Archive

Wed 16th May @ noon, Rm 312.222 Abstract: The Petrel Basin is a NW-SE trending graben, orthogonal to and most likely older than the NE-SW trending structures that dominate the North West Shelf. The development of salt structures is closely related to the complex multi-phase evolution of the basin and the adjacent passive margin. Although not penetrated […]

Tues 24th April @ noon, Rm 312.222 Abstract: Iron oxide minerals are found in almost every surficial environment on Earth where they participate in a variety of biogeochemical processes, record paleo-environmental conditions and host economic quantities of critical metals. Highly crystalline iron oxides (e.g., goethite, hematite) are thought to resist alteration under ambient conditions in aqueous fluids. However, […]

Wed 28th March @ noon, Rm 312.222 Abstract: Assembly of Rodinia culminated in development of the collisional Grenville-Sveconorwegian orogen at 1.2-1.0 Ga. The tectonic significance of early Neoproterozoic (980-920 Ma) tectonothermal events recorded in the North Atlantic borderlands of Ellesmere Island, East Greenland, Norway and Svalbard is less well understood. This is partly because most rock units […]

Wed 21st March @ noon, Rm 312.222 Abstract: Thousands of exoplanets have been discovered in solar systems with a range of C/O ratios. This ratio has a large control on the oxygen fugacity under which planets in the systems form and evolve. In our solar system, the planet Mercury lies at the extreme low end of oxygen […]

Wed 7th March @ noon, Rm 312.222 Abstract: A fundamental principle of Earth’s geochemical evolution holds that continental crust is formed by extraction of melts from the mantle, leaving part of the mantle depleted in incompatible elements. The Sm-Nd and Lu-Hf isotope systems have long been used to show that this process has been an essential feature of […]

Wed 28th January @ noon, room 312.222 Abstract: Arc magmas are oxidised relative to MORB, leading to the controversial proposal that the mantle beneath arcs is more oxidised than the mantle elsewhere.  A cause proposed to explain this oxidation is that the presence of water during peridotite melting beneath the arcs affects the melt structure, thereby […]

Wed 21st January @ noon, Rm 210.104 Abstract: Topic 1: A 4463 Ma apparent zircon age from the Jack Hills resulting from ancient Pb mobilization Hadean (≥4.0 Ga) zircon grains provide the only direct record of the first half billion years of Earth’s history. Determining accurate and precise crystallization ages of these ancient zircons is a prerequisite for […]

Wed 14th January @ noon Abstract: With its almost inexistant erosion, the lunar surface preserves a good record of the early Earth-Moon system evolution. Over the past decade, lunar science has benefited from a rapid increase in international interest. Many missions from different space agencies have shed a new light on our closest neighbor, but also […]

Wed 24th January @ noon, Rm 312.207 Abstract: After over a century of intensive research, the Kalgoorlie goldfields, home to the giant Golden Mile Au-Te deposit, still hold undiscovered treasures. The Hidden Secret Ag-Au-Te deposit, located 1 km northwest of the Golden Mile Superpit and 350 m east of the Mt Charlotte mine, is a resource recently […]