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Structural and lithological controls on the geometry and morphology of igneous intrusions: a 3D seismic case study from the Exmouth sub-basin, NW Shelf
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Niall Mark, Simon Holford*, Nick Schofield, Christian Eide, Stefano Pugliese, Douglas Watson, David Muirhead
- Date Published: September 2019
Abstract:
Rift-related magmatism resulting in widespread igneous intrusions has been documented in various basins, including the Faroe Shetland Basin (UK), Voring and Møre Basins (Norway) and the Browse and Carnarvon basins of the NW Shelf of Australia. Seism...
Exploring for the future: Kidson Sub-basin seismic interpretation
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Chris Southby*, Lidena Carr, Paul Henson, Peter Haines, Alex Zhan, Jade Anderson, Susannah MacFarlane, Tanya Fomin, Ross Costelloe
- Date Published: September 2019
Abstract:
Exploring for the Future is a four-year $100.5 million initiative by the Australian Government conducted in partnership with state and Northern Territory government agencies and universities that aims to boost northern Australia's attractiveness as a...
Mineralization signatures of the magnetite-dominant Acropolis prospect, Olympic Dam IOCG district, South Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Marija Dmitrijeva*, Cristiana L. Ciobanu, Kathy J. Ehrig, Andrew V. Metcalfe, Max R. Verdugo-Ihl, Jocelyn McPhie, Nigel J. Cook
- Date Published: September 2019
Abstract:
The Acropolis prospect is a vein-style magnetite (±apatite ±hematite) system located ~20 km southwest from the giant Olympic Dam iron-oxide copper gold (IOCG) deposit, South Australia. A whole rock dataset comprising 4,864 core samples from fourtee...
Facies classification with different machine learning algorithm – An efficient artificial intelligence technique for improved classification
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Partha Pratim Mandal, Reza Rezaee
- Date Published: September 2019
Abstract:
Accurate and precise identification of lithological facies is vital to understand geological variation in a proven reservoir. Four specific different machine learning (ML) classification algorithms are implemented to predict facies on an open dataset...
Inversion of magnetotellurics data with enhanced structural fidelity
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Federico Golfré Andreasi*, Simone Re, Federico Ceci, Luca Masnaghetti
- Date Published: September 2019
Abstract:
The magnetotelluric method has been successfully used as a complementary tool in the exploration of foothill plays but its intrinsic non-uniqueness and its reduced structural fidelity, with respect to a seismic section, make its interpretation more c...
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...
Update on the geophysical expression of the Abra sedimentary replacement Pb-Ag-Cu-Au deposit, Western Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: David Stannard*, Jayson Meyers, Ed Turner, Angelo Scopel
- Date Published: September 2019
Abstract:
The Abra sedimentary replacement Pb-Ag-Cu-Au deposit is located in the Paleoproterozoic Edmund Basin, 900km NNE of Perth. Mineralisation at Abra has no surface expression and the deposit was discovered in 1981 by drill testing coincident magnetic and...
The South West Hub: carbon storage in the southwest of Western Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Dominique Van Gent, Sandeep Sharma
- Date Published: September 2019
Abstract:
The South West Hub (SW Hub) project led by the Department of Mines, Industry Regulation and Safety (DMIRS) in Western Australia has been investigating and characterising the Lesueur Sandstone as a potential target carbon dioxide injection and storage...
Cimatti Field – An example of using seismic amplitude to determine in-place resource
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Michael Micenko*
- Date Published: September 2019
Abstract:
The Cimatti oil field is located in the Exmouth sub-basin offshore Western Australia. The area has good 3D seismic coverage and the Jurassic Macedon Member reservoir is associated with an anomalously high seismic amplitude. These anomalous amplitudes...
Maximising the value of 2D hard rock seismic acquisition at Escondida Porphyry Copper Mine
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Heather Schijns*, Gabriel Madero
- Date Published: September 2019
Abstract:
In mining areas with limited previous seismic acquisition, 2D seismic lines are often acquired to determine viability of the method and optimal survey parameters in advance of a more comprehensive 3D survey. Consideration of the design and acquisitio...
The sample boundary effect in the low-frequency measurements of the elastic moduli of rocks
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Wenhui Tan, Vassily Mikhaltsevitch*, Maxim Lebedev, Stanislav Glubokovskikh, Boris Gurevich
- Date Published: September 2019
Abstract:
In this study we examine the effect of the boundary conditions on the laboratory measurements of the elastic properties of a fluid-saturated sedimentary rock at low frequencies. In laboratory experiments associated with studying fluid effects on elas...
The Bight Basin, evolution and prospectivity II; seismic, structure and balanced sections
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Kevin C Hill*, Jane Cunneen, Rebecca Farrington
- Date Published: September 2019
Abstract:
A regional, high-quality seismic traverse from the coast to oceanic crust across the Bight Basin has been assembled and interpreted in detail, then balanced, restored, decompacted and replaced at paleo-water depths. The Late Cretaceous Ceduna Delta d...
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...
Insight from AIP modelling of VTEM ET data from Colorado
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Andrea Viezzoli, Burke Minsley, Antonio Menghini
- Date Published: September 2019
Abstract:
Portions of the VTEM ET dataset from the Upper East River survey in Colorado were strongly affected by airborne induced polarization (AIP) effects. Ignoring AIP contributions to the data leads to difficulties in geological interpretation and loss of ...
A statewide 3D geological model for New South Wales
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Edward Stolz, Giovanni Spampinato, John Davidson
- Date Published: September 2019
Abstract:
The Geological Survey of New South Wales is building a statewide 3D geological model comprising a series of interlocking province-scale models and a 3D statewide fault network. The model is being developed in conjunction with the New South Wales Seam...
Fracture identification by reflected guided borehole radar waves
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Binzhong Zhou*, Jianjian Huo, Iain Mason, Qing Zhao
- Date Published: September 2019
Abstract:
Reflected guided borehole radar waves can be observed when a borehole radars (BHR) is either suspended by a conductive communication cable or run in a borehole filled with saline water. They are often referred as unwanted contaminations to the conven...
Orogenic gold deposits: part of a global dynamic conjunction between subduction and gold
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: David I. Groves
- Date Published: September 2019
Abstract:
Orogenic gold deposits represent a coherent deposit class that were deposited from low-salinity CO2-rich fluids over a range of crustal depths from 3 to 20 km. They are widely considered to have formed from crustal metamorphic fluids generated at the...
Defining the Eyre Conductivity Anomaly with the Tumby Bay MT transect
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Kate Robertson, Ben Kay, Lachlan Loader, Graham Heinson*, and Stephan Thiel
- Date Published: September 2019
Abstract:
We present results of 36 broadband magnetotelluric (MT) stations along a 70 km ENE-WSW profile across the southern Eyre Peninsula, South Australia. The transect crosses the Eyre Peninsula Anomaly (EPA), first identified by induction arrows, and visua...
Rapid field identification of LCT pegmatite mineralogy: Application of portable Raman spectroscopy
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Sophie Perring*, Nigel Brand
- Date Published: September 2019
Abstract:
Rapid field identification of mineralogy is critical for exploration and ore extraction. For LCT pegmatites, a significant challenge is presented as many dominant minerals are visually similar and many of these minerals cannot be identified by common...
Imaging challenges at Gulf of Papua (PNG) and their solutions through high-end imaging technology
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Zongying Gong*, Subhash Chandra, Xiaodong Wu, Yajing Li, Min Zhi, Michael Szczepaniak, Barry Hung
- Date Published: September 2019
Abstract:
Recently, there has been increasing interest in exploration of the Gulf of Papua (GoP), part of the Papuan Basin. This Basin has undergone a complicated structural and stratigraphic evolution related to its position on the northeastern edge of the Au...
Resolving Structural Uncertainty using DAS VSP Survey in Central Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Konstantin Galybin, Cameron Jones, Frank Nicholson, Ryan Chapman, Rob Twigg
- Date Published: September 2019
Abstract:
Borehole seismic technology provides an efficient way to image the subsurface in high-resolution, through 3D, Walkaway or Offset VSPs. Whilst acquisition time of the conventional VSP survey is less than surface seismic, such VSP surveys can take hour...
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...
Observations of geophone spurious resonance
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Steve Hearn*, Shaun Strong, Andrew Kinmont
- Date Published: September 2019
Abstract:
A detailed understanding of the frequency response of geophones is critical for the design and quality control of broadband seismic surveys. We illustrate a pragmatic methodology for accurate identification of geophone spurious resonances. We include...
Seismic evidence for seal and reservoir in the Late Cretaceous Ceduna Delta, Great Australian Bight
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Ben Tredrea*, Phillip Horton
- Date Published: September 2019
Abstract:
The Ceduna Sub-Basin contains a large and underexplored Jurassic - Cretaceous rift, located within the Great Australian Bight Basin. Limited exploration to date has targeted the Late Cretaceous Hammerhead and Tiger Super sequences (SS) of the Ceduna ...
Bayesian joint inversion of controlled source electromagnetic and magnetotelluric data to infer presence of a freshwater aquifer offshore New Jersey
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Daniel Blatter, Kerry Key, Anandaroop Ray*, Chloe Gustaffson, Rob Evans
- Date Published: September 2019
Abstract:
To evaluate the extent of a low salinity aquifer within the continental shelf offshore New Jersey, USA, we adapt a Bayesian trans-dimensional Markov chain Monte Carlo (McMC) algorithm for jointly inverting surface towed controlled source electromagne...
Using network topology to constrain fracture network permeability
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Rowan Hansberry*, Simon Holford, Rosalind King, Natalie Debenham
- Date Published: September 2019
Abstract:
Predicting the interconnectivity and permeability of fractures at any scale remains a fundamental challenge in structural geology. Models which predict the likelihood of fracture opening based on their relation to the stress field can be applied at s...
West Australian gold resources: crisis or hubris?
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Julian Vearncombe*
- Date Published: September 2019
Abstract:
Criticism of the exploration and mining industry for failing to find enough new deposits and open new mines is misplaced. Significant growth in the size of gold Resources on many mines of the Yilgarn Craton has occurred well after the deposit was dis...
Characterising lithium host minerals within the lateritic duricrust, Greenbushes, Western Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Sophie Vuleta*, Monica LeGras, Raymond E. Smith, Carsten Laukamp, Louise Schoneveld, Ravi Anand
- Date Published: September 2019
Abstract:
Whilst detailed geochemical analyses have been conducted to mitigate the complications regolith cover poses to modern exploration efforts, less attention has been directed to the mineralogical associations that exist between lateritic residuum and po...
Application of high-end seismic imaging technologies for field development in NWS Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Min Lee Chua, Kai Zhao, Narcisa Lazarescu, Wai King Yong, Sergey Birdus, Alexey Artemov, Xiang Li
- Date Published: September 2019
Abstract:
The North West Shelf, situated in the north-west of Western Australia, is a world-renowned offshore hydrocarbon province with investments of more than A$200 billion to date. However, the quality of the legacy seismic often suffersfrom severe residual...
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...