Sign in

Edward W. Marshall

@edmarshall.bsky.social
263 followers 98 following 63 posts

🌋 Geochemistry Postdoc at FAU Erlangen-Nürnberg in 🇩🇪. Studies Icelandic volcanism, magmas, and the mysteries of Earth's mantle.

PostsRepliesMedia
Reposted by Edward W. Marshall
Barbara Kleine-Marshall @barbaraikm.bsky.social · 09/03/2026
We are looking for 6 motivated Postdocs interested in various aspects of Earth system sciences. More information here: fau-earth-system-science.github.io #geochemistry
fau-earth-system-science.github.io
Earth System Research and Training at FAU
155
Edward W. Marshall @edmarshall.bsky.social · 14/01/2026
Hiring a new professor in my department who specializes in Earth surface topics (e.g. climate, sediments, soils, oceans, etc). Non-germans welcome to apply-- the postdoctoral qualifications (e.g. habilitation) are just for German applicants.
013
Reposted by Edward W. Marshall
Barbara Kleine-Marshall @barbaraikm.bsky.social · 28/11/2025
Come and measure your samples with our LA triple quadrupole ICP-MS! Our analyses: -trace elements in a wide range of geomaterials -S isotopes in sulfides -element mapping -U/Pb geochronology (coming soon!) -and more... www.gzn.nat.fau.eu/geochemistry-and-ore-deposits-2/la-icp-ms-laboratory/
gzn.nat.fau.eu
Geochemistry and ore deposits
The working group Geochemistry and ore deposits focuses on the fundamentals of element enrichment and depletion upon fluid transport and fluid-rock interaction in the Earth’s crust.
011
Reposted by Edward W. Marshall
EAG @eageo.bsky.social · 26/11/2025
Job alert: #postdoc in experimental Petrology/ Geochemistry, University of Innsbruck (AT). Apply by 11 January 2026 or position open until filled. More info: buff.ly/2A7JsJN
003
Reposted by Edward W. Marshall
Barbara Kleine-Marshall @barbaraikm.bsky.social · 03/10/2025
New article just published 🤗 Find out why the Iceland rift may provide such a significant source for mantle-derived CO2! agupubs.onlinelibrary.wiley.com/doi/10.1029/... #geochemistry
agupubs.onlinelibrary.wiley.com
Carbon Isotope and Abundance Systematics Reveal an Insignificant Crustal Sink of Mantle‐Derived CO2 in On‐Land Rift Zone Geothermal Systems
CO2 in carbonates of the Iceland crust predominantly originates from the mantle Only 1%–10% of mantle-derived CO2 that degasses along the Iceland rift zone is permanently fixed into carbonates C...
051
Reposted by Edward W. Marshall
Barbara Kleine-Marshall @barbaraikm.bsky.social · 27/09/2025
New publication out on the interaction of seawater with oceanic crust! 🌊 🪨 We show how temperature, reaction progress, time and crystallinity of the crust affect elemental fluxes! www.sciencedirect.com/science/arti...
sciencedirect.com
Modeling seawater-basalt interaction at 10–100 °C: Controlling parameters and effects on the composition of the oceanic crust and seawater
Chemical reactions and element mobilization during seawater-basalt interaction play a central role in regulating global element fluxes between seawate…
021
Reposted by Edward W. Marshall
Dawid Szymanowski @dawid.eurosky.social · 04/09/2025
Happy to share the long-awaited results of our community experiment comparing high-precision ID-TIMS U-Pb lab performance🧪⚒️ We do pretty well but as ever there is room for improvement 🤓 Stay tuned! doi.org/10.5194/gchr...
doi.org
Interlaboratory reproducibility of ID-TIMS U–Pb geochronology evaluated with a pre-spiked natural zircon solution
Abstract. The highest precision and accuracy in U–Pb geochronology is achieved using isotope dilution thermal ionisation mass spectrometry (ID-TIMS), a technique which owes its reliability to precise ...
0123
Reposted by Edward W. Marshall
Alberto Caracciolo @albertocaracciolo.bsky.social · 18/06/2025
The typeset version of the 2022-2023 Fagradalsfjall paper is out, so let’s go over the main points of the paper 🌋
academic.oup.com
Mush Disaggregation and Dike Propagation Timescales at Active Volcanoes: Evidence from the 2022–2023 Fagradalsfjall Eruptions
Abstract. The architectures of magma plumbing systems and timescales of magmatic processes are fundamental to understanding volcanic eruption dynamics. Thi
11111
Reposted by Edward W. Marshall
Johan Lissenberg @lissenbergjohan.bsky.social · 05/06/2025
Interested in crystal mushes? New review paper just out: rdcu.be/eo9pC Great to be part of the team!
rdcu.be
Crystal mush processes and crustal magmatism
Nature Reviews Earth & Environment - Crystal mush processes are key to magmatic differentiation, volcanic system behaviour and some mineral resources. This Review discusses the processes...
0203
Edward W. Marshall @edmarshall.bsky.social · 03/06/2025
Amazing work by @albertocaracciolo.bsky.social . It's the coolest diffusion timescale work I've ever seen. You can see each eruption priming and how they are related to one another. Just super cool science.
002
Reposted by Edward W. Marshall
Alberto Caracciolo @albertocaracciolo.bsky.social · 03/06/2025
🚨🌋New paper on the geochemistry and petrology of the 2022–23 Fagradalsfjall eruptions on the Reykjanes Peninsula, Iceland. We study temporal variations in the magmatic plumbing system and link diffusion timescales to monitoring signals, tracing the timing of mush disaggregation and dike propagation
academic.oup.com
Mush disaggregation and dike propagation timescales at active volcanoes – Evidence from the 2022-2023 Fagradalsfjall eruptions
Abstract. The architectures of magma plumbing systems and timescales of magmatic processes are fundamental to understanding volcanic eruption dynamics. Thi
0144
Reposted by Edward W. Marshall
Dr. Jennifer Wade @volcanojw.bsky.social · 31/05/2025
This proposed budget is a policy statement, not an appropriation. There are still a lot of steps and potential changes ahead before it becomes one. This is not a time to sit quietly, team. Let's go.
210641
Edward W. Marshall @edmarshall.bsky.social · 29/05/2025
This was written about media content, but the same can be said for scientific content. When the incentive structure is based around numbers of papers and numbers of citations, it's a system that assumes quantity means quality. It's ripe for abuse by AI, which can do quantity really well...
010
Reposted by Edward W. Marshall
Dr Val Finlayson @justsomeisotope.bsky.social · 30/04/2025
New paper out by my team, led originally by the late Jasper Konter, an amazing human being and scientist, and with important contributions from the late Paul Wessel, both of whom we lost during review. The whole team stepped up to get this paper to the finish line. www.nature.com/articles/s41...
nature.com
Pacific hotspots reveal a Louisville–Ontong Java Nui tectonic link - Nature
Geochemistry and geochronology show that Samoa and Rurutu–Arago are the longest-lived Pacific hotspots, providing better constraints on plate rotation and support for a link between the Louisville vol...
2226
Reposted by Edward W. Marshall
Alondra Nelson @alondra.bsky.social · 24/03/2025
Former Columbia provost Jonathan Cole-"Columbia’s leaders have weakened...our leadership among the greatest educational institutions in the world...If we don’t resist collectively by all legal means...we are apt to see the destruction of our most revered institutions” www.nytimes.com/2025/03/24/o...
nytimes.com
Opinion | Universities Gave Us the iPhone, the Jet Engine and Gatorade. We’re Tossing That Away.
The postwar compact on research that powered America’s economic and military dominance is under threat.
29739182
Edward W. Marshall @edmarshall.bsky.social · 13/03/2025
Phew--- looks like the earthquake swarm at the tip of the Reykjanes sputtered out. An eruption there would come straight through the geothermal field and power plant there, so it would be devastating! Although magma injection is probably good for the longevity of the geothermal reservoir!
An earthquake map of the Reykjanes peninsula. A bar on the bottom shows earthquakes over time. The earthquake swarm suddenly stopped about 5 hours ago.
051
Reposted by Edward W. Marshall
Kristín Jónsdóttir @krjonsdottir.bsky.social · 28/02/2025
Paper out! This is one of the main and last outcomes of the IS-TREMOR project supported by the Iceland Research Fund. Shoutout to Jean for leading this work! @seismotom.bsky.social @cocaudron.bsky.social
doi.org
Dynamics of the 2021 Fagradalsfjall Eruption (Iceland) Revealed by Volcanic Tremor Patterns
Seismic network-based analysis enables to measure spatial, temporal and spectral properties of distinct tremor patterns during the eruption Minute-long tremor bursts associated with pulsating lav...
0239
Edward W. Marshall @edmarshall.bsky.social · 27/02/2025
Are a geoscience student in the US thinking about a PhD, but feeling pessimistic about the future of US science? Come to Europe! We have 18 fully funded (and unfilled) PhD positions-- all related to fluid related processes within the Earth. Find out more & apply: formovfluid.eu/phd-positions/
formovfluid.eu
FormovFluid
176
Reposted by Edward W. Marshall
Dr. Julian Lozos @seismogenic.bsky.social · 22/02/2025
⚒️🧪 Today's Icelandic Met Office update says that the likelihood of another eruption increases as more time passes, since magma is still accumulating below. There's also a neat detailed map of the eruption start points and fissures from all 7 Sundhnúksgígar eruptions so far. vedur.is/um-vi/fretti...
A map of part of the Reykjanes Peninsula, Iceland, with the town of Grindavík toward the lower left corner. 
Gray lines mark lava barriers and black lines show roads - but a series of colored lines angling from lower left to upper right indicate the eruptive fissures from the seven eruptions along the Sundhnúksgígar crater row since December of 2023. The starting points of the eruptions are marked with stars, and with the exception of the January 2024 eruption (which started much further south), are clustered within 1 km of each other. The fissures at the center of the zone are also close together, but they parallel or cross each other, rather than completely overlapping. 
The areas shaded light gray on this map show ground that has been covered with new lava since December of 2023. It's most of the map.
27321
Edward W. Marshall @edmarshall.bsky.social · 05/02/2025
Woohoo! The website is up! I had good fun coming up with the lab motto- "mente et ardore". It's a take on the classic geology motto "mente et malleo" which means "by reason and hammer", but since it's a laser lab...
120
Reposted by Edward W. Marshall
Oliver Lamb @olamb245.bsky.social · 03/02/2025
GNS Science is hiring! We are looking for someone to join our team as an InSAR Scientist (17 Feb. deadline): nzcris.wd3.myworkdayjobs.com/en-US/nzcris... Or as a Senior Environmental Geochemist (24 Feb. deadline): nzcris.wd3.myworkdayjobs.com/en-US/nzcris...
0810
Reposted by Edward W. Marshall
Cin-Ty Lee @cintylee.bsky.social · 10/01/2025
A very interesting paper by Keeley in 2021 Science Advances. They analyzed all Santa Ana Wind (SAW) events and associated fires in Southern California between 1950s and 2020. www.science.org/doi/10.1126/...
science.org
Ignitions explain more than temperature or precipitation in driving Santa Ana wind fires
Temperature and precipitation play less of a role in predicting area burned compared to wind speed and number of ignitions.
1155
Edward W. Marshall @edmarshall.bsky.social · 05/01/2025
My recent article on the 2021 Fagradalsfjall eruption got a highlight in Eos! Cool! eos.org/editor-highl...
eos.org
Magma Diversity in Iceland - Eos
Iceland’s recent basalt eruptions originated at the crust-mantle boundary and show chemical variability over remarkably short timescales of weeks, suggesting exchanges between diverse magma sources.
061
Reposted by Edward W. Marshall
Jascha Polet @jascha.bsky.social · 28/12/2024
Axial seamount, off the Oregon coast, is getting ready to erupt (again) in 2025. The most well instrumented under sea volcano has reached similar inflation as when it erupted (as predicted at that time) in 2015. Real time data is online for anyone to see! ⚒️🧪🌋 www.sciencenews.org/article/scie...
Plot of differential inflation from the Eastern Caldera BPR (MJ03E) minus the Central Caldera BPR (MJ03F).  If the rate is positive, a blue dashed line extrapolates into the future using the average rate of differential inflation from the last 6 months; middle blue dot is date when 2015 inflation threshold is reached, right purple dot is when a threshold 20 cm higher will be reached. Specifics are included in the legend on the plot. https://axial.ceoas.oregonstate.edu/Forecasts4.html
510035
Reposted by Edward W. Marshall
Jim Metcalf @thermochronic.bsky.social · 13/12/2024
So how small are the zircons that we date in the lab? Here's a Fish Canyon Tuff zircon on a $5 bill for comparison!
03512
Reposted by Edward W. Marshall
Alberto Caracciolo @albertocaracciolo.bsky.social · 30/11/2024
Preliminary geochemical report on the November 2024 eruption at Sundhnúksgígar. Similar magma composition to the two previous eruptions 🌋
earthice.hi.is
Eruption at Sundhnúksgígar, November 2024 – preliminary petrographic and geochemical results  | Institute of Earth Sciences
165
Edward W. Marshall @edmarshall.bsky.social · 28/11/2024
My big paper on the 2021 Fagradalsfjall eruption is finally out! If you want to understand the recent eruptions on the Reykjanes Peninsula better, look no further: doi.org/10.1029/2024... Let’s dive in to what we found: 🧵 1/8
doi.org
The Petrology and Geochemistry of the 2021 Fagradalsfjall Eruption, Iceland: An Eruption Sourced From Multiple, Compositionally Diverse, Near‐Moho Sills
We use high frequency sampling to observe rapid changes in lava composition during the 183 day 2021 Fagradalsfjall eruption The eruption was sourced from 12 to 15 km depth, corresponding to the l...
34418
Reposted by Edward W. Marshall
Alberto Caracciolo @albertocaracciolo.bsky.social · 21/11/2024
Time to gradually transition to Bluesky. Excited to share footage from the latest eruption on the Reykjanes Peninsula for my first post 🌋
623634
Edward W. Marshall @edmarshall.bsky.social · 21/11/2024
Interested in where the #Grindavik eruptions are coming from? Check out our group's paper on the magmatic system supplying the eruptions! They are sourced from a complex of shallow magma bodies that mix their melts together during eruptions! www.science.org/doi/10.1126/...
science.org
A dynamic mid-crustal magma domain revealed by the 2023 to 2024 Sundhnúksgígar eruptions in Iceland
Mid-crustal magma domains are the source of many basaltic eruptions. Lavas from individual eruptions are often chemically homogeneous, suggesting that they derive from single, well-mixed magma reservo...
030
Edward W. Marshall @edmarshall.bsky.social · 17/11/2024
Post a picture you took (no description) to bring some zen to the timeline.
010
Reposted by Edward W. Marshall
Dr. Lynne Elkins @ljelkins.bsky.social · 03/10/2024
Fantastic news!! After years of hard work, my modeling manuscript with @sarahlambart.bsky.social has been officially published at Volcanica! www.jvolcanica.org/ojs/index.ph...
jvolcanica.org
Uranium-series disequilibria in MORB, revisited: A systematic numerical approach to partial melting of a heterogeneous mantle | Volcanica
2194
Edward W. Marshall @edmarshall.bsky.social · 28/09/2024
🌋Check out our new Science paper on the recent eruptions in Grindavik! By comprehensive sampling of each lava field we show that the eruptions are supplied by a complex of compositionally variable sills. A fantastic paper led by Simon Matthews 🌋 www.science.org/doi/10.1126/...
science.org
A dynamic mid-crustal magma domain revealed by the 2023 to 2024 Sundhnúksgígar eruptions, Iceland
Mid-crustal magma domains are the source of many basaltic eruptions. Lavas from individual eruptions are often chemically homogeneous, suggesting they derive from single well-mixed magma reservoirs. T...
0123
Edward W. Marshall @edmarshall.bsky.social · 10/11/2023
An eruption might be brewing on the Reykjanes. There's been a sill inflating for the past weeks, and it may have finally reached a tipping point and made a dike. Well see if the dike makes it to the surface, but hopefully not!
072