#jezerodeltascience — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #jezerodeltascience, aggregated by home.social.
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With implications for #JezeroBrightRocks, a revisit of Nili Fossae regional minerals and mapped units.
Baker & Ehlmann: "Aluminum Phyllosilicate and Jarosite Formation Through Alteration of Reworked Al/Si-Rich Volcaniclastic Sediments in Nili Fossae"
https://doi.org/10.1029/2025JE009605 -
The final(?) iteration by the Freie Universität Berlin team on the #JezeroNorthernDelta was published last February.
Ovchinnikova et al: "Influence of the western inlet on the northern delta in Jezero crater: Topographic-compositional analysis and sediment transport modeling"
https://doi.org/10.1016/j.icarus.2025.116840A short summary also available at https://planetarygeomorphology.wordpress.com/2026/02/03/the-interaction-of-two-deltas-on-mars/
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From last December: a new iteration on the #JezeroBrightRocks studies (previously https://mastodon.social/@sharponlooker/114042437186059919), this time with comparison to Earth's analogs. It still doesn't extend beyond sol 1000 (Neretva Vallis) so it doesn't cover the CRISM detections around Pico Turquino/Seattle Park (fig. 7)
Broz et al: "Alteration history of aluminum-rich rocks at Jezero crater"
https://doi.org/10.1038/s43247-025-02856-3 -
From Dec 2025: dehydration experiment on a Bright Angel abrasion. They mention that it should be repeated with "wetter" minerals since the chosen BA formation has lower hydration than the delta front or #JezeroMarginUnit and more similar to the crater floor.
Connell et al: "Abrasion Patch Dehydration Experiment at Bright Angel, Jezero Crater, Using SuperCam Onboard the Mars 2020 Perseverance Rover"
https://doi.org/10.1029/2025JE009243 -
Carbonates identified even in the lower Jezero fan, e.g. at Rockytop. Open access paper for a limited time.
Williams et al: "Environmental conditions associated with carbonate-bearing rocks in lower Hawksbill Gap, Jezero western fan"
https://doi.org/10.1016/j.icarus.2026.117161
[EDIT]: limited time free access link: https://authors.elsevier.com/c/1nDA84L-YuPvbSupplementary at https://ars.els-cdn.com/content/image/1-s2.0-S0019103526002277-mmc1.pdf
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Nature´s microscopic art in Jezero's Earth analogue 😍
Słowakiewicz et al: "Hydromagnesite Precipitation in an Ultramafic-Hosted Alkaline Lake: Insights From Lake Salda for Jezero Crater"
https://doi.org/10.1029/2025JE009627 -
TL;DR: in situ carbonation of olivine is the preferred formation method for the #JezeroCrater carbonates detected by #PerseveranceRover along its trek.
"In Situ Carbonation of Sedimentary and Igneous Rocks of Ultramafic Composition in Jezero Crater"
https://doi.org/10.1029/2025JE009107 -
#AtokoPoint and other Mount Washburn rock observations behind a paywall 🤦♂️ One can at least access the supplementary materials and this short film:
https://www.youtube.com/watch?v=4UGbQNwgyFIJohnson et al: "Extensive Lithological Diversity of Float Rocks at the Mount Washburn Mound in Neretva Vallis, Jezero crater"
https://doi.org/10.1029/2025JE009439 -
Time to rethink what the mineralogy was saying about the #JezeroMarginUnit ? Radar sounding by RIMFAX finds deep traces of earlier deltas and rejects the igneous intrusive hypothesis. The plot thickens...
Cardarelli et al: "Ground penetrating radar observations of ancient large-scale deltaic structures in Jezero crater"
https://doi.org/10.1126/sciadv.adz6095 -
Hard to catch up with all the science when papers for 2 years of #PerseveranceRover campaigns (upper delta, margin unit and #NeretvaVallis / #JezeroBrightAngel) all get released within a few weeks 🤦♂️
Jones et al: "A Fluvio-Lacustrine Environment Preserved in the Jezero Crater Inlet Channel, Neretva Vallis"
https://doi.org/10.1029/2025JE009420 -
Referenced in the above paper, had escaped me due to a different journal. Another detailed description of, imho, the most complex part of #PerseveranceRover traverse.
Ives et al: "Sedimentology and stratigraphy of the fluvial–deltaic Skrinkle Haven member, Tenby formation"
https://doi.org/10.2110/jsr.2025.019 -
All the "gory" details on the Jezero margin unit 😉
Jones et al: "Stratigraphy of Carbonate-Bearing Rocks at the Margin of Jezero Crater: Evidence for Shoreline Processes?"
https://doi.org/10.1029/2025JE009111 -
There's also a reference to a new paper on the margin unit, with an excellent sketch of its proposed formation and alteration.
Williford et al : "Carbonated ultramafic igneous rocks in Jezero crater"
https://www.science.org/doi/10.1126/science.adu8264 -
The greenish spots at the southern bank of Neretva are also astrobiology-interesting. #LeopardSpots #ReddestRock #MalgosaCrest #JezeroDeltaScience
Broz et al: "Green reduction spots in red sedimentary rocks of the Bright Angel formation..."
https://agu.confex.com/agu/agu25/meetingapp.cgi/Paper/1990965 -
Detailed analyses of the Jezero regolith.
Shumway et al: "Mineralogically Diverse and Salt-Rich Regolith in Jezero Crater Characterized Using X-Ray Spectroscopy"
https://doi.org/10.1029/2024JE008912 -
Final peer reviewed version of https://mastodon.social/@sharponlooker/112877540889721765
Vaughan et al: "The Boulder-Rich Blocky Unit of the Western Jezero Upper Fan: Discriminating Olivine and Pyroxene Compositions and Constraining Provenance"
https://doi.org/10.1029/2025JE009159 -
Hurowitz et al: "Redox-driven mineral and organic associations in Jezero Crater, Mars"
https://doi.org/10.1038/s41586-025-09413-0 -
Munguira (EHU) et al: "Nighttime and Early Morning Atmospheric Waves and Transient Turbulence at Jezero Crater observed by #PerseveranceRover"
https://doi.org/10.1029/2025JE009114 -
Ovchinnikova et al: "Exploring the connection of the Northern and the Western Deltas in Jezero Crater"
https://doi.org/10.5194/epsc-dps2025-795"We interpret the uppermost LCP/smectite unit within the northern delta as material from the western inlet deposited over already existing topography of the ND. ...conclude that the main body of Jezero's ND is older than the WD but covered with the relatively thin and younger layer of silt deposits from the western inlet."
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Poster session with another iteration on the story of the Jezero delta formation as prograding on a shrinking lake
Mangold et al: "Paleolake variations of Lake Jezero, recorded by the deltaic architecture of Jezero crater western fan"
https://doi.org/10.5194/epsc-dps2025-217CW IANAG™: I still can't wrap my head around disregarding the curvilinear stuff as point bars, awaiting the final paper 😉
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Sounds like a long shot, but linking #PerseveranceRover observations of nickel over-abundance at #NeretvaVallis to the #LeopardSpots
Manelski et al: "Ore-Grade Nickel Hosted in Fine-Grained Sedimentary Rocks, Jezero Crater"
https://doi.org/10.5194/epsc-dps2025-431 -
Here's a new iteration on the #NeretvaVallis geology, with some new interpretations compared to the previous one (https://mastodon.social/@sharponlooker/113950679490539853). Unfortunately the figures are missing.
Jones et al: "A fluvio-lacustrine environment preserved in the Jezero crater inlet channel, Neretva Vallis"
https://doi.org/10.5194/epsc-dps2025-888 -
The kind of comparison with Eberswalde I've been waiting for...
Carlot et al: "Stratigraphic analysis of the Eberswalde sedimentary fan using orbital imagery and comparison with the Jezero delta"
https://doi.org/10.5194/epsc-dps2025-92 -
Analysis and rough classification of float rocks in the fan front with #PerseveranceRover's Mastcam + some SuperCam. No big surprises other than the absence of iron meteorites.
Kathir et al: "Multispectral Observations of Float Rocks Used to Investigate the Origin of Boulders on the Western Jezero Fan Front"
https://doi.org/10.1029/2024JE008702 -
Pinning down Jezero lake to a close/sporadically-open system by closely studying the outlet channel.
Villette et al: "The Sporadic Fluvial Regime of Pliva Vallis, the Outlet Valley of Jezero Crater Lake"
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024JE008862 -
Peer-reviewed, open access version of the above (post nr 11)
Beck et al : "From hydrated silica to quartz: Potential hydrothermal precipitates found in Jezero crater"
https://doi.org/10.1016/j.epsl.2025.119256 -
A jump back to Neretva and thread post nr 6 ( https://mastodon.social/@sharponlooker/113985129537205094 ), this time with strong measurements of organics.
Murphy and Uckert, et al : "Spatially Resolved Complex Organic Matter Detected in an Ancient River Valley in Jezero"
https://www.hou.usra.edu/meetings/lpsc2025/pdf/2241.pdf"We report the detection of macromolecular carbon (MMC) by Deep-UV Raman spectroscopy in multiple ancient riverbed rock targets in Jezero crater"
🧵 31/n
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Sharmili et al: "Exploring the Depositional and Erosional Morphology of Jezero Crater’s Western Fan Using Coupled Numerical Models of Sediment Deposition and Erosion"
https://www.hou.usra.edu/meetings/lpsc2025/pdf/1193.pdf"Based on the two coupled numerical models, the present study uncovers the potential scenario for the preservation of the Jezero Crater's western fan by erosion-resistant boulder deposits (capping unit), maintaining its shape over billions of years."
🧵 25/n
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Another really interesting poster that needs more work. It does already give good time-constraints for Bright Angel, although I could not find anywhere that BA would post-date the fan, as its conference summary says (maybe they mean the deformation folding).
Barnes et al : "Late Deformation of the Bright Angel Formation in Western Neretva Vallis"
https://www.hou.usra.edu/meetings/lpsc2025/pdf/2311.pdf🧵 23/n
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Poster on the mid and upper delta traverse. A tad incomplete, I'd rather wait for the final paper for better understanding. At least, a verification that the Margin Unit predates the delta/fan.
Russell et al : "RIMFAX GPR Observations of the Jezero Crater Western Fan and Transition to Margin Unit"
https://www.hou.usra.edu/meetings/lpsc2025/pdf/2455.pdf🧵 22/n