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August 11, 2022 (Thursday)
The University Club of Western Australia
Hackett Entrance #1, Hackett Drive Crawley WA 6009
Geoscience Australia has been heavily involved in developing airborne electromagnetics (AEM) as a geophysical method, from its origins as a qualitative “bump finding” survey technique to a quantitative tool for subsurface modelling. This advancement had led to rapid expansion of Australia’s AEM coverage over the last half a decade through Geoscience Australia’s Exploring for the Future program and collaborations with state and territory geological surveys. The team at Geoscience Australia is experienced across all aspects of AEM programs including survey planning, managing data acquisition, data QA/QC, processing and inversion, and geological interpretation. In this one-day workshop we aim to pass on our experience by demonstrating AEM theory and practice.
The workshop will be divided into three sessions covering data acquisition, AEM inversion, and interpretation. In the first workshop session, we will introduce the theoretical principles of airborne electromagnetic surveys, walk through the process of planning data acquisition and demonstrate our best practices for QA/QC in the context of Geoscience Australia AEM technical deed, which assures AEM data are acquired to a high standard.
In the second session, we will explore the inversion of AEM data to generate bulk conductivity models. This session will include a tutorial on the range of inversion codes developed in-house, including deterministic Occam inversions that produce a smooth model with a good data fit, as well as advanced Monte Carlo algorithms that sample hundreds of thousands of models with good data fit and allow rigorous specification of prior knowledge of subsurface conductivity.
In the final session, we will explore how we interpret subsurface features from AEM conductivity models at Geoscience Australia. The focus of this session will be on avoiding some of the common pitfalls in AEM interpretation by understanding the considerable uncertainty and ambiguity involved. By facilitating this workshop and providing practical examples for participants to work through, we aim to build an AEM community within Australia that can make the best use of these valuable, and relatively easy to acquire data.
Participants will need to bring their own laptop to the workshop to participate in the practicals through cloud hosted exercises.
| Time | Activity | Topic | Presenter |
|---|---|---|---|
| 8:30 – 8:45 | Arrival | Registration, tea, and coffee | |
| 8:45 – 9:00 | Welcome | Introduction | Karol Czarnota |
| 9:00 – 9:15 | Talk | Geological Survey of Western Australia reflections on AEM | TBA |
| 9:15 – 10:00 | Lecture 1 | Theory, data acquisition and 1st pass data QA/QC | Yusen Ley Cooper |
| 10:00 – 10:45 | Practical 1 | Planning acquisition and 1st pass data QA/QC | Yusen Ley Cooper |
| 10:45 – 11:15 | Morning Tea | ||
| 11:15 – 12:30 | Lecture 2 | AEM Inversion | Anand Ray |
| 12:30 – 13:15 | Lunch | ||
| 13:15 – 14:45 | Practical 2 | AEM Inversion | Anand Ray |
| 14:45 – 15:15 | Afternoon Tea | ||
| 15:15 – 16:15 | Lecture 3 | AEM Interpretation | Neil Symington and Sebastian Wong |
| 16:15 – 17:00 | Practical 3 | AEM Interpretation | Neil Symington and Sebastian Wong |
This event is FREE but is limited to 40 participants only. Morning tea, light lunch and afternoon tea will be served. |
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This event is now fully booked. For questions or enquiries, please contact aigwa@aig.org.au.
BookingsThis event is fully booked. |
