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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...
Ground Penetrating Radar Investigation as Part of a Multidisciplinary Archaeological Project, The Plain of Jars, Lao PDR.
- Publication Name: AEGC 2021
- Authors: Jamie Speer, Dr. Dougald O’Reilly, Dr. Louise Shewan
- Date Published: September 2021
Abstract:
The Ground Penetrating Radar (GPR) investigation was undertaken within the multidisciplinary team undertaking the “Plain of Jars Archaeological Research Project”, a joint Lao-Australian project funded by the Australian Research Council. The inter...
Simultaneous inversion of teleseismic P- and converted S-waves to constrain the seismic structure of the crust
- Publication Name: AEGC 2021
- Authors: Mehdi Tork Qashqai, Erdinc Saygin
- Date Published: September 2021
Abstract:
Traveltimes of P and mode-converted S-waves and their reverberations place a tight constraint on the Vp/Vs ratio and their amplitude ratio provides tight bounds on the P and S wave velocity jumps across the main discontinuities in the subsurface stru...
Modelling fluid flow in complex 3D fault networks
- Publication Name: AEGC 2021
- Authors: Thomas Poulet, Ulrich Kelka, Vincent Crombez, Marcus Kunzmann, Teagan Blaikie, Heather Sheldon, Martin Lesueur
- Date Published: September 2021
Abstract:
Faults play a critical role in controlling the movement of mineralising fluids and the resulting formation of mineral deposits. Numerical models are useful for understanding fluid pathways through faults and their host rocks. However, the heterogeneo...
PERMEABILITY MODELLING USING DIGITAL ROCK IMAGES FROM MICRON SCALE
- Publication Name: AEGC 2021
- Authors: Lionel Esteban, Mojtaba Seyyedi, White Cameron, Giwelli Ausama, Valeriya Shulakova, Marina Pervukhina, Sam Jackson, Joel Sarout, Amir Aryana, Yoshitake Kato, Mai Shimokawara, Ryuta Kitamura, Fei Jiang, Takeshi Tsuji, Tatsunori Ikeda, Maxim Lebedev
- Date Published: September 2021
Abstract:
Recent technology improvements allow gaining a digital 3D replica of natural rock using fast and non-destructive tomographic techniques. Combining core-scale images from medical X-Ray with micron resolution images from micro CT scanners, natural rock...
Robust 3D models of geochemical and petrophysical properties from combining borehole and seismic reflection data: A case study from the Tropicana Gold Mine
- Publication Name: AEGC 2021
- Authors: Duy Thong Kieu, Anton Kepic, Jai Kinkela, Ockert Terblanche, Stephen Brown
- Date Published: September 2021
Abstract:
The creation of 3D models of ore zones and geotechnical properties is typically performed by the interpolation of borehole data. Kriging and other interpolation methods have serious sampling issues, including bias from borehole orientation. Interpola...
Seismic inversion by hybrid machine learning
- Publication Name: AEGC 2021
- Authors: Yuqing Chen, Erdinc Saygin
- Date Published: September 2021
Abstract:
Full waveform inversion (FWI) has been widely used for recovering a high-resolution subsurface structure from the entire content of measured seismic data. However, FWI requires a good starting model which needs to be close to the true model. If it is...
AusArray: uncovering major crustal features using passive seismic data
- Publication Name: AEGC 2021
- Authors: Alexei Gorbatov, Andrew Medlin, Michael P. Doublier, Karol Czarnota, Tanya Fomin, Paul Henson, Brian L.N. Kennett
- Date Published: September 2021
Abstract:
It is generally accepted that improvements in mineral exploration are required to meet the rising demand for minerals associated with a transition to lower carbon energy sources. There is growing consensus in mineral exploration that the distribution...
Calibrating BMR T2 Distribution logs to well test data
- Publication Name: AEGC 2021
- Authors: Keelan O’Neill, Mario Reyes, Benjamin Birt, Timothy Hopper
- Date Published: September 2021
Abstract:
Sustainable groundwater management plans are of critical importance to the future of increasingly scarce water resources. Borehole magnetic resonance (BMR) is a wireline logging technique used to provide in-situ formation evaluation. BMR can be utili...
drillGEO: Designing a Magnetic Resonance Logging-While-Drilling Tool for Minerals Exploration
- Publication Name: AEGC 2021
- Authors: Keelan O’Neill, Sravani Mukkisa, Michael Johns, Timothy Hopper
- Date Published: September 2021
Abstract:
drillGEO is a magnetic resonance (MR) logging-whilstdrilling (LWD) tool targeted at the minerals exploration industry. drillGEO allows real-time geological assessment during reverse-circulation (RC) drilling. Magnetic resonance logging captures the p...
In-situ stress pattern along the Jellinbah Fold Thrust Belt in the Bowen Basin, Australia
- Publication Name: AEGC 2021
- Authors: Saswata Mukherjee, Mojtaba Rajabi, Joan Esterle, Renate Sliwa
- Date Published: September 2021
Abstract:
The Permo-Triassic Bowen Basin hosts numerous thick coal seams, and it is a prolific basin for coal mining and gas production. The development of coal seam gas (CSG) reservoirs in different parts of the Bowen Basin emphasizes the potentiality of the ...
Next-generation velocity model of the Australian crust from synchronous and asynchronous ambient noise imaging
- Publication Name: AEGC 2021
- Authors: Yunfeng Chen, Erdinc Saygin
- Date Published: September 2021
Abstract:
The proliferation of seismic networks in Australia has laid the groundwork for improved probing of the continental crust. In this study, we develop a new crustal model of the Australian continent using a large dataset that consists of nearly 30 years...
Lithospheric-scale magnetotellurics over the Eastern Goldfields Superterrane, Yilgarn Craton
- Publication Name: AEGC 2021
- Authors: Kate Selway, Mike Dentith, Klaus Gessner
- Date Published: September 2021
Abstract:
Long-period magnetotelluric (MT) data were collected in the Yilgarn Craton, Western Australia, in a ~200 x 250 km grid that crosses parts of the heavily mineralised Eastern Goldfields Superterrane and parts of the adjacent, less mineralised Youanmi T...
The uplift history of the Kidson Sub-Basin
- Publication Name: AECG 2021
- Authors: George Marfo, Stuart R. Clark, Tehani Palu
- Date Published: September 2021
Abstract:
The Canning Basin, onshore Western Australia, is highly prospective for conventional and unconventional hydrocarbons, as well as Uranium and sediment-hosted base metal deposits. The basin has evolved since the Early Ordovician undergoing both extensi...
Inversion-based automatic processing of AEM data
- Publication Name: AECG 2021
- Authors: Gianluca Fiandaca
- Date Published: September 2021
Abstract:
Data processing is a mandatory step before inversion for any geophysical inversion, because data outliers significantly affect the inversion process, often forbidding to reach reasonable inversion models and misfits. In the processing of Airborne Ele...
Inversion of Airborne IP data with a multi-mesh approach for parameter definition
- Publication Name: AEGC 2021
- Authors: Gianluca Fiandaca, Andrea Viezzol
- Date Published: September 2021
Abstract:
The interest on Induced Polarization in AEM data (AIP) has significantly increased in recent years, both within the research community and in the industry. However, the inversion of AIP data is particularly ill-posed, especially when spectral modelli...
Geochemical signatures and critical metal contents of key deposit types in the Mount Isa Province, Queensland, Australia
- Publication Name: AEGC 2021
- Authors: Vladimir Lisitsin, Courteney Dhnaram, Matthew Valetich
- Date Published: September 2021
Abstract:
Geological Survey of Queensland undertook a program of geochemical and mineralogical characterisation of key deposit types in the Mount Isa Province in Queensland, Australia. The main objectives of the study included: (1) identification of complete m...
Complex recharge mechanisms creating contradictory tracer signals in a large karst aquifer in northern Australia elucidated by a multi-tracer study
- Publication Name: AEGC 2021
- Authors: Axel Suckow, Alec Deslandes, Christoph Gerber, Cornelia Wilske, Sebastien Lamontagne, Yang Guo-Min, Jiang Wei
- Date Published: September 2021
Abstract:
The up to 300m thick Cambrian Limestone Aquifer in northern Australia extends over different climatic zones from the dry savanna to the tropics and is karstified. This hydrologically challenging system was studied using multiple environmental tracer ...
Post-rift magmatism on the continental shelf of the Otway Basin and implications for the igneous plumbing systems in sedimentary basins
- Publication Name: AEGC 2021
- Authors: Yakufu Niyazi, Mark Warne, Daniel Ierodiaconou
- Date Published: September 2021
Abstract:
Various types of igneous rocks have been frequently encountered during hydrocarbon exploration of sedimentary basins along rifted passive margins, and their impacts on hydrocarbon maturation and migration processes are diverse. Buried volcanoes gener...
Spatio-temporal distribution of igneous rocks and seismic facies analysis of buried volcanoes of the Prawn Platform, offshore Otway Basin
- Publication Name: AEGC 2021
- Authors: Yakufu Niyazi, Ovie Emmanuel Eruteya, Mark Warne, Daniel Ierodiaconou
- Date Published: September 2021
Abstract:
Volcanic rocks occur in different types of sedimentary basins, especially those evolving from lithospheric stretching. While volcanoes and other igneous rocks are widespread in the onshore Otway Basin, well-preserved volcanoes have not been documente...
Using modern downhole EM to discover high-grade, narrow vein lodes in a historical gold field, Bellevue Gold Project, Western Australia
- Publication Name: AEGC 2021
- Authors: Anne Tomlinson, Greg Maude
- Date Published: September 2021
Abstract:
With the recommencement of exploration in 2017 by Bellevue Gold Limited at the historical Bellevue Gold Mine in the Agnew-Wiluna greenstone belt, a review of the historical geophysical datasets was undertaken. This included remodelling of downhole EM...
Investigation of old pollution site along the Swan River, Perth, Western Australia using Loupe TEM system
- Publication Name: AEGC 2021
- Authors: Michael A. Hatch, Greg Street, Gavan McGrath, Aaron Davis, Andrew Duncan
- Date Published: September 2021
Abstract:
In this study, data were collected using a new transient-electromagnetic system over an area in Perth, Western Australia, along the Swan River. The site was polluted by industry in the 1960’s and 1970’s, and then remediated by agencies working fo...
Constraining regional-scale groundwater transport predictions using multiple geophysical techniques
- Publication Name: AEGC 2021
- Authors: Chris Li, Rebecca Doble, Michael Hatch, Graham Heinson, Ben Kay
- Date Published: September 2021
Abstract:
Due to often spatially discontinuous and sparse datasets from traditional geohydrological techniques, it is becoming more common to incorporate geophysical data in groundwater models. Not only are the geophysical data sets more continuous, but they c...
Reversible Jump Sequential Monte Carlo for Model Inference in Airborne Induced Polarisation
- Publication Name: AEGC 2021
- Authors: Laurence Davies, Christopher Drovandi, Matthew Sutton, Alan Yusen Ley-Cooper
- Date Published: September 2021
Abstract:
Exact methods of Bayesian model selection require exhaustive computation of normalising constants or sampling of the joint posterior of parameters and models via reversible jump Markov chain Monte Carlo (RJMCMC). Until recently, the latter has been f...