Experimental Deformation of Textured Amphibolites in the Semi‐Brittle Regime: Microstructural Signatures of Dislocation‐Mediated Deformation Experimentally deformed hornblende displays a transition to dislocation-mediated deformation approaching 800°C at a pressure of 1 GPa Dislocation-mediated deformation is accompanied by a transiti...

see here:
agupubs.onlinelibrary.wiley.com/doi/full/10....

Carried out with Sarah Incel (GFZ Helmholtz Centre for Geosciences) and Joerg Renner (Ruhr-Universität Bochum)!

The nice thing about this paper is that it demonstrates experimentally that these microstructural signatures can be used to identify deformation mechanisms in naturally deformed amphibolites.

The study shows that higher temperatures weaken hornblende-rich rocks, reduce fracturing, and reveal a coupled evolution of brittle fractures and plasticity (via stress-induced crystal defects).

🚨 New Paper Alert 🚨

I’m excited to share the first paper from Bhupesh Meher's PhD work (also my first paper as a PhD advisor!).

Deformation experiments on hornblende-rich samples at the brittle-plastic transition (see more in comments...)

Thin section of deformed contact metamorphosed marble with clinopyroxene blasts surrounded by twinned and deformed calcite. Width: 3 mm. Contact aureole of the Monte Capanne pluton, Elba

Textbook: 'contact metamorphism is static'

The thin section:

In my experience, I have never seen fully static contact metamorphism, but that's maybe because Tuscan plutons aureoles are very deformed. Anyway, I am pretty tired of reading this sentence in textbooks 🙃

⚒️🧪
#thinsectionthursday

Mineral & Rock Physics (AGU 2024)
Now you can propose new sessions for this year's AGU 2024 @ Washington D.C.! Deadline is April 24th - so now's the time!