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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 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...
Improved HSEQ and survey efficiency demonstrated with a new remotely operated streamer cleaning tool
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Rune Tønnessen, Trygve Skadberg, James Wright, Andrew Long*
- Date Published: September 2019
Abstract:
Barnacle growth on seismic streamers creates noise on the recorded signals. Keeping a low noise level in barnacle areas is challenging to seismic crews: Frequent workboat trips are required for streamer cleaning, and workboat operations are weather-d...
Machine assisted drillhole interpretation of iron ore resource evaluation holes in the Pilbara
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Daniel Wedge*, Owen Hartley, Andrew McMickan, Eun-Jung Holden, Thomas Green
- Date Published: September 2019
Abstract:
In minerals exploration, routine drilling is performed and the data logged from these drillholes, including lithological composition, assays, and downhole geophysical measurements such as natural gamma logs, are used to create geological interpretati...
Full waveform inversion of simultaneous long-offset data
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Nizar Chemingui, Alejandro A. Valenciano, Andrew Long*
- Date Published: September 2019
Abstract:
The standard workflow for velocity model building (VMB) in complex regimes is an interpretive process that requires time-consuming manual intervention and remains an error-prone process that can produce suboptimal results. We discuss an application o...
Understanding the causes of low frequency shadow below gas hydrates
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Ayman Noor M. Qadrouh*, Saad Alajmi
- Date Published: September 2019
Abstract:
Gas hydrates consider as one of the prospective natural resource that can supply energy. The seismic method has successfully been applied to locate gas hydrates. Their presence is revealed by bottom simulating reflectors (BSR) which represent the sei...
New insights into the Exmouth Sub-basin: Seismic acquisition, processing and imaging
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Alexander Karvelas*, Bee Jik Lim, Lianping Zhang, Haryo Trihutomo, Oliver Schenk, Sugandha Tewari
- Date Published: September 2019
Abstract:
Hydrocarbon exploration in the Exmouth Sub-basin, North West Shelf, Australia, has resulted in the discovery of a variety of oil and gas accumulations mainly in Upper Jurassic and Lower Cretaceous intervals. However, the distribution of the different...
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...
The Science of Discovery – from Exploration 1.0 to Discovery 2.0
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Timothy Craske*
- Date Published: September 2019
Abstract:
The tools of modern exploration developed in the post-war and cold war periods are no longer delivering mineral discoveries at the required rate for future economic production. The near surface search space is becoming mature. A new exploration toolk...
Metasomatic/depletion events affecting Cratons and “cratons”
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Tom Wise*, Stephan Thiel, Rian Dutch, Mark Pawley, Kate Robertson
- Date Published: September 2019
Abstract:
We integrate seismic tomographic models and filtered gravity anomaly maps to investigate the compositional variations in the SCLM of Australia. We find zones of relative enrichment and depletion coinciding with the spatial extent of major thermal eve...
Geophysical investigation of mine waste in the King River Delta, Macquarie Harbour, Tasmania
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Matthew J. Cracknell*, Sibele C. Nascimento, Wei Xuen Heng, Anita Parbhakar-Fox, Thomas A. Schaap
- Date Published: September 2019
Abstract:
The majority of discharged mine waste from the Mt Lyell copper mine was deposited as deltaic sediments at the mouth of the King River, Macquarie Harbour, Tasmania. These waste materials are composed of sulphide bearing tailings and are a significant ...
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...
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...
What will it take to improve the characterisation of deep mineral deposits in order to assess “economic value” early in the discovery process?
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Joe Cucuzza*
- Date Published: September 2019
Abstract:
In Australia, in particular, the consensus is that most, if not all, of the world-class non-ferrous mineral deposits that are either at or near the surface have been found. This means that we need to look deeper in the new greenfield search space cha...
Eromanga oil traps – a multi field post-mortem
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Keith Martens*
- Date Published: September 2019
Abstract:
The purpose of this paper is to examine the remaining oil potential of the Eromanga Basin, specifically in the Cooper region....
New insights on chimney growth model and native gold enrichment in modern seafloor hydrothermal chimneys
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Siyu Hu*, Steve Barnes, Anais Pagès
- Date Published: September 2019
Abstract:
Seafloor hydrothermal chimneys from back-arc basins are important hosts for metals, e.g. Cu, Zn, Pb, Ag and Au, and bear potential for deep-sea mining. A solid understanding of the distribution of metals requires appreciation of detailed mineralogy a...
Statistical rock physics analysis and modelling in the Browse Basin
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Shuichi Desaki*, Yuki Kobayashi, Peter Miklavs
- Date Published: September 2019
Abstract:
In this study, we performed rock physics analysis and modelling in the Browse Basin, in which we analysed the relationships among elastic properties of end-member (EM) sandstone (SST) and EM-shale, and then, modelled the properties of non-EM-SST and ...
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...
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...
Century Zn deposit–the world’s largest meteorite impacted orebody
- Publication Name: Australasian Exploration Geoscience Conference
- Authors: Finbarr Murphy*, Terry Lees, Andrew Tomkins, Damian O’Donohue
- Date Published: September 2019
Abstract:
We describe how the world-class Proterozoic Century zinc deposit in northwest Queensland has been sculptured by an Ordovician meteorite impact, the Lawn Hill Impact Structure. The deposit is located at the SW edge of the crater, is dismembered by cra...
Reservoir flow modelling to constrain CO2 plume-fault interaction. South West Hub Carbon Capture and Storage Project, WA
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Laurent Langhi*, Ludovic Ricard, Julian Strand
- Date Published: September 2019
Abstract:
In order to improve the South West Hub Carbon Capture and Storage (SW Hub) site characterisation and reduce uncertainties around CO2 capacity, injectivity and containment, conceptual fault hydrodynamic models are defined and numerical simulations are...
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...
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...
Delineating cobalt targets from a galvanic and inductive source Sub-Audio Magnetics (SAM) at the Carlow Castle project, Western Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Daniel Eremenco*, Russell Mortimer, Ed Mead
- Date Published: September 2019
Abstract:
The Carlow Castle deposit is located 40 kilometres east of Karratha, Western Australia. The deposit is shear hosted in the Ruth Well Mafic Formation, part of the Roebourne Group. It is interspersed with metagabbro intrusions and brecciated chert cata...
Bayesian geophysical inversion with Gaussian process machine learning and trans-D Markov chain Monte Carlo
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Anandaroop Ray*, David Myer
- Date Published: September 2019
Abstract:
A key aspect of geophysical inversion is the ability to model the earth with a low dimensional representation. There exist various approaches to solve the inverse problem. However, most methods do not automatically adapt inverse model complexity or t...
New insights into the Exmouth Sub-basin from basin and petroleum system modelling
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Oliver Schenk, Craig Dempsey*, Robbie Benson, Michael Cheng, Sugandha Tewari, Alexander Karvelas, Giuseppe Bancalà
- Date Published: September 2019
Abstract:
The Exmouth Sub-basin forms part of the intra-cratonic rift system of the Northern Carnarvon Basin, Australia. It has undergone a complex tectonic history with multiple phases of uplift, erosion, inversion, and regional tilting. Hydrocarbon explorati...
pXRF assessment of new magmatic fertility indicators in the Macquarie Arc
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Tristan Wells*, Sebastien Meffre, David Cooke, Jefferey Steadman, Jonathon Hoye
- Date Published: September 2019
Abstract:
This research presents a new method for assessing magmatic fertility using pXRF in altered terranes using Zr and Y ratios. A study of global batholith related mineralised porphyries, highlights a low Zr fractionation trend. The depletion in Zr is ass...
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...
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...
DHEM at Las Cruces, Spain – successes and failures
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Gavin R. Selfe*
- Date Published: September 2019
Abstract:
Downhole electromagnetic (DHEM) logging was undertaken within four holes drilled at the Las Cruces VMS body in Spain. The geology of the deposit is geophysically complex inasmuch as the background and overlying geology is conductive. A number of loop...