2018 AGU Fall Meeting Update: Dec. 14

The 2018 AGU Fall Meeting concluded on Friday, December 14, 2018. Photo: Roberto Molar Candanosa, DTM.
Friday, December 14, 2018 


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.

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.

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.

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.

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.

 

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

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



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