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Stephen Michalchuk

@stephenmichalchuk.com
404 followers 97 following 48 posts

🇨🇦 Post Doctoral Research Geologist #pseudotachylyte #mylonite #shearzone #garnet #plagioclase #geothermal www.stephenmichalchuk.com IG: @powphotog

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Stephen Michalchuk @stephenmichalchuk.com · 10/07/2026
Multiple copies… I wish citations piled up like this! 27 emails and counting…
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Reposted by Stephen Michalchuk
Nature @nature.com · 19/06/2025
Most pixels in cameras detect only red, green or blue light. A sensor made from perovskite materials absorbs all three, improving image brightness and resolution go.nature.com/3T1oKcd
go.nature.com
Light detectors made from perovskite crystals see in full colour
Most pixels in cameras detect only red, green or blue light. A sensor made from perovskite materials absorbs all three, improving image brightness and resolution.
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Reposted by Stephen Michalchuk
EGU TS @ts.egu.eu · 13/06/2025
Jobs on Friday! ⚠️ 2 post-doctoral researcher positions (2 years) to investigate deformation processes that occur before and during earthquakes. Where: the Njord Centre, a leading research centre in physics and geosciences at the University of Oslo. www.jobbnorge.no/en/available... #geology
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Reposted by Stephen Michalchuk
Nature Portfolio @natureportfolio.nature.com · 31/05/2025
Canadian academics are some of the Americas’ top research collaborators and receive funding from US agencies. As a result, they have not been spared from the funding cuts and job losses that are plaguing their US counterparts. #Academicsky 🧪
go.nature.com
‘A funeral for our careers’: Trump’s science cuts spill onto Canadian turf
Researchers in Canada prepare for turbulence in the wake of US funding changes — but there’s a silver lining.
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Stephen Michalchuk @stephenmichalchuk.com · 03/05/2025
@sheared-sash.bsky.social
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Stephen Michalchuk @stephenmichalchuk.com · 03/05/2025
What a week @egu.eu. Lots of interesting presentations and fantastic sunny hot weather in Vienna! Sadly, not enough schnitzels! Oh well, maybe next year. @sheared-sash.bsky.social
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Stephen Michalchuk @stephenmichalchuk.com · 29/04/2025
The return of the pre-EGU fieldtrip through the Austrian Bohemian Massif was a fantastic way to kickoff the conference week. Fantastic weather and fantastic organization made it very enjoyable! Thanks Bernhard, Anna, @sheared-sash.bsky.social and Chris. #egu25 @egu.eu @ts.egu.eu 🪨 🧪⚒️ #geology
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Stephen Michalchuk @stephenmichalchuk.com · 29/04/2025
Silvio and Matt Cohen
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Stephen Michalchuk @stephenmichalchuk.com · 24/04/2025
It’s been a hot minute since my last #thinsectionthursday but here’s some things I’m working on these days… anyone else having issues with how2plot in MTEX 6.0? I’ve seen some solutions online.. think they’re working but it’s just so random how orientations get flipped without explicit scripting ⚒️🧪
EBSD orientation map of plagioclaseSEM-CL map of fractured plagioclase, quartz, K-feldspar, and mafic phases (black) next to a ductile shear zone (at bottom and out of sight)
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Stephen Michalchuk @stephenmichalchuk.com · 12/03/2025
Takk Hugo!
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Stephen Michalchuk @stephenmichalchuk.com · 12/03/2025
Thanks! Couldn’t have done 2/3 without you… some might even say 3/3 without you… but we’ll leave that for another debate hahah
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Stephen Michalchuk @stephenmichalchuk.com · 12/03/2025
💥 hot off the press and 4 years in the making! My PhD thesis in all its glory! 2 published papers, 1 nearly ready for submission, and an exciting project in the making, all find a home in the pages within. Super proud of my work at Njord w/ Luca Menegon, Kristina Dunkel, & @sheared-sash.bsky.social
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Stephen Michalchuk @stephenmichalchuk.com · 04/03/2025
It’s cause of the eggs pricing… #openingthecanofworms
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Stephen Michalchuk @stephenmichalchuk.com · 04/03/2025
So you don’t shake hands with the rector/president in some fancy library and receive the degree all rolled up in a few weeks time?
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Reposted by Stephen Michalchuk
European Geosciences Union (EGU) @egu.eu · 03/03/2025
Hello Bluesky! EGU is pleased to be able to activate our account here, and share all the exciting news about the upcoming General Assembly: #EGU25, our #OpenAccess publications and more! Several of our Divisions will be making the move over from Twitter/X too, so keep an eye out for your favourites!
Blue background with yellow EGU logo and text that reads "European Geosciences Union".
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Stephen Michalchuk @stephenmichalchuk.com · 23/02/2025
Great GUI. I’ll have to dig around with the plotting options. Lots of settings to sort out on how I want to present my data
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Stephen Michalchuk @stephenmichalchuk.com · 23/02/2025
media.tenor.com
a group of men standing next to each other with the words she 's terrible partial to the periwinkle blue boys
ALT: a group of men standing next to each other with the words she 's terrible partial to the periwinkle blue boys
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Stephen Michalchuk @stephenmichalchuk.com · 20/02/2025
I saw that but it’s now outdated by 6 years
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Stephen Michalchuk @stephenmichalchuk.com · 20/02/2025
Searches come back with R scripts or suggesting to use Web of Science author search, which are all valid of course. This website I came across was quick and easy
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Stephen Michalchuk @stephenmichalchuk.com · 20/02/2025
Hey everyone, Does anyone have a link to a website where you can search for conflict of interests among research collaborators? A few months ago (~Nov 2024), someone shared a link but I haven’t been able to find it or something similar with a google search. 🧪 ⚒️
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Stephen Michalchuk @stephenmichalchuk.com · 04/02/2025
😃 thanks Hugo!
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Stephen Michalchuk @stephenmichalchuk.com · 04/02/2025
(3) Repeated fragmentation and comminution in addition to fluid at the grain boundaries are required to facilitate viscous deformation
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Stephen Michalchuk @stephenmichalchuk.com · 04/02/2025
We find that (1) Plagioclase in the damage zone of a lower-crustal pseudotachylyte deformed via pulverization-style fragmentation (2) Liberated H2O as a result of the earthquake remained in grain boundary regions and facilitated neoblast growth and healing of fractures
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Stephen Michalchuk @stephenmichalchuk.com · 04/02/2025
🚨 Hot off the press 🪨 ⚒️ Where do you come from, where do you go 🎶 fluids that is… after an earthquake in the dry lower crust? We look into this and more using SEM-CL, EBSD, EMPA, STEM, and FTIR! Hit the link below 👇 agupubs.onlinelibrary.wiley.com/doi/full/10....
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Stephen Michalchuk @stephenmichalchuk.com · 18/01/2025
The poll was only open for all of… less than a week. How many answered? Is it even representative? Article date for the poll is January 14th and today is the 18th
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Reposted by Stephen Michalchuk
Vicky Veritas @vickyveritas.bsky.social · 18/12/2024
Our deep-time emissary, Marcia Bjornerud, takes us on a metamorphic journey. ⚒️🧪 geology GIS
aeon.co
Metamorphic rocks go on deep journeys we never can | Aeon Essays
Metamorphic rocks are our emissaries from the deep, travelling to alien realms and revealing the restless nature of Earth
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Stephen Michalchuk @stephenmichalchuk.com · 11/12/2024
Charles personally reads each research article generated by his peoples haha
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Stephen Michalchuk @stephenmichalchuk.com · 06/12/2024
The Njord Julebord at Det Norske Videnskaps Akademi An evening of some science and a lot of ribbe🎄 ⚒️🧪🪨🔬
The boogie auditorium with François RenardMy yearly Nansen photo!
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Stephen Michalchuk @stephenmichalchuk.com · 05/12/2024
🪨⚒️ #thinsectionthursday of a recrystallized quenched frictional melt (pseudotachylyte) from Lofoten, Norway. Plagioclase survivor clast retains deformation twins, reaction between garnet-amphibole. Garnet cores are full of inclusions from rapid quenching growth, then slow growth to form facet GB🧪 🔬
Crossed polarized light micrograph of a pseudotachylytePlane polarized light micrograph of a pseudotachylyte
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Stephen Michalchuk @stephenmichalchuk.com · 03/12/2024
Congrats 🥳 🎉
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Reposted by Stephen Michalchuk
Sascha Zertani @sheared-sash.bsky.social · 29/11/2024
This is a map showing the orientation of diopside in a deformed symplectite. This used to be an omphacite, which tells us that the rock used to be at very high pressure (great depth). ⚒️🧪 If you want to read more about how such symplectites nucleate and deform: link.springer.com/article/10.1...
Orientation map (IPFZ) of diopside that formed from the breakdown of omphacite, a high pressure mineral.
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Stephen Michalchuk @stephenmichalchuk.com · 29/11/2024
Sure is magical!
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Stephen Michalchuk @stephenmichalchuk.com · 29/11/2024
I’ll take Lipari, Oslo, or Vik anyday over the pukey 🤮 Batlow and Jet! Hahah
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Stephen Michalchuk @stephenmichalchuk.com · 29/11/2024
One of the many perks living and working at the University of Oslo. Winter mornings are just perfect up here. Sunrise at 8:40am this morning. Could use a little bit of snow in the city❄️ 🔬⚒️🪨🧪
Purple and pink sunrise over the University of Oslo
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Stephen Michalchuk @stephenmichalchuk.com · 28/11/2024
So that’s my answer 🤿
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Stephen Michalchuk @stephenmichalchuk.com · 28/11/2024
But where’s the thin section???? Hahah
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Stephen Michalchuk @stephenmichalchuk.com · 28/11/2024
⚒️🪨 #thinsectionthursday on a quartz mylonite from… my iPhone camera roll 😂. Could be from the teaching collection or from Australia 🤷🏻‍♂️ I particularly like the “Hawaiian flower” partially recrystallized grain in the lower ribbon. Aloha! 🧪🔬
Thin section of a quartz mylonite cross polarized light with lambda plate in. Grain size is variable, with some super fine grained material mixed with micas, and coarse grained ribbons that are annealed and recrystallized.
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Stephen Michalchuk @stephenmichalchuk.com · 28/11/2024
This is the highest “mountain” in the Netherlands 🇳🇱 😉
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Stephen Michalchuk @stephenmichalchuk.com · 24/11/2024
Same here. Can clearly see I’ve cracked it open a bunch!
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Reposted by Stephen Michalchuk
Sascha Zertani @sheared-sash.bsky.social · 22/11/2024
Brittle? Ductile? Brittle-ductile? If you are interested in why rocks deform the way they do, consider submitting an abstract to our session at #EGU25! The deadline to apply for travel support is on December 2nd! meetingorganizer.copernicus.org/EGU25/sessio...
Info grafic advertising session TS1.3 at EGU25. Title of the session is: Brittle and ductile deformation of Earth's lithosphere: Mechanisms governing deformation style. Invited speaker: Marie Baïsset (ENS Paris)
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Stephen Michalchuk @stephenmichalchuk.com · 22/11/2024
Hahah I’ve been on Instagram for far too long to not know how to take a photo of my food, coffee, book, outcrop…. 🙄
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Stephen Michalchuk @stephenmichalchuk.com · 22/11/2024
💸💸💸
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Stephen Michalchuk @stephenmichalchuk.com · 22/11/2024
🪨⚒️ Just received my advanced copy of Haakon’s and Christian’s latest textbook, Plate Tectonics. Will be a nice complementary next to these other beauties #earth-sciences 🔬🧪 #geology
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Reposted by Stephen Michalchuk
Konrad Kording @kordinglab.bsky.social · 11/11/2024
NSF makes you say who you got conflicts (coauthored) with. We (really just Jordan Matelsky) just built you a tool for that. Literally one click: bib.experiments.kordinglab.com/nsf-coa
bib.experiments.kordinglab.com
NSF COA | Jordan Matelsky
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Stephen Michalchuk @stephenmichalchuk.com · 21/11/2024
⚒️🪨 #thinsectionthursday of a corona of garnet enveloping (a weird) biotite within an anorthosite from Lofoten, Norway. This sample was drilled in what we thought was relatively undeformed rock, but plagioclase loves to form tapering deformation twins… so how deformed is undeformed? 🧐 #earth-sciences
Plane polarized light microscopy image of a corona of garnet enveloping (a weird) biotite within an anorthosite from Lofoten, NorwayCross polarized light microscopy image of a corona of garnet enveloping (a weird) biotite within an anorthosite from Lofoten, Norway
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Stephen Michalchuk @stephenmichalchuk.com · 21/11/2024
Hi Samuele, can I be added as well? Thanks!
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Reposted by Stephen Michalchuk
Sascha Zertani @sheared-sash.bsky.social · 19/11/2024
Are you interested in how deformation and metamorphism interact? Consider submitting an abstract to our session at #EGU25 ⚒️🧪 meetingorganizer.copernicus.org/EGU25/sessio... Deadline to apply for travel support is om the 2nd of december!
Banner advertising session GMPV3.2 at EGU25 general assembly titled: How deformation and metamorphism interact: insights into thermal-hydrological-mechanical-chemical feedbacks in nature and experiments

The conference will be in Vienna, Austria and online between 27 April and 2 May 2025.
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Stephen Michalchuk @stephenmichalchuk.com · 17/11/2024
Thanks Leonardo! Hope you’re doing well
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Stephen Michalchuk @stephenmichalchuk.com · 17/11/2024
⚒️ #earth-science
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Stephen Michalchuk @stephenmichalchuk.com · 17/11/2024
I woke up to a bunch of new followers, so I should share some things that we do here at the Njord Centre, University of Oslo. Here is my JGR: Solid Earth paper on porosity in lower crustal faults and ductile shear zones using microCT, EBSD, SEM-CL. agupubs.onlinelibrary.wiley.com/doi/abs/10.1...
Top left is a microtomography volume of a pseudotachylyte (PST) and the adjacent damage zone. Porosity is concentrated in the PST, while the damage zone is efficiently healed. Highwr amounts of porosity is around garnet due to densification during garnet recrystallization growth.
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