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Application of passive seismic and AEM to 3D paleochannel imaging: Capricorn Orogen
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Sara Jakica, Lucy Brisbout
- Date Published: September 2019
Abstract:
This study uses shallow passive seismic HVSR (horizontal-to-vertical spectral ratio) technique to determine the depth and extent of a Cenozoic paleochannel composed dominantly of sand and clay incised into the Proterozoic granitic basement of the Cap...
Gippsland Basin 3D forward modelling in Badlands
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Xuemei Yang, Greg Smith
- Date Published: September 2019
Abstract:
The Gippsland basin geological history is modelled using the Badlands software constrained by a realistic 3D structural and stratigraphic model built in Petrel. The aim is to assess and calibrate the theoretical tectonic and sedimentary models using ...
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...
Quantified Detection of Carbonate Cementation in Sandstones using Standard Wireline Log Data
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Mark Bunch
- Date Published: September 2019
Abstract:
Carbonate cemented zones were identified within the lower Paaratte Formation of the eastern Otway Basin, Victoria, in southeastern Australia. A wireline log model trained on these zones can predict carbonate cementation within Late Cretaceous to Pa...
Current and future multicomponent towed streamer design
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Nicolas Goujon, Susanne Rentsch*, Leendert Combee, Fabien Guizelin, Khairul Faizi Ahmad
- Date Published: September 2019
Abstract:
The towed streamer market is moving towards the widespread use of multicomponent streamers. This type of streamer contains hydrophones and particle motion sensors which are used to carry out receiver-side deghosting of the data. The main source of n...
Biochemical and mechanical dispersion mechanisms of Au and As in areas covered by Permian glacial sediments and aeolian sand
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Walid Salama*, Ravi Anand, Tsing Bohu
- Date Published: September 2019
Abstract:
The most northeastern Yamarna Terrane consists of deeply weathered Archean basement and is covered by weathered Permian glacial sediments and recent aeolian sand dunes. This transported cover setting and regolith-landscape influences the effectivenes...
Identification of deep coal seam families using machine learning
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Tauqir Moughal*, Irina Emelyanova, David S. Warner, Erik C. Dunlop, Mohinudeen Faiz, David N. Dewhurst, Prue E.R. Warner, Marina Pervukhina
- Date Published: September 2019
Abstract:
The Cooper Basin of Australia is a world-class unconventional gas resource with estimated gas resources of 29.8 trillion cubic feet. However, the production of this gas is challenging as the significant gas resources are located in deep coal seams, w...
Faster play-based exploration, Petrel Sub-basin, Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Laura Phillips*, Paul Massara, Kenneth McCormack
- Date Published: September 2019
Abstract:
The Paleozoic extensional Petrel Sub-basin within the Bonaparte Basin, Australia is relatively underexplored. Historical two-dimensional seismic data and 59 exploration wells provide a substantial residual sub-surface uncertainty. Woodside’s WA-522...
Making EM systems and bore logs speak the same language
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Aaron Davis*, Juerg Hauser
- Date Published: September 2019
Abstract:
Borehole induction logs, together with lithology records, are valuable for inferring geological and geophysical features in the subsurface. They offer insight into the relationship between geology and geophysics, and are an important source of inform...
Anisotropy analysis from 3D VSP surveys acquired at Otway site
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Sofya Popik, Andrej Bona, Roman Pevzner
- Date Published: September 2019
Abstract:
Knowledge of seismic anisotropy is highly important for Otway site as it can improve the quality of seismic imaging and thus provide better 4D signal/noise ratio. The presence of anisotropy has already been reported at the Otway site.
Compar...
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...
Direct imaging of alteration with high-resolution hard-rock 3D seismic data at the Darlot Gold Mine
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: G. Hird*, W. Turner
- Date Published: September 2019
Abstract:
The Darlot gold mine is an Archean orogenic deposit located in the world-class gold and nickel terrain of the Yandal granite-greenstone belt within the Yilgarn Craton in Western Australia...
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...