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ASEG Qld: Student Welcome and Social Evening

Thursday, February 16, 2023

The first Australian Society of Exploration Geophysicists (ASEG) QLD branch event for the year will be a student welcome and social evening, generously supported by Anglo American.

Please join us to learn about geophysics and what ASEG does, catch up with other geophysicists and enjoy some musical entertainment.

When: From 4pm on Thursday 16th February

Where: Stock Exchange Hotel, 166 Charlotte Street, Brisbane (upstairs in the Charlotte room)

Cost: Free for members and students and $20 for non-members; includes food and two free drinks

RSVP by 10/02/22 to recieve your drinks!

Exploring the structure, composition and resources of the New Caledonia peridotite ophiolite (SW Pacific): Contributions of geophysics and land-to-sea drilling

Monday, February 13, 2023

Title: Exploring the structure, composition and resources of the New Caledonia peridotite ophiolite (SW Pacific): Contributions of geophysics and land-to-sea drilling

Presenter: Marguerite Godard

Date: Monday 13th February 2023

Time: 6:00 pm to 7:00 pm AEDT



The New Caledonia (NC) ophiolite extends over more than 900 km at the northeastern limits of the Zealandia submerged continent, along the Australia – Pacific convergent plate boundary. It comprises large peridotite massifs forming the Island of Grande Terre (GT) and its recently discovered off-shore extension to the south. The subaerial NC ophiolite is of strategic importance for mineral resources (mainly Ni, Cr and Co from peridotites). Several subaerial and submarine alkaline, and H2-rich hydrothermal vents are observed along the NC ophiolite, the most famous being the Prony Bay Hydrothermal Field. The New Caledonia Ophiolite Land-to-Sea Drilling Project (NCDP), submitted to the International Continental Scientific Program (ICDP) and the International Ocean Discovery Program (IODP), aims at (1) sampling the peridotites and associated lithologies on-land, in coastal waters, and the deep oceanic sub-seafloor, and (2) developing borehole observatories to measure in situ the hydrogeological and (bio-)geochemical processes controlling serpentinization driven hydrothermal systems from continental to marine environments. NCDP will provide a unique sampling to quantify interplays between serpentinization, H2 production, CO2 mineralization and ore mobilization over the different stages of obduction.


Dr. Marguerite Godard is Senior Researcher at the French National Centre for Scientific Research. She is a geochemist, specialist of the study of magma- and fluid-peridotite interactions in the oceanic and ophiolitic lithosphere; she (co-)authored more than 100 publications in international scientific reviews and books. She coordinated and participated to several European and French academic and industrial projects on serpentinization and carbon trapping in peridotite basements and their impact on resources, environment and life (e.g., TotalEnergies 2017-2021; ANR LISZT 2018-2023). M. Godard is one of the main PIs of the New Caledonia Ophiolite Land-to-Sea Drilling Project.

ASEG Annual General Meeting

Friday, March 17, 2023
12:30 pm AEST
13:30 pm AEST

More details to follow

WA: Industry Mentoring Program Sundowner

Tuesday, November 29, 2022

Industry Mentoring Program Sundowner


When: Tuesday, 29th November 2022 5:30-7:30pm

Location: The Globe, 495/497 Wellington St, Perth

Cost: $10 for members of any of the participating associations

Ticket sales close Monday 28th November 5pm


The joint Industry Mentoring Program is a collaboration between nine professional associations: Petroleum Exploration Society of Australia (PESA), Australian Society for Exploration Geophysicists (ASEG), Energy Club of WA (ECWA), Society of Petroleum Engineers (SPE), Engineers Australia (EA), Society for Underwater Technology (SUT) and Subsea Energy Australia (SEA), and Professional Petroleum Data Management Association (PPDM).

We’re inviting the members of the participating associations to join us for the mentoring program wrap-up. This will be an opportunity to network with mentors, mentees, and members of the participating clubs and associations. There will be networking activities, nibbles and drinks to encourage meaningful networking and connections in a friendly environment.

VIC Talk: Future Imperfect - Where Should Exploration Be Headed in The Next 25yrs?

Tuesday, November 22, 2022

Title: Future Imperfect - Where Should Exploration Be Headed in The Next 25yrs?

Presenter: Ken Witherly

Date and Time: Tuesday 22nd of November from 6pm

Location: The Kelvin Club



Bio: Ken Witherly graduated from UBC (Vancouver, Canada) with a BSc in geophysics and physics in 1971. He then spent 27 years with the Utah/BHP Minerals company during which time as Chief Geophysicist, he championed BHP’s programs in airborne geophysics which resulted in the development of the MegaTEM and FALCON technologies. In 1999, Ken helped form a technology-focused service company that specialises in the application of innovative processing and data analysis to help drive the discovery of new mineral deposits. In 2017, he helped establish the Women Geoscientists of Canada, a group dedicated to support early career women in the minerals industry.

Note: light refreshments will be served at this event.

SA Branch: Electrical characteristics of porphyry copper deposits

Wednesday, November 23, 2022

Title: Challenging land seismic surveys, from design to implementation to imaging

Presenter: Ken Witherly

Location: Thomas Cooper Room, Coopers Alehouse, 316 Pulteney St, Adelaide

Date: Wednesday 23rd November

Time: 5:30 pm for a 6:15 pm start

Cost: Members & students free, non-members $10, includes finger food & drinks


It is my pleasure to invite you to our upcoming technical event, on Wednesday 23th November at 5:30 pm for a 6:15 pm start at the Thomas Cooper Room, Coopers Alehouse.

We have Ken Witherly from Condor Consulting speaking on ‘Electrical characteristics of porphyry copper deposits


Electrical methods have been applied to the search for porphyry copper and IOCG deposits since the early 1950s.  While there is a generally accepted model of disseminated sulfides giving rise to a chargeability response, no clear association has been attached to what EM surveys may be responding to. Work in the early 1990s (Nickson 1993) showed the well-developed supergene blankets over a porphyry copper could be conductive; this observation was
however, never applied formally to generally accepted porphyry targeting models. The presence of other conductive zones associated with porphyry copper deposits is even less well studied. On the geological side, while there is a vast body of literature describing porphyry copper deposits and how to discover them, in very few cases do these studies even speculate if anomalous concentrations of sulfides could be conductive. On the geophysical side, observations of unexpected conductivity associated with porphyry systems is sometimes noted but these observations typically stop short of suggesting that there could be a more general observation made that a new class of geophysical feature should be defined. The present study is felt to have gathered a sufficient number of case studies which show that a significant number of porphyry copper deposits posse a mineralogical character which can be identified with EM techniques. This thesis can have significant implications as to how porphyry copper are explored for, especially those at depths >500 m, a generally accepted cut-off for IP techniques.


Ken Witherly graduated from UBC (Vancouver Canada) with a BSc in geophysics and physics in 1971.

He then spent 27 years with the Utah/BHP Minerals company during which time as Chief Geophysicist, he championed BHP’s programs in airborne geophysics which resulted in the development of the MegaTEM and Falcon technologies. In 1999, Ken helped form a technology-focused service company that specializes in the application of innovative processing and data analysis to help drive the discovery of new mineral deposits. In 2017, he helped establish the Women Geoscientists of Canada, a group dedicated to support early career women in the minerals industry.

NSW Branch: Special Presentation by Ken Witherly and Annual Student Night

Wednesday, November 16, 2022

ASEG NSW November Meeting

Time and Date: 5:30 for 6pm start, Wednesday 16 th November 2022
Location: Club York, 99 York Street, Sydney

This year, our November technical meeting will consist of two parts:
Special Presentation: By Ken Witherly (Condor Consulting, Inc)
The Greatest Obstacle to Discovery Is Not Ignorance - It Is the Illusion of Knowledge.

Annual Student Night:

Recipients of the 2022 student scholarship will present their research:

Mackenzie Baker (UNSW) - Australia Going Under: Mantle processes and their geomorphological and biogeographical implications.
Eric Wang (USYD) - Seismic Hazard and Risk Modelling in Sydney.

Talk Overviews:

The Greatest Obstacle to Discovery Is Not Ignorance - It Is the Illusion of Knowledge

The title of this piece I term the Paradox of Discovery, has been attributed to Daniel J. Boorstin, Stephen Hawking, Henry Thomas Buckle, William H. Whyte, Anonymous and others. Like so many “quotes” available on the Internet, no one knows for sure who said it, why she or he said it, and what it really means, if it was said at all. My journey to ‘discovering’ this adage had me assembling a string of words that in a rough way, replicated the expression I found was a good encapsulation of what I was trying to express. After a relatively short time, the text as shown emerged. So for me, what does this expression convey? First, I was trying to find something which could capture how I feel about the 50 year career I have had in minerals exploration as a geophysicist. Specifically, could I convey what I feel has been the greatest obstacle to success; mostly typically the discovery of new mineral resources. To achieve this outcome, we typically rely on data which either we have caused to be gathered or is available due to the work of others. The data you generate is typically thought as being the ‘best guess’ of what is required to make the discovery for a certain deposit model which you have either accepted based on work of others or that you developed. The data you acquire is expensive compared with preexisting data and will often require time to decide what data is required, the definition and justification of budgets to pay for the work and then the impact of the time for planning, field preparation, acquisition and assessment, followed finally by the execution of a field program. Data acquired by others, while relatively inexpensive compared with ‘acquired for purpose’ data, is not likely carrying the critical information required to build a working hypothesis as to whether an unknown mineral deposit is located in the location you have deemed prospective. There is a commonly held belief in minerals exploration that when the same information is presented to different groups, the same outcome is most likely. So if previous explorers failed to locate a deposit using a given data set, other explorers are not likely to do any better. Collective industry experience suggests that the same data needs to be reviewed by five groups before a discovery is likely. This can be where the illusion of knowledge can first appear. This is a person’s or group’s belief that they possess some unique knowledge beyond the factual information available which will enable them to make better decisions that others with the same data. Can such data actually exist? Yes but its very nature can make our understanding and value of such data very difficult. Unless such knowledge is validated, the assessment process can be biased to the point that it is no longer a process whose outcomes are to be trusted. Moving past what might be called ‘dodgy data’, we can enter into the realm of ‘unknown unknown’ information. To pursue the discovery quest relying on such knowledge is inherently risky since the very nature or value of such information can be almost impossible to define.In the span of the 50 years I have pursued the discovery of new minerals deposits, the greatest gap in knowledge can only be termed ‘willful ignorance’ on the part of many of the fellow travelers in the exploration journey, those termed economic geologists who have not been able to appreciate the knowledge available to them which they chose to ignore or not take full advantage which geophysics can provide. Break this barrier down and the illusion of knowledge will be a manageable challenge and pursuing ‘unknown unknowns’ will be an enjoyable pastime.


Mackenzie Baker – Australia Going Under: Mantle processes and their geomorphological and biogeographical implications.

My project will assess the implications that tectonics, particularly dynamic uplift, intra-plate stress fields and palaeodrainage, has had on biogeography across the Australian continent. Australia has been chosen due to the intraplate setting that has made the continents tectonic activity relatively stable (Quigley et al., 2010; Sandiford, 2007). Throughout the history of Australian biogeography studies, climate has been frequently assumed as the main driver to biodiversification (Crisp et al., 2004). However, as we understand more about the connection between the mantle and the Earth’s surface, it becomes increasingly evident that alternative factors such as tectonics, must be considered in the biogeographical classification process (Ebach and Michaux, 2020). The previous narrative that climate acts as the main driver to bioregionalisation does not adequately explain the diversification of Australian species, river and drainage changes, nor does it fit into the climate schemes assumed by other continents that take on the equatorial climate approach (Ebach and Michaux, 2020). By studying the mantle and tectonic processes causing dynamic topography and other geomorphological changes, new constraints to the evolution of life on Earth can be gained. My project will examine the changes to the Australian landscape that have been brought about by tectonic and mantle processes since the Neogene (23.03Ma), including the continent-wide asymmetry of the Australian shorelines known as the ‘tilt’. As Australian traverses northward towards SE Asia, there are manifestations of geomorphological change that can be seen on the surface due to mantle processes. Previous studies of the Australian continent have determined a NNE down, SSW up, ‘tilt’ of the continent. The cause of this tilt has been determined to occur through mantle undulations causing dynamic topography. Due to this tilt, geomorphological changes have occurred on the surface, and can be seen through drainage changes, river reversals and sea level changes. As the continental surface is undergoing geomorphological change, the environments in which plant and animal species are situated upon are directly impacted by this and can be expected to alter the distributions of various species. Due to this, Australia provides an excellent canvas for studying the potential effects tectonics can have on the distributions of species across a given study area. The project will aim to determine this link through modelling the Australian continent from 40Ma to the present, using the PyBadlands software. By using PyBadlands, varying parameters of the Australian continent can be set and tested in order to reach conclusions about the relationship between tectonics and changes to the Australian landscape that may ultimately lead to changing of species distributions. 


Eric Wang (USYD) - Seismic Hazard and Risk Modelling in Sydney.

My Honours project is on seismic hazard and risk modelling for Sydney. Southeast Australia receives an alarmingly large number of low magnitude earthquakes. However, the 1989 Newcastle Earthquake and 2021 Mansfield Earthquake has shown that this area, and therefore Sydney, is vulnerable to moderate magnitude earthquakes, and increasingly so with growing population density. In 2018, Geoscience Australia created the National Seismic Hazard Assessment Map (NSHA18). It successfully integrates various datasets to allow for large-scale peak ground acceleration probability analysis, and it has found that Sydney is within a region of high seismicity (also known as the SE Seismic Zone). However, there are many variables for small-scale analysis it does not consider due to the enormity of the project such as elevation and seismic site conditions (i.e. soil/geological properties). Furthermore, it does not consider risk, the human vulnerability aspect, such as fatalities, economic loss, and infrastructure. As such, the aim of this project is to create local scale hazard models for Sydney, identify areas of high hazard, and create risk models (specifically targeted at infrastructure) for those areas. I aim to use OpenQuake by the Global Earthquake Model Foundation, an open-source software (python based) that has been used to create many national probabilistic seismic hazard maps such as in Italy, Canada, and Australia. In general, OpenQuake requires three input variables for their various hazard models: fault characteristics (fault location, dip, rake, etc.), ground motion models, and site conditions. Subsequent infrastructure data can be overlayed for risk analysis. All datasets are obtained from online sources such as government websites (e.g. Geoscience Australia) or journal articles. Below is a preliminary probabilistic seismic hazard analysis map for my thesis and it is the most common for determining seismic hazard of an area. It estimates the chance of sites to exceed a certain ground motion level (usually in peak ground acceleration). This is typically described by 10% probability of exceedance in a 50- year period or 1/475 annual exceedance probability. The figure shows two major areas of high hazard in Sydney: the Botany Bay area (east) and Yarramundi area (west). Botany Bay is an area of concern due to its high population density while Yarramundi is relatively less concerning as it is sparsely populated. Therefore, future risk models will be focused on Botany Bay, followed by Yarramundi if time permits.

Is there a seismic refraction signature for sulphide mineralisation?

Wednesday, October 19, 2022

On Tuesday 19th October, 6:00pm AEDT, ASEG NSW is bringing you a talk by Derecke Palmer (UNSW) titled Is there a seismic refraction signature for sulphide mineralisation?

Although I accepted retirement from UNSW almost two decades ago, I have continued with my longstanding research interests in near surface refraction seismology. The major theme of my research has been full trace processing. Inexorably, full trace processing leads into detailed model building with traveltimes and amplitudes. My presentation addresses three important questions.

The first is “Is there a seismic refraction signature for sulphide mineralisation at the base of the regolith?” The second is: “Will full waveform elastic inversion rapidly replace traveltime acoustic tomographic inversion, and become routine with most geotechnical investigations?” The third is: “Would a detailed analysis of the refraction component of selected regional reflection profiles recorded by GA be useful?” The presentation employs seismic data recorded by GA near a major operational gold mine.

Attendance is by joint Zoom virtual + physical presentation at Geoscience Australia.

Register Here:

Please bring your own drinks and nibbles if attending online.

ASEG WA Branch: 2022 AGM

Wednesday, November 30, 2022

2022 AGM

30th Nov, Shoe Bar, 5:30pm

More details to follow

ASEG WA Tech night: A Thread of Time - A history of IP

Friday, November 25, 2022

Nov Tech Night – Ken Witherley (Condor Consulting)

“A Thread of Time- A history of IP”

25th Nov, Celtic Club, 5:00pm


More details to follow