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The Foura Sandstone type section (Samaropollenites speciosus Zone, Carnian–early Norian; early Late Triassic), Timor-Leste: preliminary correlation between Timor and the Bonaparte Basin
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: D. Peyrot, M. Keep, J. Scibiorski, E. McCartain, P. Baillie, J. Soares, D.W. Haig, A.J. Mory
- Date Published: September 2019
Abstract:
The logging and biostratigraphic characterization of the Foura Sandstone type section, Timor-Leste, show it is Carnian–early Norian (Samaropollenites speciosus Zone). Sedimentary structures indicate a turbidite origin and petrographic analysis reve...
Subsurface characterisation for future CCS applications using uncommon 3D surface and borehole seismic survey geometries at Harvey, Western Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Milovan Urosevic, Sasha Ziramov*, Roman Pevzner, Konstantin Tertyshnikov, Sinem Yavuz, Anton Egorov, Andrej Bona, Valeriya Shulakova, Dominique Van Gent
- Date Published: September 2019
Abstract:
Within the South West Hub Project we conducted a comprehensive integrated study to map the fault and fracture network surrounding the Harvey 3 well to obtain an understanding of their propensity to act as conduits for the injected CO2. Her...
What lies beneath? A reflection on the porphyry copper exploration model
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Ken E. Witherly*
- Date Published: September 2019
Abstract:
Electrical methods have been applied to the search for porphyry copper and IOCG deposits since the early 1950s. While there is a generally accepted model of disseminated sulfides giving rise to a chargeability response, no clear association has been ...
An AI approach to automated magnetic formation mapping beneath cover
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: David A. Pratt*, K. Blair McKenzie, Anthony S. White
- Date Published: September 2019
Abstract:
Most regional scale magnetic maps are dominated by the magnetic characteristics of steeply dipping basement units truncated by an unconformity surface. It is easy to demonstrate that 80 to 90% of each total field magnetic anomaly is contributed by th...
Gold metallogeny of the northern Capricorn Orogen
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Imogen Fielding, Simon Johnson
- Date Published: September 2019
Abstract:
The timing and distribution of gold mineralization in Proterozoic orogens is influenced by crustal architecture which is often established long before gold mineralization occurs. Gold occurrences in such settings are commonly associated with crustal-...
Strategic electromagnetic geophysical prospecting across a belt – an example over the Albany Fraser Orogen
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Andrew Fitzpatrick*, Mike Whitford
- Date Published: September 2019
Abstract:
Nickel exploration routinely utilises electromagnetic (EM) techniques as a direct detection tool. Independence Group is currently exploring a large tenement holding in the Albany Fraser Orogen in Western Australia that contains its flagship Nova magm...
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 ...
Structural controls of the Ernest Henry IOCG deposit: Insights from integrated structural, geophysical and mineralogical analyses
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Jim Austin, Andreas Björk, Ben Patterson
- Date Published: September 2019
Abstract:
Iron Oxide Copper-Gold deposits (IOCGs) are structurally controlled, and typically display zonation of iron oxides and sulphides, which is potentially related to redox zonation. There are three main factors that determine the location and architectur...
Using Corona to test NMR response of iron ore chip samples
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Mark Downey, Kazek Trofimczyk*
- Date Published: September 2019
Abstract:
The application of Nuclear Magnetic Resonance (NMR) to investigate the distribution of moisture in materials has not normally been applied to iron ores due to the magnetic properties of iron. However recent test work on blast hole chip samples of iro...
The lithospheric structure and deep processes of the Mesozoic mineral systems in east China: constrained from integrated geophysical data
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Qingtian Lü*, Guixiang Meng, Jiayong Yan, Jinhua Zhao, Xuejing Gong
- Date Published: September 2019
Abstract:
Financed by the SinoProbe, a national collaborative multidisciplinary Earth science research project in China, the authors has conducted multi-scale and integrated geophysical exploration across the middle and lower reaches of Yangtze Metallogenic Be...
Beyond chi-squared: Additional measures of the closeness of a model to data
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Alan G. Jones*
- Date Published: September 2019
Abstract:
Subtle, and not so subtle, features in our increasingly large and complex datasets are being missed because of our reliance on a single number, typically chi-squared based, to describe the distance between a plausible model and the data. Additional m...
Tectonic analysis of regional potential field data
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Peter Betts*, Robin Armit, Caroline Tiddy, Sheree Armistead, Laurent Ailleres
- Date Published: September 2019
Abstract:
This contribution uses several case studies to illustrate how regional aeromagnetic and gravity data is used to undertake tectonic analysis. Regional aeromagnetic and gravity data is a powerful tool for tectonic analysis because it can be interpreted...
Application of audio-magnetotelluric method to cover thickness estimation for drill site targeting
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Wenping Jiang*, Ross Brodie, Jingming Duan
- Date Published: September 2019
Abstract:
Cover thickness estimation is critical to mineral exploration effectiveness in covered terrains. Geophysical methods are able to detect physical properties contrasts in different earth materials without seeing them. We present the application of the ...
Overpressure transmission through igneous intrusions: An unrecognized drilling hazard in volcanic affected basins?
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Nick Schofield*, Simon Holford, Alex Edwards
- Date Published: September 2019
Abstract:
In situ overpressures in sedimentary basins are commonly attributed to disequilibrium compaction or fluid expansion mechanisms, though overpressures in shallow sedimentary sequences may also develop by vertical transfer of pressure from deeper basin ...
Understanding the variability of sedimentary basin’s gravity response through stratigraphic modelling
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Vincent Crombez*, Luk Peeters, Richard Chopping
- Date Published: September 2019
Abstract:
It is well known that inversions of gravity data are non-unique and this means that if one model can be found that fits data then there is also a set of alternative models that fit the data equally well. This non-uniqueness also extends to the choice...
Time lapse in-hole electrical resistivity surveying during a shallow release of CO2 gas: Harvey, Western Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Brett Harris*, Alex Costall, Hoang Nguyen, Karsten Michael, Ludovic Ricard, Barry Freifeld, Arsham Avijegon, Andrew Pethick
- Date Published: September 2019
Abstract:
An in-hole electrode array was installed and cemented behind a fibreglass casing in a vertical monitoring well as part of an in-situ laboratory test for CO2 migration in a shallow fault zone in Harvey, Western Australia. The array consiste...
Formation of Very Thick Permian Coal Seams, Cooper Basin, Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Elena Alganaeva, Greg Smith
- Date Published: September 2019
Abstract:
The Weena Trough and the Milpera Depression in the SW Cooper Basin contains some unusually thick Permian coal seams. Their development is linked to the Late Carboniferous-Early Permian glacial palaeoclimates, the slow subsidence resulting from their ...
Geophysical investigation of mine waste in the King River Delta, Macquarie Harbour, Tasmania
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Matthew J. Cracknell*, Sibele C. Nascimento, Wei Xuen Heng, Anita Parbhakar-Fox, Thomas A. Schaap
- Date Published: September 2019
Abstract:
The majority of discharged mine waste from the Mt Lyell copper mine was deposited as deltaic sediments at the mouth of the King River, Macquarie Harbour, Tasmania. These waste materials are composed of sulphide bearing tailings and are a significant ...
The seven rocks that made Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Marita Bradshaw
- Date Published: September 2019
Abstract:
Key geological events of the last 4 billion years have shaped Australia’s present day environment, economy and society; and a limited number of rocks can be chosen to represent this history. Pilbara banded iron formations and Permian coal measures ...
Lithology characterisation of the roof and floor of the Moranbah measures coal seam using post-stack and pre-stack seismic inversion
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Margarita Pavlova*
- Date Published: September 2019
Abstract:
3D seismic technology has become a popular exploration and development tool among coal mining companies in Australia in the last ten years. Traditionally the main use of these seismic data is to inform the mine of the structural features such as faul...
The genesis of Carlow Castle: A unique Australian orogenic Cu-Co-Au deposit in the Archean Pilbara Craton
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: David Fox, Sam Spinks, Mark Pearce, Margaux Le Vaillant, Robert Thorne, Milo Barham, Mehrooz Aspandiar
- Date Published: September 2019
Abstract:
Carlow Castle is a Cu-Co-Au deposit situated within the western Pilbara Craton of Western Australia. Whilst Carlow Castle is the oldest discovered copper deposit in the Pilbara region, having been initially discovered in 1882, no detailed study of th...
PhotonAssay™ – Efficient & bulk gold analysis in the modern world
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Chenoa Tremblay*, Gary Wheeler, Anthony Oteri
- Date Published: September 2019
Abstract:
The PhotonAssayTM Max is an instrument utilising high-energy X-rays but reimaged for the modern world with full robotics and ability to keep up with the high demands of mining. Since Pierre Gy’s introduction of sampling theory into the g...
Geophysics and neural networks: learning from computer vision
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Mark Grujic, Liam Webb, Tom Carmichael
- Date Published: September 2019
Abstract:
The rapid advancement of computer vision is changing the way many industries approach image analysis. Object detection, image segmentation, textual characterisation and other related processes are helping people extract more meaningful information an...
Full Spectrum Falcon – Measuring wide broadband airborne gravity data
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Chris van Galder
- Date Published: September 2019
Abstract:
Full Spectrum Falcon combines a Falcon AGG system and an sGrav AG system to deliver a low noise gravity dataset across all the exploration wavelengths. The noise of the vertical gravity data from an AGG system will increase as its wavelength increase...
Complete gas-brine imbibition relative permeability curves increase confidence in gas field performance
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: M. Ben Clennell*, Cameron White, Ausama Giwelli, Matt Myers
- Date Published: September 2019
Abstract:
The standard methods used for measuring gas relative permeability during brine imbibition have been found to be inadequate as the resulting curves are incomplete and may include invalid points. CSIRO, together with an industry partner, developed new ...
Using machine learning to predict total organic content – case study: Canning Basin, Western Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Russell Menezes*
- Date Published: September 2019
Abstract:
Total Organic Content (TOC), one of the most important parameters for sweet spot mapping of unconventional plays is estimated using a RockEval Pyrolysis technique. This process being expensive and time-consuming, the sampling rate per well is very lo...
Reservoir flow modelling to constrain CO2 plume-fault interaction. South West Hub Carbon Capture and Storage Project, WA
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Laurent Langhi*, Ludovic Ricard, Julian Strand
- Date Published: September 2019
Abstract:
In order to improve the South West Hub Carbon Capture and Storage (SW Hub) site characterisation and reduce uncertainties around CO2 capacity, injectivity and containment, conceptual fault hydrodynamic models are defined and numerical simulations are...
Exploring for the future: new U-Pb geochronology for the South Nicholson region and implications for stratigraphic correlations
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Jade Anderson*, Chris Carson, Chris Lewis, Andrew Cross, Lidena Carr, Paul Henson, Natalie Kositcin
- Date Published: September 2019
Abstract:
Zircon and xenotime U-Pb SHRIMP geochronology was conducted on samples from the South Nicholson Basin, and western Mount Isa Orogen. These samples were collected from outcrop and core from the Northern Territory and Queensland. The age data indicate ...
The role of geochemistry in understanding mineral systems
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Carl W. Brauhart
- Date Published: September 2019
Abstract:
The mineral system concept is a valuable framework to use for mineral exploration because it allows the user to interpret their data with more flexibility than for traditional ore deposit models. Better context is provided by a well-constructed miner...
Sub-basin architecture of the Proterozoic McArthur Group, southern McArthur Basin
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Teagan Blaikie*, Marcus Kunzmann
- Date Published: September 2019
Abstract:
The Proterozoic McArthur Basin, located in the north-east Northern Territory, preserves several large sediment hosted Zn-Pb-Ag mineral deposits. These deposits are hosted within sub-basins that developed during deposition of the McArthur Group. Geoph...