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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 ...
Passive seismic horizontal to vertical spectral ratio (HVSR) surveying to help define bedrock depth, structure and layering in shallow coal basins
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: David Stannard, Jayson Meyers, Thomas Dronfield*
- Date Published: September 2019
Abstract:
Trial passive seismic HVSR survey lines were carried out in the north-western part of the Wilga sedimentary basin in Western Australia, which is a small and shallow isolated sub-basin to the Perth Basin, sitting above rifted Archaean granite-gneiss b...
What lies beneath? Prospecting for Hydrocarbons under a metamorphic allochthon, Timor-Leste
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: M. Bucknill*, Brendan Duffy, Jason Noble, Alex Berkovitch
- Date Published: September 2019
Abstract:
The structural context and Australian versus Asian affinity of regional outcrop of Timor’s Lolotoi Metamorphic Complex are critical to the interpretation of hydrocarbon prospectivity but are obscured by complex geology and still strongly debated. T...
A multi-disciplinary approach for defining nickel and gold mineral systems; Halls Creek Orogen, Western Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Fariba Kohanpour*, Sandra Occhipinti, Mark Lindsay, Weronika Gorczyk
- Date Published: September 2019
Abstract:
Geodynamic models, geological-geophysical interpretations, and isotope analysis illustrate that there are links between the nickel and gold mineral systems in the Halls Creek Orogen, Western Australia. Whole-rock Nd and Ar-Ar analysis of rocks throug...
The geological characteristics, geochemical signature and geophysical expression of porphyry copper-(gold) deposits in the circum-Pacific region
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Steve Garwin
- Date Published: September 2019
Abstract:
Porphyry deposits of the circum-Pacific region contain a large amount of the world’s copper, molybdenum and gold. These deposits are formed from calc-alkaline and potassic magmas characterized by varying oxidation states (fO2), which contribute to ...
Depth conversion and seismic inversion of the Scarborough gas field
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Joseph Kremor*, Manish Agarwal, Paul Spaans, Ung Sing Wong
- Date Published: September 2019
Abstract:
This paper shows how the application of advanced seismic processing, innovative seismic to well matching techniques and subsequent seismic inversion have resulted in a significant improvement when compared with seismic reservoir characterisation resu...
New insights into the offshore Canning Basin using a seamless onshore/offshore stratigraphic model
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Christopher Yule*, James Daniell
- Date Published: September 2019
Abstract:
The Canning Basin in Western Australia is classified as a frontier basin. Of the 345 wells drilled onshore, only eight have intercepted small commercial hydrocarbon deposits. The offshore Canning Basin is one of the world’s most underexplored Paleo...
Electromagnetic and electrical methods applied to mapping coked coal – A case study from the Bowen Basin, Eastern Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Jonathan Lowe*, James Reid, Eric Battig, Scott Napier, Dan Eremenco
- Date Published: September 2019
Abstract:
In coal mining it is important to know if localised areas of coal have been rendered worthless through direct contact with volcanic intrusions. To avoid dilution, accurate coked coal boundaries are traditionally mapped by drilling....
Pyxis – A study in cost-efficient near-field exploration, discovery and appraisal
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Megan Slade, Peter Thomas
- Date Published: September 2019
Abstract:
Realising and protecting the value of near-field exploration and appraisal is a constant challenge, especially during the recent low oil price cycles. This paper discusses the 2015 Pyxis gas discovery, and the means by which a cost-effective and valu...
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...
Discovering and using geophysical data in the 21st century
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Alex Ip*, Andrew Turner, Yvette Poudjom-Djomani, Ross C. Brodie, Phillip Wynne, Kelsey Druken, Neil Symington, Carina Kemp
- Date Published: September 2019
Abstract:
Large geophysical data has traditionally been difficult to manage in a consistent, open, and efficient manner. The demands of modern, large-scale computing techniques, coupled with the need for sound data and metadata management, mean that establishe...
Recent advances in nodal land seismic acquisition systems
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Tim Dean*, Denis Sweeney
- Date Published: September 2019
Abstract:
Early on in the history of seismic acquisition the advantages of being able to acquire data without the impediment of cables was identified. Despite the introduction of numerous systems since the 1970s nodal land acquisition systems have only relativ...
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...