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Building a 3D Geomechanical Model for the Fitzroy Trough
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Oliver Gaede, Moritz Ziegler, Oliver Heidbach
- Date Published: September 2019
Abstract:
We present initial results from a physically self-consistent 3D geomechanical model for the Fitzroy Trough in the Canning Basin, Western Australia. Our research aims to improve the understanding of in-situ stresses in the trough, in particular the ov...
Collaborating on pre-competitive geophysical projects in the Northern Territory, Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Tania Dhu, Angus McCoy, Ian Scrimgeour
- Date Published: September 2019
Abstract:
This paper reviews three different collaborative approaches that have been applied to acquire pre-competitive geophysical data in the Northern Territory. The collaborative structures involve the resource exploration industry, Northern Territory Geolo...
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...
Estimating interpretation uncertainty from magnetotelluric inversion
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Janelle Simpson*, Graham Heinson
- Date Published: September 2019
Abstract:
We present a depth to basement case study which incorporates knowledge of magnetotelluric inversion uncertainty into the final interpretation.
Inversion with Occam2D and rj-McMC was conducted for over 1600 magnetotelluric sites from the Isa ...
Application of micro-XRF to characterise diamond drill-core from lithium-caesium-tantalum pegmatites
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Naomi Potter, Nigel Brand
- Date Published: September 2019
Abstract:
Micro X-ray fluorescence (µXRF) is a rapid and non-destructive technique used to acquire qualitative and quantitative data at high spatial resolution (i.e. µm scale). To date this technology has yet to be utilised to its full potential in the explo...
Structural modification of the Jaguar VHMS Zn-Cu-Ag deposits, Yilgarn Craton, W.A.
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Jonathan Standing, David Potter
- Date Published: September 2019
Abstract:
The Jaguar VHMS camp represents a cluster of small sub-sea-floor replacement style VHMS deposits sandwiched between two closely spaced, craton-scale, shear zones. Despite preserving evidence for growth faults and feeder structures, the country rocks ...
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...
Case studies on the application of passive seismic horizontal to vertical spectral ratio (HVSR) surveying for heavy mineral sand exploration
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Nigel Cantwell*, Matthew Owers, Jayson Meyers, Sharna Riley
- Date Published: September 2019
Abstract:
This study presents the results from several case studies on the application of passive seismic Horizontal to Vertical Spectral Ratio (HVSR) surveying methods for Heavy Mineral Sand (HMS) deposit subsurface layer detection for exploration and mining....
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...
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...
Access to geological structures, density, minerals and textures through novel combination of 3D tomography, XRF and sample weight
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Mikael Bergqvist, Eric Landström, Alexander Hansson, Stefan Luth
- Date Published: September 2019
Abstract:
Scanning drill cores using combined data from X-Ray Transmission and X-Ray Fluorescence, automatically measuring the weight, and performing 3D tomography of the core at the same time, gives a high-resolution 3D visualisation of the structures, textur...
4D Seismic Bandwidth and Resolution Analysis for Reservoir Fluid-flow Model Applications
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Rafael Souza, David Lumley, Jeffrey Shragge, Alessandra Davolio, Denis Schiozer
- Date Published: September 2019
Abstract:
Limitations on the vertical resolution in seismic data and fluid-flow models challenges the accurate interpretation of time-lapse (4D) seismic signals to identify fluid saturation changes within hydrocarbon reservoirs. Conventional streamer seismic d...
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...
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...
Refraction tomography at the Nova Ni-Cu mine
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Ian James, Graeme Hird, Andrew Fitzpatrick
- Date Published: September 2019
Abstract:
The mining industry is increasingly using 3D seismic reflection datasets, from project genesis through to mature mine sites. During processing of the reflection data, the refracted arrival is digitised and used to correct for near-surface velocity va...
Low-Base Frequency Helicopter AEM Data from a Square-Wave System – Helitem2
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Adam Smiarowski, Graham Konieczny
- Date Published: September 2019
Abstract:
Exploration for targets at depth or targets obscured by conductive overburden have historically been a challenge with airborne EM methods. Although modern systems have been improved with greater primary transmitter moments, noise from receiver coil m...
Passive seismic HVSR surveying for groundwater exploration at the Chilalo Graphite Project, Tanzania
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Sharna Riley*, Jayson Meyers, John Sinnott
- Date Published: September 2019
Abstract:
Passive seismic HVSR surveying is increasingly being used for investigating the thickness of soft sedimentary cover deposits sitting over hard and fresh bedrock, and for direct drill targeting of paleochannels for groundwater and brine resources. A d...
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...
Assessment of the permanent seismic sources for borehole seismic monitoring applications: CO2CRC Otway Project
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Sinem Yavuz, Julia Correa, Roman Pevzner, Barry Freifeld, Todd Wood, Konstantin Tertyshnikov, Sofya Popik, Michael Robertson
- Date Published: September 2019
Abstract:
In the CO2CRC Otway Project, seismic monitoring has evolved from traditional campaign-based seismic acquisition using a large array of seismic receivers and mobile sources, towards the techniques using continuous borehole seismic acquisition based on...
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...
AEM, Seismic and Power-lines: A hydrogeological case study in Peel, Western Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Andrew Pethick, Brett Harris, Olga Barron
- Date Published: September 2019
Abstract:
Airborne time domain electromagnetic and high-resolution 2D seismic data were acquired in 2018 to map structures of hydrogeological significance in the Peel region; Western Australia. Interpretation of the airborne electromagnetic (AEM) survey was co...
Integrating a Minerals Systems Approach with Machine Learning: A Case Study of ‘Modern Minerals Exploration’ in the Mt Woods Inlier – northern Gawler Craton, South Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Mark Rieuwers, Antoine Caté
- Date Published: September 2019
Abstract:
There has been extensive exploration in the Mt Woods inlier in the northern Gawler Craton, South Australia since the 1960s, particularly for iron oxide-copper-gold (IOCG) mineralisation since the 1975 super giant Olympic Dam IOCG-U discovery by Weste...
Processing the first full azimuth OBN survey in Australia: a step change in imaging quality
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Unnikrishnan Chambath, Vincent Ganivet, Sergey Birdus, Joe Zhou, Alain Delorme, Leigh Scoby-Smith, Ivan Gregory, Matt Kovacevic, Tim Williams, Chris Walton
- Date Published: September 2019
Abstract:
Ocean Bottom Node (OBN) acquisition has been widely used in oil and gas industry to provide improved reservoir imaging when compared to conventional narrow azimuth (NAZ) towed streamer data. Its full azimuth (FAZ), high fold count, high repeatability...
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...
Experimental acid and (sc)CO2 reactions of Roseneath, Epsilon and Murteree gas shales: Opening or closing of gas accessible pores and metal release to water
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: J.K. Pearce, T. Blach, G. Dawson, Y. Melnichenko, G. Southam, S.D. Golding, J. Bahadur, D. Paterson
- Date Published: September 2019
Abstract:
Shale oil and gas is of recent interest in Australia, and the Roseneath, Epsilon and Murteree (REM) shales of the Cooper Basin, Australia, are unconventional gas targets. Shales have a high proportion of porosity in the sub-micron scale and hydraulic...
The Geological Survey of NSW’s approach to the MinEx Cooperative Research Centre’s National Drilling Initiative
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Astrid Carlton
- Date Published: September 2019
Abstract:
The Geological Survey of New South Wales (GSNSW) is undertaking a ten-year project to increase knowledge of basement and cover geology, mineral systems and hydrogeology in five under-explored regions in NSW. The project is part of the MinEx Cooperati...
Investigating rock micro-structure of sandstones by pattern recognition on their X-ray images
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Ankita Singh, Ryan Armstrong, Klaus Regenauer-Lieb, Peyman Mostaghimi
- Date Published: September 2019
Abstract:
Analysing rock micro-structure from micro-computed tomographic images of porous media is vital to understand fluid-flow and estimating petrophysical properties like permeability. The two main approaches of analysing rock micro-structure are (1) throu...
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...
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...
Combined potential field and airborne electromagnetic interpretation to unravel the geological history of the Curaca Valley Region, Bahia, Brazil
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: P. Letelier, S. Napier, J. Reid, P. Mejia
- Date Published: September 2019
Abstract:
Integrated geological-geophysical interpretation offers a robust way to answer geoscientific questions by providing better and faster decisions on where to explore in a regional context, and ultimately on local-scale targets. In particular, regional ...