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Regional airborne gravity surveys in Western Australia: Considerations for the end user
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Martin Bates*, Stefan Elieff, Krista Kaski, David Howard, John Brett, Richard Lane
- Date Published: September 2019
Abstract:
Regional airborne gravity surveys are being acquired over much of the State of Western Australia by the Geological Survey of Western Australia (GSWA) and Geoscience Australia (GA) to provide coverage where existing ground gravity coverage is sparse. ...
The structural architecture of the central North West Shelf – insights from regional scale mapping of the Triassic succession
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Claire Orlov*, Chris Nicholson, George Bernardel, Steve Abbott, Nadege Rollet
- Date Published: September 2019
Abstract:
The central North West Shelf has been the focus of a regional mapping program by Geoscience Australia targeting the Triassic succession. Resulting updates to the regional structural understanding are presented, showcasing variations in structural sty...
Imaging a mafic underplate in 3D: an example from the east Albany–Fraser Orogen and Yilgarn Craton margin
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Lucy Brisbout*, Ruth Murdie
- Date Published: September 2019
Abstract:
In this study a mafic underplate along the margin of the Proterozoic east Albany–Fraser Orogen and Archean Yilgarn Craton is imaged using 3D gravity forward modelling. The 3D model was constructed in GeoModeller and tested by 3D gravity forward mod...
Backing up the AEM – unravelling a palaeovalley fill for groundwater exploration in the APY Lands
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Carmen Krapf, Adrian Costar, Mark Keppel, Kent Inverarity, Andy Love, Liliana Stoian, Georgina Gordon, Camilla Soerensen, Tim Munday
- Date Published: September 2019
Abstract:
A major constraint on development in the Anangu Pitjantjatjara Yankunytjatjara (APY) Lands is the lack of reliable water supplies. Sandstone strata found within palaeovalleys has long been recognised as potentially productive aquifers in outback Sout...
Induced polarization chargeability calibration standards
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: John E.E. Kingman, Terry J. Ritchie, Peter Rowston*
- Date Published: September 2019
Abstract:
Standard practices in scaling time-domain induced polarization (IP) chargeability estimates are frequently inconsistent or poorly supported. Antiquated M331 units (milliseconds) and scaling standards in particular, represent: a) ill-informed assumpti...
Handling noise in AEM inversion – implications for subsurface characterisation
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Shane Mulè, Camilla Soerensen, Tim Munday
- Date Published: September 2019
Abstract:
Noise is a fundamentally limiting factor for what aspects of the subsurface can be imaged using an AEM system. This paper compares the use of two inversion techniques and two different methods of estimating data noise, to determine how the choice of ...
All that wobbles isn’t necessarily azimuthal anisotropy
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Helen Debenham*, Jennifer Badry, Mohamed Megebry
- Date Published: September 2019
Abstract:
Onshore 3D seismic data is often acquired with rich azimuth coverage by utilising orthogonal shooting (or cross-spread) layouts. This means that azimuthal anisotropy, if present, can be readily observed and its effects on the data can be quantified a...
Statistical rock physics analysis and modelling in the Browse Basin
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Shuichi Desaki*, Yuki Kobayashi, Peter Miklavs
- Date Published: September 2019
Abstract:
In this study, we performed rock physics analysis and modelling in the Browse Basin, in which we analysed the relationships among elastic properties of end-member (EM) sandstone (SST) and EM-shale, and then, modelled the properties of non-EM-SST and ...
Integrating fault kinematics into implicit 3D modelling of fault networks
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Lachlan Grose*, Laurent Ailleres, Gautier Laurent
- Date Published: September 2019
Abstract:
Existing 3D geological modelling methods do not incorporate fault kinematics and do not have any way of modelling interacting fault networks, e.g. duplex systems, flower structures and listric fault systems. It is difficult to build models that honou...
Transforming an abandoned well into a permanent downhole receiver array: Harvey-3 case study
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Ludovic Ricard, Roman Pevzner, Evgenii Sidenko*, Konstantin Tertyshnikov, Sandeep Sharma, Dominique Van Gent, Roman Isaenkov
- Date Published: September 2019
Abstract:
Fibre optic sensing is an emerging technology enabling reliable long term monitoring and surveillance of the subsurface. In this contribution, we detail the first Australian installation of a fibre optic sensing system as part of a stratigraphic well...
Resolving complex velocity and gas absorption features with full-waveform inversion in the Taranaki Basin, New Zealand
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Yuelian Gong*, Dominic Fell, Robert Hunn, Richard Bisley, Alexander Karvelas, Bee Jik Lim
- Date Published: September 2019
Abstract:
The Western Platform multiclient survey is in the Taranaki Basin, offshore New Zealand. Legacy imaging efforts have suffered due to being unable to overcome the presence of multiple geological challenges. A complex shallow overburden across the surve...
Significance of Early Triassic conodont zones from Western Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: John D. Gorter, Michael J. Orchard, Robert S. Nicoll, Darren Ferdinando
- Date Published: September 2019
Abstract:
The Cunaloo Limestone Member of the Locker Shale (Kockatea Shale facies) from the Carnarvon Basin contains a distinctive conodont zone also seen in the informally named ‘Limestone Marker’ in the lower Kockatea Shale of the northern Perth Basin. T...
Using mud gas components to quantify hydrocarbon liquid yields for gas zones in the Patchawarra Formation of the Western Flank, Cooper Basin
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Christopher Webb, Belinda Wong*, Regie Estabillo
- Date Published: September 2019
Abstract:
This paper will present a new quantifiable method to forecast the liquid yields of specific gas zones utilizing mud gas logs. The method uses simple formulas applied to mud gas ratios to provide estimates of liquid yield per individual gas zone. Exam...
Basin-scale fluid-flow models of the McArthur River mineral system – Constraints from geochemistry, geophysics and sequence stratigraphy
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Peter Schaubs*, Heather Sheldon, Teagan Blaikie, Marcus Kunzmann, Susanne Schmid, Sam Spinks
- Date Published: September 2019
Abstract:
This abstract reports on the insights gained from numerical simulations which have been used to place constraints on the nature of critical geological processes responsible for sediment-hosted base metal mineralisation in the southern McArthur Basin,...
Scale reduction using magnetotellurics – a mineral exploration example from the Olympic Domain, South Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Stephan Thiel*, Kate Robertson, Wenping Jiang
- Date Published: September 2019
Abstract:
We present results of 334 ultra-wide band MT stations across an area of 100 km x 100 km in the prospective eastern Gawler Craton. The survey area is situated ~100 km south of the supergiant Olympic Dam IOCG deposit, across an area of several IOCG dep...
pXRF assessment of new magmatic fertility indicators in the Macquarie Arc
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Tristan Wells*, Sebastien Meffre, David Cooke, Jefferey Steadman, Jonathon Hoye
- Date Published: September 2019
Abstract:
This research presents a new method for assessing magmatic fertility using pXRF in altered terranes using Zr and Y ratios. A study of global batholith related mineralised porphyries, highlights a low Zr fractionation trend. The depletion in Zr is ass...
Dude, Where’s My Gun? A near-surface geophysics case-study
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Tim Dean, Alex Costall, Nichole Sik, John Blylevens, Andrew Pethick and Dominic Howman
- Date Published: September 2019
Abstract:
Buckland Hill, near Fremantle in Western Australia, was the site of a costal defence battery from 1942 until 1963. After the army left the site in the mid-1980s, it was developed for housing, but the battery area was retained as a park and later deve...
Geophysical expression of the Meyers Crater, a new meteorite impact crater discovered in the Coolgardie Goldfield of Western Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Jayson Meyers*, Sharna Riley, Wesley Groome
- Date Published: September 2019
Abstract:
Detailed airborne electromagnetic (VTEM), gravity and passive seismic HVSR surveying, followed up by RC and diamond drilling, has identified an isolated circular and geologically young meteorite impact crater filled with sediments and located next to...
Magnetic and gravity source models of the Gairdner Dolerites
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Philip Heath, Clive Foss
- Date Published: September 2019
Abstract:
The Gairdner Dolerites feature prominently in magnetic and gravity images of South Australia. They are a volcanic intrusive, easily identifiable in SA magnetic images as a set of NNW-SSE linear features. The Gawler Craton Airborne Survey (GCAS) has r...
The Discovery of the Bumblebee and Grapple Mineralisation and Impacts on Exploration at the Lake Mackay Project
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Mike Whitford, Doug Winzar
- Date Published: September 2019
Abstract:
The Grapple and Bumblebee mineralisation at the Lake Mackay Project have been discovered using a combination of routine fine fraction soil sampling, drilling and focused ground electromagnetic methods. Soil sampling initially provided the target area...
Geological insights of Northern Australia’s AusAEM airborne EM survey
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Yusen Ley-Cooper, Ian Roach, Ross C. Brodie
- Date Published: September 2019
Abstract:
Airborne electromagnetic data generated by the AusAEM Survey are shown to map mineral deposit host rocks and regional geological features within the AusAEM Survey area. We have developed new functionality in Geoscience Australia’s sample-by-sample ...
The Pilbara Mesoarchean conglomerate gold versus Quaternary colluvial gold: are they genetically linked?
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Sam Spinks, Mark Pearce, Margaux Le Vaillant, David Fox
- Date Published: September 2019
Abstract:
Recently discovered nugget gold (Au) in boulder conglomerate between the Mesoarchean West Pilbara Superterrane basement and the overlying volcano-sedimentary stratigraphy of the Neoarchean Fortescue Group in Western Australia have drawn comparisons w...
New insights into the Exmouth Sub-basin: Seismic acquisition, processing and imaging
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Alexander Karvelas*, Bee Jik Lim, Lianping Zhang, Haryo Trihutomo, Oliver Schenk, Sugandha Tewari
- Date Published: September 2019
Abstract:
Hydrocarbon exploration in the Exmouth Sub-basin, North West Shelf, Australia, has resulted in the discovery of a variety of oil and gas accumulations mainly in Upper Jurassic and Lower Cretaceous intervals. However, the distribution of the different...
Quaternary buried valley characterization on the Canadian Prairies using a shear land-streamer
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: David G. Schieck, Robert B. Hearst*
- Date Published: September 2019
Abstract:
A 72 channel 3-component land-streamer in conjunction with an IVI Envirovibe modified with a transverse shearpack has been constructed and tested over a known >70 m Quaternary buried valley system SE of Calgary, Alberta. Recent near surface seismic ...
The Borden Gold Deposit, northern Ontario: Contributions of VTEM helicopter time-domain EM and magnetics leading to discovery
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Marta Orta, Jean M. Legault*, Karl Kwan, Sergio Espinosa
- Date Published: September 2019
Abstract:
The Borden Gold deposit (9.3 Mt @ 5.3 g/t Au) is a structurally controlled Archean mesothermal lode gold deposit within the Kapuskasing Structural Zone, in northern Ontario. Helicopter VTEM and magnetic surveys were flown over the Borden Gold deposit...
A framework for multi-sensor image segmentation using fuzzy collaborative clustering
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Tauqir Moughal*, Abeer Mazher, Irina Emelyanova, Fusheng Yu
- Date Published: September 2019
Abstract:
The massive availability of remote sensing data and advances in data analytics have improved the capacity for mapping land cover and subsurface.
Specifically, in case of multi-sensor remote sensing images, the independent analysis of each im...
Application of passive seismic and AEM to 3D paleochannel imaging: Capricorn Orogen
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Sara Jakica, Lucy Brisbout
- Date Published: September 2019
Abstract:
This study uses shallow passive seismic HVSR (horizontal-to-vertical spectral ratio) technique to determine the depth and extent of a Cenozoic paleochannel composed dominantly of sand and clay incised into the Proterozoic granitic basement of the Cap...
Gippsland Basin 3D forward modelling in Badlands
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Xuemei Yang, Greg Smith
- Date Published: September 2019
Abstract:
The Gippsland basin geological history is modelled using the Badlands software constrained by a realistic 3D structural and stratigraphic model built in Petrel. The aim is to assess and calibrate the theoretical tectonic and sedimentary models using ...
From a Mining Mindset to Regional Discovery: A Case Study for Hematite Iron Ore Exploration in Mauritania
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Bert De Waele, Alex Aitken, Michael Van Mourik, Khalifa Oul Laab, Mohamed Elhacen Ould Med Yeslem, Thiam Mohamedou
- Date Published: September 2019
Abstract:
There has been extensive mining for hematite mineralisation in Mauritania since the 1950s, focused on the Kediat Ijil and Mhaoudat regions in northern Mauritania. These discoveries were largely made during the colonial period, with only limited addit...
Quantified Detection of Carbonate Cementation in Sandstones using Standard Wireline Log Data
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Mark Bunch
- Date Published: September 2019
Abstract:
Carbonate cemented zones were identified within the lower Paaratte Formation of the eastern Otway Basin, Victoria, in southeastern Australia. A wireline log model trained on these zones can predict carbonate cementation within Late Cretaceous to Pa...