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LIST
TILES
Node quality control using drones and object detection
- Publication Name: AEGC 2021
- Authors: Jason Stephenson, Shaun Strong
- Date Published: September 2021
Abstract:
Wireless nodal surveys are now commonplace in Australian land seismic. It is essential that rigorous QC of the condition of the nodes is performed during these surveys. Acquiring footage using off-the-shelf drones can assist with this....
Multi-scale magnetotelluric surveys – mapping from the lithosphere to the near surface for mineral systems
- Publication Name: AEGC 2021
- Authors: Wenping Jiang, Jingming Duan, Anthony Schofield, Ross C. Brodie, Andrew Clark
- Date Published: September 2021
Abstract:
Geoscience Australia has undertaken a series of integrated studies to map the footprint of mineral systems at multiple scales. We have used long-period data from the Australian Lithospheric Architecture Magnetotelluric Project (AusLAMP) to resolve la...
Compositional control on frictional properties of Goldwyer shale reservoir rocks
- Publication Name: AEGC 2021
- Authors: Partha Pratim Mandal, Reza Rezaee, Mustafa Sari, Joel Sarout
- Date Published: September 2021
Abstract:
Production from ultra-low permeable gas shale reservoirs is feasible only through hydraulic fracturing stimulation. Slip along a pre-existing natural network of fractures/faults with the injection of hydraulic fluid is mostly controlled by the fricti...
Optimising 3D coal seismic imaging with pre-stack depth migration
- Publication Name: AEGC 2021
- Authors: Xiaodong Lu, Alan Meulenbroek, Karel Driml
- Date Published: September 2021
Abstract:
Pre-stack depth migration (PSDM) is applied to a 3D seismic survey from the Bowen Basin in QLD to improve imaging of shallow coal-seams which suffer from poor signal-to-noise caused by poor statics and velocities. Two different velocity fields are us...
Using the NCI Gadi Supercomputer to revolutionise processing of MT time series data: results from the GeoDeVL experiment
- Publication Name: AEGC 2021
- Authors: Nigel Rees, Sheng Wang, Ben Evans, et al.
- Date Published: September 2021
Abstract:
MagnetoTelluric (MT) time series datasets are expensive to acquire, can be high volume (100s of terabytes), and the time taken to publish (measured from collection to release) often takes more than two years. Time series datasets have been notoriousl...
Seismic velocity analysis in the presence of AVO polarity reversals by fuzzy c-mean clustering
- Publication Name: AEGC 2021
- Authors: M. Javad Khoshnavaz, Duy Thong Kieu, Hamidreza Siahkoohi, Andrej Bόna
- Date Published: September 2021
Abstract:
Routine seismic imaging algorithms often require velocity models. Therefore, accuracy of velocity models obtained by velocity analysis plays a crucial role in seismic imaging. Seismic velocity analysis in CMP domain has been dominated by the use of a...
Application of passive seismic for exploration in the Palaeozoic basement underneath Tertiary basalts, western Tasmania
- Publication Name: AEGC 2021
- Authors: Chuang Wang, Gerrit Olivier, Martin Jutzeler
- Date Published: September 2021
Abstract:
Over the last two decades, ambient seismic noise (or background vibrations) have been successfully used with seismic interferometry to gain information on the subsurface without the need of an active source such as a vibrating truck or explosion. The...
The Winu-Ngapakarra deposit in the Great Sandy Desert of Western Australia, a Neoproterozoic Intrusion-related Cu-Au-Ag deposit
- Publication Name: AEGC 2021
- Authors: Hilke Dalstra, Adam Black, Inna Mudrovska
- Date Published: September 2021
Abstract:
The Winu Cu-Au-Ag deposit was discovered in late 2017 and is hosted in metamorphosed sandstones and siltstones and lesser mafic rocks which are most likely correlatives of the upper Malu Formation of the Yeneena Basin. The deposit structure is domina...
CRC-P-57322 High-resolution Real-time Airborne Gravimetry
- Publication Name: AEGC 2021
- Authors: Andrew Gabell, Timothy Crain, Glenn D Hines, et al.
- Date Published: September 2021
Abstract:
Airborne gravimetry relies on removing inertial aircraft accelerations from total accelerations measured by an onboard gravimeter. NASA developed a Navigation Doppler Lidar (“NDL”) for the US Space Program. The NDL measures velocities at the 1 mm...
Attenuation of ice-sheet reverberations in teleseismic P-wave receiver functions
- Publication Name: AEGC 2021
- Authors: Dale Harpley, Steve Hearn, Shaun Strong
- Date Published: September 2021
Abstract:
Teleseismic P-wave receiver functions (PRFs) in icecovered regions are contaminated by reverberations within the ice-sheet. The crustal conversion events which are commonly used for identifying lithospheric structure are concealed by these ice reverb...
Noble gases: a versatile exploration tool for water, minerals and hydrocarbons
- Publication Name: AEGC 2021
- Authors: Axel Suckow, Cornelia Wilske, Christoph Gerber, Alec Deslandes, Punjehl Crane, Dirk Mallants
- Date Published: September 2021
Abstract:
Noble gases exist mainly as stable and some radioactive isotopes and are amongst the most versatile geoscientific exploration tools. Popular applications across nearly all areas involving fluid movement in the geosphere include: groundwater and its r...
Yaouré Seismic Survey: Defining a Complex 3D Structural Framework with High Resolution Seismic Data
- Publication Name: AEGC 2021
- Authors: Greg Turner, Cissé Amadou, Peter Turner, Graeme Hird, Doug Jones
- Date Published: September 2021
Abstract:
Approximately 4Moz of gold have been discovered to date at the Yaouré gold deposit in Côte d’Ivoire, demonstrating the high endowment of the area despite little exploration at depths beyond 350m. With the objective of accelerating its search for ...
A new method for determining drill-bit signal emission time
- Publication Name: AEGC 2021
- Authors: Zixing Qin, Milovan Urosevic, Andrej Bona, Roman Pevzner, Konstantin Tertyshnikov
- Date Published: September 2021
Abstract:
In 2019, the first ever Seismic While Drilling (SWD) dataset recorded by Distributed Acoustic Sensing (DAS) fibre optic cable was acquired at the Otway Carbon Capture and Storage (CCS) site. After analysing the recorded signal, a new technique named ...
An integrated hydrogeophysical and hydrogeological approach to underpin the long-term water security of a remote tropical island
- Publication Name: AEGC 2021
- Authors: Andrew R Taylor, Tim Munday, Chris Turnadge, Joanne Vanderzalm, et al.
- Date Published: September 2021
Abstract:
Groundwater resources that sustain small Indigenous communities in remote parts of northern Australia are often poorly characterised, in part due to their remoteness and the economics of undertaking field investigations. The Warruwi community on Sout...
Inverting the head wave coefficient with the Werth equation
- Publication Name: AEGC 2021
- Authors: Derecke Palmer
- Date Published: September 2021
Abstract:
The head wave coefficient, the refraction analogue of the reflection coefficient, is a complex function of the densities and the P- and S-wave velocities in both the weathered and sub-weathered regions. In general, the head wave coefficient increases...
Full waveform refraction imaging of the regolith with the CIG stack
- Publication Name: AEGC 2021
- Authors: Derecke Palmer
- Date Published: September 2021
Abstract:
Full waveform refraction imaging with the common intercept gather (CIG) is a simple application of the stacking procedures routinely employed with seismic reflection data processing to the standard intercept time method. Accordingly, the stacked full...
Halloysite Nanotubes – The New Economy Mineral to Ensure Every Organisation Achieves Net Zero Carbon Emissions
- Publication Name: AEGC 2021
- Authors: Antonio Belperio
- Date Published: September 2021
Abstract:
Halloysite, a nanotubular version of the more common, platy clay mineral, kaolinite is globally-rare, but present in great abundance in several world-class kaolinhalloysite deposits recently defined on western Eyre Peninsula. Conventionally, halloysi...
How to enhance Magnetotellurics resistivity model resolution using passive seismic HVSR to identify the cover-basement interface
- Publication Name: AEGC 2021
- Authors: Nuwan Suriyaarachchi, Jeremie Giraud, Hoel Seille, Mark Lindsay, Vitaliy Ogarko, Lachlan Hennessy, Mark Jessell
- Date Published: September 2021
Abstract:
Magnetotelluric (MT) and the passive seismic Horizontal to Vertical Spectral Ratio (HVSR) methods are commonly used to characterize cover thickness. While MT is sensitive to resistivity contrasts in the subsurface, the MT data inversion process is af...
Probabilistic modelling of groundwater salinity using borehole and airborne electromagnetics (AEM) data
- Publication Name: AEGC 2021
- Authors: Neil Symington, Anandaroop Ray, Chris Harris-Pascal, Kok Piang Tan, Richard Taylor, Yusen Ley-Cooper, Ross C Brodie
- Date Published: September 2021
Abstract:
Groundwater is a critical resource for supporting human consumption, stock water, agricultural use, and mineral or energy extraction as well as the environment. However, the quality of groundwater varies enormously from potable to hyper-saline, parti...
Petroleum Source Rocks, Generation and Primary Migration: insights using new direct nano-scale Tof-Sims SEM analysis and Re-Os radiometric dating
- Publication Name: AEGC 2021
- Authors: Greg Smith, William Rickard, Zhen Li, Svetlana Tessalina
- Date Published: September 2021
Abstract:
Exactly how maturation, generation and primary migration in and from source rocks works at the nano-scale remains largely a mystery. The theories and concepts rely mostly on destructive analytical techniques that by their nature do not allow direct o...
Why we should not report unconstrained inversion output in densities or magnetic susceptibilities
- Publication Name: AEGC 2021
- Authors: Clive Foss, James Austin
- Date Published: September 2021
Abstract:
Unconstrained gravity and magnetic inversions are too readily accepted as justified representations of the ground structure. Reliable estimates from unconstrained inversions are mostly restricted to discrete anomalies which can be reasonably separate...
Estimation of Magnetization Direction over Wide Sheets Illustrated with a Case Study of the Earoo Magnetic Anomaly, Western Australia
- Publication Name: AEGC 2021
- Authors: Clive Foss, Phil Schmidt, James Austin
- Date Published: September 2021
Abstract:
Single profile analysis across locally planar structures such as the edges of a wide sheet cannot resolve the 3D magnetization vector but we show that from two or more profiles across differently trending edges the magnetization is uniquely defined a...
If you can’t go to the Anomaly then let the Anomaly come to you – Rubens Cage Surveys
- Publication Name: AEGC 2021
- Authors: Clive Foss, Keith Leslie, Phil Schmidt
- Date Published: September 2021
Abstract:
We use small-scale surveys in a three-axis, uniform field generating coil set (a Rubens cage) to emulate the Black Hill Norite magnetic field anomaly in South Australia. We then run further surveys with the source rotated to provide a vertical magnet...
Airborne geophysical surveys uploaded to SARIG in 2020: Industry focus
- Publication Name: AEGC 2021
- Authors: Philip Heath
- Date Published: September 2021
Abstract:
The Covid-19 pandemic has given the geophysicists at the Geological Survey of South Australia the opportunity to revisit historical geophysical data that had not yet been uploaded onto the South Australian geoserver web portal: SARIG (South Australia...
Stratigraphic drilling in the era of EFTF: The Barnicarndy 1 and NDI Carrara 1 wells
- Publication Name: AEGC 2021
- Authors: Adam H.E. Bailey, Emmanuelle Grosjean, Liuqi Wang, et al.
- Date Published: September 2021
Abstract:
Exploring for the Future (EFTF) is an Australian Government initiative that gathers new data and information about potential mineral, energy and groundwater resources. Commencing in 2016 with a focus on northern Australia, an EFTF extension to 2024 w...
The present-day state of tectonic stress in eastern Australia
- Publication Name: AEGC 2021
- Authors: Mojtaba Rajabi
- Date Published: September 2021
Abstract:
Knowledge of the present-day stress is important to understand the dynamics of earthquakes, and to manage the safe and sustainable usage of the underground during storage and exploitation. Eastern Australia hosts several sedimentary basins with large...
Application of Facies Based Seismic Inversion in Developing Shallow Gas Fields in Cooper-Eromanga Basin
- Publication Name: AEGC 2021
- Authors: Satyabrata Mishra, Shane Squire, Thomas Massey
- Date Published: September 2021
Abstract:
This paper presents a case-study of the application of facies-based seismic inversion in the Cooper-Eromanga Basin, South Australia. The technique has been used to support the development of shallow gas fields in the Cretaceous reservoirs of the Coor...
Australian Proterozoic Thermal Aureole Gold Mineral Systems: the Critical Role of High Crustal Geothermal Gradients and the Insights of Vic Wall
- Publication Name: AEGC 2021
- Authors: Lesley Wyborn
- Date Published: September 2021
Abstract:
Thirty years ago, Wall (1990) proposed the name ‘Thermal Aureole Gold (TAG)’ for a distinctive class of plutonrelated gold deposits (now more commonly known as Intrusion-related Gold (IRG)). Initially based on the Pine Creek, Tanami and Paterson ...
Northern Lawn Hill Platform – modelling the ‘great-grandparent’ emerging region
- Publication Name: AEGC 2021
- Authors: Tehani Palu, Amber Jarrett, Susannah MacFarlane, Christopher Boreham, Barry Bradshaw
- Date Published: September 2021
Abstract:
The northern Lawn Hill Platform (nLHP) of the Isa Superbasin, far northwest Queensland is currently considered an emerging region and is an area of renewed interest for unconventional gas. Petroleum systems analysis presented here will improve the un...
Nonlinear, 2D uncertainty estimation in Magnetotelluric inversion using trans-dimensional Gaussian processes
- Publication Name: AEGC 2021
- Authors: Daniel Blatter, Anandaroop Ray, Kerry Key
- Date Published: September 2021
Abstract:
Bayesian inversion of Magnetotelluric (MT) data produces crucial uncertainty information on inferred subsurface resistivity. Due to their high computational cost, however, Bayesian inverse methods have largely been restricted to 1D resistivity models...