Sonja Geilert

PhD position on Constraining Hadean ocean geochemistry Ever wondered what the Hadean ocean looked like? Come work with us on silicate weathering experiments simulating the geochemistry of the first ocean.

8days to go:

Open PhD position at #Utrecht University:
Interested in #silicate weathering, geochemical laboratory #experiments and #EarlyEarth?

And be part of a consortium www.originscenter.nl/prelife/) with @ingeloes.bsky.social and many more.

Then consider to apply:

www.uu.nl/en/organisat...

Ever wondered what the Hadean ocean looked like? 🌊🌊🌊

Come work with us on 🧪silicate weathering experiments🧪 simulating the geochemistry of the first ocean and be part of a large consortium investigating the origin of life #prelife.
@ingeloes.bsky.social

Apply here: www.uu.nl/en/organisat...

Intrigued by these kind of experiments? 🧪 🌊 🧪

Then have a look at this PhD vacancy: www.uu.nl/en/organisat...

🌏 !!!5 days to apply!!! 🌍

#CDR #climatechange @utrechtuniversity.bsky.social @cdrmare.bsky.social

PhD Position on Coastal Environments as mCDR Sites to Mitigate Climate Change Want to bring climate change mitigation actions forward? Come work on enhanced silicate weathering and ocean alkalinisation as marine CO2 removal techniques.

JOB OPPORTUNITY (PhD position):

Want to bring climate change mitigation actions forward? Then join us and work on enhanced silicate weathering and ocean alkalinization as marine CO2-removal technique.

🧪🌏 🌊 🌊 🌊 🌏 🧪

www.uu.nl/en/organisat...

Happy to announce that 🥳 Sasha Turchyn 🥳 will give a keynote talk in our Goldschmidt session 12f!

Come and join us!

Can't wait to chat with you about clays, authigenesis, silicates and marine element cycles ☺️

⛰️🌏🌊

@aprilabbott.bsky.social

conf.goldschmidt.info/goldschmidt/...

Great work @mfgeochemistry.bsky.social ! So happy to see it published!

👇👇👇

Thinking of coming to the #Goldschmidt2025 conference? And working on marine #silicate weathering and reverse weathering?

Then consider submitting an abstract to our session 12f!

🌊🌊🌊🌊🌊🌊⛰️⛰️⛰️⛰️🌊🌊🌊🌊🌊🌊

@aprilabbott.bsky.social @krhendry.bsky.social

conf.goldschmidt.info/goldschmidt/...

👇🧪👇

Just out:

Our Goldschmidt 2025 session on marine silicate alteration and impact on marine element cycles was just accepted!

If you have exciting new data on all (!!!) involved elements, consider submitting an abstract.

@aprilabbott.bsky.social

👇👇👇
conf.goldschmidt.info/goldschmidt/...

Will remember this for next year😂🧪

Hi, your name appeared also under the Ocean/Atmosphere keywords. Only physics? I'm in ocean geochemistry, but also working on marine Carbon Dioxide Removal, if that counts as (geo)engineering 😉 If yes, happy to be added to the list

scholar.google.de/citations?us...

Hi, would be great, if you could add me to the list!
Thanks!

scholar.google.de/citations?us...

Iron redox shuttling and uptake by silicate minerals on the Namibian mud belt Anoxic marine sediments represent an important source of bioavailable iron (Fe) to the ocean. The highest sedimentary Fe fluxes are observed in open-m…

New paper out with Paul Vosteen and Florian Scholz (amongst others) on Fe redox shuttling and uptake by #silicate minerals on the Namibian coast:

www.sciencedirect.com/science/arti...

@utrechtuniversity.bsky.social @geomarkiel.bsky.social

Wonder why this pic shows up when inserting the link🤷

Exactly. Global fluxes are not quantified (yet) or based on a very small data set.

😏

Coastal El Niño triggers rapid marine silicate alteration on the seafloor - Nature Communications This study identifies the rapidness of marine mineral reactions, directly after an extreme rainfall event. The reactions have the potential to affect marine cation and CO2 cycling, impacting element t...

Without wanting to brag, but I showed the direct correlation between 'natural' enhanced mineral addition (flood event), dissolution and clay precipitation in this 'natural' analogue at the Peruvian coast:

www.nature.com/articles/s41...

Yes, that's exactly my point and what I'm trying to stress (warn...) in all my OAE talks. RW occurs naturally in marine sediments and can be triggered by mineral dissolution.

Next to Si, aluminum availability, pH, reactive surfaces are crucial.

So happy to announce that our #PRELIFE consortium was awarded🥳

In one of 16 projects on the emergence of life, I will investigate the onset of silicate weathering and its coupling to ocean chemistry.

For the silica lovers: special emphasis on reverse weathering,😉

@utrechtuniversity.bsky.social