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MarcA Millet

@marcamillet

Geologist turned lab rat.

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24.09.2023
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Latest posts by MarcA Millet @marcamillet

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Funding opportunities The Geochemistry Group offers a number of funding opportunities for Ph.D students, early career researchers (ECRs), and technical staff to attend meetings. We can also help support scientific meeti…

Technical staff are often overlooked and underrepresented at Scientific meetings...

We hope to address this with our new Technical Staff Meeting Attendance Bursary!

Please visit our website for full details and to apply: geochemistry.group/funding-oppo...

05.02.2026 10:20 πŸ‘ 7 πŸ” 8 πŸ’¬ 0 πŸ“Œ 0

Great news. Congrats to the team!

04.02.2026 13:58 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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A reminder to register and submit your abstracts for the upcoming GGRiP meeting in Bristol!

ggrip2026.co.uk

03.02.2026 06:49 πŸ‘ 3 πŸ” 3 πŸ’¬ 0 πŸ“Œ 2

A reminder that the deadline to apply to join our editorial team is on Friday this week (16/01). Please get in touch with any questions and we hope to receive your application!

13.01.2026 20:04 πŸ‘ 0 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

Seismica is seeking a Community Coordinator to support the Executive Editor for Community. This role will help strengthen and sustain our organization by taking on several key responsibilities.
Estimated time commitment is ~5 hrs/month. For more details please email info@seismica.org by January 26.

13.01.2026 05:37 πŸ‘ 6 πŸ” 6 πŸ’¬ 0 πŸ“Œ 1
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Vol. 1 No. 2 (2025) | Advances in Geochemistry and Cosmochemistry Twitter/X: @WeAreAGCjournal

As we approach the end of 2025, we would like to invite you to read the first AGC volume, with the very first papers published by AGC here: journals.uu.se/AGC/issue/vi... We count on you to support our initiative. Publish with AGC, publish #doa πŸ’Ž

27.12.2025 12:34 πŸ‘ 6 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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πŸ“― Paper alert
Hallis et al. just published "The D/H ratio of the Martian Mantle: Evidence from the Lafayette Meteorite".
With this, we close our Vol1. Issue 2 πŸŽ‰ Congrats to all the featured authors for their work.
Thank you for supporting πŸ’ πŸ”“access AGC journal.
⬇️ What is this about?!

19.12.2025 15:07 πŸ‘ 4 πŸ” 3 πŸ’¬ 1 πŸ“Œ 0
Laboratory Coordinator I - Geosciences Maintenance and repair of the Organic Geochemistry Laboratory equipment, including but not limited to gas chromatographs, liquid chromatographs & ...

I am currently seeking a Lab Manager for our Organic Geochemistry Lab at the University of Arizona! Full time position with benefits. If you have a chemistry/biology/geology degree and like fixing things and working with students, this position could be for you! arizona.csod.com/ux/ats/caree...

15.10.2025 17:27 πŸ‘ 21 πŸ” 30 πŸ’¬ 1 πŸ“Œ 0
Advances in Geochemistry and Cosmochemistry Advances in Geochemistry and Cosmochemistry is a community-led diamond open access journal that aims to publish innovative and globally relevant articles in Geochemistry and Cosmochemistry.

✨ Monthly Recap from AGC ✨

πŸ“„ 2 new publications in cosmochemistry β€” bringing us to 5 since the launch!

πŸ“¨ Our ISSN is now permanent, a big milestone for the journal’s recognition.

🎨 The call for designs is still open β€” share your creative ideas (link in comment)

Let’s keep growing together! 🌍✨

13.10.2025 19:33 πŸ‘ 5 πŸ” 4 πŸ’¬ 1 πŸ“Œ 1

Delighted to see this paper out in @weareagc.bsky.social! We finally have a great journal where we can publish cosmochemistry papers that are free to read, and free to publish. No need to provide free labour to Elsevier, Wiley and co. so that they can make billions of $$$ and feed ChatGPT..

09.10.2025 09:07 πŸ‘ 8 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0
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New paper alert!

Tartèse et al. just published their new work in AGC:

"Petrogenesis of NΓ©ma 001, an alkali-rich meteorite from the acapulcoite-lodranite parent body"

Full free article available here: doi.org/10.33063/agc...

The cosmochemistry is well represented this week, thanks for your trust!

09.10.2025 08:11 πŸ‘ 4 πŸ” 4 πŸ’¬ 0 πŸ“Œ 1
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New paper alert!

Oliveira et al. just published in AGC:

"A petrological, geochemical, and geochronological study of Ramlat Fasad 532: An Omani addition to the Antarctic `YAMM' lunar meteorite group"

Here you can read the full free article: doi.org/10.33063/agc...

08.10.2025 07:19 πŸ‘ 4 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0
A petrological, geochemical, and geochronological study of Ramlat Fasad 532: An Omani addition to the Antarctic β€˜YAMM’ lunar meteorite group | Advances in Geochemistry and Cosmochemistry Anders, E., & Grevesse, N. (1989). Abundances of the elements: Meteoritic and solar. Geochimica et Cosmochimica Acta, 53(1), 197–214. https://doi.org/10.1016/0016-7037(89)90286-x

New @weareagc.bsky.social publication!

This time, Oliveira et al. present a study of a new lunar meteorite and investigate its parentage and transit to Earth.

More here: doi.org/10.33063/agc...

07.10.2025 10:40 πŸ‘ 4 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
Lecturer/PΕ«kenga - Geology Click the link provided to see the complete job description.

Geologists of bluesky, great opportunity at Otago Uni, NZ for a Lecturer in Earth Science! Special shout out to my #biomarker colleagues, the dept has a well set up, near new Org Geochem lab without a PI, with GCMS/FID and HPLC, if anyone wants a change of scene! βš’πŸ§ͺπŸ₯ΌπŸŒŠ
otago.taleo.net/careersectio...

16.09.2025 05:13 πŸ‘ 40 πŸ” 37 πŸ’¬ 1 πŸ“Œ 0

Support the diamond open access journals in geoscience!

Several really good options covering a broad range of fields.

The new journal @weareagc.bsky.social and the @eageo.bsky.social’s geochemical perspective letters and cover all things geochemistry.

12.08.2025 16:00 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

New paper in @weareagc.bsky.social!

This time looking at trace element partitioning in Fe-rich basaltic system and application to lunar basalts.

Read more for free here: doi.org/10.33063/agc...

29.07.2025 08:45 πŸ‘ 2 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

Thanks for the endorsement!

29.07.2025 08:33 πŸ‘ 2 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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We are currently seeking volunteers for our communications, tech and EDI teams!

If you are interested, or would like to know more, DM us or email admin@geomorphica.org

25.07.2025 15:36 πŸ‘ 2 πŸ” 2 πŸ’¬ 3 πŸ“Œ 0
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New published article entitled:

"Hopanoid distributions differ in mineral soils and peat: a re-evaluation of hopane-based pH proxies" from Inglis et al.

You will find the full article here: doi.org/10.33063/agc...

21.07.2025 12:11 πŸ‘ 10 πŸ” 6 πŸ’¬ 0 πŸ“Œ 0

Feeling creative? Want to help @weareagc.bsky.social raise funds to promote the journal activities?

We're looking for design ideas to put on t-shirts, coffee cups or any other merchandises.

Follow the link to form below πŸ‘‡πŸ‘‡

23.07.2025 12:47 πŸ‘ 0 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
Hopanoid distributions differ in mineral soils and peat: a re-evaluation of hopane-based pH proxies | Advances in Geochemistry and Cosmochemistry Angst, G., Mueller, K. E., Nierop, K. G. J., & Simpson, M. J. (2021). Plant- or microbial-derived? A review on the molecular composition of stabilized soil organic matter. Soil Biology and Biochemistry, 156, 108189. https://doi.org/10.1016/j.soilbio.2021.108189

New paper up in @weareagc.bsky.social! Thanks to @climategordon.bsky.social et al looking at hopanoid distributions soils and peat.

Read more: doi.org/10.33063/agc...

Advances in Geochemistry and Cosmochemistry is a community run Diamond Open Access journal. Submit your paper here: www.agcj.org

18.07.2025 08:24 πŸ‘ 4 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
Hopanoid distributions differ in mineral soils and peat: a re-evaluation of hopane-based pH proxies | Advances in Geochemistry and Cosmochemistry Advances in Geochemistry and Cosmochemistry, ISSNΒ 2977-1994Β | CC BY 4.0

✨Paper #2 has just been published @weareagc.bsky.social ✨ And it is about hopanoids!! Thank you @climategordon.bsky.social for trusting a brand new journal with your research. AGC is πŸ’Ž open access: free to publish and free to read πŸ™Œ Geochemists, come publish with us! journals.uu.se/AGC/article/...

17.07.2025 16:29 πŸ‘ 23 πŸ” 8 πŸ’¬ 0 πŸ“Œ 1
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AGC is very proud to announce the first published article!

Congratulations to the authors who believed in AGC in order to publish their study: doi.org/10.33063/agc...

This is only the beginning.
Many other researchers already submitted their work to AGC and we hope you will be the next ones!

09.07.2025 07:57 πŸ‘ 16 πŸ” 9 πŸ’¬ 0 πŸ“Œ 0
Can natural H2 be considered renewable? The reference case of a deep aquifer in an intracratonic sedimentary basin | Advances in Geochemistry and Cosmochemistry Abrajano T, Sturchio N, Bohlke J, Lyon G, Poreda R, Stevens C (1988). Methane-hydrogen gas seeps, Zambales Ophiolite, Philippines: Deep or shallow origin? Chemical Geology 71(1): 211–222. https://doi.org/10.1016/0009-2541(88)90116-7.

A new milestone for @weareagc.bsky.social.
Our first ever research article is now published!!

doi.org/10.33063/agc...

Free to read, free to publish. And more coming next week!

Thanks to the @eageo.bsky.social and @geochemsoc.bsky.social for their support along the way!

08.07.2025 06:40 πŸ‘ 12 πŸ” 5 πŸ’¬ 0 πŸ“Œ 1
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About Geodynamica - Geodynamica GeodynamicaΒ is a Diamond Open Access Journal covering all aspects of Earth’s and (exo-)Planets internal structure, dynamics and evolution

Mark the date: On July 15, it will be possible to submit articles to geodynamica.univ-lyon1.fr - it will be completely free for both authors and readers! I'm glad to be on the editorial team. Don't let some money-grubbing publishing company get between you and your research results; publish with us!

26.06.2025 21:18 πŸ‘ 8 πŸ” 5 πŸ’¬ 0 πŸ“Œ 1

#Factfriday Guild of Diamonds

Check out our sister journals Volcanica, @weareseismica.bsky.social , @wearetektonika.bsky.social , Geodynamica, @sedimentologika.bsky.social , and @weareagc.bsky.social . We are thankful for their support and happy to pass on knowledge to the upcoming journals.

06.06.2025 18:13 πŸ‘ 6 πŸ” 5 πŸ’¬ 0 πŸ“Œ 0
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an aerial view of a bridge over a river with a city in the background ALT: an aerial view of a bridge over a river with a city in the background

GGRiP 2026 – SAVE THE DATE!
We are excited to announce that the next Geochemistry Group Research in Progress (GGRiP) meeting will take place in Bristol on the 24th-26th March 2026. Watch this space (and website) for more information soon!

29.05.2025 12:07 πŸ‘ 0 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

Selection criteria was arc lavas with Mg# > 60. So some would be classified as adakites but not all.

Generally just linking a rock classification based on somewhat loose compositional parameters to dynamic processes is bound to be over simplistic.

30.04.2025 17:25 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Widespread slab melting in modern subduction zones It is still a matter of intense debate to what extent partial melting of the subducting slab contributes to arc magmatism in modern subduction zones. …

Jumping in for a counter point.

30.04.2025 16:48 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Open Access is also about making sure data is FAIR.

More details on our editorial policy and author guide pages

Author guide: journals.uu.se/AGC/authorgu...
Editorial Policy: journals.uu.se/AGC/editoria...

30.04.2025 07:54 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0