Examining geochemical processes in acid sulphate soils using stable sulphur isotopes

The geochemical processes operating during the formation, oxidation and reformation of sulfidic materials were examined in this thesis using stable sulfur isotopes. Samples were collected from inland and coastal acid sulfate soil environments and the sulfur isotope signature of the sulfide and sulfate fractions were determined. Sulfur isotopes were found to be useful in identifying sites where acid sulfate soils were oxidising, tracking the geochemical changes occurring during remediation and understanding the environment that existed as acid sulfate soil materials were forming. Understanding these processes has improved the way sulfidic sediments can be identified and managed.