Department of Earth and Planetary Sciences Seminars
The Department of Earth and Planetary Sciences holds research seminars on a regular basis - please see below for the upcoming Department seminars. Staff and students are welcome to attend.
|6th April 2018, 3-4pm 11WW (E5A) 120 Tute Room||Dr. Ilya Fomin||Numerical simulations of melting and melt migration in the Earth's mantle|
Origin and composition of lower mantle heterogeneities is a crucial question for modern Earth's geodynamics. Most of models imply higher iron content to fit the observations, but it should also decrease solidus. Melting results in non-linear chemical differentiation of rocks, which may not be simulated in terms of fixed end members. I present results of numerical simulations with oxide-wise treatment of melting applied to possible LLSVP and ULVZ compositions. It allows to restrict maximum possible times of their preservation, as well as range of compositions which agree with geophysical data.
In addition, some other applications of this geodynamic code will be shown. All the simulations use modified version of StagYY.
|13th April 2018, 3-4pm|
11WW (E5A) 140 Tute Room
|Dr. Kathrine Dafforn||Assessing the ecological impacts of contaminant legacies and land-based discharges in estuaries.|
Estuaries are diverse and productive ecosystems that are subject to high levels of disturbance. They are exposed to multiple stressors such as legacy contaminants in sediments and ongoing inputs of nutrients and metals via stormwater. I will present the results from two studies that link ecological change to human impacts along the coast. Firstly, a large-scale study of ten NSW estuaries, which aimed to develop biomonitoring tools that would be sensitive to human impacts above and beyond changes to natural environmental conditions. Secondly, a study of stormwater impacts within Sydney Harbour, which aimed to link changes in ecosystem structure to function. The results have implications for future biomonitoring and management of human impacts in estuaries and increase our understanding of how to conserve crucial estuarine community diversity and function.