KEGS December talk

Please register for our December talk from link above.

Date:  Tuesday December 7th at 4:00 PM EST

Title:  More EM myths and Old-fashioned Methods.

Speaker: Greg Hodges, Senior Geophysicist at Sander Geophysics.


 

Abstract: There are a few myths about EM held by many people that deserve study. Some of them are a result of limited experience with either time or frequency domain EM, or limited experience with multiple geological environments. Other misconceptions come from thinking that the two different mathematical models, time domain and frequency-domain, make things happen differently in the earth. Don’t ever think that the model defines the earth – it only attempts to imitate it.

Are time domain EM and frequency domain EM the same thing, or different? The answer is: “Yes”. The earth is not frequency domain. The arrow of time is not oscillatory. But it is important to recognize that what you will see from the earth depends on how you look at it. The nature of the response depends on how you energize the earth and how you measure the response.

Debunking other myths: Current rings propagate downward with time, but that doesn’t always mean that depth correlates to time of the response. Calculating new parameters from the same data is not adding new information. B-field from a coil is not really B-field. In-phase is real, but on-time is not in-phase. Bandwidth is about more than electronics. FDEM has IP effects. Levelling EM data damages the EM data quality.
Sometimes a pencil and paper (and your brain) can do a better job of modeling than the best computer.
 

Biography:  Greg Hodges is a Senior Geophysicist at Sander Geophysics.  Since 1980 his career has included most types of mineral exploration geophysics, with a strong concentration on electromagnetic methods.   His career experience has been relatively equally divided between time-domain and frequency-domain EM, and between airborne and ground (including borehole). He's worked as a ground geophysical contractor, in junior and major mining companies, and (for the last 26 years) for airborne geophysical survey companies in R&D and applications development.  Along the way he's had the good fortune to do development work with some of the leading practical experts in both time- and frequency-domain EM.

Mark your calendar for KEGS future talks and events!

                          

KEGS extends condolences on the passing of Bob Middleton. 

KEGS is soliciting abstract submissions on the following topics:
Integrated Case Histories
Artificial Intelligence in Geophysics
New Developments (processing, techniques and equipment)
Environmental
Near Surface
Under cover
Borehole Geophysics

Abstract Submissions 
Short abstracts (400 words) are due Friday, December 3rd, 2021.  Please click here to submit your abstract, with "KEGS 2022 Symposium Abstract" in the subject line.

MTNet webinars on EM: 

Modular course on Exploration Geophysics

Every second December, The Mineral Exploration Research Centre at Laurentian University presents a modular course on Exploration Geophysics. This year the course will be held December 8-17 in the Executive Learning Centre, room FA-386 of the Fraser building on Laurentian’s Sudbury campus.  The course can be taken by graduate students for credit towards their degree programs, or by professionals, in which case it can be counted towards the hours required for continuing education by professional registration organizations like the PGO.  This year, professionals can sign up at a reduced rate if they participate in the lectures remotely and on-line. 

The course is intended for geologists and geophysicists and will cover all aspects of geophysical methods: theory, instrumentation, acquisition, processing, display and interpretation.  The methods covered and the case histories presented will be focused on mineral exploration. 

More details about the course and links to a brochure and a registration form can be found here

Women Geoscientists in Canada - Wednesday December 8.

KEGS Foundation Update

• Presentation of Scholarship Awards
• Bourse Québécoise : Inaugural Award to Adrien Dimech
• Seeking Donations
   

KEGS November talk

Please register for our November talk from link above.

Date:  Tuesday November 9th at 4:00 PM EST

Title:  Deep Learning as an alternative to downward continuation filters for structural interpretation

Speaker: Jean-Philippe Paiement, P.Geo., M.Sc. – Director, Global Consulting - Mira Geoscience


 

Abstract: Oftentimes when working with regional magnetic surveys from multiple sources, we encounter resolution continuity issues, which makes 2D interpretation more challenging. The loss in resolution of anomalies borders and lack of texture in the gridded data, can cause issues to the interpreter. This talk sets the basis of using currently available deep learning architecture to train a model for special resolution enhancement. 
Recent advancement in image processing and deep learning have led to the development of neural networks capable of increasing images resolution using and adversarial learning strategy (Wang, X et al., 2018). In this deep learning model, available high-resolution grids with their low-resolution counter parts are used to train an encoder-decoder network to reconstruct the high-resolution from their starting point. Once the network is sufficiently trained it is then possible to apply it to upscale low-resolution images without existing ground truth high resolution counter part. This approach uses Generative Adversarial Networks or GAN’s, a relatively new class of machine learning frameworks designed in 2014 (Goodfellow, I. et al). A generator network is used to construct images that are then passed through a discriminator network which tries to discriminate between real images and fake images produced by the generator. Given a training set, this technique learns to generate higher resolution data with the same statistics as the training set. 
Once the general model is trained on high-resolution/low-resolution pairs, it is possible to refine it to the area of interest and use it to upscale low resolution survey patches. This will help in refining anomaly edges and increase the accuracy of the structural interpretation conducted by the geologist. This approach is proposed as an alternative to the commonly used downward continuation filters used in the industry.     
 

Biography:  Jean-Philippe Paiement is the Director of Global Consulting at Mira Geoscience Ltd. He brings 15 years of mineral exploration experience to the table, including expertise in geostatistics applied to structural, geological, and geochemical modelling and interpretation; specializing in non-linear interpolation and simulation. Jean-Philippe has developed multiple workflow and novel approaches to reduce interpretational risks of geological data. Jean-Philippe has a wide range of experience in mineral resource estimation for precious metals, base metals and industrial minerals across diverse geological environments around the world. In 2016, Jean-Philippe has pioneered the application of Machine Learning to the mineral exploration industry in winning the Integra GoldRush challenge by application of machine learning to mineral deposit targeting. He is skilled in the application of machine learning to overcome geological and geophysical challenges; by combining geological knowledge and both supervised learning and deep learning. Before joining Mira Geoscience, he obtained an MSc from Laval University. Jean-Philippe is based in Quebec-City.
jeanphilippep@mirageoscience.com
Québec, Canada

Mark your calendar for KEGS future talks!
KEGS is pleased to announce a list of confirmed talks going forward:

December 7 –Greg Hodges Sanders geophysics. Title "More EM myths and Old-fashioned Methods"

Find out about more geo scientific events in GTA Geoscience calendar here

KEGS is pleased to announce that the PDAC 2022 Symposium is planned for Saturday March 5th 2022.

The format of the KEGS PDAC 2022 symposium will be announced within the next two weeks. Virtual participation will be available for those who cannot travel to the PDAC due to international travel restrictions. 

Theme
KEGS is soliciting abstract submissions on the following topics:
Integrated Case Histories
Artificial Intelligence in Geophysics
New Developments (processing, techniques and equipment)
Environmental
Near Surface
Under cover
Borehole Geophysics

Abstract Submissions 
Short abstracts (400 words) are due Friday, December 3rd, 2021. Please to submit your abstract to Farzaneh.Farahani@rmgeoscience.com, with "KEGS 2022 Symposium Abstract" in the subject line.

Minden Symposium 2021, Nov 8-11- Cutting Carbon in Canada

The theme of this year's Beatrice and Arthur Minden Symposium is Cutting Carbon in Canada (3C). Nov 8-11 for a multidisciplinary series of events on science, policy, social justice, and system change. The symposium will feature keynote talks, panel discussions, and interactive workshops addressing the challenge of getting to zero carbon emissions. More info here

MTNet webinars on EM: 

 EMinars: A series of webinars on EM Induction in the Earth in the broadest sense, from theory to acquisition to time series processing to analysis to modelling and inversion to interpretation

You can see the line-up on the MTNet EMinars web page here

University of Toronto Geophysics Seminar November 2nd, 4:10 -5 pm 

The Geophysics Seminar series for 2021-2022 is officially starting on Nov. 2nd with an exciting list of speakers (see below for more information).
 
The first talk will be given by Dr. Seogi Kang from Stanford University on Nov. 2nd
 
Title: Advancing Remote Sensing Techniques for Groundwater Science and Management

Date/Time: Nov, 2th 2021, 4-5 pm
Speaker: Seogi Kang 
Affiliations: Stanford University
https://profiles.stanford.edu/seogi-kang?tab=bio
 
Zoom Link: https://utoronto.zoom.us/j/86048413294
Meeting ID: 860 4841 3294
Passcode: geophysics

For more details on the geophysics seminars click here

Modular course on Exploration Geophysics

Every second December, The Mineral Exploration Research Centre at Laurentian University presents a modular course on Exploration Geophysics. This year the course will be held December 8-17 in the Executive Learning Centre, room FA-386 of the Fraser building on Laurentian’s Sudbury campus.  The course can be taken by graduate students for credit towards their degree programs, or by professionals, in which case it can be counted towards the hours required for continuing education by professional registration organizations like the PGO.  This year, professionals can sign up at a reduced rate if they participate in the lectures remotely and on-line. 

The course is intended for geologists and geophysicists and will cover all aspects of geophysical methods: theory, instrumentation, acquisition, processing, display and interpretation.  The methods covered and the case histories presented will be focused on mineral exploration. 

More details about the course and links to a brochure and a registration form can be found here

Looking for a job? Don't miss this job post!

Sander Geophysics (SGL) has permanent, full-time positions of Geophysicist/Data Analyst open. The position is most suitable for recently graduated or early career applicants. We would expect extensive international travel from the successful candidates. See the careers section of the SGL website, sgl.com,  for more information. If interested and qualified, please send a resume to careers@sgl.com. Be sure to include the job title in the subject line of the email.  We look forward to a gaggle of energetic, enthusiastic new employees to join our current staff of energetic, enthusiastic geophysicists!

Women Geoscientists in Canada - Fall Summit, Friday November 19, 2021: Why I do this!

Bringing together people and ideas for the love of geoscience Friday November 19, 2021
​1 pm to 430 pm Eastern, 10 am to 130 pm Pacific
Register here

QUEBEC SHOW – NOVEMBER 22-25, 2021 

The Quebec show 2021 will again be virtual, no in person KEGS breakfast. More info to be announced.

Nominations for a new KEGS executive member is open now! 

KEGS executives are excited to announce that they are looking for a new executive member to join the team. Please nominate yourself or if you know of anyone who is willing to volunteer some of their time to KEGS, please nominate them by sending an email to: robert.hearst@sgc.com.au 

Announcement Presentation of Inaugural Award Bourse des pionniers de la géophysique québécoise to Adrien Dimech, Ph.D. Candidate, UQAT KEGS-Québec 5-à-7 Event (KEGS-Quebec Virtual Cinq-à-Sept Get-Together and KEGS Foundation Scholarship Awards)

KEGS Foundation Update

• Announcement of inaugural award of Bourse québécoise: Version française here
• Presentation of Scholarship Awards
• Bourse Québécoise: 5 à 7 event
• Fundraising
• Seeking Corporate Donations