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Deciphering the building blocks of the eastern North Australia Craton
- Publication Name: AEGC 2021
- Authors: Karen Connors, Janelle Simpson, Dominic Brown
- Date Published: September 2021
Abstract:
Interpretation of the nature and extent of basement rocks in many regions is hampered by lack of exposure and because potential field data tend to reflect the signatures of overlying upper crustal units, highlighting the need for tools that image dee...
Hidden in Plain Sight: The Bamaga Basin
- Publication Name: AEGC 2021
- Authors: Wolfgang Fischer
- Date Published: September 2021
Abstract:
The Gulf of Carpentaria was extensively explored in the 1970s and 1980s targeting the Carpentaria (Jurassic-Cretaceous) and Karumba (Tertiary) sag basins, the sediments of which show little or no structuring. This activity failed to recognise the pre...
Environmental Site Assessment at a Mining Operation in Western Australia Using the Loupe TEM Profiling System
- Publication Name: AEGC 2021
- Authors: Remke L. van Dam, Greg Maude, Brendan Ray, Graham Jenke, Russell Mortimer
- Date Published: September 2021
Abstract:
The Loupe TEM is a transient electromagnetic profiling system for efficient mapping of near-surface ground conductivity. The system is operated by a two-person crew who carry the transmitter coil and 3-component receiver coils on backpacks. Benefits ...
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...
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...
Subsurface characterisation using full waveform inversion of vertical seismic profile data: Example from the Curtin GeoLab well
- Publication Name: AEGC 2021
- Authors: S. Zulic, A. Bona, K. Tertyshnikov, A. Yurikov, R. Pevzner
- Date Published: September 2021
Abstract:
Full-waveform inversion (FWI) uses the complete seismic wavefield (transmitted, reflected and converted waves) to build the models of subsurface physical properties. We conducted a feasibility study of a 2D elastic FWI applied to the synthetic and fi...
Radio Image Mapping at the Polymetallic Rosebery Mine, NW Tasmania
- Publication Name: AEGC 2021
- Authors: Asbjorn Norlund Christensen, Jon McLoughlin, Roland Hill
- Date Published: September 2021
Abstract:
In 2019, MMG conducted a suite of thirteen deep crosshole Radio Image Mapping (RIM) tomographic surveys along the northern extension of the polymetallic Rosebery Mine in North-Western Tasmania. The RIM method is based on the attenuation of an electro...
Recognising the impact of uncertainty in resource models
- Publication Name: AEGC 2021
- Authors: Steve Sullivan
- Date Published: September 2021
Abstract:
The research aimed to test the variability of geological modelling due to the interpretation bias of the person building the model. Measuring this innate uncertainty in modelling allows stakeholders to have confidence in the models, knowing the level...
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 ...
The Delamerian Orogen- An overview of the resistivity structure across scales
- Publication Name: AEGC 2021
- Authors: Kate Robertson, Tom Wise, Stacey Curtis, Alison Kirkby, Stephan Thiel, Jingming Duan, Graham Heinson
- Date Published: September 2021
Abstract:
Here we present 3D and 2D resistivity models of the lithosphere beneath an area of southeast Australia, derived from the Australian Lithospheric Architecture Magnetotelluric Project (AusLAMP) and a subsequent infill broadband MT transect collected in...
UAV Magnetic Survey Planning, QAQC and Data Processing
- Publication Name: AEGC 2021
- Authors: Brett Adams, James Jensen, Brendan Ray
- Date Published: September 2021
Abstract:
UAVs have been deployed increasingly to collect magnetic data, however acquisition using these systems often lack QAQC checks that are typically expected from fixed-wing or helicopter-based acquisition. Furthermore, survey parameters such as line spa...
Results from the largest Airborne Electromagnetic (AEM) survey ever flown in NSW
- Publication Name: AEGC 2021
- Authors: Astrid Carlton, Liann Deyssing, et al.
- Date Published: September 2021
Abstract:
The Geological Survey of New South Wales (GSNSW) has mapped potential mineral and groundwater features, and the depth of intense weathering by interpreting a large airborne electromagnetic (AEM) dataset in Central NSW....
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...
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...
The Do-It-Yourself Geophysicist
- Publication Name: AEGC 2021
- Authors: Anton Kepic
- Date Published: September 2021
Abstract:
The proliferation of open software and hardware, such as Micropython and other GNU-based licensing of generic embedded computing platforms provides largely readymade data acquisition and data fusion platforms that allow many geophysicists to make the...
Digitalizing the Mining Industry – 3D Scanning of Core Trays to Produce Volumetric Bulk Densities
- Publication Name: AEGC 2021
- Authors: Mikael Artursson, Angus Tod, Emma Dellar, Annelie Lundström
- Date Published: September 2021
Abstract:
Geological drill core samples can be digitalized using the Minalyzer Core scanner. Data sets generated from this scanning include XRF geochemistry, high-resolution images, specific gravity, RQD, structural logging, and sample topography. While all th...
The evaluation of alternatives to pre-acquisition surveying for land seismic surveys
- Publication Name: AEGC 2021
- Authors: Tim Dean, Matt Grant
- Date Published: September 2021
Abstract:
Accurate positioning for sources and receivers is a fundamental requirement for land seismic survey acquisition. The introduction of ‘stake-less navigation’ systems, where the vibrator driver uses a GPS guided display to navigate into position, h...
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...
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...
Magnetic inversion constrained by probabilistic magnetotellurics models: methodology and application
- Publication Name: AEGC 2021
- Authors: J. Giraud, H. Seillé, V. Ogarko, G. Visser, M. Lindsay, M. Jessell
- Date Published: September 2021
Abstract:
We introduce a sequential inversion workflow where we integrate magnetotelluric and magnetic data. We first perform probabilistic MT inversions, from which we derive 2D or 3D probabilities of observing an interface between rock units of contrasting e...
How do detachment properties influence the kinematics of normal growth faults? Insights from 3D seismic reflection data from the Ceduna sub-basin
- Publication Name: AEGC 2021
- Authors: Monica Jimenez, Simon Holford, Rosalind King, Mark Bunch
- Date Published: September 2021
Abstract:
The growth of gravity-driven normal faults exerts a critical control on multiple elements and processes of the petroleum system. However, there is still a poor understanding of the interactions between the properties of detachment layers and the evol...
Integration of high-resolution HyLogger3 spectral scanner and TESCAN Integrated Mineral Analyser for mineralogical characterisation of shale
- Publication Name: AEGC 2021
- Authors: Muhammad Atif Iqbal, Reza Rezaee, Gregory Smith, Hasnain Ali Bangash
- Date Published: September 2021
Abstract:
The mineralogy of shales is a fundamental parameter because it directly influences petrophysical and geomechanical properties. However, thick shales comprise a heterogeneous succession of very fine-grained strata in which only some thin beds are opti...
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...
Maximising the value of high-definition 3D coal seismic data
- Publication Name: AEGC 2021
- Authors: Margarita Pavlova, Matt Grant, Tim Dean
- Date Published: September 2021
Abstract:
The acquisition of seismic data over coal mining leases in Queensland’s Bowen Basin first commenced over 30 years ago. Since then, coal seismic data has been predominantly utilised for structural interpretation, particularly fault delineation. In t...
Earthquake monitoring in the Southwest Seismic Zone, Western Australia
- Publication Name: AEGC 2021
- Authors: Ruth E Murdie, Lucy Brisbout, Hugh Glanville, Trevor Allen, Vic Dent
- Date Published: September 2021
Abstract:
The southwest Yilgarn Craton, in Western Australia is one of the most seismogenic areas of mainland Australia. There are many small earthquakes happening daily and the occasional larger earthquake such as the destructive Meckering (M6.6) earthquake o...
The North Australian Craton 3D Gravity and Magnetic Inversion Models – A trial for first pass modelling of the entire continent
- Publication Name: AEGC 2021
- Authors: James A Goodwin, Richard J L Lane
- Date Published: September 2021
Abstract:
As part of the Federal Government’s Exploring for the Future program, whole-of-crust 3D gravity and magnetic inversion models have been produced for an area encompassing the North Australia Craton (NAC). These models were created to aid 3D geologic...
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...
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 ...
An inventory of peralkaline rocks in Queensland for evaluation of REE enrichment potential
- Publication Name: AEGC 2021
- Authors: David Purdy, Bob Bultitude, Dominic Brown
- Date Published: September 2021
Abstract:
Highly fractionated peralkaline rocks are globally important sources of rare earth elements and other critical or new economy metals. Such metals are vital for technological advancement and a transition to a clean energy future and are therefore pred...
Quantifying Uplift using Decompaction: A case study from the Exmouth Plateau, North West Shelf
- Publication Name: AEGC 2021
- Authors: Patrick Makuluni, Laurent Langhi, Juerg Hauser, Stuart Clark
- Date Published: September 2021
Abstract:
Uplift events have caused the failure of hydrocarbon seals resulting from subsequent deformation and fault development or reactivation. On the other hand, escaping hydrocarbons from the breached seals may accumulate in new traps, and fracturing of br...