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Georg Zellmer

@gzellmer

Chair in Petrology, University of Bonn, and Executive Editor, Journal of Petrology. Views are my own.

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22.01.2025
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Latest posts by Georg Zellmer @gzellmer

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Congrats to Rae Sanches for her first paper of her PhD project:
doi.org/10.1016/j.jv...

27.02.2026 08:25 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Geological Society announces recipients of 2026 Medals, Awards and Funds | The Geological Society of London

Honoured to be this year's Coke Medallist of the Geological Society of London for my contributions to science and my service to the geosciences community. Thanking my nominator and supporters for their hard work to get me considered!
www.geolsoc.org.uk/news/geologi...

27.02.2026 00:11 πŸ‘ 5 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Subducted sediments and deep crustal processes drive volcanism in the Taupo Volcanic Zone, New Zealand: an alternative interpretation Abstract. The Taupo Volcanic Zone (TVZ) is a young volcanic arc producing large volumes of silicic magmas with crustal signatures that are traditionally at

Congratulations to Carlos for an excellent new JPet Letter script on magma genesis in the TVZ, New Zealand, just published:
academic.oup.com/petrology/ad...

17.02.2026 03:04 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Matrix effects on secondary ion emissions for H and OH from natural spinel-structured oxides: Implications for H2O quantification by secondary ion mass spectrometry | American Mineralogist | GeoScienc...

Technical paper just out after many years of work:
pubs.geoscienceworld.org/msa/ammin/ar...

17.02.2026 03:03 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Given the roughly linear trend in global warming since 1970, what's the chance that we stay below 2 degrees warming at 2050? Pretty slim, it seems to me.

29.08.2025 15:07 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

"Der Grund dafΓΌr ist die VerspΓ€tung eines vorausfahrenden Zuges" - one might ask why the prior train was delayed. So the better explanation would be that the reason is the utter incompetence of Deutsche Bahn.

01.08.2025 11:15 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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It seems we may have reached a new normal here, though it is too early to tell. Almost 1 degree above the pre-2000 average.

01.08.2025 11:12 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Crystal Fragmentation Inducing Euhedral Crystal Habits in Volcanic Rocks: Fracture Histories of Crystals from Various Tectonomagmatic Settings and Implications for Plumbing System Processes | The Cana...

doi.org/10.3749/2400... - just out for you to enjoy!

07.05.2025 17:24 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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First Global Comparison of Glacier Mass Change: They’re All Melting, and Fast - Eos By systematically assessing data gathered by different methods, researchers refined estimates of global glacier melt and its contribution to sea level rise.

First Global Comparison of Glacier Mass Change: They’re All Melting, and Fast eos.org/articles/fir...

18.04.2025 10:51 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Would Adding the Anthropocene to the Geologic Time Scale Matter? The Earth System clearly no longer operates in a β€˜Holocene mode’ mainly due to fossil fuel-driven output during the mid-20th C Great Acceleration The altered state of the Earth System, without ne...

agupubs.onlinelibrary.wiley.com/doi/10.1029/...

28.03.2025 10:28 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Observation-based early-warning signals for a collapse of the Atlantic Meridional Overturning Circulation - Nature Climate Change The Atlantic Meridional Overturning Circulation (AMOC) is currently strong, but transition to its weak mode could see significant changes in the climate system. This work presents an observation-based...

"he presented findings suggest that this [AMOC] decline may be associated with an almost complete loss of stability of the AMOC over the course of the last century, and that the AMOC could be close to a critical transition to its weak circulation mode."
www.nature.com/articles/s41...

03.02.2025 01:43 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

iopscience.iop.org/article/10.1...
Troubling outlook...

01.02.2025 01:11 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Editorial In March 2024, Journal of Petrology transitioned to the requirement of prior upload of any new underlying data and new software code to recognized domain r

academic.oup.com/petrology/ar...

31.01.2025 20:28 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Happy Lunar New Year to my friends and colleagues in East Asia! May the year be prosperous, bring happiness, and fulfill your wishes!

29.01.2025 20:21 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

One more reason to publish with OUP's Journal of Petrology! OUP is a not-for-profit publisher.

28.01.2025 02:48 πŸ‘ 1 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0
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Postdoc publications and citations link to academic retention and faculty success | PNAS Postdoctoral training is a career stage often described as a demanding and anxiety-laden time when many promising PhDs see their academic dreams sl...

www.pnas.org/doi/10.1073/...

23.01.2025 04:27 πŸ‘ 4 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

Still in New Zealand, but transitioning to Bonn in March. Move preparations in are going well, hope to get back to do Science again soon. See some of you at IAVCEI in Geneva and some of you at Goldschmidt in Prague, I hope.

22.01.2025 23:06 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0