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Frequency and current analysis of non-linear electrical effects in mineralised rocks
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Alan Oertel*, Robert White, Steve Collins, Keith Leslie, Ben Spyridis
- Date Published: September 2019
Abstract:
Available electrical geophysical methods are specialised in detecting conductive and chargeable targets, particularly sulphide deposits. A key challenge facing Induced Polarisation (IP) and Transient Electromagnetism (TEM) methods is that often a cha...
Known, absent and potential mineral deposit types in Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: David I. Groves*, G. Neil Phillips
- Date Published: September 2019
Abstract:
Australia is in the top six global producers for a wide range of mineral commodities of abundant metals (Fe, Mn, Al, Ti), base metals (Ni, Cu, Zn, Pb), precious metals (Au, Ag), scarce metals (REE, Li, Sb), energy metals (U, Th) and industrial/ preci...
Hydrothermal dolomite distribution in the Emanuel Range as a constraint on timing of fault movement during mineralisation on the Lennard Shelf, Western Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Heather Middleton*, Vicki Pedone, Dennis Arne
- Date Published: September 2019
Abstract:
At least four petrographically, geochemically, temporally and spatially distinct dolomites have been identified in mid-late Devonian carbonate banks and reefal buildups of the Emanuel Range on the south eastern Lennard Shelf. Detailed mapping of the ...
Sea level controls on buried geomorphology within the Swan River estuary during the Late Quaternary
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Giada Bufarale*, Mick O’Leary, Alexandra Stevens
- Date Published: September 2019
Abstract:
A high-resolution seismic survey was carried out across the metropolitan reach of the Swan River (Perth, Western Australia) to investigate its Late Quaternary sub-surficial geomorphology. Shallow imaging data, integrated with sediment cores, pre-exis...
Preliminary dating of martite goethite iron ore in the Hamersley Province (Western Australia)
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: E.R. Ramanaidou, M. Danišík, M.A. Wells
- Date Published: September 2019
Abstract:
In Western Australia, iron ore deposits are divided into three types, Channel Iron Deposits (CID), Detrital Iron Deposits (DID) and Bedded Iron Deposits (BID). The latter are hosted in the banded iron-formation (BIF) of the Marra Mamba and Brockman I...
AusAEM Year 1: Some aspects of quality control and calibration
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Ross C. Brodie, Yusen Ley-Cooper, Ray Lockwood, David Murray
- Date Published: September 2019
Abstract:
For the AusAEM Year 1 survey an inertial measurement unit (IMU) was installed for the first time on the TEMPEST receiver bird to measure its orientation and to augment GPS derived positioning of the receiver. This has given us the opportunity to deve...
Mapping the hydrostratigraphy and groundwater salinity of the Ord Bonaparte plains from AEM and NMR data
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Kok Piang Tan*, Neil Symington, Chris Harris-Pascal, Larysa Halas, Ken Lawrie
- Date Published: September 2019
Abstract:
This study is part of the groundwater investigations of the Ord Bonaparte plains in the East Kimberley region of Western Australia. A key project aim is to establish a spatial hydrostratigraphic framework to better understand the hydrogeology....
A 10 kN portable electromagnetic vibrator for near-surface studies
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Tim Dean*, Hoang Nguyen
- Date Published: September 2019
Abstract:
In a previous paper, we described how a small electromagnetic vibrator could be manufactured using commercially available components for less than US$2,000. The basis of the unit was a set of four low-frequency actuators designed for use in home-thea...
Jurassic igneous activity in the Exmouth Sub-basin: Insights from new 3D seismic
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: G. O’Halloran*, R. Benson, C. Dempsey
- Date Published: September 2019
Abstract:
A late Jurassic pulse of igneous activity occurred within the Exmouth Sub-basin, with several submarine volcanic extrusive centres evident, along with contemporaneous intrusive feeder systems that fed them. The extrusive volcanics have been mapped on...
Using machine learning to interpret 3D airborne electromagnetic inversions
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Eldad Haber, Jen Fohring, Mike McMillan*, Justin Granek
- Date Published: September 2019
Abstract:
Although 3D airborne electromagnetic inversions have improved greatly in recent years, the presence of smooth boundaries has often been a strong criticism. This smoothness can easily be remedied by applying different types of regularization and const...
IPEx: A lower-cost superior reconnaissance RES/IP/MT survey
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Steve Boucher*
- Date Published: September 2019
Abstract:
This paper presents a technique derived from the full MIMDAS RES/IP/MT survey called IPEx. It offers a more cost-effective, enhanced reconnaissance IP investigation in areas of post-mineral cover, ensuring that a minimumsized predefined chargeable b...
Recent advances on the inversion of deep directional borehole resistivity measurements
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Vladimir Puzyrev*, David Pardo, Víctor Calo, Carlos Torres-Verdín
- Date Published: September 2019
Abstract:
We describe our latest developments on the inversion of subsurface electrical resistivity from deep directional borehole resistivity measurements. Two different methods are introduced for fast inversion of tri-axial induction measurements with multip...
Nova-Bollinger Ni-Cu sulfide ore deposits, Fraser Zone, Western Australia: Petrology of the host intrusions sulfide-silicate textures and emplacement mechanisms of the ores
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Valentina Taranovic*, Stephen J. Barnes, Steve Beresford, John Miller*, Steven Rennick
- Date Published: September 2019
Abstract:
The Nova-Bollinger Ni-Cu sulfide ore deposits are hosted within a suite of mafic-ultramafic intrusive cumulate bodies. The Lower Intrusion is a thin semi-conformable chonolith comprising unlayered mafic to ultramafic orthocumulates, hosting the bulk ...
Managing uncertainty to deliver complex development wells
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Peter van Ruth, Manish Agarwal, Scott Gagen
- Date Published: September 2019
Abstract:
Managing seismic depth uncertainty is a key consideration in placing horizontal development wells into thin reservoir targets. Seismic depth uncertainty has the potential to erode project value through missed reservoir (late landing or reservoir exit...
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...
Log dependent approach to predict reservoir facies and permeability in a complicated shaly sand reservoir
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Abdelrahman Elkhateeb*, Reza Rezaee, Ali Kadkhodaie
- Date Published: September 2019
Abstract:
The prediction of facies and permeability in complicated reservoirs represents a major challenge that necessitates the usage of advanced statistical techniques. A new approach is presented in this paper to generate a log based continuous facies log a...
Sensitivity-based data reduction of large 3D DC/IP surveys
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Sarah G.R. Devriese, Robert G. Ellis, Ken E. Witherly*
- Date Published: September 2019
Abstract:
In this paper, we present an algorithm based on the sensitivity of the data to the model space to reduce the large amount of data commonly collected during 3D DC/IP surveys to only those most relevant and important to the model space. The sensitivity...
Application of growing-body potential-field inversion from drillholes
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Kristofer Davis*
- Date Published: September 2019
Abstract:
The application of a growing body style of inversion within the program VPmg is presented. The body begins by a seed and grows until there are no eligible neighbours or the data misfit criterion is fit. In this case, the assumptions of source locatio...
Pore-scale study of fluids flow and fluid-fluid interactions during near-miscible CO2 EOR and storage in oil reservoirs
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Mojtaba Seyyedi*, Mehran Sohrabi
- Date Published: September 2019
Abstract:
CO2 injection in oil reservoirs has been widely accepted as an effective EOR and CO2 storage technique. While oil recovery and CO2 storage potential of this technique at the core scale has been widely studied, complex...
Triassic petroleum systems on the central North West Shelf – Learnings from the greater Phoenix area seismic mapping and geochemical studies
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Nadege Rollet*, Emmanuelle Grosjean, Dianne Edwards, Richard Kempton, Duy Nguyen, Steve Abbott, Claire Orlov, George Bernardel, Chris Nicholson
- Date Published: September 2019
Abstract:
The greater Phoenix area in the Bedout Sub-basin has experienced recent exploration success on Australia’s North West Shelf (NWS). Oil and gas discoveries in the Triassic reservoirs of the Keraudren Formation and Locker Shale have revived interest ...
Integrating seismic inversion in static models to capture geological heterogeneity and improve exploration outcomes
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Cristina Angheluta*, Megan Slade, Bonnie Henderson, David Kulikowski
- Date Published: September 2019
Abstract:
As an industry we have a poor track record of estimating prospect volume distributions and we tend to overpredict the pre-drill volumes, with most discoveries resulting in the pre-drill P90 volumes or less (Figure 1). To achieve improved prediction t...
Metal Earth: Role of multidisciplinary geophysical methods to improve knowledge of mineral deposition across Precambrian rocks
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Esmaeil Eshaghi, Richard Smith, Mostafa Naghizadeh, Graham James Hill, Eric Roots, Amir Maleki Ghahfarokhi, Saeid Cheraghi, John Ayer
- Date Published: September 2019
Abstract:
In this paper, we discuss acquiring, processing and preliminary modelling of multidisciplinary geophysical data (i.e. seismic, magnetotelluric, potential field data and petrophysical characterisations) to reliably model subsurface features along the ...
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...
Rock physics for multiscale, multiphysics data assimilation from molecular to laboratory scale
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Klaus Regenauer-Lieb*, Thomas Blach, Ankita Singh, Amalia Halim, Stuart Clark, Christoph Schrank
- Date Published: September 2019
Abstract:
Exploration geophysics and reservoir production strategies rely on a robust knowledge of reservoir petrophysical properties and their uncertainties. We have developed a new approach that not only quantifies uncertainties of petrophysical properties i...
Supporting data-driven exploration in NSW
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Keith Gates
- Date Published: September 2019
Abstract:
NSW legislative changes in 2016 mean that from 1 June 2021, confidential mineral exploration company reports will become open file 5 years after submission. This will result in a large amount of previously confidential data being released on 1 June 2...
Litho-structural controls on mineralisation at the Pillara carbonate-hosted Zn-Pb Deposit, Lennard Shelf District, Western
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Dennis Arne*, Simon Dörling, Robert Fagan, Heather Middleton
- Date Published: September 2019
Abstract:
The Pillara Zn-Pb deposit is located on the northeast margin of the Canning Basin, Western Australia where it is hosted by a series north-northeast-trending, en echelon, conjugate normal faults that bound a central graben plunging gently to the north...
Orogenic gold prospectivity mapping using machine learning
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Mike McMillan*, Jen Fohring, Eldad Haber, Justin Granek
- Date Published: September 2019
Abstract:
As major mineral discoveries have become rarer over the last two decades, the industry has begun to turn to new technologies to assist in the exploration process. One such advancement is the application of machine learning and artificial intelligence...
What you need to know to drill a high pressure, high temperature well
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Jonathan Slade*
- Date Published: September 2019
Abstract:
The challenges in drilling a high pressure and high temperature (HPHT) well are unique to every opportunity. The key to successfully drilling an HPHT well is to utilise the appropriate people, technology and design at the appropriate time. To do this...
Drones as a support tool for seismic acquisition
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Shaun Strong. Jason Stephenson
- Date Published: September 2019
Abstract:
The availability of relatively inexpensive UAVs in the form of drones provides many opportunities for seismic exploration.
While government regulations still provide many restrictions in this space, this trial has demonstrated that significa...
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...