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  • 29 Oct 2020 10:00 PM | Kanita Khaled (Administrator)

    November 2020 - Bulletin

    Bulletin Topics:

    • KEGS November Talk - Airborne Induced Polarization (AIP) mapping of HTEM data and two cases from BC - Mt Milligan alkalic porphyry Au-Cu deposit and its AIP signatures and the past producer Au-Ag-Pb-Zn Dunwell mine in the Golden Triangle and its ground DCIP responses
    • Women Geoscientists in Canada Summit
    • CSEG Webinars
    • CSEG Distinguished Lecturer Presentation at UofT
    • KEGS Executive Nominations
    • Passing of Peter Hood
    • Mining Job Opportunities in Canada by Business Finland
    • KEGS Foundation Update


  • 5 Oct 2020 10:30 PM | Kanita Khaled (Administrator)

    October 2020 Bulletin

    Bulletin Topics:

    • KEGS October Toronto Talk - A Case Study on the Hat Project, British Columbia, with a Focus on Geophysics by Charlotte Thibaud
    • KEGS 2021 Symposium Announcements
    • Women Geoscientists in Canada Summit
    • APEGA Webinar
    • CSEG October Technical Webinar
    • Ore Deposit Talks
    • KEGS Executive 2021 - Welcoming Nominations
    • KEGS Foundation Update


  • 10 Sep 2020 11:00 PM | Kanita Khaled (Administrator)

    September 2020 Bulletin 

    Bulletin Topics:

    • KEGS Toronto Talk - Muon Tomography for Mineral Exploration, and other Applications in Underground Resources
    • SEG Annual Meeting
    • KEGS Foundation Update
    • CIM Webinar
    • KEGS Executive 2021 - Welcoming nominations now
  • 6 Jul 2020 6:51 PM | Kanita Khaled (Administrator)

    KEGS SUMMER 2020

    These past few weeks have been truly unlike anything we've experienced before. In light of our current circumstances, we are sad to announce that KEGS Toronto summer social events are postponed for the time being. We will be sure to keep you updated should things change. Please note that KEGS Ottawa webinars are also on pause for the summer.

    KEGS TORONTO JUNE TALK

    The upcoming June talk will be our final one before we break for the summer. We want to hear how everyone is doing during these challenging times so please join us online! We would also like to encourage submission for fall talks.

    Date:   2020-06-09 @ 4:30pm

    VenueWebinar

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    https://attendee.gotowebinar.com/register/7746708536911969295

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    Virtual Webinar. Register using the link below.

    Speaker Xiong Li, CGG

    Bio: Xiong Li received his BEng and MEng degrees from Chengdu Institute of Geology, and a PhD degree in 1991 from the Chinese Academy of Sciences. He worked at Freie Universität Berlin in Germany, École Polytechnique de Montréal in Canada, and BHP in Melbourne of Australia before joining Fugro in Houston of Texas, USA in 2001. He has been working for CGG since 2013 with an acquisition of part of Fugro. He has been Chief Geophysicist of CGG Multi-Physics (and its predecessors in Houston) since 2005. He was a member of the team that developed the FALCON airborne gravity gradiometer technology. He and Yaoguo Li helped SEG and the Chinese Geophysical Society organize three GEM Workshops: in Beijing in 2011, in Chengdu in 2015, and in Xi’an in 2019. He has been an associate editor, for gravity and magnetic exploration methods, of GEOPHYSICS since 2005.

    TitleHigh-Resolution Magnetic Data for an Improved Accuracy of Wellbore Positioning

    Directional drilling maximizes the extraction of oil and gas while minimizing the cost. The Measurement While Drilling describes directional surveying and drilling-related measurements. A cost-effective MWD is to measure the distance and two angles: the dip measured by a triaxial accelerometer and the azimuth by a triaxial magnetometer. Magnetic survey relies on the principle of measuring the direction of the wellbore relative to the direction of the local geomagnetic field. Its accuracy is thus limited by the accuracy with which the Earth’s local magnetic field is known at the drilling site and time.

    The MWD engineer uses the local gravity and magnetic fields to correct the measurements received from the downhole sensor for certain errors, including magnetic interference due to the drill string and local geology; then calculates the tool orientation from the corrected measurement; and finally advises the drilling engineer to adjust the drilling towards the desired direction. The local fields may be also used to perform a set of quality checks on the measured data.

    We have developed a technique named MagCUBETM that converts surface-observed scalar total magnetic intensity anomalies into a subsurface vector crustal magnetic field distribution. We also estimate the uncertainties in the main magnetic field model, the disturbance field, and the local crustal field model. In particular, we build the crustal field model by using high-resolution magnetic data. A combination of these efforts results in an improved accuracy of wellbore positioning.

    ORE DEPOSITS HUB

    Ore Deposit Hub started in March 2020 to fill the void left by conferences and meetings cancelled due to COVID-19. A schedule of Ore Deposits Hubs hosted talks can be found here .


  • 22 Jun 2020 6:53 PM | Kanita Khaled (Administrator)

    June 2020 Bulletin

    PGO 2020 VIRTUAL SYMPOSIUM

    The PGO Symposium will take place virtually over June 30, July 7, July 14 and July 21, 2020.

    This online learning event has been designed by professional geoscientists for professional geoscientists. It will present must-have emerging information and highlight key tools relevant across all geoscience subdisciplines and specializations. This symposium covers a broad array of themes that will also be of interest to the broader professional and geotechnical community including regulators, government staff, professional and technical societies, insurers, legal practitioners, proponents of geoscience-related projects and the general public.

    For professional geoscientists in Ontario and across Canada, this is an excellent and cost-effective way of accumulating continuing professional development (CPD) hours for 2020.

    To register or read more about the symposium, visit https://www.pgo.ca/events/2020-annual-symposium

    GEOSCIENCE SUMMER TALKS

    TGDG and Ore Deposits Hub are continuing to host interesting and informative virtual talks through the summer.

    Stay up to date by visiting their websites to check for upcoming events and talks.

    TGDG - https://www.tgdg.net/GTAevents

    Ore Deposits Hub –https://oredepositshub.com/calendar/

    PASSING OF DR. TONY NALDRETT

    We regret to inform you that Dr. Tony Naldrett has passed away on June 21, 2020.

    If you wish to read about Tony's life in his own words, please see attached document.

    Ed Spooner has also written about Tony here.

    Download: Tony Naldrett in his own words 2020



  • 11 May 2020 6:55 PM | Kanita Khaled (Administrator)

    May 2020 Bulletin

    KEGS TORONTO TALK, MAY

    Register online to join the KEGS Toronto May talk!

    Date:   2020-05-12 @ 4:30pm

    VenueWebinar

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    https://attendee.gotowebinar.com/register/2771242498534384655
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    Password: 621480
    +17789072071,,95149535406# Canada
    +14388097799,,95149535406# Canada
    +1 778 907 2071 Canada
    +1 438 809 7799 Canada
    +1 587 328 1099 Canada
    +1 647 374 4685 Canada
    +1 647 558 0588 Canada
    855 703 8985 CanadaToll-free
    Find your local number:https://laurentian.zoom.us/u/arHSDrcxq

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    Register here to join the webinar presentation:

    Speaker David Schieck, MSc., P.Geoph (AB) P.Geo(ON)

    Bio: David started his career in high school with a summer job as a “jug-hound” in S. Alberta. He continued his interests in seismology obtaining a BSc. at the University of Western Ontario then worked as a 3D seismic processor/programmer for several years. Early 90’s he obtained an MSc with the newly established CREWES project at University of Calgary. He worked on analyzing Ground roll dispersion and some of the early ideas of ground roll removal from P-Sv processing. After working for a mining engineering firm acquiring high resolution seismic in the jungles of Suriname to identify high liquefaction clays, he started his own engineering seismic firm Geophysical Applications (GAPS) in Guelph, Ontario. GAPS acquired high resolution seismic for landfills, exploration for groundwater wells in the SW Ontario, underground storage facilities in Sarnia and Cape Breton, and Kaolin clay delineation in Nova Scotia as well as acquiring large scale O&G exploration projects in NE USA. GAPS was absorbed by a seismic exploration company in western Canada and, for a brief stint, David was hired as the operations geophysicist at Husky Energy where he championed slip-sweep acquisition and began to move groups there into shear wave processing. Recently David took advantage of the downturn in Oil exploration purchased two Envirovibes, built a 3C landstreamer from unused ARAM MkII equipment, then partnered up with Echo Seismic to start a new environmental and engineering division that is promoting shear-shear high resolution seismic. David has a unique combination of data processing, shallow seismic and shear wave seismic knowledge.

    TitleShear landstreamer profiling for dam and levee investigation: Single pass MASW, P- & SH-wave reflection technology

    Recent near surface seismic reflection developments using land-streamer have been commercialized in the Western Canadian by re-purposing former exploration seismic equipment. A 16,000 lb IVI Envirovibe is retrofitted with a 6,000 lb shear vibrator pack that can be rotated to transverse or inline orientation. An exploration ‘ARAM lite’ recording system has been mounted in the cab, 72X10Hz 3 component geophones are mounted on metal sleds spaced 1.5 m apart towed along by a kevlar belt along with vibe electronics and real-time GPS positioning. The high multiplicity and relatively large energy source enable non-intrusive high resolution, quantitative investigations in the range of 3 – 200m depths, not possible with any other geophysical methods.

    Shear wave velocities (Vs), within consolidated rocks, are typically ½ the corresponding compressional or P-wave velocities (Vp) means the Vp/Vs ratios~2). However, within unconsolidated soil materials the ratio of Vp/Vs is often within the range of 6-12. This means vertical resolution of shear wave data within the near surface material, even if recovered frequencies are ½ that of P-wave, are 3 to 5 times higher when time sections are converted to depth. Vp is affected by fluids whereas Vs is not, refraction is dependent on increasing velocities whereas reflection is not. The towed SH landstreamer is ideally suited to earth dam applications and other near surface problems. A combination of seismic methodologies including refraction, P-wave and SH-wave reflection and MASW can be achieved in a single pass. A quick discussion of the theory of these methods, examples of real data and case studies will be presented.


    KEGS OTTAWA APRIL MEETING

    Date:   2020-04-28 @ 4:30pm

    Venuesee below for link

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    Richard Smith gave me a kick in the behind this week to facilitate our April meeting with Tom's presentation. Richard will use his Laurentian account to host a Zoom based presentation. We will meet virtually Tuesday April 28 at our usual time, 4:30, using Richard's Zoom account.

    https://laurentian.zoom.us/j/95149535406?pwd=VytSZ2x6K2d2alFqTHovL2tsUTJ0UT09

    Meeting ID: 951 4953 5406

    One tap mobile

    Dial by your location

    Please be sure to mute your microphone when you sign in. We will be accepting written questions throughout the presentation using the chat window.

    I hope to "see" a good turn-out on Tuesday!

    Speaker Tomas Naprstek, National Research Council Canada and Laurentian University (Ph.D. Candidate)

    Bio: Tomas Naprstek completed his B.Sc. in Physics at the University of Waterloo in 2012 and his Geophysics M.Sc. at Laurentian University in 2014. He is in the process of finalizing his Geophysics Ph.D. at Laurentian University which focuses on the interpolation and interpretation of lineaments in aeromagnetic data. Since 2016, he has worked at the National Research Council of Canada. His research there primarily focuses on developing new processing and analysis techniques for remote sensing applications, such as the geolocation of wildfire data and aeromagnetic compensation for unmanned platforms.

    TitleMachine Learning for the Interpolation and Interpretation of Aeromagnetic Data

    Due to the continually lowering barrier for entry of usage, machine learning methods are being applied increasingly in a wide array of fields, and offer a new approach to solving established problems. In this presentation, the potential use of machine learning for aeromagnetic interpolation and interpretation is explored. We investigate interpolation using support vector machines and random forests, and show how their user-driven approach to machine learning enables a small improvement over standard interpolation methods for aeromagnetic data. Following this, convolution neural networks are applied to the interpretation of lineaments in an effort to estimate their strike and depth from aeromagnetic grids. This deep-learning approach requires extensive synthetic data for training; however we show that the method is a powerful tool, and has the potential to quickly and effectively estimate multiple source parameters in entire aeromagnetic grids.

    Upcoming KEGS Ottawa Presentations

    That's it, that's all for now! I hope we will be meeting in person in September - or maybe even for a KEGS Ottawa BBQ later this summer!


  • 5 Apr 2020 3:00 PM | Kanita Khaled (Administrator)

    April Bulletin

    Bulletin Topics:

    • KEGS Toronto Talk: Downhole Physical Rock Properties and Televiewer Measurements - Borehole Data with a Purpose
    • SEG Virtual Lecture
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