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The geochemistry of trace elements with variable oxidation states. The understanding of many earth processes is based upon an interpretation of differences in the relative abundance and/or distribution of elements which occur in more than one oxidation state. However, the redox states that control the geochemical behaviour of an element in a melt are not necessarily retained on cooling. This work aims to determine the oxidation states of geologically important elements, in situ under magmatic ....The geochemistry of trace elements with variable oxidation states. The understanding of many earth processes is based upon an interpretation of differences in the relative abundance and/or distribution of elements which occur in more than one oxidation state. However, the redox states that control the geochemical behaviour of an element in a melt are not necessarily retained on cooling. This work aims to determine the oxidation states of geologically important elements, in situ under magmatic conditions, using XANES spectroscopy. The results will allow geological signatures to be correctly interpreted and allow models for topics ranging from ancient mantle temperatures to rates of melt migration to be better constrained.Read moreRead less
The hydrothermal solubility of molybdenum: A LA-ICPMS study of synthetic and natural fluid inclusions. The solubility of molybdenum under magmatic-hydrothermal conditions is essentially unknown. This study will, for the first time, identify the fundamental controls on molybdenum solubility in porphyry systems. This information will provide geologists with basic information on the transport and deposition of this important ore metal. In an allied study, the ore metals; copper, gold and molybdenum ....The hydrothermal solubility of molybdenum: A LA-ICPMS study of synthetic and natural fluid inclusions. The solubility of molybdenum under magmatic-hydrothermal conditions is essentially unknown. This study will, for the first time, identify the fundamental controls on molybdenum solubility in porphyry systems. This information will provide geologists with basic information on the transport and deposition of this important ore metal. In an allied study, the ore metals; copper, gold and molybdenum, will be traced through the Kidston porphyry system, Queensland. This will clarify the processes that lead to ore deposition, which will ultimately allow geologists to more effectively explore for porphyry-type deposits, a major target for Australian mining companies in the Pacific region.Read moreRead less