
TY  - JOUR
A1  - Lawrie, Ken 
A1  - Cathro, Donna 
A1  - Symington, Neil 
A1  - Christensen, Niels B. 
A1  - Harris-Pascal, Chris 
A1  - Tan, KokPiang 
A1  - McPherson, Andrew 
A1  - Gow, Laura 
T1  - Utilization of AEM Methods for Cost-Effective Mapping of Shallow Neogene Intra-Plate Fault Systems in Eastern Australian Coal Seam Gas Basins
JF  - ASEG Extended Abstracts
JO  - ASEG Extended Abstracts
Y1  - 2018
VL  - 2018
IS  - 1
SP  - 1
EP  - 1
KW  - 
UR  - https://doi.org/10.1071/ASEG2018ABP097 
N2  - Neogene fault systems are increasingly recognised as an important control on hydraulic connectivity in some of Australia&#x2019;s energy rich basins. However, accurate delineation of these faults systems is challenging and expensive. In this context, the main objective of the Exploring for the Future (EFTF) Surat-Galilee Basin (Phase 1) Project is to test novel methods for more cost-effective mapping of Neogene fault systems in the Coal Seam Gas (CSG) basins of eastern Australia. Methods assessed in this project include morphotectonic mapping using temporal remote sensing data and high-resolution terrain mapping techniques, airborne electromagnetics (AEM), and the use of earthquake databases to inform active tectonic and geomechanical analysis. The project is funded by Geoscience Australia (GA) as part of its EFTF Programme, and is focussed on exemplar areas in the Surat and Galilee Basins where Neogene fault activity has been interpreted on high-resolution 2D and 3D seismic reflection surveys. This paper reports on the use of airborne electromagnetics (AEM) for detecting near-surface (<50&#x2013;150m) Neogene faults in both basins. Approximately 4,500 line km of AEM data were acquired in a number of smaller acquisition blocks where Neogene faults had previously been identified. The AEM inversion results are compared with interpretation of seismic reflection data, morphotectonic mapping, and other hydrogeological and tectonic/geomechanical data. The utility of AEM to map the broader hydrogeological system in these basins, including groundwater-surface water connectivity (springs and rivers), is also assessed. 
ER  -

