iiinova — where your digital self keeps evolving

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 · 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 ⚒️🧪

$SEM-CL map of fractured plagioclase, quartz, K-feldspar, and mafic phases (black) next to a ductile shear zone (at bottom and out of sight)$

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Stephen Michalchuk @stephenmichalchuk.com · 12/03/2025

💥 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 · 04/02/2025

🚨 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 · 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 Renard

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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 pseudotachylyte

Plane polarized light micrograph of a pseudotachylyte

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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

⚒️🪨 #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 · 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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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, Norway

Cross 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 · 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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Stephen Michalchuk @stephenmichalchuk.com · 16/11/2024

It might not be #thinsectionthursday, but my Saturday morning coffee has inspired me to post some microstructures from pseudotachylyte fault rocks from Lofoten, Norway.

Coronas of garnet around foxy brown biotite and coronas of garnet & OPx around olivine in the damage zone of a pseudotachylyte vein (black very fine grained vein with suspended clasts at the bottom of the view)

Quenching microstructures in a pseudotachylyte fault - microlites of plagioclase and cauliflower garnet)

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Stephen Michalchuk @stephenmichalchuk.com · 14/04/2024

Heading off to #Vienna for #egu24. Many of my fellow Njord ECS members are giving presentations! Check them out and see you there! @hugolantman.bsky.social @sheared-sash.bsky.social @eurogeosciences.bsky.social #schnitzelfest

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