DTM wrapped up the 2018 AGU Fall Meeting with a series of oral and poster presentations on Friday, December 14, 2018.

Jonathan Tucker presented, "A high carbon content of the Hawaiian mantle from olivine-hosted melt inclusions." Tucker said melt inclusions from Hawaii have shrinkage bubbles with trapped CO2. His measurements suggest most of the carbon from the Hawaiian mantle is stored inside these bubbles.

“Whats the carbon flux and content of the Hawaiian mantle?” asks Jonathan Tucker at #AGU18. #CarnegieAGU pic.twitter.com/VF22AlnrEE

— Carnegie Planets (@CarnegiePlanets) December 14, 2018

In the same session, Kei Shimizu presented his talk, "Partial degassing and regassing of CO2 in CO2 undersaturated mid-ocean ridge basalts." Shimizu showed his measurements of CO2/Ba ratios in olivine-hosted melt inclusions from the Garret and Siqueiros transform faults, hypothesizing that the difference of CO2/Ba ratios in his measurements are due to mantle source signatures.

Kei shimizu presents: “Partial degassing and regassing of CO2 in CO2 undersaturated mid-ocean ridge basalts” at #AGU18. #CarnegieAGU pic.twitter.com/JteLVEIYYc

— Carnegie Planets (@CarnegiePlanets) December 14, 2018

Before their presentations, Tucker and Shimizu took a brief moment to remember the late Erik Hauri's contributions to their careers and to the field of geochemistry.

Larry Nittler presented a talk titled, "Disk Processes Diversify Planetary Compositions: Lessons from Mercury for Exoplanetary Science." Nittler emphasized data from the DTM-led MESSENGER mission is crucial for understanding planets orbiting other stars.

.@LarryNittler presents: “Disk Processes Diversify Planetary Compositions: Lessons from Mercury for Exoplanetary Science“ at #AGU18. #CarnegieAGU pic.twitter.com/5RF2e3F0VS

— Carnegie Planets (@CarnegiePlanets) December 14, 2018

Lara Wagner also presented a talk on Friday afternoon titled, "The Peruvian Flat Slab Sag: Constraints from the Pucallpa Seismic Nest." In her presentation, Wagner said the Pucallpa Nest defines the northernmost extent of the Peruvian flat slab sag, also noting that seismicity and change in the geometry of this slab could be related to the Mendaña fracture zone.

Lara Wagner presents: “The Peruvian Flat Slab Sag: Constraints from the Pucallpa Seismic Nest” at #AGU18. #CarnegieAGU pic.twitter.com/s252xDd3w5

— Carnegie Planets (@CarnegiePlanets) December 14, 2018

Jessica Arnold concluded DTM's participation at AGU on Friday afternoon with a poster titled, "Refractive Index Measurements of a Solar System Organic Analog." Arnold showed her work on analyzing the light scattered off meteorite and meteorite-analog powders. Her work on dust grain composition is important for figuring out the composition of debris disks and protoplanetary disks.

Our last presentation this #AGU18 is from Jessica Arnold, who’s presenting “Refractive Index Measurements of a Solar System Organic Analog,” at poster board 3050 until 4 today! #CarnegieAGU pic.twitter.com/zZwz8wnWKA

— Carnegie Planets (@CarnegiePlanets) December 14, 2018

Keep up with DTM scientists via Twitter, @CarnegiePlanets and @CarnegieScience using #CarnegieAGU!

Recap of DTM's week at #AGU18: https://bit.ly/2SBH2iQ