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Exploring for gold using radiometrics, magnetics, and petrophysical information in the Warrawoona greenstones of the East Pilbara, Western Australia
- Publication Name: AEGC 2021
- Authors: Yvonne Wallace, Heather Ballantyne, Steve Sheppard
- Date Published: September 2021
Abstract:
The Warrawoona Gold Project is located 25 kilometres southeast of Marble Bar in the East Pilbara region of Western Australia. Key prospects include the Klondyke deposit, which forms the main share of the 1.25 Moz gold resource owned by Calidus Resour...
Case Study from N.W. Carnarvon using WEB-AVO Inversion to Map Low Saturation Gas & Unravel Geology Using “Noisy” Seismic
- Publication Name: AEGC 2021
- Authors: John Coffin, Angie Kelsay, Shahid Ur Rehman
- Date Published: September 2021
Abstract:
This case study applies the next generation of seismic AVO inversion technology to a project in the NW Carnarvon Basin offshore Western Australia. The technology is called WEB-AVO (Wave Equation Based – AVO Inversion) and no longer considers the ea...
Onshore seismic acquisition: out with the old, in with the new
- Publication Name: AEGC 2021
- Authors: Denis Sweeney, Tim Dean, Claudio Strobbia, John Hughes, Martin Bayly
- Date Published: September 2021
Abstract:
The move from cable-based telemetry seismic acquisition systems with strings of wire-connected geophones to independent nodal, single sensor recording has been dramatic and is reflected by the plethora of nodal systems on offer and their increased us...
Integrated modelling of seismic velocities and impact on prospect evaluation
- Publication Name: AEGC 2021
- Authors: Jarrod Dunne, James Parsons
- Date Published: September 2021
Abstract:
It is often assumed that velocities associated with good quality seismic images can be directly used for time-to-depth conversion, pore-pressure prediction or even as a driver for seismic amplitude interpretation. However, such applications require s...
Examples of integrating hyperspectral, geochemical and petrophysical drill core data using Australia’s National Virtual Core Library infrastructure
- Publication Name: AEGC 2021
- Authors: Carsten Laukamp, Jessica Stromberg, Neil Francis, et al.
- Date Published: September 2021
Abstract:
Drill core analytical tools are used for objectively measuring geoscience parameters that aid mineral exploration or groundwater research. Multiple types of geoscience parameters are frequently compared alongside each other, but underlying physicoche...
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...
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...
Mapping coal seam roof and floor by using in-seam borehole radar: Results from numerical modelling
- Publication Name: AEGC 2021
- Authors: Binzhong Zhou, Jianjian Huo, Iain Mason, Matthew van de Werken
- Date Published: September 2021
Abstract:
Longwall automation depends on the development of automatic coal seam (horizon) tracking and lateral guidance systems to keep mining the target coal seam while steering to the desired target. While inertial sensing has provided some success for later...
Case Studies using Loupe – Mapping Geology in Near-Surface
- Publication Name: AEGC 2021
- Authors: Gregory Street, Andrew Duncan
- Date Published: September 2021
Abstract:
Surveys were conducted over five prospects in the southwest of Western Australia with aims of mapping, geology, sulphides, graphite and clay. The high resolution of the Loupe system lends itself to a role similar to ground magnetic data in mapping ge...
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 ...
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 ...
Rock Property and Depth Mapping from magnetic data applied to greenfields exploration targeting in the Cloncurry District
- Publication Name: AEGC 2021
- Authors: David Pratt, James Austin, Clive Foss
- Date Published: September 2021
Abstract:
A new method for building a model of the rock property distribution on an unconformity surface (Pratt et al., 2019) presents new opportunities for greenfield exploration in complex geological environments. The method uses the inherent 3D information ...
Groundwater and gas sampling informing hydrogeological conceptualisation of the Precipice and Hutton Sandstone aquifers of the southern Surat Basin
- Publication Name: AEGC 2021
- Authors: J. K. Pearce, H. Hofmann, K. Baublys, et al.
- Date Published: September 2021
Abstract:
The southern Surat Basin in Queensland, Australia, may be a prospective region for geological storage of CO2 within the Precipice Sandstone with the Evergreen Formation acting as a sealing cap-rock of the reservoir. The Hutton Sandstone, a major regi...
Detailed geophysical mapping and 3D geological modelling to support urban planning: A case study of Ny Rosborg, Denmark
- Publication Name: AEGC 2021
- Authors: Theis R. Andersen, Søren E. Poulsen, Anna B. Medhus
- Date Published: September 2021
Abstract:
At present, urbanisation is taking place. As cities expand, areas previously omitted due to construction risks are now being urbanised. These areas are typically characterised as those with unforeseen soil properties, unknown groundwater conditions a...
Application of LiDAR for hydrocarbon exploration in logistically and geologically challenging environments: examples from the Papuan Fold and Thrust Belt, Papua New Guinea
- Publication Name: AEGC 2021
- Authors: Luke Mahoney, Mitch Furnass, Pedro Restrepo-Pace
- Date Published: September 2021
Abstract:
The Papuan Fold and Thrust Belt (PFTB) in Papua New Guinea hosts the prolific Papuan Basin petroleum system yet remains underexplored compared with other fold and thrust belts worldwide. The underexplored nature of the PFTB results from its remotenes...
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...
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...
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...
Automated facies classification in borehole log data
- Publication Name: AEGC 2021
- Authors: Roman Beloborodov, James Gunning, et al.
- Date Published: September 2021
Abstract:
Seismic facies inversion relies on accurate facies-specific elastic parameter models determined from borehole log data. Typically, velocity depth trends and corresponding standard errors are manually determined for each of the facies by using cross-p...
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...
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...
Australian geomagnetic observatory network monitors space weather hazard – 180 years on
- Publication Name: AEGC 2021
- Authors: Liejun Wang, Andrew Lewis, Bill Jones, et al.
- Date Published: September 2021
Abstract:
Geoscience Australia’s geomagnetic observatory network covers one-eighth of the Earth. The first Australian geomagnetic observatory was established in 1840 in Hobart. This almost continuous 180-year period of magnetic-field monitoring provides an i...
Transformative geophysics: Alternatives to the reduction-to-pole transformation of magnetic data
- Publication Name: AEGC 2021
- Authors: Richard Smith
- Date Published: September 2021
Abstract:
Magnetic data is difficult to interpret due to the bipolar nature of the field and the fact that the amplitude and phase of the response varies depending on the inclination of the Earth’s field and the dip of magnetic bodies. The reduction to the p...
The Role of Passive Seismic Imaging in Near-Mine Exploration
- Publication Name: AEGC 2021
- Authors: Gerrit Olivier, Andrew Foley, Nicola Ramm, et al.
- Date Published: September 2021
Abstract:
The future of the mineral mining industry relies on the ongoing success of exploration projects. In this paper, the use of near-mine passive seismic imaging is discussed as a solution to exploration demands. We explore the issues currently being face...
Multi-purpose utility of constructing 3D static Geomechanical model in the Ichthys field, Browse Basin
- Publication Name: AEGC 2021
- Authors: Partha Pratim Mandal, Iman Essa, Sankhajit Saha, Reza Rezaee
- Date Published: September 2021
Abstract:
The petroleum industry progressed significantly to develop 3D/4D geomechanical models (GMs) to make efficient field development planning which reduces the uncertainty of 1D GM in the field scale. In this paper, we demonstrated how to build a high-res...
Gravimetric measurements of high pressure and temperature C1, C2 and C3 adsorption isotherms on Beetaloo Sub-basin shales
- Publication Name: AEGC 2021
- Authors: Nicholas Lupton, Michael Camilleri, Mohinudeen Faiz
- Date Published: September 2021
Abstract:
Exploration in Australia’s Beetaloo Sub-basin focuses on the liquids, wet-gas, and dry-gas mature shales of the Kyalla and Velkerri formations. Gas storage in these reservoirs occurs as free gas and additionally through adsorption to the internal p...
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...
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...
Expanding the reserve base of operating mines: Insights from an airborne MobileMT survey in the Omsukchan depression, Russian Far East
- Publication Name: AEGC 2021
- Authors: Petr Kordi, Alexander Prikhodko, Andrei Bagrianski, Sergei Trushin
- Date Published: September 2021
Abstract:
In the frame of expanding the reserve base for the Omsukchan mining district, an airborne electromagnetic survey was carried out over and around the Dukat silver giant. The initially developed exploration concept was based on weakly investigated deep...
MobileMT for porphyry exploration – model studies and field examples
- Publication Name: AEGC 2021
- Authors: Alexander Prikhodko, Andrei Bagrianski
- Date Published: September 2021
Abstract:
Resistivity methods are an important part of the arsenal of geophysical techniques for the exploration of porphyry-style mineralization. One of the geophysical techniques that could be used to detect the porphyry targets, or its attributes is MobileM...