This project explores the geochemical evolution and mantle source characteristics of Eastern Australian intraplate volcanic provinces. The research focuses on volatile-rich alkaline magmas and their role in transporting information about deep mantle processes to the surface through detailed analysis of melt inclusions and whole-rock geochemistry.
Research Objectives
- Characterize mantle source regions beneath Eastern Australian volcanic provinces
- Quantify volatile contents in primary melts through melt inclusion analysis
- Trace magma evolution paths from mantle source to surface eruption
- Compare volatile systematics across different volcanic provinces and time periods
Study Areas
The research encompasses several key volcanic provinces across Eastern Australia, including:
- Newer Volcanics Province - Recent basaltic volcanism in Victoria
- Liverpool Range Volcanics - Miocene volcanic complex in NSW
- Warrumbungle Volcanics - Complex alkaline volcanic suite
- Glass House Mountains - Distinctive volcanic plugs in Queensland
Methodology
The research combines field geology with state-of-the-art analytical techniques:
- Field sampling and petrographic analysis of volcanic rocks
- Olivine-hosted melt inclusion analysis via SIMS and EPMA
- Whole-rock major and trace element geochemistry
- Isotope systematics (Sr, Nd, Pb) for mantle source characterization
- Volatile analysis (COâ‚‚, Hâ‚‚O, S, Cl) in glasses and melt inclusions
Geological Context
Eastern Australian volcanism provides unique insights into intraplate magmatism, as it occurs within a stable continental margin setting. The volcanic provinces span different ages and tectonic settings, offering opportunities to understand temporal and spatial variations in mantle source characteristics and melting processes.
Significance
This research contributes to our understanding of:
- Continental intraplate volcanism and its driving mechanisms
- Mantle heterogeneity beneath the Australian continent
- Volatile transport from mantle to surface in alkaline systems
- The relationship between lithospheric structure and volcanism
Collaborations
This work involves collaborations with researchers at Macquarie University, the Australian National University, and the University of Melbourne, combining expertise in field geology, petrology, and geochemical analysis.