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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...
Modelling the Palaeozoic tectonic evolution of the Lachlan Orogen
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Thomas Schaan, Sebastien Meffre, Joanne Whitakker, Matthew Cracknell, Michael Roach
- Date Published: September 2019
Abstract:
The Lachlan Orogen’s mineral wealth is a direct result of tectonic processes that took place in the early Palaeozoic, but the exact nature and timing of events is widely contested. Here, we apply new methods of deforming tectonic reconstruction mod...
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...
Characterisation of the Neoarchean Fortescue Group Stratigraphy – Integrated downhole geochemical mineralogical correlation from new diamond drilling
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Jessica Stromberg*, Sam Spinks, Mark Pearce
- Date Published: September 2019
Abstract:
The flood basalts and gold-bearing basal sediments of the 2775-2629 Ma Fortescue Group unconformably overlie the Mesoarchean West Pilbara Superterrane to the south of Karratha, Western Australia. Fresh exposures of the sedimentary units are lacking a...
Using recursive inversion as input for gross-rock volume extraction from lithology prediction volumes: How bad can it be?
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: James Shadlow*
- Date Published: September 2019
Abstract:
Reserves and Resources can be directly estimated by using seismic lithology prediction volumes generated from AVO inversion, calibrated to wells, to estimate sand rock volumes within a stratigraphic interval. However, high quality AVO inversion data ...
The discovery and geology of Sinclair, Australia’s first caesium deposit
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: David J. Crook*, Stuart T. Kerr, Jess A. Booth, Nigel W. Brand, Russell Panting
- Date Published: September 2019
Abstract:
The Sinclair Caesium Deposit, discovered in 2016 by Pioneer Resources Limited, is Australia’s first mining operation to commercially extract the caesium-rich mineral pollucite. Economic caesium deposits are extremely rare, with only three mining op...
New insights on the Upper Cretaceous Tiger Supersequence of the Bight Basin from International Ocean Discovery Hole U1512
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Carmine C. Wainman*, Gabriel Tagliaro, Peter J. McCabe
- Date Published: September 2019
Abstract:
The Bight Basin is considered to be one of Australia’s most prospective petroleum regions. However, the sparsity of geologic data means that potential petroleum plays in the basin have yet to be firmly established. In late 2017, International Ocean...
Palaeogeographic evolution of the Triassic succession, central North West Shelf
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Steve Abbott*, Claire Orlov, George Bernardel, Nadege Rollet, Duy Nguyen, Merrie-Ellen Gunning, Chris Nicholson
- Date Published: September 2019
Abstract:
Triassic deposition on the central North West Shelf (CNWS) mainly took place in a large depocentre comprising the Beagle Sub-basin and the Exmouth Plateau, and a small depocentre located within the Rowley Sub-basin. Thermal subsidence prevailed but s...
3D inversion of electromagnetic logging-while-drilling data
- Publication Name: Australasian Exploration Geoscience Conference
- Authors: David Marchant*, Nigel Clegg, Luke Rawsthorne, Jari Kunnas
- Date Published: September 2019
Abstract:
Electromagnetic logging while drilling is commonly used to infer information about the electrical properties around the wellbore and to aid in geosteering. Data from modern tools, which combine multiple transmitter and receiver orientations and offse...
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...