Dillon Brown

Higher Degree by Research Candidate

School of Physics, Chemistry and Earth Sciences

Faculty of Sciences, Engineering and Technology

My research focuses on understanding the temporal and thermobarometric evolution of lithospheric processes, with the overarching aim of refining palaeotectonic models, continental reconstructions, and models for the development of mineralisation. Within this broad framework, I am interested in understanding the development of complex crustal systems that have witnessed multiple tectonic events. An understanding of such systems requires the integration of an array of techniques to constrain the ages and physical conditions of metamorphism. These tools include metamorphic petrology and pressure–temperature (P–T) phase equilibrium modelling to identify superimposed mineral assemblages and determine P–T histories, geochronology using mass spectrometry technologies, including modern reaction cell systems, and geochemistry and the compositional characterisation of mineral assemblages.

Topics of interest to me include (1) regional geology and tectonics, (2) Precambrian geology and supercontinent reconstructions, (3) subduction zone processes, (4) the emergence of eclogite-facies metamorphism in the geological record, (5) the evolution of metamorphic thermal gradients through Earth’s history and plate tectonics, (6) polymetamorphism – characterising polymetamorphic terranes using targeted petrochronological techniques, (7) the link between metamorphism and mineralisation – determining the timing and conditions of metamorphic/metasomatic overprints hosting mineralisation, (8) magmatic Ni–Cu–Fe sulphide systems, (9) harnessing the capability of modern laser-ablation reaction cell technologies to address a range of geological questions.

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