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Ultrasonic wave velocities measurements and seismic anisotropy at Karari gold deposit: Implications for gold exploration
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Andre Eduardo C.M. de Souza*, Stephanie Vialle, Andrej Bona
- Date Published: September 2019
Abstract:
In order to understand the nature of reflections imaged by reflection seismic data in hard-rock environment and to investigate the seismic anisotropy across the Karari gold deposit, ultrasonic velocity measurement and seismic anisotropy studies were ...
Pilgangoora Lithium-Tantalum Project: deposit geology and new constraints on rare-metal pegmatite genesis
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: J.S. Holmes*, J.L. Grigson
- Date Published: September 2019
Abstract:
The Pilgangoora lithium-tantalum project encompasses a globally significant Li-Ta pegmatite district which formed in the late-Mesoarchaean, along the western margin of the East Pilbara Terrane in Western Australia. Regional field mapping, coupled wit...
Overly steep decays in airborne TEM data and their link to chargeability: example from the Howards East District, NT, Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Klara Steklova*, Ken Lawrie, Esben Auken, Anders V. Christiansen, Gianluca Fiandaca
- Date Published: September 2019
Abstract:
The induced polarization (IP) response in airborne electromagnetic data has recently received attention due to its potential significance for mineral exploration and environmental applications, while also holding the prospect of improved geophysical ...
Carbonate reservoir development in the Canning Basin, Western Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Moyra E.J. Wilson*, Samantha Dykmans, Umair Mumtaz, Rashid Saleem, Iain Copp, Lionel Esteban, June Then, Zahra Seyedmehdi
- Date Published: September 2019
Abstract:
We present a multidisciplinary study investigating depositional and diagenetic impacts on pore system variability in carbonate systems from the Canning Basin. With some of Australia’s only known commercially viable carbonate reservoirs the Canning ...
Magnetotelluric inversion strategies
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Ralf Schaa*, Brett Harris, Andrew Pethick
- Date Published: September 2019
Abstract:
Regional scale geophysical data is widely and publicly available in many countries. Traditionally, these data include transects that span many hundreds of line kilometres. More recently it was recognised that imaging deep three dimensional crustal st...
In-Situ Laboratory for CO2 controlled-release experiments and monitoring in a fault zone in Western Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Karsten Michael, Arsham Avijegon, Ludovic Ricard*, Matt Myers, Konstantin Tertyshnikov, Roman Pevzner, Julian Strand, Barry Freifeld, Mark Woitt, Marina Pervukhina, Andrew Feitz, Bobby Pejcic, Linda Stalker, Brett Harris, Jo Myers, Alf Larcher, Praveen Rachakonda, Laurent Langhi, Tess Dance, Allison Hortle, Jennifer Roberts, Martijn Woltering, Cameron White, Claudio Delle Piane
- Date Published: September 2019
Abstract:
The In-Situ Laboratory Project (In-situ Lab) entails a configuration of wells at approximately 400 m depth for monitoring the controlled release of CO2 in a fault zone at the South West Hub CCS Flagship project in Western Australia. The pr...
Machine assisted drillhole interpretation of iron ore resource evaluation holes in the Pilbara
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Daniel Wedge*, Owen Hartley, Andrew McMickan, Eun-Jung Holden, Thomas Green
- Date Published: September 2019
Abstract:
In minerals exploration, routine drilling is performed and the data logged from these drillholes, including lithological composition, assays, and downhole geophysical measurements such as natural gamma logs, are used to create geological interpretati...
The Paleozoic prospectivity of the Offshore Canning area, Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Said Amiribesheli*, Andrew Weller
- Date Published: September 2019
Abstract:
The recent oil, gas and condensate discoveries in the Bedout Sub-basin have triggered a change in thinking in this hitherto underexplored region. Recent drilling at Phoenix South-1 (2014), Roc-1 (2015) and Dorado-1 (2018) all found success within the...
Using zircon geochemistry to map alteration in the Gawler Craton, South Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Adrienne Brotodewo*, Caroline Tiddy, Diana Plavsa, Adrian Fabris
- Date Published: September 2019
Abstract:
Zircon is a refractory mineral that is able to crystallize within hydrothermal, igneous and metamorphic environments, resulting in extreme variability in its external morphology, internal textures and chemistry. The chemistry of zircon is sensitive t...
Driving the paradigm shift of near surface exploration geochemistry using ultrafine soils
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Ryan Noble, Ian Lau, Tenten Pinchand, Ravi Anand, Paul Morris
- Date Published: September 2019
Abstract:
Soils are widely used as a geochemical sample medium. These samples are sieved to <250 µm or <180 µm to remove larger gravels and coarse sand and later pulverized for analysis, but no other refinement is commonly used. Why is this the case? In tran...
Maximising value from seismic using new data and information management technologies
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Jess B. Kozman*, Matthew Holsgrove
- Date Published: September 2019
Abstract:
Geophysical data is one of the key decision support factors for successful discovery of hydrocarbons, and operators have multi-decadal inventories of survey data in key basins. Woodside has a history of exploration in Australia from 1954 and seismic ...
Analysis of Geophysical Datasets for Coastal Vulnerability and Asset Management
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Peter Eccleston, Andrew Spyrou
- Date Published: September 2019
Abstract:
As part of Western Australia’s State and Coastal Planning Policies, local councils are formulating Coastal Hazard Risk Management and Adaptation Plans (CHRMAP) with the aim of rating areas of concern with a risk level and to assist in future planni...
Rift initiation on Australia’s southern margin: insights from the Bremer Sub-basin
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Jane Cunneen, Amanda Buckingham, Cecilia D’Ercole
- Date Published: September 2019
Abstract:
The Bremer Sub-basin occupies a unique position on Australia’s south-west margin. It is influenced by two rift events associated with the breakup of Gondwana: rifting along Australia’s western margin in the Early Cretaceous as well as the souther...
Application of multi-element geochemistry in the weathered environment: Controls, considerations and implications for exploration
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Fiona Best, Matthew Readford, Kristina Walcott
- Date Published: September 2019
Abstract:
Understanding the mobility of individual elements in the oxidised environment is important for the accurate interpretation of geochemical data from regolith and weathered bedrock samples. In the weathered environment, immobile element geochemistry ca...
Eromanga oil traps – a multi field post-mortem
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Keith Martens*
- Date Published: September 2019
Abstract:
The purpose of this paper is to examine the remaining oil potential of the Eromanga Basin, specifically in the Cooper region....
Geology of Australian ore deposits
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: G Neil Phillips*, Kristy Burt
- Date Published: September 2019
Abstract:
The Australian Ore Deposits monograph, published recently by The Australasian Institute of Mining and Metallurgy, has its focus on descriptive summaries of ore deposit geology. These summaries are expected to be long-lasting compilations with value w...
Resistivity structure of the Link East MT transect in the Southern Curnamona Province
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Ben Kay*, Kate Robertson, Stephan Thiel, Graham Heinson
- Date Published: September 2019
Abstract:
We present results of 18 magnetotelluric (MT) stations from the Link East transect adjacent to the 03GA-CU1 Curnamona deep crustal seismic reflection line in the southern Curnamona Province, South Australia. The transect was designed to provide resis...
Dude, where’s my AVO? A case study from the Browse Basin, North West Shelf, Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Said Amiribesheli*, Jordan McGlew, Joshua Thorp
- Date Published: September 2019
Abstract:
The Braveheart-1/ST1 well (2009) was drilled on a pronounced Class III AVO anomaly identified on the Braveheart 2D and Braveheart infill 2D seismic data in the Browse Basin, Australia. The well was dry with no indication of hydrocarbons. During a pos...
Smart stitching: adding lateral priors to ensemble inversions as a post-processing step
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Gerhard Visser*
- Date Published: September 2019
Abstract:
The last decade has seen extensive development of Bayesian geophysical inversion methods which produce ensembles of models as outputs. Many of these are limited to producing 1D or very simple and narrow models. It is well established that tying such ...
Determining petrophysical and hydrogeological parameters from historical bore logs for the Leederville-Parmelia aquifer, northern Perth Basin, using regression methods
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Olga Filiptsova*, Sheryl Ryan
- Date Published: September 2019
Abstract:
A new workflow of bore data re-interpretation that increases the value of old data with only a minimal cost has been developed. The workflow estimates hydraulic and petrophysical parameters from historical bore data, providing clay volume, total poro...
MT conductivity signatures of mineral systems: 3D MT over the Eastern Goldfields Super Terrane, Yilgarn Craton
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Kate Selway, Mike Dentith, Sinan Özaydın
- Date Published: September 2019
Abstract:
Magnetotellurics (MT) is emerging as a key tool for understanding giant mineral systems. For MT to be effective in mineral exploration we require both an improved understanding of the causes of electrical conductivity anomalies and an increased numbe...
Feasibility of the quantitative time-lapse seismic characterisation of a heterogeneous CO2 injection
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Roman Isaenkov, Stanislav Glubokovskikh, Boris Gurevich
- Date Published: September 2019
Abstract:
CO2 injection into clastic brine-saturated reservoirs leads to a detectable reduction of the elastic moduli of the reservoir rocks. However, quantitative interpretation of the time-lapse seismic anomalies obtained for CO2 storag...
“Is it pyrite, or a shed?”: intricacies of induced polarisation surveying near grounded metallic infrastructure
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Regis Neroni*, Sam Corbett
- Date Published: September 2019
Abstract:
Metallic grounded infrastructure commonly found in built-up areas such as fences, sheds and various dwellings, can produce induced polarisation anomalies often indistinguishable from bedrock responses typically targeted by base and precious metals ex...
Bayesian geophysical inversion with Gaussian process machine learning and trans-D Markov chain Monte Carlo
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Anandaroop Ray*, David Myer
- Date Published: September 2019
Abstract:
A key aspect of geophysical inversion is the ability to model the earth with a low dimensional representation. There exist various approaches to solve the inverse problem. However, most methods do not automatically adapt inverse model complexity or t...
Fraccing onshore Australia 2019
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Max Williamson*
- Date Published: September 2019
Abstract:
Australia is at last seeing common-sense with some of its key politicians at State level moving to remove barriers to the use of fraccing as an exploration and production technique. The most recent and politically important have been the decisions of...
Which anomaly should I drill? Using spatial statistics to inform exploration in covered IOCG terranes
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Laszlo Katona*, Adrian Fabris
- Date Published: September 2019
Abstract:
This contribution presents a method for efficiently classifying geophysical anomalies and identifying regions and features that share characteristics of many known iron-oxide-copper-gold (IOCG) deposits of the Gawler Craton, and can therefore be used...
Geological investigations with high spatial resolution WV-3 satellite imagery and regional geophysics at the Haib Cu porphyry, Namibia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: R.D. Hewson*, E. Chinkaka, M. van der Meijde, B. Baugh, N. Titus, J.P. Mubita
- Date Published: September 2019
Abstract:
Recent improvements in available multi-spectral satellite-borne shortwave infrared sensors and their spatial resolution opens up the opportunity for furthering surface mineralogy mapping. Their image interpretation can be augmented with regional geop...
Using finite dipole lengths in complete earth 3D MT modelling
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Wolfgang Soyer, Federico Miorelli, Randall Mackie
- Date Published: September 2019
Abstract:
We have quantified the use of finite electric dipole lengths from the point measurement assumptions typical in 3D MT inversion modeling. Electric fields are measured across dipoles of typically 50 m to 200 m at MT soundings. Modeling algorithms, howe...
Learnings from the Gawler Craton airborne survey quality control
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Matthew Hutchens
- Date Published: September 2019
Abstract:
The Geological Survey of South Australia (GSSA) designed the Gawler Craton Airborne Survey (GCAS) to provide high resolution magnetic, gamma-ray and elevation data covering the northern portion of the Gawler Craton. In total, 1.66 million line km wer...
3D interpretation of geological, 3D seismic and conventional geophysical data from the Darlot Gold Mine
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Glenn Pears, James Reid*, John McGaughey, Will Turner, Graeme Hird
- Date Published: September 2019
Abstract:
The Darlot gold mine is an Archean orogenic deposit located in the world-class gold and nickel terrain of the Yandal granite-greenstone belt, part of the Yilgarn Craton in Western Australia....