Ehlmann Research Group, Caltech @EhlmannLab

Planetary scientists and geologists dedicated to understanding planetary surfaces and developing new instruments/techniques for mineral and chemistry analysis ehlmann.caltech.edu Pasadena, CA Joined January 2018

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Bethany Ehlmann @bethanyehlmann

2 years ago

Launch window for @LunarTrailblazr opens today! 🚀🌚 Immensely proud of our team and looking forward to getting underway to map water on the Moon. Launching along with IM-2/SpaceX, separating ~48min after launch. @NASA coverage starts 6:30pm ET #PI_daily

NASA Marshall @NASA_Marshall

2 years ago

🚀🌙 @NASA’s Lunar Trailblazer mission is ready to live up to its name! The small satellite is riding along on @Int_Machines’ IM-2 launch, part of NASA’s CLPS initiative, which is slated to launch no earlier than Feb. 26. 🧵Check out this thread to learn more about the mission!

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Ehlmann Research Group, Caltech @EhlmannLab

2 years ago

Thesis title: “Location, Location, Location: Insights from Spatially-Resolved Microbial Habitation and Activity Patterns in Seep Carbonates at Santa Monica Basin, CA" (and a chapter on microimaging spectroscopy of carbonaceous chondrites)

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Ehlmann Research Group, Caltech @EhlmannLab

2 years ago

Congratulations to Dr. Sergio Parra on a successful PhD defense! (Advisors, and pictured below with Serg: @bethanyehlmann and @OrphanANME)

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Bethany Ehlmann @bethanyehlmann

2 years ago

Congrats to @Caltech @EhlmannLab alum Dr. Ellen Leask on her important findings for Mars history: sulfates connected with basin volcanoes, large ash deposits, late history saline waters -- Terra Sirenum holds an amazing record of Mars climate! Check out the paper 👇

JGR-Planets @jgrplanets

2 years ago

A 2Gyr History of Water-Alteration in Terra Sirenum, Mars: Volcanism's Influence on Al Clay Formation and Chemically Distinct Waters Forming Sulfates and Chlorides Into the Amazonian. buff.ly/4eBWXs7 Thick deposits with Al clays thin with distance from Arsia Mons.

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Bethany Ehlmann @bethanyehlmann

2 years ago

Former @Caltech @EhlmannLab postdoc Lucia Mandon traces more oxidized minerals in part of the Jezero crater delta relative to the floor or later rocks seen by @NASAPersevere in the upper delta

JGR-Planets @jgrplanets

2 years ago

Variable Iron Mineralogy and Redox Conditions Recorded in Ancient Rocks Measured by In Situ Visible/Near-Infrared Spectroscopy at Jezero Crater, Mars. buff.ly/4gAAOM7 Strata at the fan front saw stronger oxidative water‐ rock interactions vs the upper fan & crater floor.

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Bethany Ehlmann @bethanyehlmann

2 years ago

New paper from @Caltech @EhlmannLab grad student Yu Yu Phua et al shows the hydration state of sulfates in Mars rocks seen by @NASAPersevere. More dehydrated than @MarsCuriosity rocks (weird), and phases found indicate salty fluids for at least some of the waters in Jezero crater

JGR-Planets @jgrplanets

2 years ago

Characterizing Hydrated Sulfates and Altered Phases in Jezero Crater Fan and Floor Geologic Units With SHERLOC on Mars 2020. buff.ly/4em8JXi Hydrated Ca‐sulfates are found only in the upper fan.

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Ehlmann Research Group, Caltech @EhlmannLab

2 years ago

@Kampstronaut Welcome! We're thrilled to have you!

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Planetary Plot of the Week @PlanetaryPlots

2 years ago

This week, we have a plot demonstrating the spectral diversity of the rocks that the Perseverance rover has encountered in Jezero Crater. These spectra show variable iron mineralogy which indicates strong oxidative water-rock interactions in the Jezero delta deposits. (1/2)

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Ehlmann Research Group, Caltech @EhlmannLab

2 years ago

Wednesday morning poster, Oak Kanine: Paleoenvironmental analysis of Jezero Crater, Mars: stratigraphy and structure from rover instruments and orbital data #10thMars

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Ehlmann Research Group, Caltech @EhlmannLab

2 years ago

Tuesday morning poster, Samantha Baker: Clay mineralogy and stratigraphy in Nili Fossae suggest acidic alteration of transported sedimentary material rather than intensive leaching #10thMars

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Ehlmann Research Group, Caltech @EhlmannLab

2 years ago

We're excited to see many of you on campus @Caltech next week for #10thMars! Here are all the Ehlmann group presentations:

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Ehlmann Research Group, Caltech @EhlmannLab

2 years ago

And to get the mosaic, use the NASA PDS or go to the Murray Lab: murray-lab.caltech.edu/CTX/

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Ehlmann Research Group, Caltech @EhlmannLab

2 years ago

How did @ErroneousTholus and colleagues get 86,000+ images aligned to make a seamless 5m/pix image of Mars? Find out! Paper here: dx.doi.org/10.1029/2024EA… @bethanyehlmann @theAGU

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Ehlmann Research Group, Caltech @EhlmannLab

3 years ago

New @EhlmannLab paper by @AndrewAnnex showing how lavas on Jezero crater's floor followed topography set by sediments formed under earlier episodes of Lake Jezero - important for interpreting rover data. agupubs.onlinelibrary.wiley.com/doi/10.1029/20…

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Ehlmann Research Group, Caltech @EhlmannLab

3 years ago

Valeria Kachmar (poster, Tuesday): Spectral analyses of Ceres' surface water ice deposits help to constrain their emplacement processes #LPSC2024

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Ehlmann Research Group, Caltech @EhlmannLab

3 years ago

.@bethanyehlmann (talk, Tuesday 4:40 pm, Waterway 4): As Mars Sample Return is reworked, it is important to keep the scientific return that led to its prioritization by the Decedal Survey intact #LPSC2024