deposits." -- Abstract.


Alternative Title

Applications of U-series disequilibria and 236U isotopes

Table of Contents

Chapter I. Thesis introduction -- Chapter II. U-series disequilibria in groundwaters in a low temperature redox uranium mineralised system -- Chapter III. Fractionation of 238U/235U by reduction during low temperature uranium mineralisation processes -- Chapter IV. Detection of natural 236U in groundwaters and ores in the vicinity of several high-grade sandstone-hosted uranium deposits -- Chapter V. U-series disequilibria in the Beverley sandstone-hosted uranium deposit (South Australia): evidence for recent uranium mobilisation -- Chapter VI. Synthesis and directions for future research -- Appendices: supplementary material.


A thesis submitted in fulfilment of the requirements for the degree of Doctor of Philosophy in the Faculty of Science, Macquarie University". "December 2012 Includes bibliographical references

Awarding Institution

Macquarie University

Degree Type

Thesis PhD


PhD, Department of Earth and Planetary Sciences, Faculty of Science, Macquarie University, Australia

Department, Centre or School

Department of Earth and Planetary Sciences

Year of Award


Principal Supervisor

Simon Turner

Additional Supervisor 1

Bruce Schaefer


Copyright Melissa Murphy 2013. Copyright disclaimer:




1 online resource (xiii, 215 pages) illustrations (coloured)

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