Page 32 - GeoPRISMS_Newsletter_Spring2019_42_Neat

GeoPRISMS at AGU Fall Meeting - Mini-Workshop Reports

December 10-14, 2018 AGU Fall Meeting, Washington, DC

GeoPRISMS provides the opportunity for groups of researchers to meet and discuss GeoPRISMS Science or planning activities at the
AGU Fall Meeting. Here are the reports from the Mini-Workshops organized at the 2018 AGU Fall Meeting.

ExTerra: Evolution of Arc Crust

Conveners: Stacia Gordon (University of Nevada-Reno), Alicia Cruz-Uribe (University of Maine)

On Sunday, December 9 , 34 scientists from a variety of institutions ExTerra. They also highlighted the recent success in obtaining
th
from the US and abroad gathered in Washington, D.C. prior to funding for a highly collaborative, multiple PI project through the
the start of the AGU Fall Meeting to discuss arc systems and, in NSF Partnerships in International Research and Education (PIRE)
particular, the major questions that still surround the evolution of arc program. Workshop leaders Stacia Gordon and Alicia Cruz-Uribe
crust and the tools and methods that will best answer these questions. presented an overview of the arc system - from the subducting
With the nearing end of GeoPRISMS, the workshop built upon the plate to the volcanic components - which combined provide
energy of this program and the discussions and questions that it critical details on the evolution of arc crust. They also laid out
has opened. This workshop was also motivated by ExTerra, a group some of the major questions concerning arc systems that had been
within the Geoscience community that studies Exhumed Terranes. included in past white papers. Finally, to stimulate ideas and lead
The ExTerra community has organized multiple workshops on into group discussions, Oliver Jagoutz (MIT) and his PhD student,
exhumed terranes, and scientific questions concerning what can be Benjamin Klein, presented a keynote talk on their geochemical,
learned from exhumed crustal arc sections have been included within geochronological, and structural results from the Sierra Nevada
the overall ExTerra framework. A 2016 ExTerra White Paper laid out batholith and the Kohistan Arc, and the knowledge that has been
a broad array of research themes linked to exhumed terranes. This gained about arc crust through these exhumed terranes.
GeoPRIMS workshop was intended to take the ExTerra White Paper
one-step further by having a focused discussion among the subset
of the ExTerra community particularly interested in arc systems.
GeoPRISMS Chair Demian Shaffer first gave a brief introduction
to familiarize the attendees with the GeoPRISMS program. Sarah
Penniston-Dorland and Maureen Feineman, lead organizers of
ExTerra and Principal Investigators on an ExTerra Field Institute
and Research Endeavor grant, then summarized the goals of

Participants and conveners at the pre-AGU GeoPRISMS
mini-workshop ExTerra: Evolution of Arc Crust

Photos by A. Férot

32 • GeoPRISMS Newsletter Issue No. 42 Spring 2019