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Collaboratively Answering Australia’s Geoscience Questions.

CEO’s Update – February 2018

Dear AuScope’ers

Welcome to our first newsletter of 2018.  This year the National Committee for Earth Sciences, at the Australian Academy of Science, will publish a Decadal Plan for Australian Geoscience outlining the challenges and opportunities that our community will face over the coming decade. The document will highlight the rapid rate of change that we will face with respect to technology, data volumes, and approaches to undertaking geoscience research – a decade of transition.

At AuScope we are preparing for this change as well. You will no doubt have noticed changes to the “look and feel” of our media. This helps to articulate AuScope’s new communications strategy, which in turn, marks its first, small transition to providing the research infrastructure that will ensure that the earth and geospatial sciences continue to thrive and deliver impact and value for all Australians.  AuScope 2.0 if you like.

To this end, and in anticipation of new funding to support the recommendations of the Chief Scientist’s National Research Infrastructure Roadmap, AuScope will be focussing on developing a detailed strategy for new investment over the coming decade during 2018. 

One event that we would like interested parties to be aware of is a workshop that we will host following the AGCC meeting in Adelaide on Friday the 19th of October.  More details will follow but please keep this day free if you would like to be involved in the discussion, and register your interest here to receive updates. 

Cheers, Tim

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AuScope Travel Bursaries Take Flight

In 2016, AuScope awarded three $10,000 travel bursaries to researchers for their outstanding contribution to science using AuScope infrastructure. We caught up with Dr. Simon Johnson, Associate Prof. Hrvoje Tkalčić, and Gary Johnson to learn about the ongoing impact of their travels.


Dr. Simon Johnson of the Geological Survey of WA: Application of Science Award

Outcrop of Cretaceous-aged high-grade magmatic paragneiss (Swakane Gneiss) within the North Casacades crystalline core, with geologist for scale. Image: Dr Simon Johnson.

Dr. Simon Johnson was awarded for his role in leading the seven-year, Deep Crustal Structure of the Capricorn Orogen program, a successful, collaborative project that combined diverse expertise and geological datasets which resulted in enhanced mineral resource prospectivity for the region (Johnson et al., 2013; Fielding et al., 2017). With this bursary, Simon was able to present program results at the Geological Society of America conference (GSA2017) in Seattle, Washington in late October 2017.

The multi-themed, multi-disciplinary GSA2017 conference bought together over 4000 delegates, presenting at 393 technical sessions, running concurrently over four days. And it catered for the widest range of topics possible from hard and soft rock geology of the Hadean to the present-day, through hydro and environmental geology to lunar, Martian and extra-terrestrial geology.

The work presented by Dr Johnson was well received with particular interest from exploration geologists and geophysicists who were amazed at how many different datasets had been produced and integrated to provide such an unprecedented view of the Capricorn Orogen crust. The datasets included both active and passive seismic, magnetotelluric, magnetic and gravity data as well as extensive geochronological, isotopic and geochemical data.

The funding also allowed Dr Johnson to attend a three-day pre-conference field trip through the North Cascades volcanic arc to examine how sedimentary rocks are incorporated into the mid-crustal portions of active arc systems.

This trip was particularly relevant to the geological history of the Capricorn Orogen as it provided a well-exposed, well-studied Phanerozoic equivalent to the Paleoproterozoic Dalgaringa Arc that also contains abundant metasedimentary enclaves, some containing over a million ounces of gold (Roche et al., 2016).

Although the weather was cold and particularly wet, with some snow at altitude, the field trip was extremely well run and provided a great insight into the living dynamics of active arc systems.

The trip provided answers to some long-lived questions about the regional-scale geological evolution of the Capricorn Orogen that previously could not be answered due to the strongly deformed and deeply dissected nature of this part of the orogen. In particular it highlighted how apparently inconspicuous faults may in fact be major crustal structures that have accommodated thousands of km’s of transpressional displacement during active arc magmatism.

Dr Johnson greatly appreciates the funding provided by AuScope in order to attend and present at GSA 2017 and hopes that the ‘Team Australia’ collaboration can continue for many years to come.

 

References:

Fielding, IOH., Johnson, SP., Zi, J-W., Rasmussen, B., Muhling, JR., Dunkley, DJ., Sheppard, S., Wingate, MTD and Rogers, JR. 2017. Using In Situ SHRIMP U-Pb Monazite and Xenotime Geochronology to Determine the Age of Orogenic Gold Mineralization: An Example from the Paulsens Mine, Southern Pilbara Craton. Economic Geology 112, p. 1205–1230.

Johnson, SP., Thorne, AM., Tyler, IM., Korsch, RJ., Kennett, BLN., Cutten, HN., Goodwin, J., Blay, O., Blewett, RS., Joly, A., Dentith, MC., Aitken, ARA., Holzschuh, J., Salmon, M., Reading, A., Heinson, G., Boren, G., Ross, J., Costelloe, RD and Fomin, T. 2013. Crustal architecture of the Capricorn Orogen, Western Australia and associated metallogeny. Australian Journal of Earth Sciences 60, p. 681–705.

Roche, LK., Korhonen, FJ., Johnson, SP., Wingate, MTD., Hancock, EA., Dunkley, DJ., Zi, J-W., Rasmussen, B., Muhling, JR., Occhipinti, S., Dunbar, M and Goldsworthy, J. 2017. The evolution of a Precambrian arc-related granulite facies gold deposit: Evidence from the Glenburgh deposit, Western Australia. Precambrian Research 290, p. 63–85.

 


Associate Prof. Hrvoje Tkalčić of ANU: Excellence in Research Achievement Award

 

Excerpt from the cover of Associate Prof. Hrvoje Tkalčić’s The Earth’s Inner Core book, which culminates his recent years of work. Image: Associate Prof. Hrvoje Tkalčić.

Last year, we learned of Associate Prof. Hrvoje Tkalčić’s Massachusetts-Madrid-Zagreb-Seoul trip to communicate and promote his award-winning work on Earth’s core, and conduct collaborative research on the same topic. Hrvoje will soon wind up from his travel circuit with research presentations in Kobe and Perth this year.

Funded travel opportunities, such as these, are critical for scientists, explains Hrvoje. Researchers must “receive feedback from their fellow researchers and help maintaining reputation of their and their’s group research.”

Additionally, he says these opportunities to promote Australian research are invaluable. “I am sure that helped contribute to informing the world’s geophysical community that there is a program in Australia that is unique but at the same time similar in scope to EarthScope and other initiatives worldwide.”

Since his trips, Hrvoje has noticed an increased number of high-quality PhD applications from overseas, and also an increased interest of international colleagues to visit his ANU research group in Australia.

“…it is highly likely that the Award contributed significantly in increasing my national and international reputation.” Hrvoje remarks.

Awards like AuScope’s help Hrvoje to continue pursuing blue skies research, which, he says “is extremely important in today’s project-driven environment and universities adopting corporate management models.”

“Risk taking fundamental research in global seismology and tackling big unanswered questions is what I attribute most success of my career in geophysics to so far” he says.

“AuScope with its facilities and seismological data, recorded and collected, goes hand-in-hand with my research in global seismology.”

Hrvoje’s research has led to a recent discovery of Earth’s correlation wavefield, which provides a new view of the Earth’s seismic wavefield, and will have major repercussions for the field of seismology and Earth imaging. Be sure to stay tuned for updates on this topic of great international interest.

Next, he hopes to deploy an onshore-offshore seismic experiment near the MacQuarie Ridge Complex in the Southern Ocean, which would include recently purchased, AuScope Ocean Bottom Seismometers.

The newly collected data will elucidate the processes generating the world’s largest submarine earthquakes not associated with active subduction, and illuminate exhumation of normal oceanic lithosphere.

Project outcomes will impact earthquake and tsunami hazard assessment, benefitting policy-makers and at–risk communities along the southeast Australia coastline. Furthermore, the global Earth science community will benefit from insights on how plate boundaries evolve.

Discover Hrvoje’s career research achievements here.


Gary Johnson of Geoscience Australia: AuScope Collaboration Award

Attendees at Geoscience Australia’s GNSS workshop in 2017. Image: John Dawson.

Gary Johnson was awarded with the AuScope Collaboration bursary for work on the GNSS Network, which provides the geodetic framework for the spatial data infrastructure in Australia and its territories. Geoscience Australia use the AuScope award funding to host a 2-day workshop on Australia’s GNSS infrastructure.

Attendees from State and Territory land and survey agencies were funded to come to Canberra to meet with Geoscience Australia, private sector positioning service providers and GNSS researchers. The workshop enabled some reflection on the progress and the successes of the AuScope GNSS project, identify future challenges and opportunities, and plan for the future of Australia’s National Positioning Infrastructure (NPI).

The Workshop reviewed implementation details of Australia’s new national datum which was underpinned by AuScope’s GNSS array. This national datum update will help ensure all spatial and mapping data in Australia remains current for the foreseeable future. 

The attendees learnt how the AuScope GNSS array is finding wide application in positioning applications particularly in the agricultural sector where it used for machinery guidance and the operation of Unmanned Aerial Vehicles (UAVs).

The group also discussed the future challenge of using the AuScope GNSS array for applications in automated and intelligent cars, and learnt about how the GNSS array is being used to support the Australian and New Zealand government’s testing of a Satellite-Based Augmentation System (SBAS).

This project has already improved the performance of GPS for all Australians from 2-5 metres accuracy to around 0.5 metre accuracy. At the time of writing (with plans to test a 10cm accurate positioning service in the coming months.

 


Watch animations of all award winning projects here.

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ANU Pack Up Seismic Array in Stunning, Outback SW Queensland

In October 2017, Australian National University’s (ANU) seismology team conducted a final tour of southwest Queensland, removing seismometers that had been recording local and global earthquakes. The scene was remarkable.

As you can see from Sam Rayapaty’s drone video, the field team were treated to beautiful but remote SW Queensland Channel country, as they packed up the seismometers.

ANU researchers take a bird’s eye view of a seismometer site in southwest Queensland Image: Dr Sam Rayapaty.

The array had recorded the last North Korean Nuclear blast: the seismic waves from that blast as they travelled past Queensland. The figure below shows the ground shaking at the sites that were still operational at the time. The waves arrive at the northern end of the array about 10 minutes after the blast and can be seen arriving at the southern end around a minute later.

Figure showing the ground shaking at the sites that were still operational at the time. The waves arrive at the northern end of the array about 10 minutes after the blast and can be seen arriving at the southern end around a minute later. Figure: Dr. Michelle Salmon, ANU.

 


Learn more about AuScope’s Earth Imaging program

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If The Old Model Doesn’t Fit, Build A New One

The 2016 Peterman Ranges earthquake has questioned the established model for intraplate environments, as one of the periodic events occurring on active faults. The work of all the collaborators in this research, Geoscience Australia, University of Melbourne and the Australian National University, as well as South Australia’s  Department of State Development, the Defence Science Technology Group and Seismology Research Centre, is now helping to underpin an evolution in the understanding of this crustal behaviour so as the improve seismic hazard assessments across our vast continent.

Late in 2017, a year and a half since the May 2016 Magnitude 6.1 Petermann Ranges earthquake in the Northern Territory, Dan Clark from Geoscience Australia’s Community Safety Division spoke at length on the extraordinary geological findings now being revealed about this event as aftershock data gradually reveals an increasingly complex story. As part of Geoscience Australia’s Distinguished Lecturer Series, Dan described how the developing data set – derived from aftershock measurements – begins to define a previously unanticipated intraplate earthquake of significant magnitude.

InSAR interferogram generated from ALOS-2 images captured before (15 December 2015) and after (14 June 2016) the Petermann Ranges earthquake reveals the spatial pattern of ground surface movement caused by the earthquake. ALOS-2 data is provided by JAXA through RA4 project 1133. Figure: Dr. Dan Clark, Geoscience Australia.

Using the results of over 200 aftershock events captured with high resolution instruments (with a location uncertainty of only 200m!) and analysed by Gary Gibson (Seismology Principal Research Fellow with the University of Melbourne), it has become clear that not only was the location of the epicentre unanticipated, but so was the fault structure and the resultant ground motion. And, the rock types making up the near-surface geology held none of the expected evidence of past earthquakes.

Cracking along the fault Scarp, Petermann Ranges resulting from the Mw6.0 earthquake of 2016. Image: Dr. Dan Clark, Geoscience Australia.

This has led to new conceptual models being built to explain the occurrence of these earthquakes. These models are critical to understanding the long-term behaviour of earthquakes in the Australian landscape and have a direct contribution to future national seismic hazard assessments that underpin earthquake-resilient building construction in Australia.

For more information, contact:

Dr. Dave Belton 
Project Manager  |  3:34 Shallow Earth Monitoring & Petrophysics
AuScope Subsurface Observatory  |  University of Melbourne

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Continental Breakup Triggering Massive CO2, GHG Emissions

This article is written by the EarthByte Group and was first published on the EarthByte website.


Currently, human activity is the primary driver of elevating atmospheric CO2, but the Earth fluctuated from greenhouse to icehouse conditions and back long before humans existed. The question is:  what triggered these long-term climate cycles? 

Now research at the University of Sydney’s EarthByte Group, in collaboration with the German Research Centre for Geosciences, reveals how a supercontinent’s life cycle drives CO2 emissions and climate change over geological time. Their model is published today in the journal Nature Geoscience.

With the help of computer simulations of supercontinent breakup and carbon cycle models supported by the Sydney Informatics Hub, the team uncovered how the gradual breaking up of continents triggers enhanced CO2 emissions through deep crustal fault systems.

One of the best studied examples of the initiation of continental breakup is the East African Rift, a region near the horn of East Africa where the crust stretches and splits. The sampling of carbon dioxide seeping from the soils in this area has shown that this continental rift releases substantial amounts of CO2 into the atmosphere, mainly derived from the Earth’s deep mantle.

The Australian-German research team used published field measurements of CO2 degassing along the East African rift zone to calibrate a model of carbon emissions during continental breakup.

First, they built a digital model of all rifts that formed while the supercontinent Pangea started breaking up around 200 million years ago.

Before the continents formed as we know them today, an extensive network of rift zones formed within Pangea. They looked like an interconnected system of zippers along where the crust was faulted and thinned before breaking completely.

Next, the team used a global carbon cycle model to simulate the effect of CO2 emissions along Pangea’s rift systems through time.  They found that two periods of extensive continental rifting from 160 to 100 million years ago and after 55 million years ago coincided with greenhouse climate episodes, during which atmospheric CO2 concentrations were more than three times higher than today.

Professor Dietmar Müller said: “We have been able to demonstrate that continental fragmentation and long-term climate change is linked via massive CO2 degassing along crustal faults in rift systems.

“This provides a direct link between Earth’s supercontinental cycles and fluctuations between greenhouse and icehouse climates. Continental rifting and breakup may play a key role in ending pronounced ice ages in the geological record.”

He said climate models of the geological past were used to understand better the possible future evolutionary paths of our planet.

“In order to use geological models to make inferences for the future, we need to understand all the phenomena that contribute to climate change in the long run.  This is where the importance of our research lies, and there are still a number of other tectonic factors influencing CO2 emissions or sequestration that are currently not well understood.”

Lead author Dr Sascha Brune, from the German Research Centre for Geosciences, said: “Future work will extend these models much further, quantifying the contributions of other deep carbon cycle components, like weathering of basalt from massive volcanic eruptions, erosion of mountain chains and the role of the creation and destruction of ocean crust in driving atmospheric CO2 fluctuations.”

Professor Simon Ringer, who oversees the University of Sydney’s core research facilities, said: “This work reflects a new way of doing science, re-using published research data and software, and developing open-source community software to synthesise and model geodata in space and time.

“Key elements to make this research possible are centralised computing and data science services via our Sydney Informatics Hub”.

This research is supported by the Australian Research Council and industry-funded Basin Genesis Hub, which Professor Müller heads at the University of Sydney.

The five-year project aims to improve our understanding of the evolution of sedimentary basins and continental margins by connecting multi-disciplinary data analysis and high-performance computing in an open-innovation framework.

To view the continental breakup process in action, visit the Virtual Earth Laboratory (best viewed in Google Chrome), created by the EarthByte Group headquartered at the School of Geosciences. Here, you can play back the evolution of continental rift systems in four dimensions (3D space and time). You can also follow EarthByte’s research activities on Facebook and Twitter.

The paper, “Potential links between continental rifting, CO2 degassing and climate change through time” appeared in Nature Geoscience on Monday 13 Nov. 2017.

 

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Heat flow and inferred ground surface temperature history at Tynong North, SE Australia

G. Beardsmore, M. Sandiford, K. Gordon, M. McLean, S. Egan & S. McLaren (2017) Heat flow and inferred ground surface temperature history at Tynong North, southeastern Australia, Australian Journal of Earth Sciences, 64:6, 753-767, DOI: 10.1080/08120099.2017.1362663


Borehole temperature data have the potential to record historical variations in ground and air surface temperature, yet very few reliable, purpose-drilled, boreholes are available to explore such impacts, particularly in the southern hemisphere. The 400-m deep Tynong-1 borehole, approximately 65 km ESE of Melbourne, Australia, was drilled specifically to determine conductive heat flow and provides a unique dataset for evaluating ground surface temperature history in southeastern Australia.

Steady-state conductive heat flow of 87 ± 1 mWm-2 was determined in the deeper borehole sections, with measured temperature profiles clearly demonstrating a progressive divergence of the observed temperature profile from the equilibrium model in the upper ~150 m of the hole.

We applied a Bayesian method employing a reverse jump Markov chain Monte Carlo search algorithm to explore the origins of this variation. Our results indicate a 2°C increase in ground surface temperature since 1800, after at least 500 years of relatively stable ground surface temperature.

The inversion results are consistent with the trend of surface air temperature recorded in southeast Victoria by historical meteorological data since 1950. The inferred increase in ground surface temperature evident prior to 1950 is likely a cumulative effect of land clearing and a rise in surface air temperature.

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Underworld2 Training Lab In The Cloud

AuScope Simulation and Modelling has built some of the world’s most sophisticated research codes that, in the hands of expert researchers, have been behind many high impact scientific discoveries.  This year, a team from AuScope GRID set themselves the challenge to make these cutting-edge software tools available in the cloud for researchers in industry and university students to use.

There is continued high demand for geoscience analytics research and the software and infrastructure to support it. Researchers and organisations creating the algorithms and products share a common need to foster the publication, sharing, use, and citation of their research and outcomes.

A recent collaboration between the AuScope GRID project at CSIRO led by Rob Woodcock and the Underworld team at the University of Melbourne led by Louis Moresi developed a prototype of a system that can provide on-demand hosting of scientific software environments, initially for training and workshops. An environment for training with the Underworld modelling software was demonstrated at the AGU fall meeting in New Orleans in December 2017 and has been trialled with small (10-20 participants) groups. It is currently available to experiment with at https://underworld.geoanalytics.csiro.au.

The system was developed to satisfy several requirements:

  1. Interface and software environment easily customizable by the instructor
  2. Identical software stack for every user
  3. Environment that can be taken away and reused by the student after the course
  4. Robust authentication and isolation for users
  5. Scalability from a few students in a class to thousands of people remotely
  6. Cross-platform and cross-device access by users
  7. Straightforward for the instructor to set up a workshop

The underworld code was developed for modelling plate-scale fluid mechanics and studying problems in lithosphere dynamics. Though specialized for this task, underworld has a straightforward python user interface that allows it to run within the environment of jupyter notebooks on a laptop (at modest resolution).

The python interface was developed for adaptability in addressing new research problems, but also lends itself to integration into a python-driven learning environment. To manage the heavy demands of installing and running underworld in a teaching laboratory the team developed a workflow that virtualizes the underworld environment as a docker container. This combination satisfies the first three requirements above.

JupyterHub was used to manage users and orchestrate their individual notebook instances. This provides the authentication and authorization layer in the system and makes the process of managing isolated environments transparent to the end user. Each user gets their own jupyter notebook instance and filesystem space to store their changes, results and any other persistent data.

The GRID team at CSIRO developed the system that provisions and manages the workshop environments, combining the technologies described above with the low-level infrastructure required to host the workshop in the cloud, specifically the Amazon cloud for this demo. Running the software in the cloud, and exposing it via a web interface, enables both scalability and cross-platform remote access.

Finally, the system allows the instructor to update their software environment by publishing a new version of the Docker image, tailored for a specific workshop or another purpose. Work is ongoing to simplify and automate this process, and also allowing the instructor to specify the resources they require for a workshop so that the system can take care of provisioning cloud resources as needed.

While underworld was used for this prototype, the approach can be used as is with any Jupyter notebook environment that can be encapsulated in a Docker image. Ongoing work will explore how it can be applied to other software coming out of AuScope Simulation Analysis and Modelling projects, simplifying and automating the publication of new or updated software environments and the specification of resource requirements for a specific workshop, and how this approach could be used to automate the deployment of software for other (non-workshop) use-cases.

 

 

Underworld accessed in the cloud from a laptop, tablet or even a phone has a familiar interface and can run all of the example problems from the underworld tutorial. User Experience, clockwise from left: (1) jupyter notebook in a web browser (local, container, or cloud), (2) notebooks threaded through html content and served by jupyter (local, docker or cloud), (3) command line access through python / ipython scripting – the only way to access underworld in a queue-controlled supercomputing environment but can be used on a local build, container or through the jupyter terminal app. (4) cloud access via tablet or phone devices where no local computation is available. 

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CEO’s Welcome

Gravity visualisation on earth’s surface rendered in GPlates desktop software. Image: Dietmar Muller, EarthByte Group at the School of Geosciences, The University of Sydney.

Dear AuScope community,

It has been a busy but exciting couple of months since our last update in May 2017. We have started a new financial year and with it a new funding cycle. We are currently operating with two years of NCRIS funding from the Commonwealth which is allowing us to take some time to assess our current programs and the AuScope model in general, as well as do some strategic planning for the coming five and ten-year periods and finally, to the fill some of the gaps in our current eResearch architecture.

The delivery of the Chief Scientist’s National Research Infrastructure Roadmap has led to the initiation of an implementation planning activity within the Departments of Education and Industry involving gathering data about current infrastructure capacity and possible future funding levels – a process that AuScope has been actively contributing to. Thank you again to those that helped us put together our submissions to this activity.

We are also excited to welcome a new member to the AuScope team. Jo Condon has started as the new Marketing and Communications Manager based in the Melbourne office. I would like to welcome Jo and I am sure that many of you will interact with her in some way over the coming months. If you have any material for our communications, or anything that you would like to promote, please do not hesitate to get in touch with her at jo@auscope.org.au.

I would also like to congratulate AuScope SAM (Simulation, Analysis, Modelling) Program Director, Louis Moresi, who has been awarded American Geophysical Union Fellowship for exceptional contribution to Earth and Space Science.  A very well-deserved honour.

Tim Rawling

 


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To The Future

 

 

Australia’s decadal plan for Earth Sciences is currently under development. Illustration:  The Australian Academy Of Science.

How do we best manage Australia’s natural resources like minerals, energy, water and soils? Together with the Australian Academy of Science, AuScope prepares the Decadal Plan For Earth Sciences plan, which is designed to ensure that research positively impacts the nation’s environmental state and prosperity.

This project follows on from the last decadal plan for Earth Sciences, Geoscience—Unearthing our future, which was released in 2003. It brought about a period of significant scientific advance in our sector, built on well-funded research programs, and underpinned by significant investment in research infrastructure through the NCRIS and EIF schemes.

To continue momentum, and ensure alignment between our strategic plan and the national decadal plan, Auscope has actively contributed to its development. A draft version is available for your review, please do not hesitate to contact Tim Rawling by email at tim.rawling@unimelb.edu.au.


Keep informed about the progress of the decadal plan at The Australian Academy Of Science

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Petrophysical Data Online

Map showing Victoria’s geological provinces and sampling points (blue dots) where recent petrophysical data has been collected. Data will be used to develop a picture of structural, mineralogical and thermal anomalies across the state, and is now available on the AuScope Portal.

The future of Australia’s mineral exploration success lies in successfully exploring under the 80% of the continent that is covered by regolith, or sediments. AuScope’s Subsurface Observation (formerly AGOS) team and partners have just added a new data piece to the puzzle.

With the help of Dr Robert Woodcock and his team at CSIRO, AuScope’s Subsurface Observation team, led by Dr. David Belton at the University of Melbourne, have been able to optimise recently-updated software for delivering charted petrophysical data onto the AuScope Portal, in order to provide ready access to this data for members of the geoscience community.

The team have completed uploading borehole petrophysics results for 4500 metres of diamond core representing 50 sites, the bulk of which sample subsurface geology in Victoria. These boreholes aimed to investigate structural, mineralogical and thermal anomalies.

A total of 27 holes delivered extensive meterage (average 160 metres per hole) in basement lithologies and provide a comprehensive picture of the subsurface physical properties including density, p-wave velocity, resistivity, magnetic susceptibility as well as natural gamma output.  A further 22 sites were sampled for strategically important lithologies of interest in geothermal studies. Many of these sites also underwent comprehensive thermal conductivity analyses.

Petrophysical-Log-Example

Example of graphed petrophysical data that is now available on the AuScope Portal. Viewing data in this way allows geologists to determine areas of interest downhole, based on anomalies between datasets. For example, a spike in magnetic susceptibility, ‘Mag. sus.’ and ‘Resistivity’ may indicate the presence of metallic mineralogy, which may spark further investigation to determine whether it is possibly ore-bearing.

This component milestone culminates a number of different projects with CSIRO, Geoscience Australia and the Geological Survey of Victoria, whose various aims include:

  • Developing new drilling techniques, such as sonic drilling
  • Expanding the amount and type of datasets, from lithogeochemical to extended petrophysical data, for improved mineral exploration vectoring
  • Verifying surface and downhole geophysical data collection technologies, which vastly improves modelling of geophysical data
  • Geothermal exploration

To view graphical petrophysical data, please visit the AuScope Portal. To access raw petrophysical and seismic data, please get in touch with project leader Dr. David Belton at dxbelton@unimelb.edu.au.

 


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