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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...
Estimate elastic moduli of arenites from micro-tomographic images with digital rock physics
- Publication Name: AEGC 2021
- Authors: Jiabin Liang, Boris Gurevich, Maxim Lebedev, Stephanie Vialle, Alexey Yurikov, Stanislav Glubokovskikh
- Date Published: September 2021
Abstract:
Numerical computation from high resolution 3D microtomographic (micro-CT) images of rocks (known as digital rock physics) has the potential to predict elastic properties more accurately. However, successful examples are limited to samples with simple...
New mineral system vectors for revitalised copper-gold discovery in the Gawler Craton
- Publication Name: AEGC 2021
- Authors: John Anderson
- Date Published: September 2021
Abstract:
Combination of a new strato-tectonic model for the Olympic Metallogenic Event (OME) and a zircon-based geochemical tool offers a significant step-change for ore target vectoring for a spectrum of IOCG and coeval copper-gold deposit styles in the Gawl...
Seismic network modelling and design in an interactive web-based environment
- Publication Name: AEGC 2021
- Authors: Pavel Golodoniuc, Januka Attanayake, Abraham Jones, Samuel Bradley
- Date Published: September 2021
Abstract:
To detect and locate earthquakes effectively and accurately, seismologists must design and install a network of seismometers that can capture small seismic signals originating in the sub-surface. A major challenge when deploying an array of seismomet...
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...
Helicopter Airborne Electromagnetics at 12.5 Hz – Western Australia Case studies
- Publication Name: AEGC 2021
- Authors: Adam Smiarowski
- Date Published: September 2021
Abstract:
Low base frequency EM provides an advantage to detection of very conductive targets or for exploration with thick conductive cover. A comparison of a 30 Hz and 7.5 Hz system showed significantly better detection to a conductive body at 400 m depth. 1...
Landscape and Pattern Similarity Analysis for gold exploration
- Publication Name: AEGC 2021
- Authors: González-Álvarez, Rondón-González, Ibrahimi, Lau et al.
- Date Published: September 2021
Abstract:
Covers geochemical landscape evolution and Pattern Similarity Analysis at tenement scale for gold exploration in Forrestania. The present study investigates the Forrestania area, located in the Yilgarn Craton, Western Australia, as a case study to co...
Petroleum systems model for source-rock-reservoir evaluation in the Beetaloo Sub-basin
- Publication Name: AEGC 2021
- Authors: Mohinudeen Faiz, Vincent Crombez, Claudio Delle Piane
- Date Published: September 2021
Abstract:
The Beetaloo Sub-basin comprises one of the oldest petroleum systems in the world with the Middle Velkerri and Lower Kyalla shales considered as key unconventional source-rock-reservoir targets. The basin is relatively under-explored with only few we...
Data geo-Science Approach for Modelling Unconventional Petroleum Ecosystems and their Visual Analytics
- Publication Name: AEGC 2021
- Authors: Shastri L Nimmagadda, Andrew Ochan, Christine Namugenyi, Torsten Reiners
- Date Published: September 2021
Abstract:
Storage, integration and interoperability are critical challenges in the unconventional exploration data management. With a quest to explore unconventional hydrocarbons, in particular, shale gas from fractured-shales, we aim at investigating new petr...
Optimising slip-sweep for high-productivity Vibroseis coal surveys
- Publication Name: AEGC 2021
- Authors: Shaun Strong, Dale Harpley, Steve Hearn
- Date Published: September 2021
Abstract:
The increased scale of 3D seismic surveys in the Australian Coal industry has necessitated the use of high-production slip-sweep surveys. A method is provided which provides a quantitative visualisation of harmonic noise expected for different slip p...
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...
Gaining value from historical AEM data
- Publication Name: AEGC 2021
- Authors: Shane Mulè, Tim Munday
- Date Published: September 2021
Abstract:
Australia is covered with a significant number of AEM surveys, primarily acquired over the last three decades. Most of these data were collected with now obsolete systems or system variants. Unfortunately, many of these historical datasets contain un...
Inferring geological features masked by artefacts in core photography using neural networks
- Publication Name: AEGC 2021
- Authors: Yasin Dagasan, Harvey Nguyen, Mark Grujic
- Date Published: September 2021
Abstract:
The application of computer-vision technologies to geological datasets has previously been shown to objectively verify existing datasets (e.g., automated calculation of geotechnical parameters) as well as the creation of new datasets (e.g., fracture ...
A time-lapse feasibility workflow incorporating core calibrated 4D rock physics models
- Publication Name: AEGC 2021
- Authors: Christian Proud, Ask Frode Jakobsen, Rob Ross, Jason McKenna
- Date Published: September 2021
Abstract:
Rock physics analysis is a useful tool in time-lapse seismic feasibility studies and can help to assess the effect of pressure and saturation changes on the elastic parameters which the seismic data is sampling. Calibration using velocity measurement...
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...
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...
Targeting Fractured Rock Aquifers using Magnetic Data
- Publication Name: AEGC 2021
- Authors: Heather Ballantyne, Karen Gilgallon, Sharon Lowe
- Date Published: September 2021
Abstract:
Fractured Rock Aquifers are an important source of water with approximately 40% of groundwater in Australia present in fractured rock. The water extracted from fractured rock aquifers is utilised in mining, irrigation, town water supply and stock wat...
Constraining gravity inversion with lower-dimensional seismic information: Imaging the eastern Yilgarn Craton
- Publication Name: AEGC 2021
- Authors: Mahtab Rashidifard, Jérémie Giraud, Mark Lindsay, Mark Jessell, Vitaliy Ogarko
- Date Published: September 2021
Abstract:
Integrating complementary geophysical datasets has proven to be a powerful tool for constraining the subsurface properties and also generating a model compatible with available datasets. As different geophysical surveys are designed with specific tar...
A Beautiful Sunset (Clause): Enhancing Statewide Geophysics with High Resolution Company Data
- Publication Name: AEGC 2021
- Authors: Sam Matthews
- Date Published: September 2021
Abstract:
The Geological Survey of NSW (GSNSW) is the custodian of both government and company geophysical data for NSW. In 2020 GSNSW committed to delivering an updated statewide magnetic merge combining government and open file company geophysical data, at a...
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...
Mineral systems and data integration as part of the foundation for the future of mineral exploration
- Publication Name: AEGC 2021
- Authors: Sandra Occhipinti, Vasek Metelka, Hassan Talebi, Dave Cole, Alex Otto
- Date Published: September 2021
Abstract:
As exploration focuses on defining new resources under large Phanerozoic basins and thick unconsolidated cover generic exploration models, following a mineral systems approach will be vital to future exploration programs. Specific ore deposit models ...
In situ zircon Hf-O isotopic constraints on the genesis of quartz diorite in Narusongduo Pb-Zn mining area, Tibet
- Publication Name: AEGC 2021
- Authors: Xuejing Gong, Qingtian Lü, Zhusen Yang
- Date Published: September 2021
Abstract:
Narusongduo Pb-Zn deposit is located in the southern margin of the middle Lhasa terrane. The characteristics of the magma source and genetic mechanism of the premetallogenic quartz diorite in the mining zone have not been well explained. The zircon o...
Big Data guided Digital Petroleum Ecosystems for Visual Analytics and Knowledge Management
- Publication Name: AEGC 2021
- Authors: Shastri L Nimmagadda, Andrew Ochan, Neel Mani, Torsten Reiners
- Date Published: September 2021
Abstract:
The North West Shelf (NWS) interpreted as a Total Petroleum System (TPS), is Super Westralian Basin with active onshore and offshore basins through which shelf, slope and deep-oceanic geological events are construed. In addition to their data associa...
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....
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...
Predicting fluid pathways in large discontinuity systems using graph theory
- Publication Name: AEGC 2021
- Authors: Ulrich Kelka Stefan Westerlund Thomas Poulet Luk Peeters
- Date Published: September 2021
Abstract:
Fracture networks and fault zones play an important role for subsurface fluid flow. Estimating the impact on the permeability field of such structures is of high interest for reservoir characterization, groundwater management, and exploration targeti...
Almost automatic geological mapping from AEM surveys
- Publication Name: AEGC 2021
- Authors: David Annetts, Juerg Hauser
- Date Published: September 2021
Abstract:
Interpretation of electromagnetic survey data for underlying geology is a common task that is complicated by the volume of data collected in airborne electromagnetic (AEM) surveys. We test a supervised learning approach for AEM data collected in the ...
Knowledge-Guided Machine Learning for Komatiite-Hosted Nickel Prospectivity Mapping
- Publication Name: AEGC 2021
- Authors: Minsu Kwon
- Date Published: September 2021
Abstract:
Thanks to the brilliant progress in machine learning, many research works have conducted data-driven mineral prospectivity mapping. However, it is challenging to integrate highly multidisciplinary geoscientific data with machine learning algorithms. ...
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 ...
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...